干旱区生态环境知识资源中心(Arid): Global Mapping of Microwave Emissivity and Emitting Depth in Arid Areas Using GMI Observations

Arid

DOI	10.1029/2022EA002756
	Global Mapping of Microwave Emissivity and Emitting Depth in Arid Areas Using GMI Observations
	Favrichon, Samuel; Prigent, Catherine; Jimenez, Carlos; Vogt, Roland
通讯作者	Favrichon, S
来源期刊	EARTH AND SPACE SCIENCE
EISSN	2333-5084
出版年	2023
卷号	10 期号:11
英文摘要	Over arid areas, observations of brightness temperatures by passive microwave radiometers are affected by the variation of the emitting depth with wavelengths. When this variation is unaccounted for, it limits the assimilation of passive microwaves over deserts in Numerical Weather Prediction models and it causes large errors in passive microwave retrievals of land surface temperatures. The emitting depths, along with the corresponding emissivities, are estimated from 10 to 89 GHz, using the non-Sun-synchronous observations of the Global Precipitation Mission Microwave Imager to reconstruct the monthly diurnal cycle of brightness temperature. The soil temperature profile is modeled using a two-term Fourier decomposition based on the ERA5 surface temperature. The combination of the observation and the modeled temperature allows for an estimation of the microwave effective emitting depth. The emitting depth is estimated to be up to 25 cm at 36 GHz, resulting in large differences between the surface temperature and the effective emitting temperature. The variation of emitting depth with frequency is parameterized, and a companion data set provides the necessary parameters to calculate the emitting depth for arid areas between 10 and 89 GHz, globally. The benefit of this parameterization is quantified, with an application to the modeling of observations from the Special Sensor Microwave Imager Sounder over arid areas.
英文关键词	passive microwave arid areas land surface temperature
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001092684000001
WOS关键词	LAND-SURFACE EMISSIVITIES ; DIELECTRIC-PROPERTIES ; SOIL ; PARAMETERIZATION ; PERMITTIVITY ; PENETRATION ; SSM/I ; MODEL
WOS类目	Astronomy & Astrophysics ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395871
推荐引用方式 GB/T 7714	Favrichon, Samuel,Prigent, Catherine,Jimenez, Carlos,et al. Global Mapping of Microwave Emissivity and Emitting Depth in Arid Areas Using GMI Observations[J],2023,10(11).
APA	Favrichon, Samuel,Prigent, Catherine,Jimenez, Carlos,&Vogt, Roland.(2023).Global Mapping of Microwave Emissivity and Emitting Depth in Arid Areas Using GMI Observations.EARTH AND SPACE SCIENCE,10(11).
MLA	Favrichon, Samuel,et al."Global Mapping of Microwave Emissivity and Emitting Depth in Arid Areas Using GMI Observations".EARTH AND SPACE SCIENCE 10.11(2023).