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Journal articles on the topic 'Eddies'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Wu, Xiaoci, Pengchao Jin, Yang Zhang, and Wei Yu. "Changing Humboldt Squid Abundance and Distribution at Different Stages of Oceanic Mesoscale Eddies." Journal of Marine Science and Engineering 12, no. 4 (2024): 626. http://dx.doi.org/10.3390/jmse12040626.

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Humboldt squid, Dosidicus gigas, is one of the main economic cephalopod species off Peruvian waters, and their abundance and distribution are regulated by localized oceanic mesoscale dynamical processes. To this end, the present study employs normalization and frequency distribution methods, combining mesoscale eddy, oceanic environment, and D. gigas fishery data. This is the first exploration into the different stages of mesoscale eddies during their evolution off Peruvian waters and their influence on the regional marine environment, as well as the abundance and distribution of D. gigas reso

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2

Early, Jeffrey J., R. M. Samelson, and Dudley B. Chelton. "The Evolution and Propagation of Quasigeostrophic Ocean Eddies*." Journal of Physical Oceanography 41, no. 8 (2011): 1535–55. http://dx.doi.org/10.1175/2011jpo4601.1.

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Abstract The long-term evolution of initially Gaussian eddies is studied in a reduced-gravity shallow-water model using both linear and nonlinear quasigeostrophic theory in an attempt to understand westward-propagating mesoscale eddies observed and tracked by satellite altimetry. By examining both isolated eddies and a large basin seeded with eddies with statistical characteristics consistent with those of observed eddies, it is shown that long-term eddy coherence and the zonal wavenumber–frequency power spectral density are best matched by the nonlinear model. Individual characteristics of th

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3

Liu, Jiaxin, Jue Ning, and Xu Chen. "Evolution of Different Types of Eddies Originating from Different Baroclinic Instability Types." Remote Sensing 15, no. 24 (2023): 5730. http://dx.doi.org/10.3390/rs15245730.

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This paper investigates the evolution of global eddies and various types of eddies originating from baroclinic instability (BCI) by utilizing satellite altimetry, Argo profiles, and climatology datasets. The structure of global eddies with regard to potential temperature anomalies experiences downward propagation and spreading from the periods of eddy growth to stabilization. However, from the eddy’s stabilization to the decay period, the process of spreading primarily occurs horizontally, and this process is usually accompanied by weakening. By comparing the evolution of eddies in three typic

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4

Wang, Yan, Ge Chen, Jie Yang, Zhipeng Gui, and Dehua Peng. "A submesoscale eddy identification dataset in the northwest Pacific Ocean derived from GOCI I chlorophyll a data based on deep learning." Earth System Science Data 16, no. 12 (2024): 5737–52. https://doi.org/10.5194/essd-16-5737-2024.

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Abstract. This paper presents a dataset on the identification of submesoscale eddies, derived from high-resolution chlorophyll a data captured by GOCI I in the northwest Pacific Ocean. Our methodology involves a combination of digital image processing, filtering, and object detection techniques, along with a specific chlorophyll a image enhancement procedure to extract essential information about submesoscale eddies. This information includes their time, polarity, geographical coordinates of the eddy center, eddy radius, coordinates of the upper left and lower right corners of the prediction b

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5

Avnur, Ron, and Joseph M. Hellerstein. "Eddies." ACM SIGMOD Record 29, no. 2 (2000): 261–72. http://dx.doi.org/10.1145/335191.335420.

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6

Yuan, Quanmu, and Jianyu Hu. "Spatiotemporal Characteristics and Volume Transport of Lagrangian Eddies in the Northwest Pacific." Remote Sensing 15, no. 17 (2023): 4355. http://dx.doi.org/10.3390/rs15174355.

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Mesoscale eddies play a crucial role in the transport of mass, heat, salt and nutrients, exerting significant influence on ocean circulation patterns, biogeochemical processes and the global climate system. Based on Lagrangian-Averaged Vorticity Deviation (LAVD) method, this study applies 27 years (1993–2019) of geostrophic current velocity data to detect Rotationally Coherent Lagrangian Vortices (RCLVs) in the Northwest Pacific (NWP; 10°N–30°N, 115°E–155°E), with the spatiotemporal characteristics of Eulerian Sea Surface Height Eddies (SSH eddies) and RCLVs being compared. A higher number of

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Lai, Yeping, Hao Zhou, Jing Yang, Yuming Zeng, and Biyang Wen. "Submesoscale Eddies in the Taiwan Strait Observed by High-Frequency Radars: Detection Algorithms and Eddy Properties." Journal of Atmospheric and Oceanic Technology 34, no. 4 (2017): 939–53. http://dx.doi.org/10.1175/jtech-d-16-0160.1.

