A Preliminary Evaluation of the SMAP Radiometer Soil Moisture Product over United States and Europe Using Ground-Based Measurements

	A Preliminary Evaluation of the SMAP Radiometer Soil Moisture Product over United States and Europe Using Ground-Based Measurements
	Zeng, Jiangyuan 1; Chen, Kun-Shan 1; Bi, Haiyun 1; Chen, Quan 1
刊名	IEEE Transactions on Geoscience and Remote Sensing
	2016
卷号	54 期号:8 页码:4929-4940
关键词	PRECIPITATION FORECASTS NUMERICAL-SIMULATION EXTREME RAINFALL MESOSCALE MODEL RESOLUTION SYSTEM SATELLITE EVENT STORM
英文摘要	The Soil Moisture Active Passive (SMAP) mission, which is the newest L-band satellite that is specifically designed for soil moisture monitoring, was launched on January 31, 2015. A beta quality version of the SMAP radiometer soil moisture product was recently released to the public. It is crucial to evaluate the reliability of this product before it can be routinely used in hydrometeorological studies at a global scale. In this paper, we carried out a preliminary evaluation of the SMAP radiometer soil moisture product against in situ measurements collected from three networks that cover different climatic and land surface conditions, including two dense networks established in the U.S. and Finland, and one sparse network set up in Romania. Results show that the SMAP soil moisture product is in good agreement with the in situ measurements, although it exhibits dry or wet bias at different network regions. It well reproduces the temporal evolution and anomalies of the observed soil moisture with a favorable correlation greater than 0.7. The overall ubRMSE (unbiased root mean square error) of SMAP product is 0.036 m3•m-3, well within the mission requirement of 0.04 m3•m-3. The error sources of SMAP soil moisture product may be associated with the parameterization of vegetation and surface roughness but still needs to be tested and confirmed in more extent. Considering that the algorithms are still under refinement, it can be reasonably expected that hydrometeorological applications will benefit from the SMAP radiometer soil moisture product. © 2016 IEEE.
学科主题	Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology
类目[WOS]	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:20161802317319
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39178]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 2.100101, China 3. Department of Electrical Engineering, University of Texas at Arlington, Arlington 4.TX 5.76019, United States 6. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 7.100029, China 8. Airborne Remote Sensing Center, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 9.100094, China
推荐引用方式 GB/T 7714	Zeng, Jiangyuan,Chen, Kun-Shan,Bi, Haiyun,et al. A Preliminary Evaluation of the SMAP Radiometer Soil Moisture Product over United States and Europe Using Ground-Based Measurements[J]. IEEE Transactions on Geoscience and Remote Sensing,2016,54(8):4929-4940.
APA	Zeng, Jiangyuan,Chen, Kun-Shan,Bi, Haiyun,&Chen, Quan.(2016).A Preliminary Evaluation of the SMAP Radiometer Soil Moisture Product over United States and Europe Using Ground-Based Measurements.IEEE Transactions on Geoscience and Remote Sensing,54(8),4929-4940.
MLA	Zeng, Jiangyuan,et al."A Preliminary Evaluation of the SMAP Radiometer Soil Moisture Product over United States and Europe Using Ground-Based Measurements".IEEE Transactions on Geoscience and Remote Sensing 54.8(2016):4929-4940.