A long arid interlude in the Indian summer monsoon during ∼4,350 to 3, 450 cal. yr BP contemporaneous to displacement of the Indus valley civilization

被引：79

作者：

Dutt, Som ^{[1
]}

Gupta, Anil K. ^{[2
]}

Wunnemann, Bernd ^{[3
]}

Yan, Dada ^{[3
]}

机构：

[1] Wadia Inst Himalayan Geol, 33 Gen Mahadeo Singh Rd, Dehra Dun 248001, Uttar Pradesh, India

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

[3] East China Normal Univ, Inst Estuarine & Coastal Res, Shanghai 200062, Peoples R China

来源：

QUATERNARY INTERNATIONAL | 2018年 / 482卷

关键词：

Indian summer monsoon; 4.2 kyr BP event; Indus valley civilization; North west Himalaya; HOLOCENE ENVIRONMENTAL-CHANGES; NORTHEASTERN TIBETAN PLATEAU; CLIMATE-CHANGE; NORTHWEST HIMALAYA; LAKE SEDIMENT; RECORD; COLLAPSE; PROXY; AGE; VARIABILITY;

D O I：

10.1016/j.quaint.2018.04.005

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Climatic variability played a pivotal role in the development of human societies and stability of civilizations in the past. To constrain the causes that drove displacement and deurbanization of the Indus Valley civilization, we present a 4500 yr old proxy record from the Tso Moriri Lake, northwestern (NW) Himalaya. The record indicates an interval of warm and wet climatic conditions from 4500 to 4350 calibrated years before Present (cal. yr BP) with a trend toward deteriorating climate, culminating in a pronounced, long cold and arid phase from similar to 4350 to 3450 cal. yr BP in the region. The Indian summer monsoon (ISM) weakened during this long arid phase depleting the water resources in the area of the Indus Valley settlements that likely have triggered the gradual abandonment of the Harappan cities. This long interval of ISM weakening and thus aridity in South Asia was driven by enhanced El Nino intensity and frequency.

引用

页码：83 / 92

页数：10