乾安地区盐碱地显热通量的测量  

MEASURING SENSIBLE HEAT FLUX OVER SALINE-ALKALI LAND AREA IN QIANAN

作　　者：支克广[1] 涂钢[1] 廉毅[1] 隋朝阳[1] 付光极 王江 

机构地区：[1]吉林省气象科学研究所,长春130062 [2]乾安县气象局,乾安131400

出　　处：《气象学报》2002年第6期780-785,共6页Acta Meteorologica Sinica

基　　金：中国与荷兰签订的合作项目"建立关于荒漠化和粮食保障的中国能量与水平衡监测系统";乾安LAS站是吉林省科技厅发展计划项目 ( 990 2 18)。

摘　　要：文中给出了用大孔径闪烁仪在 2 0 0 0年生长季观测到的盐碱地区显热通量的主要结果 ,并初步计算了当地的水热平衡状况。结果表明 :乾安盐碱地区显热通量占净辐射量的百分比在干旱、非生长季达到 6 5 % ,在多雨、植被生长季仅为 11% ;显热通量因降水而明显降低 ,幅度与降水强度有关 ,反映了当地的气候和土壤特征。文中还把LAS的测量结果与传统的梯度法作了比较 ,结果基本一致。This paper gives the measurements of the sensible heat flux over saline-alkali land by LAS (Large Aperture Scintillometer) in the growing season of 2000. Calculations of water-heat balance have been made. In Qianan saline-alkali land area, the sensible heat flux accounting for net radiation is 65% in drought and non-growing seasons, 11% in rainy and growing seasons. The sensible heat flux decreases obviously due to rainfall, the decrease is related to the rainfall rate. And this aspect can indicate the character of the soil. Comparing with the tranditional gradient method, the two sets of data are consistent.

关 键 词：乾安地区 显热通量 盐碱地 闪烁仪 梯度 降水强度 

分 类 号：S152.8[农业科学—土壤学]