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AbstractThis study compared the efficiencies of two widely used automatic eddy detection algorithms—that is, the winding-angle (WA) method and the vector geometry (VG) method—and investigated the submesoscale eddy properties using surface current observations derived from high-frequency radars (HFRs) in the Taiwan Strait. The results showed that the WA method using the streamline and the VG method based on the streamfunction field have almost the same capacity for identifying eddies, but the former is more competent than the latter in capturing the eddy size. The two algorithms simultaneously

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8

Huang, Xiaorong, and Guihua Wang. "Response of a Mesoscale Dipole Eddy to the Passage of a Tropical Cyclone: A Case Study Using Satellite Observations and Numerical Modeling." Remote Sensing 14, no. 12 (2022): 2865. http://dx.doi.org/10.3390/rs14122865.

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Mesoscale eddies occurring in the world’s oceans typically exist in pairs known as mesoscale dipole eddies or simply dipole eddies. Tropical cyclones (hereafter TCs) that move over the world’s oceans often encounter and interact with these dipole eddies. Through this interaction, TCs induce significant perturbations in the mesoscale eddies. However, the specific influences that the passage of a TC on a dipole eddy have not been addressed. In this paper, a case study of the dipole eddy’s response to the passage of a TC is conducted by using satellite observations and numerical simulation. The p

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9

Shang, Longquan, Kaifeng Han, Feng Chen, Ning Wang, and Jiaqing Lu. "Statistical Analysis of Mesoscale Eddy Characteristics in the northwestern Pacific Ocean." Journal of Physics: Conference Series 2718, no. 1 (2024): 012005. http://dx.doi.org/10.1088/1742-6596/2718/1/012005.

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Abstract In this paper, the mesoscale eddy data set established by Professor Chelton in Oregon State University is used to analyse the statistical characteristics of mesoscale eddies in the Northwest Pacific Ocean. Mesoscale eddies in this region are divided into short-lived, Mid-lived, and long-lived eddies according to their life cycle with the aim of exploring the characteristics of eddies with different life cycles. Those with a life cycle of less than 6 weeks, 6-9 weeks, and more than 9 weeks are defined as short-lived eddies, mid-lived eddies, and long-lived eddies, respectively. The res

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10

Monin, A. S., and G. M. Zhikharev. "Ocean eddies." Uspekhi Fizicheskih Nauk 160, no. 5 (1990): 1. http://dx.doi.org/10.3367/ufnr.0160.199005a.0001.

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11

Monin, A. S., and G. M. Zhikharev. "Ocean eddies." Soviet Physics Uspekhi 33, no. 5 (1990): 313–39. http://dx.doi.org/10.1070/pu1990v033n05abeh002569.

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12

Eldevik, Tor, and Kristian B. Dysthe. "Spiral Eddies." Journal of Physical Oceanography 32, no. 3 (2002): 851–69. http://dx.doi.org/10.1175/1520-0485(2002)032<0851:se>2.0.co;2.

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13

NOF, DORON. "Orbiting eddies." Tellus A 43, no. 1 (1991): 64–67. http://dx.doi.org/10.1034/j.1600-0870.1991.t01-4-00006.x.

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14

Ma, Yaowei, Qinghong Li, Xiangjun Yu, Song Li, and Xingyu Zhou. "Observation of Statistical Characteristics and Vertical Structures of Surface Warm Cyclonic Eddies and Cold Anticyclonic Eddies in the North Pacific Subtropical Countercurrent Region." Journal of Marine Science and Engineering 12, no. 10 (2024): 1783. http://dx.doi.org/10.3390/jmse12101783.

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Conventional wisdom about mesoscale eddies is that cyclonic (anticyclonic) eddies are commonly associated with cold(warm) surface cores. Nevertheless, plenties of surface warm cyclonic eddies (WCEs) and cold anticyclonic eddies (CAEs) in the North Pacific Subtropical Countercurrent (STCC) region are observed by a synergistic investigation based on data from satellite altimetry, microwave radiometer, and Argo float profiles in this study. The results indicate that these two types of abnormal eddies (WCEs and CAEs) are prevalent in the STCC region, comprising approximately 30% of all eddies dete

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15

Zheng, Shaojun, Yan Du, Jiaxun Li, and Xuhua Cheng. "Eddy characteristics in the South Indian Ocean as inferred from surface drifter." Ocean Science Discussions 11, no. 6 (2014): 2879–905. http://dx.doi.org/10.5194/osd-11-2879-2014.

