气候变化领域集成服务门户(CCPortal): Global evaluation of terrestrial near-surface air temperature and specific humidity retrievals from the Atmospheric Infrared Sounder (AIRS)

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DOI	10.1016/j.rse.2020.112146
	Global evaluation of terrestrial near-surface air temperature and specific humidity retrievals from the Atmospheric Infrared Sounder (AIRS)
	Sun J.; McColl K.A.; Wang Y.; Rigden A.J.; Lu H.; Yang K.; Li Y.; Santanello J.A.; Jr
发表日期	2021
ISSN	00344257
卷号	252
英文摘要	Global observations of near-surface air temperature and specific humidity over land are needed for a variety of applications, including to constrain global estimates of evapotranspiration (ET). Spaceborne hyperspectral observations, such as those from NASA's Atmospheric Infrared Sounder (AIRS) mission, show promise for meeting this need, yet there are surprisingly few validation studies of AIRS near-surface atmospheric state retrievals. In this study, we use triple collocation to validate AIRS Level 3 retrievals of near-surface atmospheric state over land using twelve years of gridded station observations and two reanalyses. Deseasonalized AIRS retrievals correlate well with deseasonalized ground observations outside the tropics, but correlate less well in the tropics. Lower temporal sensitivity near the surface in the tropics contributes to the lower correlation for near-surface air temperature and is consistent with known physics of the tropical atmosphere, in which temperatures outside the boundary layer (which dominate the AIRS retrieval signal) are poorly correlated with those near the surface. Retrievals in the tropics may also be more susceptible to errors in cloud-clearing algorithms, and to uncertainty in surface emissivity. Since ET is greatest in the tropics, and tropical measurement networks are particularly sparse, this work motivates new approaches for measuring ET in the tropics. © 2020 The Author(s)
语种	英语
scopus关键词	Acoustic devices; Atmospheric humidity; Atmospheric thermodynamics; Boundary layers; Infrared devices; Infrared instruments; NASA; Sounding apparatus; Tropics; Atmospheric infrared sounders; Cloud-clearing algorithm; Ground observations; Hyperspectral observations; Measurement networks; Near surface air temperature; Temporal sensitivity; Tropical atmospheres; Atmospheric temperature; air temperature; AIRS; boundary layer; evapotranspiration; global change; ground-based measurement; humidity; model validation
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179055
作者单位	Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, 100084, China; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Center for Excellence in Tibetan Plateau Earth Sciences and National Tibetan Plateau Data Center, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; NASA-GSFC Hydrological Sciences Laboratory, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Sun J.,McColl K.A.,Wang Y.,et al. Global evaluation of terrestrial near-surface air temperature and specific humidity retrievals from the Atmospheric Infrared Sounder (AIRS)[J],2021,252.
APA	Sun J..,McColl K.A..,Wang Y..,Rigden A.J..,Lu H..,...&Jr.(2021).Global evaluation of terrestrial near-surface air temperature and specific humidity retrievals from the Atmospheric Infrared Sounder (AIRS).Remote Sensing of Environment,252.
MLA	Sun J.,et al."Global evaluation of terrestrial near-surface air temperature and specific humidity retrievals from the Atmospheric Infrared Sounder (AIRS)".Remote Sensing of Environment 252(2021).