Abrupt changes in Indian summer monsoon strength during 33,800 to 5500years BP

被引：244

作者：

Dutt, Som ^{[1
]}

Gupta, Anil K. ^{[1
,2
]}

Clemens, Steven C. ^{[3
]}

Cheng, Hai ^{[4
,5
]}

Singh, Raj K. ^{[6
]}

Kathayat, Gayatri ^{[4
]}

Edwards, R. Lawrence ^{[5
]}

机构：

[1] Wadia Inst Himalayan Geol, Dehra Dun 248001, Uttar Pradesh, India

[2] Indian Inst Technol, Dept Geol & Geophys, Kharagpur 721302, W Bengal, India

[3] Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA

[4] Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China

[5] Univ Minnesota, Dept Earth Sci, Minneapolis, MN USA

[6] Indian Inst Technol, Sch Earth Ocean & Climate Sci, Bhubaneswar, Orissa, India

来源：

GEOPHYSICAL RESEARCH LETTERS | 2015年 / 42卷 / 13期

基金：

美国国家科学基金会;

关键词：

Indian summer monsoon; precipitation; Mawmluh Cave; speleothem; oxygen isotopes; OXYGEN ISOTOPES; NORTH-ATLANTIC; ASIAN MONSOON; CLIMATE; PRECIPITATION; VARIABILITY; HOLOCENE; PALEOCLIMATE; RECORDS; VALUES;

D O I：

10.1002/2015GL064015

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Speleothem proxy records from northeastern (NE) India reflect seasonal changes in Indian summer monsoon strength as well as moisture source and transport paths. We have analyzed a new speleothem record from Mawmluh Cave, Meghalaya, India, in order to better understand these processes. The data show a strong wet phase 33,500-32,500years B.P. followed by a weak/dry phase from 26,000 to 23,500years B.P. and a very weak phase from 17,000 to 15,000years B.P. The record suggests abrupt increase in strength during the BOlling-AllerOd and early Holocene periods and pronounced weakening during the Heinrich and Younger Dryas cold events. We infer that these changes in monsoon strength are driven by changes in temperature gradients which drive changes in winds and moisture transport into northeast India.

引用

页码：5526 / 5532

页数：7

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