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Abstract. Using a geometric eddy identification method, cyclonic and anticyclonic eddies from submesoscale to mesoscale in the South Indian Ocean (SIO) have been statistically investigated based on 2082 surface drifters from 1979 to 2013. 19252 eddies are identified with 60% anticyclonic eddies. For the submesoscale eddies (radius r < 10 km), the ratio of cyclonic eddies (3183) to anticyclonic eddies (7182) is 1 to 2. In contrast, number of anticyclonic and cyclonic eddies with radius r ≥ 10 km is almost equal. Mesoscale and submesoscale eddies show different spatial distribution. Eddies wi

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Zheng, S., Y. Du, J. Li, and X. Cheng. "Eddy characteristics in the South Indian Ocean as inferred from surface drifters." Ocean Science 11, no. 3 (2015): 361–71. http://dx.doi.org/10.5194/os-11-361-2015.

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Abstract. Using a geometric eddy identification method, cyclonic and anticyclonic eddies from submesoscale to mesoscale in the South Indian Ocean (SIO) have been statistically investigated based on 2082 surface drifters from 1979 to 2013. A total of 19 252 eddies are identified, 60% of them anticyclonic eddies. For the submesoscale eddies (radius r<10 km), the ratio of cyclonic eddies (3183) to anticyclonic eddies (7182) is 1 to 2. In contrast, the number of anticyclonic and cyclonic eddies with radius r≥10 km is almost equal. Mesoscale and submesoscale eddies show different spatial distrib

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17

Liu, Qian, Yingjie Liu, and Xiaofeng Li. "Characteristics of surface physical and biogeochemical parameters within mesoscale eddies in the Southern Ocean." Biogeosciences 20, no. 23 (2023): 4857–74. http://dx.doi.org/10.5194/bg-20-4857-2023.

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Abstract. Using satellite sea surface temperature (SST) and chlorophyll a (Chl a) as well as observation-based reconstruction of dissolved inorganic carbon (DIC) and partial pressure of CO2 (pCO2) from 1996 to 2015, we investigate the modulation mechanisms of eddies on surface physical and biogeochemical parameters in the Southern Ocean (SO). About one-quarter of eddies are observed to be “abnormal” (cold anticyclonic and warm cyclonic eddies) in the SO, which show opposite SST signatures to “normal” eddies (warm anticyclonic and cold cyclonic eddies). The study finds that the modification of

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18

Liu, Xintong, Chunhua Qiu, Tianlin Wang, Huabin Mao, and Peng Xiao. "Influence of Abnormal Eddies on Seasonal Variations in Sonic Layer Depth in the South China Sea." Remote Sensing 16, no. 15 (2024): 2845. http://dx.doi.org/10.3390/rs16152845.

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Sonic layer depth (SLD) is crucial in ocean acoustics research and profoundly influences sound propagation and Sonar detection. Carrying 90% of oceanic kinetic energy, mesoscale eddies significantly impact the propagation of acoustic energy in the ocean. Recent studies classified mesoscale eddies into normal eddies (warm anticyclonic and cold cyclonic eddies) and abnormal eddies (cold anticyclonic and warm cyclonic eddies). However, the influence of mesoscale eddies, especially abnormal eddies, on SLD remains unclear. Based on satellite altimeter and reanalysis data, we explored the influence

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19

Luo, Dehai. "A Barotropic Envelope Rossby Soliton Model for Block–Eddy Interaction. Part III: Wavenumber Conservation Theorems for Isolated Blocks and Deformed Eddies." Journal of the Atmospheric Sciences 62, no. 11 (2005): 3839–59. http://dx.doi.org/10.1175/jas3573.1.

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Abstract In a series of previous papers, an envelope Rossby soliton theory was formulated to investigate the interaction between a preexisting planetary wave and synoptic-scale eddies leading to a typical blocking flow. In this paper, numerical and analytical studies are presented in order to examine the interactive relationship between an isolated vortex pair block and deformed synoptic-scale eddies during their interaction. The deformed blocked flow and eddies are found to satisfy the wavenumber conservation theorem. It is shown that the feedback by a blocked flow on the preexisting synoptic

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20

Jin, Yang, Meibing Jin, Dongxiao Wang, and Changming Dong. "Statistical Analysis of Multi-Year South China Sea Eddies and Exploration of Eddy Classification." Remote Sensing 16, no. 10 (2024): 1818. http://dx.doi.org/10.3390/rs16101818.

