Relevant bibliographies by topics / Holocene Climatic Optimum

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Academic literature on the topic 'Holocene Climatic Optimum'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Holocene Climatic Optimum"

1

He, Y., Wilfred H. Theakstone, Zhang Zhonglin, et al. "Asynchronous Holocene climatic change across China." Quaternary Research 61, no. 1 (2004): 52–63. http://dx.doi.org/10.1016/j.yqres.2003.08.004.

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A review of Holocene climatic variations in different parts of China shows that they were asynchronous. Proxy data from ice cores, pollen, loess, lacustrine sediments, and changes of sea and lake levels demonstrate that many warm and cold oscillations have occurred in China during the Holocene, including a most important climatic event known as the “Holocene optimum,” a milder and wetter period, and that the duration and amplitude of the optimum period, as well as its start and end times, differed in different parts of China. Uplift of the Tibetan plateau over the past millions of years led to the development of the monsoon climate and to complex atmospheric circulation over continental China during the Holocene. As a result, the Holocene optimum began and terminated earlier in high-altitude regions of western China than at lower elevations in eastern China, and the amplitude of the variations was lower in the east. This suggests that the western higher-altitude areas were more sensitive to climatic change than were the eastern lower-altitude areas. Holocene climatic records in the Dunde and Guliya ice cores do not correspond. Inverse δ18O variations between the two cores indicate that the effects of climate and atmospheric processes on the stable isotopes at the two sites differed. The correlation between the isotopic composition of carbonates in lake deposits in western China and climatic variations is similar to that in the ice cores. The climatic resolution in ice cores and lake sediments is higher than that in other media. The lack of precise correspondence of climatic records constructed on the basis of proxy data from different parts of China is a result of the different locations and elevations of the sampling sites, the different resolutions of the source material, and the varied climatic conditions within China. Further work is needed to confirm both the conclusions and the inferences presented here.
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2

Weidick, A. "Jakobshavn Isbræ area during the climatic optimum." Rapport Grønlands Geologiske Undersøgelse 155 (January 1, 1992): 67–72. http://dx.doi.org/10.34194/rapggu.v155.8183.

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The GGU glaciological investigations related to hydropower planning north (Pakitsoq) and south (Tiningnilik) of Jakobshavn Isbræ have, together with finds and dating of marine subfossils, furnished information on the history of the ice margin changes during and since the Holocene climatic optimum. The paper attempts to reconstruct the ice margin conditions and surroundings during the Holocene climatic optimum on the basis of this information.
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3

NIELSEN, LISBETH T., GUðFINNA AÐALGEIRSDÓTTIR, VASILEIOS GKINIS, ROMAN NUTERMAN, and CHRISTINE S. HVIDBERG. "The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr." Journal of Glaciology 64, no. 245 (2018): 477–88. http://dx.doi.org/10.1017/jog.2018.40.

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ABSTRACTThe Holocene climatic optimum was a period 8–5 kyr ago when annual mean surface temperatures in Greenland were 2–3°C warmer than present-day values. However, this warming left little imprint on commonly used temperature proxies often used to derive the climate forcing for simulations of the past evolution of the Greenland ice sheet. In this study, we investigate the evolution of the Greenland ice sheet through the Holocene when forced by different proxy-derived temperature histories from ice core records, focusing on the effect of sustained higher surface temperatures during the early Holocene. We find that the ice sheet retreats to a minimum volume of ~0.15–1.2 m sea-level equivalent smaller than present in the early or mid-Holocene when forcing an ice-sheet model with temperature reconstructions that contain a climatic optimum, and that the ice sheet has continued to recover from this minimum up to present day. Reconstructions without a warm climatic optimum in the early Holocene result in smaller ice losses continuing throughout the last 10 kyr. For all the simulated ice-sheet histories, the ice sheet is approaching a steady state at the end of the 20th century.
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4

Yang, Xunlin, Hong Yang, Baoyan Wang, et al. "Early-Holocene monsoon instability and climatic optimum recorded by Chinese stalagmites." Holocene 29, no. 6 (2019): 1059–67. http://dx.doi.org/10.1177/0959683619831433.

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The timing and duration of the Holocene East Asian summer monsoon (EASM) maximum and the interpretation of Chinese stalagmite δ18O records have long been disputed. Notably, interpretations of Holocene EASM variations are frequently based on a single record or study area and are often contradictory. In this study, we conducted stable isotope analyses of four Holocene stalagmites from Chongqing, southwest China. The results reveal differences in the timing of the Holocene EASM maximum and to try to resolve the inconsistency we analyzed and statistically integrated a total of 16 Holocene stalagmite records from 14 caves in the EASM region. The resulting synthesized Holocene stalagmite δ18O (δ18Osyn) record is in agreement with other EASM records and confirms that stalagmite δ18O records are a valid indicator of EASM intensity, rather of local precipitation amount. The δ18Osyn record shows that the EASM intensified rapidly from the onset of the early Holocene; notably, however, there were distinct EASM oscillations in the early Holocene, consisting of three abrupt millennial-scale events. This indicates that, contrary to several previous interpretations, the early Holocene EASM was unstable. Subsequently, during 8–6 kyr BP, the EASM was relatively stable and strong, with the strongest monsoon occurring during 8–7 kyr BP. This evidence of a stable and strong mid-Holocene EASM in eastern China is in accord with the classical view of a mid-Holocene Optimum in China.
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5

Jin, Zhang-Dong, Yanhong Wu, Xiaohui Zhang, and Sumin Wang. "Role of late glacial to mid-Holocene climate in catchment weathering in the central Tibetan Plateau." Quaternary Research 63, no. 2 (2005): 161–70. http://dx.doi.org/10.1016/j.yqres.2004.09.012.

