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Titolo:
Terrestrial evidence for a spatial structure of tropical-polar interconnections during the Younger Dryas episode
Autore:
Zhou, WJ; Head, MJ; An, ZS; De Deckker, P; Liu, ZY; Liu, XD; Lu, XF; Donahue, D; Jull, AJT; Beck, JW;
Indirizzi:
Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710054, Peoples R China Chinese Acad Sci Xian Peoples R China 710054 ian 710054, Peoples R China Australian Natl Univ, Fac Sci, Dept Geol, Canberra, ACT 0200, Australia Australian Natl Univ Canberra ACT Australia 0200 rra, ACT 0200, Australia Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI 53706 USA Univ Wisconsin Madison WI USA 53706 er & Ocean Sci, Madison, WI 53706 USA Univ Arizona, NSF Arizona AMS Facil, Tucson, AZ 85721 USA Univ Arizona Tucson AZ USA 85721 Arizona AMS Facil, Tucson, AZ 85721 USA Univ Wollongong, Sch Geosci, Wollongong, NSW 2522, Australia Univ Wollongong Wollongong NSW Australia 2522 ongong, NSW 2522, Australia
Titolo Testata:
EARTH AND PLANETARY SCIENCE LETTERS
fascicolo: 3-4, volume: 191, anno: 2001,
pagine: 231 - 239
SICI:
0012-821X(20010915)191:3-4<231:TEFASS>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
LAST DEGLACIATION; MONSOON CLIMATE; LATE QUATERNARY; NORTH-ATLANTIC; EAST-AFRICA; KYR BP; RECORD; EVENT; TEMPERATURE; OCEAN;
Keywords:
Younger Dryas; paleoclimatology; global change; paleo-oceanography; general circulation models; Southern Oscillation; El Nino; North Atlantic oscillation; desert-loess transition zone;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Zhou, WJ Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, POB 17, Xian 710054, Peoples R China Chinese Acad Sci POB 17 Xian Peoples R China 710054 ples R China
Citazione:
W.J. Zhou et al., "Terrestrial evidence for a spatial structure of tropical-polar interconnections during the Younger Dryas episode", EARTH PLAN, 191(3-4), 2001, pp. 231-239

Abstract

The Younger Dryas chronozone, recognised in northern high-latitude areas as a cold event between 11 000 and 10 000 C-14 yr BP (12 900-11 600 cal. yr BP), seems to manifest itself globally in different ways. Here, we examine well-dated stratigraphic sequences together with high-resolution proxy dataplots from sites across our study area, the arid-semi-arid transition zonein northern China. This climatically sensitive area of China records a cold, dry Younger Dryas climate which was punctuated by a brief period of summer monsoon precipitation. We have since found that similar climatic sequences have been reported from the Sahel and the equatorial region of Africa. Based on evidence from these sites, together with other published data, we postulate that precipitation during the Younger Dryas chronozone was indicative of a low-latitude driving force superimposed on the high-latitude cold background. This rain belt rearrangement was most probably caused by an interaction between cold air advection and summer moisture transport across the tropical Pacific Ocean. Examination of high-resolution proxies suggests short-term climate fluctuations indicative of a global teleconnection involving moist air transportation patterns from the tropics to higher latitudes,varying with ENSO and other tropical factors. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 13/07/20 alle ore 06:56:13