干旱区生态环境知识资源中心(Arid): Comparing global passive microwave freeze/thaw records: Investigating differences between Ka- and L-band products

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DOI	10.1016/j.rse.2020.111936
	Comparing global passive microwave freeze/thaw records: Investigating differences between Ka- and L-band products
	Johnston, Jeremy; Maggioni, Viviana; Houser, Paul
通讯作者	Johnston, J
来源期刊	REMOTE SENSING OF ENVIRONMENT
ISSN	0034-4257
EISSN	1879-0704
出版年	2020
卷号	247
英文摘要	The NASA L-Band Soil Moisture Active Passive (SMAP) satellite mission launched in 2015 has produced soil moisture and freeze thaw (FT) products at a global scale. While the use of L-band (1.41 GHz) passive microwave radiometry (P-MW) has proven useful in detecting changes in the surface FT state, these classifications have not been comprehensively assessed against similar existing FT products, such as the global FT record from the Special Sensor Microwave/Imager (SSM/I, Ka-band, 37.0 GHz) as part of the FT Earth System Data Record (FT-ESDR). In order to fill in this gap, this study investigates regions in which FT classifications diverge and identifies potential sources of classification variability. The SMAP and SSM/I FT records are compared over an extended period covering multiple seasonal cycles from April 2015 through December 2017. The spatially and temporally varying relationship between these products is examined in relation to climate (Koppen-Geiger climate classes and air temperature), MODIS (MoDerate Resolution Imaging Spectrometer) land cover, and topography (using Global Multi-resolution Terrain Elevation Data). SMAP and SSM/I FT product agreement proportion (Ap) was corrected for seasonality and then separated by land cover classes and compared to the global Ap mean. The agreement between these products vary most notably during freeze and thaw onset and in areas near abundant surface water, snow and ice, and wetlands. Relative to other vegetation types, reduced agreement between FT products is also observed over grasslands, sparsely vegetated lands, as well as mixed and evergreen forests. Distinct seasonal differences in FT classification agreement were also detected between products over cold arid regions and between continental and temperate classes. Similarly, as topographic complexity increases, a decreasing trend in agreement between L- and Ka-band FT products is observed. While reiterating challenges in FT classifications identified by prior studies, this work also contributes new insights by providing detailed geospatial and seasonal analyses into the factors contributing to FT product divergence.
英文关键词	Soil moisture active passive (SMAP) Freeze-thaw earth system data record (FT-ESDR) Microwave radiometry Freeze/thaw Cryosphere Climate Remote sensing Passive microwave Satellite applications
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000549189200036
WOS关键词	SOIL ; CLASSIFICATION ; ASSIMILATION ; VALIDATION ; SEASONS ; BOREAL ; RADAR ; SNOW ; DYNAMICS ; CYCLES
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325069
作者单位	[Johnston, Jeremy; Maggioni, Viviana] George Mason Univ, Sid & Reva Dewberry Dept Civil Environm & Infrast, 4400 Univ Dr,MS 6C1, Fairfax, VA 22030 USA; [Johnston, Jeremy; Houser, Paul] George Mason Univ, Dept Geog & Geoinformat Sci, 4400 Univ Dr,MS 6C3, Fairfax, VA 22030 USA
推荐引用方式 GB/T 7714	Johnston, Jeremy,Maggioni, Viviana,Houser, Paul. Comparing global passive microwave freeze/thaw records: Investigating differences between Ka- and L-band products[J],2020,247.
APA	Johnston, Jeremy,Maggioni, Viviana,&Houser, Paul.(2020).Comparing global passive microwave freeze/thaw records: Investigating differences between Ka- and L-band products.REMOTE SENSING OF ENVIRONMENT,247.
MLA	Johnston, Jeremy,et al."Comparing global passive microwave freeze/thaw records: Investigating differences between Ka- and L-band products".REMOTE SENSING OF ENVIRONMENT 247(2020).