摘要
位于以夏季降水为主的季风气候系统和以冬季降水为主的西风气候系统的过渡地带的中亚干旱区,包括哈萨克斯坦东部、新疆西部和吉尔吉斯斯坦东北部。综合中亚干旱区过去的地质记录等研究资料发现中亚干旱区过去五万年气候干旱程度的变化:在42～30 kyr BP期间,气候比较湿润;在28～13 kyr BP期间,气候比较干旱;在12～5 kyr BP期间,多数研究显示气候比较湿润;5 kyr BP以来,地质记录复杂,对于气候干旱程度有很大的分岐。中亚干旱区古气候变化在万年尺度上主要与地球轨道要素变化引起北半球太阳辐射变化有关。
Central Asia arid zone, including eastern Kazakhstan, northeast Kyrgyzstan and western Xinjiang, is located in transition zone between the summer-precipitation-monsoon climate system and winter-precipitation-westerly climate system. By comprehensive analysis the past geological records and research material in central Asia arid zone, how dry or humid is revealed over the past 50000 years in central Asia arid zone. 42-30 kyr BP, climate is wet; 28-13 kyr BP, climate is arid; 12-5 kyr BP, most records show that climate is wetter; After 5 kyr BP, the geologic record is complex, they don＇t imply the same dry or wet climate. In ten thousand major scales, climate change in central Asia arid zone is related with the earth＇s orbital elements changes, which is associated with changes in the northern hemisphere solar radiation.
出处
《铜仁学院学报》
2013年第1期132-136,共5页
Journal of Tongren University
基金
国家自然科学基金重点项目"中亚干旱带核心区域全新世生物气候变化的高分辩率重建"(No:40671190)
美国国家自然科学基金项目"Bioclimatic reconstruction of the past 50
000 years from eolian sequences inwesterlies-dominated Central Asia"(NSF-BCS-06-52304)
贵州省科学技术基金项目"梵净山自然文化遗产保护与可持续发展研究"(黔科合J字〔2012〕2320号)成果
关键词
中亚干旱区
古气候变化
黄土
冰期
Central Asia arid zone
Climate change
Loess
Glaciation
