"North-South" dipolar mode of precipitation changes in eastern China extends to the Last Deglaciation

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2018,（24）
• 页码范围: 1604-1605
• 页数: 2页
• 语种: 英文

摘要

Changes in the East Asian summer monsoon (EASM) are closely related to human wellbeing,and thus improving our knowledge of the evolution of the EASM is of major socioeconomic importance,as well as being of scientific interest.Previous studies have shown that during the Holocene (the present interglacial) a "North-South" dipolar mode of precipitation change occurred over eastern China (i.e.the so-called "northern drought-southern flood" scenario,or vice versa) on decadal [1,2],centennial [3] and millennial time-scales ([4] and references therein).A recent high-resolution speleothem trace element-based precipitation record from Haozhu Cave in the Yangtze River Valley (YRV) [5],together with a pollen-based quantitative precipitation reconstruction from Lake Gonghai in North China [6],further suggests that this dipolar mode extended to the Last Deglaciation [5].This inference is based on the recorded anti-phased variation of precipitation between North China and the YRV during the Younger Dryas (YD),Bφlling-Allerφd (B-A),and part of Heinrich Event 1 (H1) (Fig.1a,b).