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Mesoscale eddies are structures of seawater motion with horizontal scales of tens to hundreds of kilometers, impact depths of tens to hundreds of meters, and time scales of days to months. This study presents a statistical analysis of mesoscale eddies in the South China Sea (SCS) from 1993 to 2021 based on eddies extracted from satellite remote sensing data using the vector geometry eddy detection method. On average, about 230 eddies with a wide spatial and temporal distribution are observed each year, and the numbers of CEs (52.2%) and AEs (47.8%) are almost similar, with a significant correl

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21

Li, J. X., R. Zhang, and B. Jin. "Eddy characteristics in the Northern South China Sea as inferred from Lagrangian drifter data." Ocean Science Discussions 8, no. 4 (2011): 1575–99. http://dx.doi.org/10.5194/osd-8-1575-2011.

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Abstract. Cyclones and anticyclones from large scale to submesoscale on the Northern South China Sea (NSCS) have been statistically characterized based on the satellite-tracked Lagrangian drifter data using a geometric eddy identification method. There are totally 1972 eddies identified, 4/5 of which are anticyclonic eddies. If the submesoscale eddies are eliminated, the other eddies in the NSCS will show a 1.1–1 dominance with the number (133) of anticyclones over the number (122) of cyclones. The spatial distribution of all the eddies are: in Zone Z1, the number of anticyclones dominate the

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22

TRAVKIN, V. S., N. A. TIKHONOVA, and E. A. ZAKHARCHUK. "MESOSCALE EDDIES OF THE BALTIC SEA ACCORDING TO THE PHYSCIAL REANALYSIS." Meteorologiya i Gidrologiya, no. 9 (September 2024): 35–49. https://doi.org/10.52002/0130-2906-2024-9-35-49.

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The mesoscale eddies of the Baltic Sea are analyzed based on the algorithm for automatic identification of eddies and the BALTICSEA_REANALYSIS_PHY_003_011 data. It is shown that most of mesoscale eddies have an amplitude (a level difference from the center to the boundary of an eddy) of 0.05-0.20 m, a radius of 5-10 km, and a lifetime of 2-3 days. From 1993 to 2020, 120000 eddies were detected, the number of cyclones exceeded the number of anticyclones, and anticyclones had a larger radius, geostrophic velocity, and lifetime. On average, Baltic eddies have a geostrophic velocity of about 6.5 c

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23

Shi, Yiyun, Xiaohui Liu, Tongya Liu, and Dake Chen. "Characteristics of Mesoscale Eddies in the Vicinity of the Kuroshio: Statistics from Satellite Altimeter Observations and OFES Model Data." Journal of Marine Science and Engineering 10, no. 12 (2022): 1975. http://dx.doi.org/10.3390/jmse10121975.

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Mesoscale eddies propagate westward in the northwestern Pacific Ocean and interact with the Kuroshio in the vicinity of the western boundary of the ocean. However, the processes affecting the eddy properties and the detailed structure of the eddies when they encounter the Kuroshio remain unclear. In this study, we analyze the statistics of the eddy properties around the Kuroshio using 25 years of satellite altimeter data and the eddy-resolving OFES model product. The spatial compositions of the eddies in the northwestern Pacific show that, as the eddies propagate westward, their radius and amp

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Du, Tianshi, and Zhao Jing. "Fine-Scale Eddies Detected by SWOT in the Kuroshio Extension." Remote Sensing 16, no. 18 (2024): 3488. http://dx.doi.org/10.3390/rs16183488.

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Conventional altimetry has greatly advanced our understanding of mesoscale eddies but falls short in studying fine-scale eddies (<150 km). The newly launched Surface Water and Ocean Topography (SWOT) altimeter, however, with its unprecedented high-resolution capabilities, offers new opportunities to observe these fine-scale eddies. In this study, we use SWOT data to explore these previously elusive fine-scale eddies in the Kuroshio Extension. During SWOT’s fast sampling phase from 29 May 2023 to 10 July 2023, we identified an average of 4.5 fine-scale eddies within each 120 km wide swath. C

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Pilo, G. S., M. M. Mata, and J. L. L. Azevedo. "Eddy Surface properties and propagation at Southern Hemisphere western boundary current systems." Ocean Science Discussions 12, no. 1 (2015): 135–60. http://dx.doi.org/10.5194/osd-12-135-2015.

