Academic literature on the topic 'Cold advection'

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Journal articles on the topic "Cold advection"

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Portis, Diane H., Michael P. Cellitti, William L. Chapman, and John E. Walsh. "Low-Frequency Variability and Evolution of North American Cold Air Outbreaks." Monthly Weather Review 134, no. 2 (2006): 579–97. http://dx.doi.org/10.1175/mwr3083.1.

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Abstract Hourly data from 17 relatively evenly distributed stations east of the Rocky Mountains during 54 winter seasons (1948/49 through 2001/02) are used to evaluate the low-frequency variability of extreme cold air outbreaks (CAOs). The results show no overall trend in CAO frequency, despite an increase in mean temperature over the Midwest and especially upstream into the CAO formation regions of high-latitude North America. However, there are regionally based trends in the intensity of long-duration (5 day) CAOs. Daily heat budgets from reanalysis data are also used to investigate the ther
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Su, Jingzhi, Renhe Zhang, Tim Li, Xinyao Rong, J.-S. Kug, and Chi-Cherng Hong. "Causes of the El Niño and La Niña Amplitude Asymmetry in the Equatorial Eastern Pacific." Journal of Climate 23, no. 3 (2010): 605–17. http://dx.doi.org/10.1175/2009jcli2894.1.

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Abstract The amplitude asymmetry between El Niño and La Niña is investigated by diagnosing the mixed-layer heat budget during the ENSO developing phase by using the three ocean assimilation products: Simple Ocean Data Assimilation (SODA) 2.0.2, SODA 1.4.2, and the Global Ocean Data Assimilation System (GODAS). It is found that the nonlinear zonal and meridional ocean temperature advections are essential to cause the asymmetry in the far eastern Pacific, whereas the vertical nonlinear advection has the opposite effect. The zonal current anomaly is dominated by the geostrophic current in associa
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Menkes, Christophe E. R., Jérôme G. Vialard, Sean C. Kennan, Jean-Philippe Boulanger, and Gurvan V. Madec. "A Modeling Study of the Impact of Tropical Instability Waves on the Heat Budget of the Eastern Equatorial Pacific." Journal of Physical Oceanography 36, no. 5 (2006): 847–65. http://dx.doi.org/10.1175/jpo2904.1.

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Abstract A numerical simulation is used to investigate the mixed layer heat balance of the tropical Pacific Ocean including the equatorial cold tongue and the region of vortices associated with tropical instability waves (TIWs). The study is motivated by a need to quantify the effects that TIWs have on the climatological heat budget of the cold tongue mixed layer; there has been some discrepancy between observations indicating very large equatorward heat transport by TIWs and models that disagree on the full three-dimensional budget. Validation of the model reveals that the TIW-induced circula
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Huang, Huijun, Hongnian Liu, Jian Huang, Weikang Mao, and Xueyan Bi. "Atmospheric Boundary Layer Structure and Turbulence during Sea Fog on the Southern China Coast." Monthly Weather Review 143, no. 5 (2015): 1907–23. http://dx.doi.org/10.1175/mwr-d-14-00207.1.

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Abstract Small-scale turbulence has an essential role in sea-fog formation and evolution, but is not completely understood. This study analyzes measurements of the small-scale turbulence, together with the boundary layer structure and the synoptic and mesoscale conditions over the life cycle of a cold advection fog event and a warm advection fog event, both off the coast of southern China. The measurement data come from two sites: one on the coast and one at sea. These findings include the following: 1) For cold advection fog, the top can extend above the inversion base, but formation of an ov
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Xie, Zhixing, and Bo Sun. "Different Roles of Water Vapor Transport and Cold Advection in the Intensive Snowfall Events over North China and the Yangtze River Valley." Atmosphere 10, no. 7 (2019): 368. http://dx.doi.org/10.3390/atmos10070368.

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Intensive snowfall events (ISEs) have a profound impact on the society and economy in China during winter. Considering that the interaction between northerly cold advection and southerly water vapor transport (WVT) is generally an essential condition for the occurrence of ISEs in eastern China, this study investigates the different roles of anomalous southerly WVT and northerly cold advection during the ISEs in the North China (NC) and Yangtze River valley (YRV) regions based on a composite analysis of seventy ISE cases in NC and forty ISE cases in the YRV region from 1961 to 2014. The results
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Wang, Shi-Xin, Hong-Chao Zuo, Fen Sun, Li-Yang Wu, Yixing Yin, and Jing-Jia Luo. "Dynamics of East Asian Spring Rainband and Spring–Autumn Contrast: Environmental Forcings of Large-Scale Circulation." Journal of Climate 34, no. 9 (2021): 3523–41. http://dx.doi.org/10.1175/jcli-d-20-0501.1.

