摘要
利用2008年7月-2010年10月祁连山区西段疏勒河上游流域多年冻土区苏里梯度观测系统的辐射数据,分析了该区域的辐射变化特征。结果表明,向下短波辐射、向下和向上长波辐射、净辐射月总量季节性变化明显,冬、春季较小,夏、秋季较大;向上短波辐射月总量的季节变化不明显。日平均向下短波辐射、向下和向上长波辐射有明显的季节变化,1月或12月达到最小值,6月或7月达到峰值;1-3月和12月日平均向上短波辐射振幅变化较小,而4月和10月则变化较大。净辐射日变化冬、春季较小,且振幅也较小,夏、秋季较大,且振幅也较大;辐射四分量的日变化都呈单峰型。生长季节的地表反照率较小,非生长季较大;每年10月地表反照率的日平均变化起伏较大,日变化基本呈"U"形,早晚高、中午低。
The characteristics of radiation on the permafrost region of the upstream of Shule River are analyzed by radiation data from the measurements of gradient observation system from July 2008 to October 2010. The results show that： （1） The seasonal variation characteristics of monthly total downward shortwave radiation, downward longwave radiation, upward longwave radiation and net radiation are obvious： the maximum value appear in summer or autumn, and the minimum value appear in winter or spring; the seasonality of the monthly total upward short-wave radiation is not obvious; （2） The daily mean downward shortwave radiation, downward long-wave radiation and upward long-wave radiation has seasonality： They drop down to the minimum value in winter （usually in January or December） and rise up to the maximum value in summer （usually in June or July）. As for the daily mean upward short-wave radiation, its amplitude of variation is small from January to March and December and large in April and October. （3） The diurnal variation of net radiation is obvious in summer and autumn and the amplitude of variation is large, while the diurnal variation of net radiation is weak in winter and spring and the amplitude of variation is small. The diurnal variations of the components of radiation are all single peak. （4） Surface albedo is small during the growing season and it is big during non-growing season; the variation of surface albedo is remarkable in October and the diurnal variation of surface albedo is ‘U’ shape, with the maximum value in the morning and evening.
出处
《高原气象》
CSCD
北大核心
2013年第2期411-422,共12页
Plateau Meteorology
基金
国家自然科学基金重点项目(41271035
41030527
41130638)
冰冻圈科学国家重点实验室自主研究课题(SKLCS-ZZ-2012-02-01)
水利部公益性行业科研专项(2007SHZ1246)
国家科技支撑计划课题(2013BAB05B03)共同资助
关键词
多年冻土区
辐射变化
反照率
疏勒河
Permafrost region
Variation of radiation
Albedo
Shule River
