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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廉毅等.吉林省西部荒漠化发展的陆地卫星遥感监测分析.气象学报,1999,57(6):662~667 陈万隆,翁笃鸣等.关于青藏高原感热与潜热旬总量计算方法的初步研究.见:青藏高原气象科学实验文集编辑组.青藏高原气象科学实验文集.北京:科学出版社,1984.35~45 丁一汇等.1998 年夏淮河流域试验加密观测期间主要天气形势特点及其重要观测成果.见:赵柏林,丁一汇主编.淮河流域能量与水分循环研究(一).北京:气象出版社,1999.1~11 Wang Ting-i,et al.A saturation resistant optical scintillometer to measure Cn2.JOpt Soc Am,1978,68:334~338
Hill,et al.Refractive-index and absorption fluctuations in the infrared caused by temperature,humidity and pressure fluctuations.J Opt Soc Am,1980,70:1192~1205.
De Bruin,HAR,et al.The Scint illation method tested over a dry vineyard area.Boundary-Layer Meteor.1995,76:24~40
北京农业大学气象专业编.农业气象学.北京:科学出版社,1984.137~147 杨正明等.农业气象仪器原理.北京:北京农业大学出版社,1989.137~268 朱治林等.用微气象方法估算淮河流域能量平衡的实验研究.见:赵柏林,丁一汇主编.淮河流域能量与水分循环研究(一).北京:气象出版社,1999.144~152
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