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Abstract. Oceanic eddies occur in all world oceans, but are more energetic when associated to western boundary currents (WBC) systems. In these regions, eddies play an important role on mixing and energy exchange. Therefore, it is important to quantify and qualify eddies occurring within these systems. Previous studies performed eddy censuses in Southern Hemisphere WBC systems. However, important aspects of local eddy population are still unknown. Main questions to be answered relate to eddies' spatial distribution, propagation and lifetime within each system. Here, we use a global eddy datase

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MAHPEYKAR, Omid, LARKI Amir ASHTARI, and Mohammad Akbarinansab. "Automatic detection of eddies and influence of warm eddy on sound propagation in the Persian Gulf." Marine Reports 3, no. 1 (2024): 1–20. https://doi.org/10.5281/zenodo.12335495.

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Eddies are among the most complex phenomena in marine environments, with significant impacts on hydrodynamic parameters. Various intelligent algorithms are utilized to identify and analyze these eddies. In this study, a vector geometry algorithm based on the rotation of velocity vectors was employed to detect and extract eddies in the Persian Gulf. The algorithm utilizes horizontal velocity components from numerical modeling as inputs. Following eddy extraction, their characteristics were thoroughly examined. A total of 4308 cyclonic and 2860 anticyclonic eddies were identified at the surface,

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Kuang, Xiaodi, Zhiyuan Zhang, Jingshi Li, and chengyi Yuan. "An interpretation experiment on eddies’ role in sound propagation in the ocean using ray model." Journal of Physics: Conference Series 2718, no. 1 (2024): 012081. http://dx.doi.org/10.1088/1742-6596/2718/1/012081.

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Abstract The relationship between mesoscale eddies and ambient acoustic propagation under different conditions were studied using high resolution ocean reanalysis products in South China Sea, which was summarized by a linear-equation representing the convergence zone change with respect to eddy signatures and source positions. Beyond the experiments scales, warm eddies “dragged” the sound propagation and cold eddies “squeezed” that in contrast, and the acoustic amplifying mechanism can be summarized as stronger(eddies), nearer(eddies) and deeper(source).

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Canuto, V. M., and M. S. Dubovikov. "Modeling mesoscale eddies." Ocean Modelling 8, no. 1-2 (2005): 1–30. http://dx.doi.org/10.1016/j.ocemod.2003.11.003.

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Millot, C., I. Taupier-Letage, and M. Benzohra. "The Algerian eddies." Earth-Science Reviews 27, no. 3 (1990): 203–19. http://dx.doi.org/10.1016/0012-8252(90)90003-e.

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Drikakis, D., L. G. Margolin, and P. K. Smolarkiewicz. "On ?spurious? eddies." International Journal for Numerical Methods in Fluids 40, no. 1-2 (2002): 313–22. http://dx.doi.org/10.1002/fld.288.

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Arruda, Wilton Z., and Doron Nof. "The Mindanao and Halmahera Eddies—Twin Eddies Induced by Nonlinearities." Journal of Physical Oceanography 33, no. 12 (2003): 2815–30. http://dx.doi.org/10.1175/1520-0485(2003)033<2815:tmahee>2.0.co;2.

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Karstensen, J., B. Fiedler, F. Schütte, et al. "Open ocean dead zones in the tropical North Atlantic Ocean." Biogeosciences 12, no. 8 (2015): 2597–605. http://dx.doi.org/10.5194/bg-12-2597-2015.

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Abstract. Here we present first observations, from instrumentation installed on moorings and a float, of unexpectedly low (<2 μmol kg−1) oxygen environments in the open waters of the tropical North Atlantic, a region where oxygen concentration does normally not fall much below 40 μmol kg−1. The low-oxygen zones are created at shallow depth, just below the mixed layer, in the euphotic zone of cyclonic eddies and anticyclonic-modewater eddies. Both types of eddies are prone to high surface productivity. Net respiration rates for the eddies are found to be 3 to 5 times higher when compared wit

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Cui, Wei, Jungang Yang, Yongjun Jia, and Jie Zhang. "Oceanic Eddy Detection and Analysis from Satellite-Derived SSH and SST Fields in the Kuroshio Extension." Remote Sensing 14, no. 22 (2022): 5776. http://dx.doi.org/10.3390/rs14225776.

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Vigorous mesoscale eddies are broadly distributed in the Kuroshio Extension and can generally be identified from sea surface height (SSH) and sea surface temperature (SST) fields. Nevertheless, the changes in SSH and SST caused by mesoscale eddies and their seasonal correlation in the Kuroshio Extension are not clear, as well as the difference between identified eddy results from the two data. Combining in situ Argo float profiles data, the correlation between SSH anomaly (SSHA) and SST anomaly (SSTA) signals in mesoscale eddies are analyzed. The result shows that SSTA–SSHA signals inside eddi

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Aguedjou, Habib Micaël A., Alexis Chaigneau, Isabelle Dadou, Yves Morel, Ezinvi Baloïtcha, and Casimir Y. Da-Allada. "Imprint of Mesoscale Eddies on Air-Sea Interaction in the Tropical Atlantic Ocean." Remote Sensing 15, no. 12 (2023): 3087. http://dx.doi.org/10.3390/rs15123087.

