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
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摘要: 文中给出了用大孔径闪烁仪在2000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65%,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。Abstract: This paper gives the measurements of the sensible heat flux over saline-alkali land by LAS (L arge 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 netradiation is 65% in drought and non-growing seasons,11% in rainy and grow ing seasons.The sensible heat flux decreases obviously due to rainf all,the decrease is related to the rainf all rate.And this aspect canindicate the character of the soil.Comparing with the tranditional gradient method,the two sets of data are consistent.
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Keywords:
- Sensible heat flux /
- Saline-alkali land /
- LAS /
- Gradient.
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