Late marine isotope stage 3 palaeoclimate for East Asia: A data-model comparison
Late marine isotope stage 3 palaeoclimate for East Asia: A data-model comparison
复制标题
DOI：
10.1016/j.palaeo.2007.03.010
复制
发表时间：
2007-06
期刊：
影响因子：
--
通讯作者：
Ge Yu;F. Gui;Ya-feng Shi;Yiqun Zheng
中科院分区：
文献类型：
--
作者：
Ge Yu;F. Gui;Ya-feng Shi;Yiqun Zheng
人类学温室气体排放影响下的气候预测是不可能验证的，但它可以从过去的气候和模型中推断出来。在东亚，一个普遍的暖湿期晚海洋同位素阶段3，约。30-40 ky BP已根据广泛的地质记录确定;这为人类活动可能导致的未来变暖提供了干旱/潮湿的参考。本文在综合地质证据和AGCM+SSiB模式的基础上，利用太阳辐射、冰川作用和陆面条件对东亚35 kyBP的气候进行了模拟。结果表明：（1）35 kBP时，中国北方为暖湿气候，而南方为暖干气候;（2）中低纬度地区年平均气温偏高，主要是冬季气温升高所致，表明太阳辐射通过大气环流与陆面模式的耦合产生了显著的气候效应;（3）北方第四纪冰盖对中高纬度地区气温下降起着重要作用，增强了南北温度梯度，增强了低纬向高纬的水汽输送，增加了高原季风降水;（4）东亚地区植被的变化主要是由于低纬地区气温升高，雨带向北延伸到中国，内陆降水量增加的区域扩大。
Climate prediction under impact of anthropological greenhouse-gas emission is impossible to validate, but it can be inferred from past climate and modeling. In East Asia, a general warm–wet period at late Marine Isotope Stage 3, ca. 30–40 ky BP has been identified based upon extensive geological records; this provides an arid/humid reference for possible future warming caused by human activities. Based upon syntheses of geological evidence and the AGCM+SSiB modeling, this paper presents climate simulations focused on 35 ky BP, using forcing of insolation, glaciation and land surface conditions for East Asia. Results of the simulation can be compared with geological records and show that (1) the climate patterns of 35 ky BP were warm–wet conditions in northern China, but with warm–dry conditions in southern China compared to today; (2) mean annual temperatures were higher in most mid-low latitude areas, mainly contributed to by increased winter temperatures, suggesting that insolation has generated significant climate effects through the coupling in atmospheric circulation with land surface patterns; (3) Quaternary ice sheets in the Northern Hemisphere played an important role in temperature decrease at the mid-high-latitudes, and also enhanced the south–north temperature gradients, which in turn, increased moisture transport from low to high latitudes and increased monsoonal precipitation over the Tibetan Plateau; and (4) Vegetation changes in East Asia resulted from an increased temperature in the low latitudes, extended rain-belt northwards into China, and an enlarged area of increased precipitation inland.