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This study investigates the effect of mesoscale eddies on air–sea heat and fresh water exchange in the tropical Atlantic Ocean (TAO) using 8 years of satellite altimetry data, combined with sea surface temperature (SST), latent and sensible heat fluxes (LHF and SHF), infrared fluxes (IRF) and precipitation (PR) data. Results indicate that approximately ∼40% of cyclonic eddies contribute to warm SST anomalies, and ∼40% of anticyclonic eddies contribute to cold SST anomalies. Eddies were found to play a role in the variability in LHF, SHF and IRF, contributing 10–35% of their total variability,

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Wang, Xue, Shaoqing Zhang, Xiaopei Lin, Bo Qiu, and Yang Gao. "Transformations between Normal and Abnormal Mesoscale Eddies in the Bay of Bengal." Journal of Physical Oceanography 55, no. 3 (2025): 257–75. https://doi.org/10.1175/jpo-d-24-0045.1.

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Abstract It is conventionally accepted that anticyclonic and cyclonic eddies are associated with anomalous warm and cold sea surface temperatures (SSTs), respectively. Nevertheless, recent studies have revealed a common occurrence of abnormal eddies with anticyclonic cold cores and cyclonic warm cores in global oceans, particularly abundant in highly unstable currents and tropical oceans with shallow surface mixed layers. The Bay of Bengal (BoB), known for its huge freshwater input and strong upper-layer stratification, is favorable for generating abnormal eddies, yet little is known about the

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Yang, Shengmu, Jiuxing Xing, Daoyi Chen, and Shengli Chen. "A modelling study of eddy-splitting by an island/seamount." Ocean Science 13, no. 5 (2017): 837–49. http://dx.doi.org/10.5194/os-13-837-2017.

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Abstract. A mesoscale eddy's trajectory and its interaction with topography under the planetary β and nonlinear effects in the South China Sea are examined using the MIT General Circulation Model (MITgcm). Warm eddies propagate to the southwest while cold eddies propagate to the northwest. The propagation speed of both warm and cold eddies is about 2.4 km day−1 in the model. The eddy trajectory and its structure are affected by an island or a seamount, in particular, under certain conditions, the eddy may split during the interaction with an island/seamount. We focus this research on two param

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Liu, F., S. Tang, and C. Chen. "Satellite observations of the small-scale cyclonic eddies in the western South China Sea." Biogeosciences 12, no. 2 (2015): 299–305. http://dx.doi.org/10.5194/bg-12-299-2015.

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Abstract. High-resolution ocean color observations offer an opportunity to investigate the oceanic small-scale processes. In this study, the Medium Resolution Imaging Spectrometer (MERIS) daily 300 m data were used to study small-scale processes in the western South China Sea. It is indicated that the cyclonic eddies with horizontal scales of 10 km are frequently observed during the upwelling season of each year over the 2004–2009 period. These small-scale eddies were generated in the vicinity of the southern front of the cold tongue, and then propagated eastward with a speed of approximately

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Ueno, Hiromichi, Kanako Sato, Howard J. Freeland, et al. "Anticyclonic Eddies in the Alaskan Stream." Journal of Physical Oceanography 39, no. 4 (2009): 934–51. http://dx.doi.org/10.1175/2008jpo3948.1.

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Abstract Anticyclonic eddies propagating southwestward in the Alaskan Stream (AS) were investigated through analysis of altimetry data from satellite observations during 1992–2006 and hydrographic data from profiling float observations during 2001–06. Fifteen long-lived eddies were identified and categorized based on their area of first appearance. Three eddies were present at the beginning of the satellite observations; another three formed in the eastern Gulf of Alaska off Sitka, Alaska; and four were first detected at the head of the Gulf of Alaska near Yakutat, Alaska. The other five eddie

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Liu, F., S. Tang, and C. Chen. "Satellite observations of the small-scale cyclonic eddies in the western South China Sea." Biogeosciences Discussions 11, no. 9 (2014): 13515–32. http://dx.doi.org/10.5194/bgd-11-13515-2014.

