US-China Collaborative Study of Holocene Paleoclimatology

黄土序列提供了大气中气溶胶浓度和陆地干旱史的良好记录。最适合研究的黄土序列在中国，那里在全新世沉积了多达10米的沉积物。在这段时间内，14C测年技术提供了准确的沉积史年表；因此，陆地气候变化与气候系统其他组成部分（冰量、海洋表面和深水温度）之间的时间关系可以准确确定。这一提议将研究中国的气候历史，这是一个对亚洲季风有敏感反应的地区。它之所以重要，是因为它将有助于提高我们对全新世早期季风环流增强的区域影响和年代学的理解，这已经在北印度洋沉积物岩心和附近的热带高山冰芯中得到了记录。

Loess sequences provide excellent records of aerosol concentrations in the atmosphere and the history of terrestrial aridity. The best loess sequences for study are in China, where as much as 10 meters of sediments were deposited in the Holocene. Throughout this interval of time, 14C dating techniques provide accurate chronologies of the sedimentation history; thus the temporal relationship between terrestrial climate change and other components of the climate system (ice volume, marine surface and deep water temperatures) can be accurately determined. This proposal will study the history of climate in China in a region with a sensitive response to the Asian monsoon. It is important because it will help to improve our understanding of the regional impact and chronology of the early Holocene intensification of monsoonal circulation, already documented in northern Indian Ocean sediment cores and nearby, tropical alpine ice cores.