中国农区AMSR-E土壤水分产品与地面测量的比较

Xiao-Jing Han, S. Duan, R. Tang, Hai-Qi Liu, Z. Li
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摘要

土壤水分在能量交换和水循环过程中起着重要作用。土壤湿度也为农业提供重要信息,包括作物生长和干旱。在本研究中,NASA AMSR-E土壤湿度产品与地面测量在(1)土壤湿度测量深度和(2)卫星立交桥次数方面进行了比较。结果表明,NASA AMSR-E土壤水分产品可用于监测土壤水分的时间序列变化。与下降立交桥的AMSR-E产品相比,上升立交桥的AMSR-E产品具有更好的监测土壤湿度变化的能力。AMSR-E产品对0 ~ 10 cm土壤水分的监测效果优于10 ~ 20 cm。
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Comparison OF AMSR-E soil moisture product and ground-based measurement over agricultural areas in China
Soil moisture plays an important role in the process of energy exchange and water cycle. Soil moisture also provides critical information in agriculture, including crop growth and drought. In this study, the comparison between NASA AMSR-E soil moisture product and ground-based measurement are performed in terms of (1) measurement depths of soil moisture, and (2) satellite overpass times. The results show that the NASA AMSR-E soil moisture product can be used to monitor time-series variation in soil moisture. Compared to the AMSR-E product from descending overpasses, the AMSR-E product from ascending overpasses has better ability in monitoring soil moisture variation. Also the AMSR-E product has better ability in monitoring soil moisture at the depth of 0-10 cm than 10-20 cm.
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