干旱区生态环境知识资源中心(Arid): Using Cosmic-Ray Neutron Probes in Validating Satellite Soil Moisture Products and Land Surface Models

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DOI	10.3390/w11071362
	Using Cosmic-Ray Neutron Probes in Validating Satellite Soil Moisture Products and Land Surface Models
	Duygu, Mustafa Berk; Akyurek, Zuhal
通讯作者	Akyurek, Zuhal
来源期刊	WATER
EISSN	2073-4441
出版年	2019
卷号	11 期号:7
英文摘要	Soil moisture content is one of the most important parameters of hydrological studies. Cosmic-ray neutron sensing is a promising proximal soil moisture sensing technique at intermediate scale and high temporal resolution. In this study, we validate satellite soil moisture products for the period of March 2015 and December 2018 by using several existing Cosmic Ray Neutron Probe (CRNP) stations of the COSMOS database and a CRNP station that was installed in the south part of Turkey in October 2016. Soil moisture values, which were inferred from the CRNP station in Turkey, are also validated using a time domain reflectometer (TDR) installed at the same location and soil water content values obtained from a land surface model (Noah LSM) at various depths (0.1 m, 0.3 m, 0.6 m and 1.0 m). The CRNP has a very good correlation with TDR where both measurements show consistent changes in soil moisture due to storm events. Satellite soil moisture products obtained from the Soil Moisture and Ocean Salinity (SMOS), the METOP-A/B Advanced Scatterometer (ASCAT), Soil Moisture Active Passive (SMAP), Advanced Microwave Scanning Radiometer 2 (AMSR2), Climate Change Initiative (CCI) and a global land surface model Global Land Data Assimilation System (GLDAS) are compared with the soil moisture values obtained from CRNP stations. Coefficient of determination (r2) and unbiased root mean square error (ubRMSE) are used as the statistical measures. Triple Collocation (TC) was also performed by considering soil moisture values obtained from different soil moisture products and the CRNPs. The validation results are mainly influenced by the location of the sensor and the soil moisture retrieval algorithm of satellite products. The SMAP surface product produces the highest correlations and lowest errors especially in semi-arid areas whereas the ASCAT product provides better results in vegetated areas. Both global and local land surface models' outputs are highly compatible with the CRNP soil moisture values.
英文关键词	Cosmic Ray Neutron Probe land surface model SMAP SMOS AMSR2 ASCAT CCI GLDAS
类型	Article
语种	英语
国家	Turkey
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000480632300047
WOS关键词	WATER CONTENT ; CALIBRATION ; SMOS ; SMAP
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219225
作者单位	Middle East Tech Univ, Civil Engn Dept, Water Resources Lab, TR-06800 Ankara, Turkey
推荐引用方式 GB/T 7714	Duygu, Mustafa Berk,Akyurek, Zuhal. Using Cosmic-Ray Neutron Probes in Validating Satellite Soil Moisture Products and Land Surface Models[J],2019,11(7).
APA	Duygu, Mustafa Berk,&Akyurek, Zuhal.(2019).Using Cosmic-Ray Neutron Probes in Validating Satellite Soil Moisture Products and Land Surface Models.WATER,11(7).
MLA	Duygu, Mustafa Berk,et al."Using Cosmic-Ray Neutron Probes in Validating Satellite Soil Moisture Products and Land Surface Models".WATER 11.7(2019).