沙漠与绿洲气象2025，Vol.19Issue(3)：165-173,9.DOI:10.12057/j.issn.1002-0799.2310.16003
雅鲁藏布江下游典型河谷地带辐射收支及反照率特征研究
Characteristics of the Surface Radiation Budget and Albedo in Typical Valley Areas of the Lower Yarlung Zangbo River
摘要
Abstract
This study analyzed the monthly variations of surface radiation components,surface albedo,and diurnal variations under typical sunny and cloudy conditions in different seasons,based on surface radiation data collected from Nyingchi Airport in the lower Yarlung Zangbo River Valley in 2014,combined with the clear-sky index to identify sunny and cloudy days.The results are summarized as follows:(1)The monthly average variations in surface radiation components reveal that all components except shortwave radiation exhibit distinct unimodal patterns.The monthly maximum averages of surface longwave radiation,atmospheric longwave radiation,and net radiation occur between June and August,with values of 414.1,371.2,and 151.4 W·m-2,respectively.In contrast,the monthly maximum average of reflected shortwave radiation is observed in March at 98.4 W·m-2.Summer had a higher frequency of cloudy days than the 14-year average,leading to an unusual peak in total solar radiation in October(560.3 W·m-2)instead of the expected summer months.(2)On typical sunny days,the diurnal variations of radiation components exhibit a smooth single-peak type,whereas cloudy days show irregular multi-peak shapes.Cloudy days enhance atmospheric longwave radiation,which decreases in the afternoon due to local circulations.Other radiation intensities are significantly decreased during the daytime,while surface longwave radiation and net radiation increased notably at night.(3)The monthly average diurnal variation of surface albedo shows a U-shaped type,initially decreasing and then increasing.Seasonally,surface albedo follows the order winter>autumn>spring>summer,with the maximum monthly average in February(0.25)and the minimum in June(0.14).关键词
雅鲁藏布江下游河谷/地表辐射收支/地表反照率Key words
lower Yarlung Zangbo River valley/surface radiation budget/surface albedo分类
天文与地球科学引用本文复制引用
吴俊杰,任佳莉,夏春炯,庞毅,黄萌..雅鲁藏布江下游典型河谷地带辐射收支及反照率特征研究[J].沙漠与绿洲气象,2025,19(3):165-173,9.基金项目
国家重点研发计划项目(2021YFB2601701) （2021YFB2601701）
民航飞行技术与飞行安全重点实验室项目(FZ2020ZZ03 （）
F2018KF05) （）
四川省大学生创新创业训练项目(S202210624132) （S202210624132）
