干旱区地理2024，Vol.47Issue(12)：1991-2004,14.DOI:10.12118/j.issn.1000-6060.2024.046
石河子垦区绿洲农田下垫面辐射收支特征研究
Radiation expenditure characteristics of oasis farmland in Shihezi reclamation area
摘要
Abstract
Oasis farmland is a unique ecosystem in arid and semi-arid regions,making the study of energy bal-ance and climate formation mechanisms highly significant.Using observational data from oasis farmland in the Shihezi reclamation area,Xinjiang,China collected between April 2021 and March 2022,this study analyzed the variation characteristics of radiation components and surface albedo in oasis subpads.It compared the radiation components over different crop types(cotton and corn)and performed a differential analysis with bare land in the same area.The results indicate the following:(1)The daily means of downward shortwave and longwave radiation,upward longwave radiation,and net radiation on the underlying surface of oasis farmland were higher during the growth period than during the non-growth period.Upward shortwave radiation was maximal in winter,exhibiting the largest amplitude changes during this season.(2)Within the same area,oasis farmland under different crop types exhibited variations in radiation components during the plant growth and development phases.The daily aver-age maximum differences in upward shortwave radiation,longwave radiation,and net radiation were 33.74 W·m-2,54.82 W·m-2,and 65.98 W·m-2,respectively.The difference in net radiation between farmland with crops and bare land was particularly pronounced,with a lag effect of approximately 1 hour in the daily peak radiation time for farmland compared to bare land.(3)The annual net radiation exposure of bare land differed by 1147.8 MJ·m-2 compared to cotton fields and by 1519.7 MJ·m-2 compared to corn fields.(4)The surface albedo of bare land,cot-ton fields,and corn fields was highest in winter,with annual averages of 0.34,0.23,and 0.25,respectively.The annual average surface albedo of bare land exceeded that of farmland with crops,with a maximum difference of 0.11.Rainfall events reduced surface albedo,while snowfall increased it.关键词
绿洲农田下垫面/地表辐射收支/地表反照率/石河子垦区Key words
oasis farmland underlying surface/surface radiation expenditure/surface albedo/Shihezi reclama-tion area引用本文复制引用
张红伟,何清,杨明凤,安冬亮,吴春霞,王进,陈非凡..石河子垦区绿洲农田下垫面辐射收支特征研究[J].干旱区地理,2024,47(12):1991-2004,14.基金项目
新疆生产建设兵团重大科技项目"天山北坡兵地重点城市污染天气成因、影响机理、监测预警及综合治理关键技术研究与应用示范"(2023AB036)资助 （2023AB036）