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Abstract. High-resolution ocean color observation offers an opportunity to investigate the oceanic small-scale processes. In this study, The Medium Resolution Imaging Spectrometer (MERIS) daily 300 m data are used to study small-scale processes in the western South China Sea. It is indicated that the cyclonic eddies with horizontal scales of the order of 10 km are frequently observed during upwelling season of each year over 2004–2009. These small-scale eddies are generated in the vicinity of the southern front of the cold tongue, and then propagate eastward with a speed of approximately 12 cm

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Wu, Youwei, Yongchui Zhang, Wen Chen, et al. "The Impact of Mesoscale Eddies on Surface and Subsurface Sound Channels in the Kuroshio Extension." Remote Sensing 17, no. 8 (2025): 1360. https://doi.org/10.3390/rs17081360.

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Mesoscale eddies induce significant variations in the temperature and salinity of the upper ocean, thereby exerting a substantial impact on sound propagation. Specifically, they can form or dissipate surface sound channels (SCs) and subsurface sound channels (SSCs). However, the specific impact of mesoscale eddies remains unclear at present. In this paper, META2.0, Argo, and SODA are employed to analyze the sound propagation characteristics of mesoscale eddies in the Kuroshio Extension (KE) by using a composite analysis method and a ray-tracing model. Results demonstrate that cyclonic eddies (

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Ni, Qinbiao, Xiaoming Zhai, Zhibin Yang, and Dake Chen. "Generation of Cold Anticyclonic Eddies and Warm Cyclonic Eddies in the Tropical Oceans." Journal of Physical Oceanography 53, no. 6 (2023): 1485–98. http://dx.doi.org/10.1175/jpo-d-22-0197.1.

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Abstract Mesoscale eddies are ubiquitous features of the global ocean circulation. Traditionally, anticyclonic eddies are thought to be associated with positive temperature anomalies while cyclonic eddies are associated with negative temperature anomalies. However, our recent study found that about one-fifth of the eddies identified from global satellite observations are cold-core anticyclonic eddies (CAEs) and warm-core cyclonic eddies (WCEs). Here we show that in the tropical oceans where the probabilities of CAEs and WCEs are high, there are significantly more CAEs and WCEs in summer than i

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Hao, Zhanjiu, Zhenhua Xu, Ming Feng, Qun Li, and Baoshu Yin. "Spatiotemporal Variability of Mesoscale Eddies in the Indonesian Seas." Remote Sensing 13, no. 5 (2021): 1017. http://dx.doi.org/10.3390/rs13051017.

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Mesoscale eddies are ubiquitous in the world ocean and well researched both globally and regionally, while their properties and distributions across the whole Indonesian Seas are not yet fully understood. This study investigates for the first time the spatiotemporal variations and generation mechanisms of mesoscale eddies across the whole Indonesian Seas. Eddies are detected from altimetry sea level anomalies by an automatic identification algorithm. The Sulu Sea, Sulawesi Sea, Maluku Sea and Banda Sea are the main eddy generation regions. More than 80% of eddies are short-lived with a lifetim

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Liu, Tongya, and Ryan Abernathey. "A global Lagrangian eddy dataset based on satellite altimetry." Earth System Science Data 15, no. 4 (2023): 1765–78. http://dx.doi.org/10.5194/essd-15-1765-2023.

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Abstract. The methods used to identify coherent ocean eddies are either Eulerian or Lagrangian in nature, and nearly all existing eddy datasets are based on the Eulerian method. In this study, millions of Lagrangian particles are advected by satellite-derived surface geostrophic velocities over the period of 1993–2019. Using the method of Lagrangian-averaged vorticity deviation (LAVD), we present a global Lagrangian eddy dataset (GLED v1.0, Liu and Abernathey, 2022, https://doi.org/10.5281/zenodo.7349753). This open-source dataset contains not only the general features (eddy center position, e

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Zhang, Yang, Xiu-Qun Yang, Yu Nie, and Gang Chen. "Annular Mode–Like Variation in a Multilayer Quasigeostrophic Model." Journal of the Atmospheric Sciences 69, no. 10 (2012): 2940–58. http://dx.doi.org/10.1175/jas-d-11-0214.1.

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Abstract Eddy–zonal flow interactions in the annular modes are investigated in this study using a modified beta-plane multilayer quasigeostrophic (QG) channel model. This study shows the different response of high- and low-phase-speed (frequency) eddies to the zonal wind anomalies and suggests a baroclinic mechanism through which the two eddies work symbiotically maintaining the positive eddy feedback in the annular modes. Analysis also indicates that the different roles played by these two eddies in the annular modes are related to the differences in their critical line distributions. Eddies

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Sun, Wen Zheng, Jian Cheng Kang, Guo Qi Han, et al. "Temporal and Spatial Variation of Vortex at Northeast Taiwan from 1992 to 2009." Advanced Materials Research 518-523 (May 2012): 4278–82. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.4278.