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AbstractDynamics of the East Asian spring rainband are investigated with a reanalysis dataset and station observations. Here, it is revealed that the rainband is anchored by external forcings. The midtropospheric jet core stays quasi-stationary around Japan. It has two branches in its entry region, which originate from the south and north flanks of the Tibetan Plateau and then run northeastward and southeastward, respectively. The southern branch advects warm air from the Tibetan–Hengduan Plateau northeastward, forming a rainband over southern China through causing adiabatic ascent motion and
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Pang, Bo, and Riyu Lu. "Two Distinct Types of Extratropical Circulation Anomalies Associated with Cold Surges over the South China Sea." Journal of Climate 32, no. 16 (2019): 5069–84. http://dx.doi.org/10.1175/jcli-d-19-0041.1.

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Abstract This study investigated the extratropical circulation anomalies responsible for cold surges over the South China Sea in winter. The surge events were identified by the intensity of northerly winds over 110°–117.5°E along 15°N at 925 hPa. Two distinct patterns of sea level pressure (SLP) anomalies in East Asia were found to have a crucial role in inducing cold surges over the South China Sea. Accordingly, the cold surge events were classified into two types. The first type of cold surge is characterized by a pair of SLP anomalies with positive and negative ones centered over China and
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Mansbach, David K., and Joel R. Norris. "Low-Level Cloud Variability over the Equatorial Cold Tongue in Observations and Models." Journal of Climate 20, no. 8 (2007): 1555–70. http://dx.doi.org/10.1175/jcli4073.1.

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Abstract Examination of cloud and meteorological observations from satellite, surface, and reanalysis datasets indicates that monthly anomalies in low-level cloud amount and near-surface temperature advection are strongly negatively correlated on the southern side of the equatorial Pacific cold tongue. This inverse correlation occurs independently of relationships between cloud amount and sea surface temperature (SST) or lower tropospheric static stability (LTS), and the combination of advection plus SST or LTS explains significantly more interannual cloud variability in a multilinear regressi
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You, C. H., D. I. Lee, S. M. Jang, M. Jang, H. Uyeda, and T. Shinoda. "Characteristics of precipitation system accompanied with Changma front at Chujado, Korea, 5 to 6 July in 2007." Hydrology and Earth System Sciences Discussions 6, no. 2 (2009): 1523–50. http://dx.doi.org/10.5194/hessd-6-1523-2009.

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Abstract. The rainy season from June to July in the East Asia is called as the Changma in Korea, the Meiyu in China, or the Baiu in Japan. The mesoscale convective systems which occur near a front frequently lead to severe weather phenomenon such as localized gust and heavy rainfall. An intensive field experiment was conducted at Chujado (33.95° N, 126.28° E) to characterize the precipitating system and the size distribution during a Changma period between 21 June 2007 and 11 July 2007. The precipitation system caused heavy rainfalls in Chujado for 20 h and three identified rainfall cases were
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Thurnherr, Iris, Katharina Hartmuth, Lukas Jansing, et al. "The role of air–sea fluxes for the water vapour isotope signals in the cold and warm sectors of extratropical cyclones over the Southern Ocean." Weather and Climate Dynamics 2, no. 2 (2021): 331–57. http://dx.doi.org/10.5194/wcd-2-331-2021.

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Abstract. Meridional atmospheric transport is an important process in the climate system and has implications for the availability of heat and moisture at high latitudes. Near-surface cold and warm temperature advection over the ocean in the context of extratropical cyclones additionally leads to important air–sea exchange. In this paper, we investigate the impact of these air–sea fluxes on the stable water isotope (SWI) composition of water vapour in the Southern Ocean's atmospheric boundary layer. SWIs serve as a tool to trace phase change processes involved in the atmospheric water cycle an
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Dissertations / Theses on the topic "Cold advection"

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Roberts, Kelsey. "Weather patterns associated with green turtle hypothermic stunning events in St. Joseph Bay and Mosquito Lagoon, Florida." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4836.

