阿尔泰山北部过去2000 a来的气候记录集成

Synthesized Climate Change in the North Altay Mountains in the Past 2 000 Years

在综述阿尔泰山北部过去2 000 a气候变化研究成果的基础上,归纳了文献中所包含气候信息的地理一致性。就气温而言,基于阿尔泰山北部湖芯、树轮和冰芯重建的气温序列真实记录了北半球的重要气候事件,包括罗马最适宜期(0-400年)、黑暗时代冷期(400-600年)、中世纪暖期(800-1200年)、小冰期(1400-1860年)和现代暖期(自1860年以来)。由太阳活动主控的太阳辐射变化是过去2 000 a来阿尔泰山北部气温变化的主导因素,过去150 a来大气CO2的增加是现代暖期(自1860年以来)升温的主导因素。就降水而言,阿尔泰山北部过去2 000 a的降水变化趋势显示,高降水时段出现在0-450年、600-800年、1050-1300年、1650-1860年,低降水时段出现在450-600年、800-1050年、1300-1650年、1860-2000年。此外,阿尔泰山北部过去2 000 a来气温和降水的组合并不支持所谓的"暖干-冷湿"水热配置模式。

This study firstly reviewed the achievements about climate change in the north Altay Mountains over the past 2 000 years,and then summarized the geographical consistency of climate information contained in these documents.Mutil-proxies(lake cores,tree rings and ice cores)recorded the five important climatic events in the Northern Hemisphere,including the Roman Optimum(0-400 AD),Dark Age Cold Period(400-600 AD),Medieval Warm Period(800-1200 AD),Little Ice Age(1400-1860 AD),and recent warming period(since 1860 AD).These climatic events were mainly modulated by solar activity-dominated solar radiation variations in the past2 000 years and recent warming period since 1860 AD,which were largely attributable to an increase of CO2 concentration in the past 150 years.The precipitation history in the north Altay Mountains over the past 2 000 years indicated that these periods including 0-450,600-800,1050-1300,1650-1860 AD were characterized by high precipitation,and those including 450-600,800-1050,1300-1650,1860-2000 AD were featured by low precipitation.In addition,the combination of temperature and precipitation in the north Altay Mountains over the past 2 000 years did not supported the"cold-wet and warm-dry"hydrothermal configuration in the arid zone in Central Asia.