• 气候与全球变化 •

青海季节冻土退化的成因及其对气候变化的响应

1. 1. 中国气象局国家气候中心气候研究开放试验室,北京 100081;
2. 青海省气候中心,西宁 810001
• 收稿日期:2006-12-15 修回日期:2007-05-30 出版日期:2008-01-25 发布日期:2008-01-25
• 作者简介:李林(1971-),男,甘肃永登人,高级工程师,在读硕士。主要从事气候变化及其对生态环境的影响研究。E-mail:qhxnll@sohu.com。
• 基金资助:

中国气象局气候变化专项项目(ccsf-2005-2-QH23)资助

Cause of seasonal tjale degeneration and its response to climate change in Qinghai

LI Lin1,2, WANG Zhen-yu2, WANG Qing-chun2, ZHU Xi-de2

1. 1. Climate Research Opening Laboratory of National Climate Center of China Meteorological Administration Beijing 100081, China;
2. Qinghai Climate Center, Xining 810001,China
• Received:2006-12-15 Revised:2007-05-30 Online:2008-01-25 Published:2008-01-25
• Supported by:

中国气象局气候变化专项项目(ccsf-2005-2-QH23)资助

Abstract:

Based on the mathematical statistic method of correlation analysis, the impact of natural factors of climate and topography upon spatial-temporal distribution of seasonal tjale is analyzed, and the response of tjale to air temperature, precipitation and cloudiness is also simulated. The results show that the topography and climate factor have a significant influence on the distribution and evolution of seasonal tjale in Qinghai, the topographic factors include altitude, longitude, latitude, slope, direction of inclination and so on. Since atmosphere is most active and sensitive compared with the others in the climate system, the climate factor and its change have significant effect on the seasonal tjale, at the same time, in that the tjale's response upon the temperature variation is most sensitive, so it is considered that global warming is the primary factor to cause seasonal tjale degeneration. The variation of local climate effect of the increasing of heat island effect brought by the urbanization in Xining and the decreasing of water effect caused by the descending of water level in Qinghai lake intensify the response of seasonal tjale upon climate change to some extent, the seasonal tjale has an evident time-delay upon the response of the air temperature variation at dekad and month scale, while it is not so significant on the interannual scale. At the same time, the response of surface temperature upon the temperature change is delayed gradually with the depth increasing, it shows : more deeper, the delay effect is more obvious.