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January of 2010 brought record-breaking cold temperatures to Florida. Such freeze events can upset vulnerable populations of marine life and other species that rely on stable water temperatures. Sea turtles are one group of species that are particularly susceptible to abrupt drops in water temperature. When water temperatures drop below 10°C, a mass hypothermic stunning, or cold-stunning, event for sea turtles can be expected, with many debilitated turtles washing onshore with a very limited time window to be rehabilitated (Foley et al. 2007). The species of sea turtle that appears to cold-stu
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Long, Danielle Marie. "The Role of Retention Time and Soil Depth on the Survival and Transport of Escherichia coli and Enterococcus spp. in Biosolid-amended Agricultural soil." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1388411251.

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Book chapters on the topic "Cold advection"

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Xu, Liu-Jun, and Ji-Ping Huang. "Theory for Diffusive Fizeau Drag: Willis Coupling." In Transformation Thermotics and Extended Theories. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-5908-0_15.

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AbstractIn this chapter, we design a spatiotemporal thermal metamaterial based on heat transfer in porous media to demonstrate the diffusive analog to Fizeau drag. The space-related inhomogeneity and time-related advection enable the diffusive Fizeau drag effect. Thanks to the spatiotemporal coupling, different propagating speeds of temperature fields can be observed in two opposite directions, thus facilitating nonreciprocal thermal profiles. The phenomenon of diffusive Fizeau drag stands robustly even when the advection direction is perpendicular to the propagation of temperature fields. These results could pave an unexpected way toward realizing the nonreciprocal and directional transport of mass and energy.
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Conference papers on the topic "Cold advection"

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Tonellato, Giulio, Michaël Kummert, José Candanedo, Gabrielle Beaudry, and Philippe Pasquier. "An exploration of a heuristic predictive control strategy for ground source heat pumps coupled to standing column wells." In International Ground Source Heat Pump Association. International Ground Source Heat Pump Association, 2024. http://dx.doi.org/10.22488/okstate.24.000033.

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Standing column wells (SCW) have shown to be a cost-effective hybrid ground heat exchanger (GHE) configuration suitable for high-density urban areas as they benefit from groundwater advection while not requiring particularly productive aquifers. However, operating SCWs in cold climates can represent a control challenge since the groundwater can approach freezing conditions while recirculating; on the other hand, submersible pumps can cause a significant power usage. This article explores the potential of a heuristic predictive pumping control strategy built with an accurately calibrated white-
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Kitazawa, Daisuke, Satoshi Abe, Fujihiro Hamba, and Shinsuke Kato. "Reverse Simulation for Specifying the Source of Pollutants in Waters." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-50144.

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Reverse simulation was carried out to specify the point source of pollutants in closed waters. If pollutants flow out into waters, their source must be specified as soon as possible to take a quick measure against the pollution problem. Actually, a wide variety of pollutants have been released into the aquatic environment, some with catastrophic consequences for aquatic life or man. Numerical simulation is one of the powerful tools to specify the point source of pollutants. An inverse trajectory analysis has been used in the case when an advective process of pollutants is dominant. However, th
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Ortega, Alfonso, Carol Caceres, Umut Uras, et al. "Determination of the Thermal Performance Limits for Single Phase Liquid Cooling Using an Improved Effectiveness-NTU Cold Plate Model." In ASME 2022 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/ipack2022-97421.

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Abstract Cold plates are at the heart of pumped liquid cooling systems. In this paper, we report on combined experimental, analytical, and computational efforts to characterize and model the thermal performance of advanced cold plates in order to establish their performance limits. A novel effectiveness-NTU formulation is introduced that models the fin array as a secondary “pseudo-fluid” such that accurate crossflow effectiveness models can be utilized to model the cold plates using well-known formulations. Experimental measurements and conjugate CFD simulations were made on cold plates with f
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Kino, Chiaki, Tomoaki Kunugi, and Zensaku Kawara. "Numerical Simulation on Heat Transfer of Falling Film Flow Along a Vertical Wall." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32002.

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Numerical simulations based on the MARS (Multi-interface Advection and Reconstruction Solver) developed by one of the authors have been performed in order to understand the heat transfer mechanism of falling film flows along a vertical wall. In the present study, we focused on an internal structure, i.e. velocity profile and heat transfer. In this study, the velocity profiles in a falling film are categorized into three regions: substrate film region, solitary wave region, and capillary wave region with each characteristic. Moreover, small vortices can be found in the capillary wave region. Ad
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Zirkel, Armin, Guido Doebbener, and Eckart Laurien. "CFD Simulation of Forced Flow Within the THAI Model Containment." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75070.

