首页> 外文会议>Geoscience and Remote Sensing Symposium, 1996. IGARSS '96. 'Remote Sensing for a Sustainable Future.', International >Spatial and temporal trends in land surface moisture and temperature observable using data from the Nimbus-7 microwave radiometer
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Spatial and temporal trends in land surface moisture and temperature observable using data from the Nimbus-7 microwave radiometer

机译:利用Nimbus-7微波辐射计的数据可观测到地表水分和温度的时空趋势

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Nimbus-7 SMMR brightness temperatures have been reprocessed in a form that simplifies the data handling associated with estimation and analysis of global land parameter fields. Spatial and temporal analyses of the brightness temperatures indicate their sensitivities to land surface and atmospheric conditions, and show trends linked to changing surface moisture, temperature, and vegetation patterns. An estimation algorithm is used, calibrated to sites in arid regions and forests, to obtain preliminary estimates of the land parameters for a given geographic region focusing on semiarid areas were the potential for observing moisture variability using the SMMR channels is greatest, the estimates are compared with model output data. Results of the study are helpful in evaluating the potential of future L-band spaceborne radiometer measurements, which would have greatly increased capability for surface moisture estimation if available.
机译:Nimbus-7 SMMR亮度温度经过重新处理,其形式简化了与估计和分析全球陆地参数字段相关的数据处理。亮度温度的时空分析表明它们对陆地表面和大气条件的敏感性,并显示与表面湿度,温度和植被格局变化有关的趋势。使用估计算法,将其校准到干旱地区和森林中的地点,以针对半干旱地区的给定地理区域获得土地参数的初步估计,如果使用SMMR通道观测水分变异性的潜力最大,则将估计值进行比较与模型输出数据。研究结果有助于评估未来L波段星载辐射计测量的潜力,如果可能的话,这将大大提高估计表面湿度的能力。

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