气候变化领域集成服务门户(CCPortal): Glacial fluctuations in tropical Africa during the last glacial termination and implications for tropical climate following the Last Glacial Maximum

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DOI	10.1016/j.quascirev.2020.106455
	Glacial fluctuations in tropical Africa during the last glacial termination and implications for tropical climate following the Last Glacial Maximum
	Jackson M.S.; Kelly M.A.; Russell J.M.; Doughty A.M.; Howley J.A.; Chipman J.W.; Cavagnaro D.A.; Baber M.B.; Zimmerman S.R.H.; Nakileza B.
发表日期	2020
ISSN	0277-3791
卷号	243
英文摘要	The tropics are a dynamic component of the global climate system and exert a profound influence on modern climate variability. Yet the role of the tropics in past climate changes, for example during the last glacial termination, is uncertain. This uncertainty is due in part to the relative paucity of terrestrial temperature records from the tropics, which hinders efforts to understand the mechanisms that influenced deglacial warming and abrupt climate events. Tropical glaciers are sensitive to changes in climate, and mapping and dating past tropical glacial fluctuations provides a valuable record of terrestrial climate changes in the low latitudes. We report a chronology of past glacial extents in the Rwenzori Mountains of Uganda (0.3°N, 29.9°E) based on 51 beryllium-10 (10Be) surface-exposure ages from three separate glacial catchments. Results indicate that Rwenzori glaciers retreated considerably during Heinrich Stadial 1. The rate of net glacial recession slowed between ∼15 and 11 ka, although glaciers continued to retreat during this period. Rwenzori glaciers then retreated more rapidly during the early Holocene. The Rwenzori glacial chronology is broadly similar to glacial chronologies reconstructed elsewhere in East Africa and in tropical South America. We suggest that this similarity may reflect coherent, tropics-wide temperature fluctuations during the last deglaciation. The Rwenzori glacial chronology provides crucial information on the global footprint of deglacial warming and abrupt climate events and, thus, the potential mechanisms that influenced tropical climate during the last glacial termination. © 2020 Elsevier Ltd
英文关键词	Africa; Cosmogenic isotopes; Glacial geomorphology; Paleoclimatology
语种	英语
scopus关键词	Catchments; Glacial geology; Mapping; Tropics; Climate variability; Glacial chronology; Global climate system; Last Glacial Maximum; Last glacial terminations; Potential mechanism; Surface exposure age; Temperature fluctuation; Climate change; chronology; climate change; climate variation; global climate; Holocene; Last Glacial Maximum; mountain region; tropical environment; Rwenzori Mountains; South America
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151375
作者单位	Department of Earth Sciences, Fairchild Hall, Dartmouth College, Hanover, NH 03755, United States; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, United States; Geology Department, Carnegie Hall, Bates College, Lewiston, ME 04240, United States; New Hampshire Department of Health and Human Services, Concord, NH 03301, United States; Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA 94550, United States; Mountain Resource Centre, Makerere University, Kampala, Uganda
推荐引用方式 GB/T 7714	Jackson M.S.,Kelly M.A.,Russell J.M.,et al. Glacial fluctuations in tropical Africa during the last glacial termination and implications for tropical climate following the Last Glacial Maximum[J],2020,243.
APA	Jackson M.S..,Kelly M.A..,Russell J.M..,Doughty A.M..,Howley J.A..,...&Nakileza B..(2020).Glacial fluctuations in tropical Africa during the last glacial termination and implications for tropical climate following the Last Glacial Maximum.Quaternary Science Reviews,243.
MLA	Jackson M.S.,et al."Glacial fluctuations in tropical Africa during the last glacial termination and implications for tropical climate following the Last Glacial Maximum".Quaternary Science Reviews 243(2020).