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This paper presents the current state of an ongoing analysis and validation of turbulence models for three dimensional numerical simulations (CFD-simulations) within containments of nuclear reactors. A severe accident flow inside a containment could be caused by a leak in the primary circuit of the reactor. It is characterized by different velocities, mass transport, the anisotropy and time dependency of the turbulence field as well as the transition between laminar and turbulent flows. Another issue is the complex geometry of a containment with different rooms and obstacles. The analysis is u
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Prvakova, Slavka, Adela Mrskova, and Jozef Pritrsky. "Influence of the Conditional Release of the Materials With Very Low Level of Radioactivity on the Environment." In ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2011. http://dx.doi.org/10.1115/icem2011-59132.

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Significant amount of solid materials (metals, non-metals, building structures) that could be contaminated or activated is produced during operation and especially decommissioning of nuclear power plants. Considerable fraction of these materials has level of radioactivity close to the radiological limits allowing its safe release into the environment thereby could be potentially recycled within the special constructions, as for example tunnels, roads or bridges. If the requirements of legislation on the radiological limits for handling such material and long-term safety of the constructions ar
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Chen, S., T. Sato, Y. Sawano, and K. Tada. "Numerical Simulation of CO2 Hydrate Formation in Subsea Sand When Salinity is Considered." In Offshore Technology Conference. OTC, 2025. https://doi.org/10.4043/35714-ms.

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Abstract The objective of this study is to develop a mathematical CO2 phase equilibrium model for saline condition to integrate its effects within the numerical simulation framework for CO2 hydrate formation in undersea sand layers at the reservoir scale. Also, we evaluate the potential of CO2 hydrate storage under saline conditions for practical requirements. A salinity-dependent phase equilibrium curve for CO2 hydrate was created by fitting the experimental results of previous studies in the literature. An advection-diffusion equation solver was added in the reservoir-scale simulation method
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Alavi, S., M. Passandideh-Fard, and M. H. Tafteh. "Electrowetting Actuation for a Sessile Liquid Drop: Experiments and Simulations." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58197.

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In this paper, experiments and numerical simulations are performed to study the effects of electric field on the contact angle of a sessile liquid drop resting on a substrate in electrowetting-on-dielectric (EWOD) application. In the experiments for studying the electrowetting, a mercury droplet of 20μL was dispensed manually on a soldermask-coated PCB (Printed Circuit Board) and different values of AC voltage were applied between the droplet and the insulator. High quality images were captured using a CCD camera in all experiments and a program was developed using the MATLAB software for imag
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Hao, J., Y. J. Lin, and Y. Nie. "CFD Multiphase Flow Modelling of Air Porosity Defect Formation During High-Pressure Die-Casting Filling Process." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51051.

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High-Pressure Die-Casting (HPDC) is an important process for manufacturing high-volume and low-cost components. In this process molten metal is injected at high speed under high pressure into the die cavity, which often leads to entrapment of air into the liquid metal. This will cause air porosity after solidification, the main defect in the parts made by HPDC. The aim of this work was to develop a CFD multiphase flow simulation method to numerically study the air porosity defect formation in HPDC. Some numerical models have been developed to predict the air porosity defect in HPDC. However, m
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Menzer, Alec, Menglong Lei, Chengyu Li, and Haibo Dong. "A Multiphysics Approach to Understanding Chemoreception in Bio-Robotic Fish Schools." In ASME 2023 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/imece2023-114543.

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Abstract By performing numerical simulations of the governing fluids and odorant transport equations, this study identified a relationship between the hydrodynamic interactions and olfactory chemoreception in a fish-like school. Simulations were performed using an in-house developed immersed-boundary method based incompressible Navier-Stokes flow solver coupled with the odorant advection-diffusion equation. From a hydrodynamic performance perspective, it was found that the drag of a trailing fish in a synchronous school could be reduced by up to 18% (relative to an in-line school) by introduci
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Reports on the topic "Cold advection"

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Simulation of advective flow under steady-state and transient recharge conditions, Camp Edwards, Massachusetts Military Reservation, Cape Cod, Massachusetts. US Geological Survey, 2003. http://dx.doi.org/10.3133/wri034053.

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