气候变化领域集成服务门户(CCPortal): Late Holocene hydroclimate variability in Costa Rica: Signature of the terminal classic drought and the Medieval Climate Anomaly in the northern tropical Americas

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DOI	10.1016/j.quascirev.2019.04.023
	Late Holocene hydroclimate variability in Costa Rica: Signature of the terminal classic drought and the Medieval Climate Anomaly in the northern tropical Americas
	Wu J.; Porinchu D.F.; Horn S.P.
发表日期	2019
ISSN	0277-3791
起始页码	144
结束页码	159
卷号	215
英文摘要	In the northern tropical Americas (Neotropics), notable hydrological variability has been documented in multi-proxy paleoclimate records between ∼600 and 1200 CE. This interval generally overlaps with the Maya Terminal Classic Drought (TCD: ∼770–1100 CE) and the Medieval Climate Anomaly (MCA: ∼950–1250 CE). There is, however, limited paleoclimate data that provide reliable estimates of terrestrial thermal variability in southern Central America during this time. In this study, we present chironomid-based temperature reconstructions, developed from sediment cores from two lakes: (1) Lago Morrenas 3C, a high-elevation glacial lake located on the crest of the Atlantic slope of the Cordillera Talamanca, Costa Rica, and (2) Laguna Zoncho, a mid-elevation lake located on the Pacific slope in southern Costa Rica. Distinctive shifts in the chironomid assemblages occurred at both sites between ∼610 and 1230 CE. These changes are inferred to reflect an ∼600-year interval characterized by depressed mean annual temperatures at Lago Morrenas 3C and dry conditions and lake level decline at Laguna Zoncho. Taken together, the multi-proxy paleoclimate records from these two lakes, including stable carbon isotope (δ13C) and charcoal data, suggest that middle elevations on the Pacific slope and high elevations on the Atlantic slope of Costa Rica experienced sustained drought, and possible cooling coeval with the TCD-MCA interval. The timing of hydroclimate variability in these records provides support for the hypothesis that cooling and drought in the northern tropical Americas during the TCD and early MCA were linked to thermal changes in the tropical North Atlantic. © 2019 Elsevier Ltd
英文关键词	Chironomids; Climatic mechanism; Drought; Global change; Lago morrenas 3C; Laguna zoncho; Paleoclimate; Thermal reconstruction; Tropical americas; Tropical north atlantic
语种	英语
scopus关键词	Charcoal; Lakes; Tropics; Chironomids; Global change; Laguna zoncho; North Atlantic; Paleoclimates; Thermal reconstruction; Tropical americas; Drought; carbon isotope; charcoal; climate variation; cooling; drought; fly; glacial lake; global change; Holocene; hydrological change; hydrometeorology; lake level; Medieval Warm Period; paleoclimate; reconstruction; temperature effect; temperature gradient; Atlantic Ocean; Atlantic Ocean (North); Central America; Costa Rica; Limon; Talamanca; Chironomidae
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/151907
作者单位	Department of Geography, University of Georgia, Athens, GA 30602, United States; Department of Geography, University of Tennessee, Knoxville, TN 37996, United States
推荐引用方式 GB/T 7714	Wu J.,Porinchu D.F.,Horn S.P.. Late Holocene hydroclimate variability in Costa Rica: Signature of the terminal classic drought and the Medieval Climate Anomaly in the northern tropical Americas[J],2019,215.
APA	Wu J.,Porinchu D.F.,&Horn S.P..(2019).Late Holocene hydroclimate variability in Costa Rica: Signature of the terminal classic drought and the Medieval Climate Anomaly in the northern tropical Americas.Quaternary Science Reviews,215.
MLA	Wu J.,et al."Late Holocene hydroclimate variability in Costa Rica: Signature of the terminal classic drought and the Medieval Climate Anomaly in the northern tropical Americas".Quaternary Science Reviews 215(2019).