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Using the satellite altimetric sea level data during 1992 to 2009 from AVISO, analyzed seasonal, annual variations of vortexes in northeast Taiwan (24°N ~ 27°N, 120°E ~ 124°E). The result shows that: (1) Cyclonic and anti-cyclonic eddies are found in research area and had significant seasonal variation; (2) Cyclonic eddies had five-years cycle in winter; (3) Cyclonic eddies and anti-cyclonic eddies often appeared in pairs and swing in the east-west direction simultaneously; (4) Changes in spatial distribution of the eddies are the result from the Kuroshio’s period oscillation and the topograph

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van Westen, René M., and Henk A. Dijkstra. "Ocean eddies strongly affect global mean sea-level projections." Science Advances 7, no. 15 (2021): eabf1674. http://dx.doi.org/10.1126/sciadv.abf1674.

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Current sea-level projections are based on climate models in which the effects of ocean eddies are parameterized. Here, we investigate the effect of ocean eddies on global mean sea-level rise (GMSLR) projections, using climate model simulations. Explicitly resolving ocean eddies leads to a more realistic Southern Ocean temperature distribution and volume transport. These quantities control the rate of basal melt, which eventually results in Antarctic mass loss. In a model with resolved ocean eddies, the Southern Ocean temperature changes lead to a smaller Antarctic GMSLR contribution compared

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Jones-Kellett, Alexandra E., and Michael J. Follows. "A Lagrangian coherent eddy atlas for biogeochemical applications in the North Pacific Subtropical Gyre." Earth System Science Data 16, no. 3 (2024): 1475–501. http://dx.doi.org/10.5194/essd-16-1475-2024.

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Abstract. Mesoscale eddies affect phytoplankton in several ways, including the horizontal dispersal and mixing of populations. Coherent eddies trap and contain fluid masses, whereas other eddies mix more freely with surrounding waters. To evaluate the role of lateral dispersal and trapping on the biogeochemical properties of eddies, we must accurately characterize their coherency. We employed a Lagrangian approach to identify materially coherent structures in remote sensing observations and developed a methodology to track them over their entire individual lifetimes. We provide an atlas of two

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Callendar, W., J. M. Klymak, and M. G. G. Foreman. "Tidal generation of large sub-mesoscale eddy dipoles." Ocean Science 7, no. 4 (2011): 487–502. http://dx.doi.org/10.5194/os-7-487-2011.

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Abstract. Numerical simulations of tidal flow past Cape St. James on the south tip of Haida Gwaii (Queen Charlotte Islands) are presented that indicate mesoscale dipoles are formed from coalescing tidal eddies. Observations in this region demonstrate robust eddy generation at the Cape, with the primary process being flow separation of buoyant or wind driven outflows forming large anti-cyclonic, negative potential vorticity, Haida Eddies. However, there are other times where dipoles are observed in satellites, indicating a source of positive potential vorticity must also be present. The simulat

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Callendar, W., J. M. Klymak, and M. G. G. Foreman. "Tidal generation of large sub-mesoscale eddy dipoles." Ocean Science Discussions 8, no. 2 (2011): 723–60. http://dx.doi.org/10.5194/osd-8-723-2011.

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Abstract. Numerical simulations of tidal flow past Cape St. James on the south tip of Haida Gwai (Queen Charlotte Islands) are presented that indicate mesoscale dipoles are formed from coalescing tidal eddies. Observations in this region demonstrate robust eddy generation at the Cape, with the primary process being flow separation of buoyant or wind driven outflows forming large anti-cyclonic, negative potential vorticity, Haida Eddies. However, there are other times where dipoles are observed in satellites, indicating a source of positive potential vorticity must also be present. The simulati

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Rocha, Cesar B., and Iury T. Simoes-Sousa. "Compact Mesoscale Eddies in the South Brazil Bight." Remote Sensing 14, no. 22 (2022): 5781. http://dx.doi.org/10.3390/rs14225781.

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Recent studies suggest that the South Brazil Bight (SBB) hosts strong westward propagating mesoscale eddies. We use 28 years of satellite altimetry data and a new Eddy Atlas to estimate how much of the eddy kinetic energy (EKE) observed in the SBB is accounted for by local eddies, generated in the Brazil Current (BC) region, versus remote eddies generated eastward of the BC region. First, we estimate a BC frontal density to obtain a robust definition of BC region. The BC front is well-defined throughout the SBB, occupying the region between the 200-m and 1000-m isobath, except in eddy hotspots

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