Satellite-based radiative forcing by light-absorbing particles in snow across the  Northern Hemisphere

doi:10.5194/acp-2020-50

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-50
	Satellite-based radiative forcing by light-absorbing particles in snow across the Northern Hemisphere
	Jiecan Cui, Tenglong Shi, Yue Zhou, Dongyou Wu, Xin Wang, and Wei Pu
	2020-04-22
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	Snow is the most reflective natural surface on Earth and consequently plays an important role in Earth’s climate. Light-absorbing particles (LAPs) deposited on the snow surface can effectively decrease snow albedo, resulting in positive radiative forcing. In this study, we used remote sensing data from NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS) and the Snow, Ice, and Aerosol Radiative (SNICAR) model to quantify the reduction in snow albedo due to LAPs, before validating and correcting the data against in situ observations. We then incorporated these corrected albedo reduction data in the Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART) model to estimate Northern Hemisphere radiative forcing in January and February for the period 2003–2018. Our analysis reveals an average corrected reduction in snow albedo of ~0.0246, with instantaneous radiative forcing and daily radiative forcing values of ~5.87 and ~1.69 W m⁻², respectively. We also observed significant spatial variations in corrected snow albedo reduction, instantaneous radiative forcing and daily radiative forcing throughout the Northern Hemisphere, with the lowest respective values (~0.0123, ~1.09 W m⁻², and ~0.29 W m⁻²) occurring in the Arctic and the highest (~0.1669, ~36.02 W m⁻², and ~10.60 W m⁻²) in northeastern China. From MODIS retrievals, we determined that the LAP content of snow accounts for 57.6 % and 37.2 % of the spatial variability in Northern Hemisphere albedo reduction and radiative forcing, respectively. We also compared retrieved radiative forcing values with those of earlier studies, including local-scale observations, remote-sensing retrievals, and model-based estimates. Ultimately, estimates of radiative forcing based on satellite-retrieved data are shown to represent true conditions on both regional and global scales.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/248947
专题	地球科学
推荐引用方式 GB/T 7714	Jiecan Cui, Tenglong Shi, Yue Zhou, Dongyou Wu, Xin Wang, and Wei Pu. Satellite-based radiative forcing by light-absorbing particles in snow across the Northern Hemisphere[J]. Atmospheric Chemistry and Physics,2020.
APA	Jiecan Cui, Tenglong Shi, Yue Zhou, Dongyou Wu, Xin Wang, and Wei Pu.(2020).Satellite-based radiative forcing by light-absorbing particles in snow across the Northern Hemisphere.Atmospheric Chemistry and Physics.
MLA	Jiecan Cui, Tenglong Shi, Yue Zhou, Dongyou Wu, Xin Wang, and Wei Pu."Satellite-based radiative forcing by light-absorbing particles in snow across the Northern Hemisphere".Atmospheric Chemistry and Physics (2020).