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The lightness (L*) and concentrations of Rb, Sr and organic carbon (Corg) have been measured in the age-constrained lake sediment cores recovered from Co Ngoin in the central Tibetan Plateau. Dissolved Sr flux is a dominant control on the variation of Rb/Sr ratios in the sediments. Variations in color and geochemical proxies of Co Ngoin sediments display a continuous history of late glacial to mid-Holocene chemical versus physical weathering intensity in response to past climatic changes between approximately 13,500 and 4500 cal yr B.P. A lower chemical weathering under a late glacial climate was followed by a higher weathering during the Holocene Optimum. Weathering intensity in the central Tibetan Plateau catchment also responds to well-known climatic events, such as the Younger Dryas (YD), and possibly the Holocene Event 5 (HE-5). Although there are differences in time or duration of the climatic events, many of the well-known late glacial to mid-Holocene events occurred in high-elevation Co Ngoin where atmospheric circulation might play a hemispherical role in climatic forcing. The sediment hiatus since c. 4200 14C yr B.P. in the Co Ngoin indicates a period of desiccation that was probably associated with a sharp decrease in summer monsoon strength. Our lascustrine results not only imply catchment weathering variations in response to late glacial to mid-Holocene climatic conditions in the central plateau, but also provide further evidence for global connections between regional climates.
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6

Zhang, Jingwei, Xinggong Kong, Kan Zhao, et al. "Centennial-scale climatic changes in Central China during the Holocene climatic optimum." Palaeogeography, Palaeoclimatology, Palaeoecology 558 (November 2020): 109950. http://dx.doi.org/10.1016/j.palaeo.2020.109950.

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7

Nazarova, L. B., N. G. Razjigaeva, B. Diekmann, et al. "Reconstruction holocene environmental changes in North-Western Pacific in relation to paleorecord from Shikotan Island." Доклады Академии наук 486, no. 2 (2019): 212–16. http://dx.doi.org/10.31857/s0869-56524862212-216.

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Results of a paleolimnological investigated of a well-dated lake sediment section from Shikotan Island (Southern Kurils) showed that from ca 8.0 to 5.8 cal ka BP warm and humid period corresponding to middle Holocene optimum took place. Cooling thereafter corresponds to Neoglacial. A reconstructed from ca 0.9 to ca 0.58 cal ka BP warm period can be correlated to a Medieval Warm Period. Cooling after 0.58 cal ka BP can be correlated with the LIA. Marine regression stages were identified at ca 6.2-5.9, 5.5-5.1 and 1.07-0.36 cal ka BP. The general chronology of major climatic events of Holocene in the island is in accordance with the climate records from the North Pacific region. Revealed spatial differences in timing and magnitude of the Late Holocene climatic episodes (LIA, MWP) within region needs further investigations.
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8

Janz, Lisa, Arlene M. Rosen, Dashzeveg Bukhchuluun, and Davaakhuu Odsuren. "Zaraa Uul: An archaeological record of Pleistocene-Holocene palaeoecology in the Gobi Desert." PLOS ONE 16, no. 4 (2021): e0249848. http://dx.doi.org/10.1371/journal.pone.0249848.

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Environmentally-based archaeological research at Zaraa Uul, including zooarchaeology, phytolith analysis, and radiocarbon dating, is the first of its kind in Mongolia and presents critical new insight on the relationship between periods of occupational intensity and climatic amelioration from the earliest anatomically modern humans to the adoption of pastoralism. The palaeoenvironmental and faunal record of Zaraa Uul show that Early-Middle Holocene hydrology and species distributions were distinct from all other periods of human occupation. Holocene hunter-gatherers inhabited an ecosystem characterized by extensive marshes, riparian shrub and arboreal vegetation along the hill slopes and drainages. The exploitation of species associated with riparian and wetland settings supports the hypothesis of, but suggests an earlier timing for, oasis-based logistical foraging during the Early-Middle Holocene of arid Northeast Asia. The onset of wetter conditions at 8500 cal BP agrees with other regional studies, but multiple lines of evidence present the first integrated field- and laboratory-based record of human-environment relationships in arid East Asia during the Holocene Climatic Optimum. We compare it to Late Pleistocene climatic amelioration, and highlight specific responses of the hydrological, vegetative and faunal communities to climate change in arid Northeast Asia.
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9

Nahm, Wook-Hyun, Jin Kwan Kim, Ju-Yong Kim, Sangheon Yi, Jaesoo Lim, and Jin Cheul Kim. "The Holocene climatic optimum in Korea: Evidence from wetland records." Palaeogeography, Palaeoclimatology, Palaeoecology 376 (April 2013): 163–71. http://dx.doi.org/10.1016/j.palaeo.2013.02.033.

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10

Baroni, Carlo, and Giuseppe Orombelli. "The Alpine “Iceman” and Holocene Climatic Change." Quaternary Research 46, no. 1 (1996): 78–83. http://dx.doi.org/10.1006/qres.1996.0046.

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The finding of a prehistoric mummified corpse at the upper edge of the accumulation area of an alpine glacier, together with its unique set of artifacts, provided new information on glacier dimensions during the little-known phases of major glacier shrinkage that characterized the warmest parts of the Holocene. The sudden burial of the corpse in a permanent snow cover occurred 5300–5050 cal yr B.P., indicating a significant climatic change that induced glacier expansion at the beginning of Neoglaciation. New geomorphologic data and two AMS 14C ages from buried soils suggest that the present glacier size, following over 100 yr of shrinkage, is comparable to that immediately preceding Neoglaciation. Therefore, we can deduce that the current global climatic warming may have interrupted the environmental conditions prevailing in the Alps during Neoglacial time, restoring characteristics similar to those prevailing during the climatic optimum that were never achieved during the second half of the Holocene.
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