气候变化领域集成服务门户(CCPortal): An Improved Algorithm for Estimating Surface Shortwave Radiation: Preliminary Evaluation With MODIS Products

CCPortal

DOI	10.1109/TGRS.2021.3098742
	An Improved Algorithm for Estimating Surface Shortwave Radiation: Preliminary Evaluation With MODIS Products
	Li, Jun; Tang, Wenjun; Yang, Kun; Xie, Yu; Gueymard, Christian A.; Qin, Jun; Sengupta, Manajit
通讯作者	Tang, WJ (通讯作者)
发表日期	2022
ISSN	0196-2892
EISSN	1558-0644
卷号	60
英文摘要	Cloud parameters, as key inputs in radiative transfer algorithms, have a critical impact on surface shortwave radiation (SSR) computation. By introducing a parameterization of cloud transmittance and reflectance, based on radiative transfer simulations, this study improves the accuracy of an existing physically based model which severely underestimates SSR under thick cloud conditions. The cloud parameterization adopts the single-layer cloud model and simulates cloud transmittances and reflectances by varying cloud optical thickness, cloud particle size, and solar zenith angle. The revised model is applied to estimate instantaneous SSR using Moderate-resolution Imaging Spectroradiometer (MODIS) atmospheric and land products. The retrieved SSR is evaluated against observation data from 41 Baseline Surface Radiation Network (BSRN) stations and is also compared with the MODIS official SSR product. The root mean square error (RMSE) of the estimated instantaneous radiation is approximately 52 and 98 W m(-2) under clear-sky and all-sky conditions, respectively. The accuracy of the improved parameterization is higher than that of the original model, and there is no obvious underestimation of SSR in the case of high cloud optical thickness. Therefore, the new algorithm improves the accuracy of SSR estimates in the presence of thick clouds. Retrievals with the improved model also achieve higher accuracy than the MODIS official SSR product (MCD18A1). Finally, the reliable performance of the scheme at most BSRN stations illustrates that the improved model can be used to map SSR on a global scale.
关键词	NARROW-BAND IRRADIANCES GLOBAL SOLAR-RADIATION SKY IRRADIANCE SATELLITE DATA MODEL PARAMETERIZATION VALIDATION FLUX
英文关键词	Algorithm; cloud parameterization; moderate-resolution imaging spectroradiometer (MODIS); surface shortwave radiation (SSR)
语种	英语
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000732791000001
来源期刊	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260709
推荐引用方式 GB/T 7714	Li, Jun,Tang, Wenjun,Yang, Kun,et al. An Improved Algorithm for Estimating Surface Shortwave Radiation: Preliminary Evaluation With MODIS Products[J]. 中国科学院青藏高原研究所,2022,60.
APA	Li, Jun.,Tang, Wenjun.,Yang, Kun.,Xie, Yu.,Gueymard, Christian A..,...&Sengupta, Manajit.(2022).An Improved Algorithm for Estimating Surface Shortwave Radiation: Preliminary Evaluation With MODIS Products.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,60.
MLA	Li, Jun,et al."An Improved Algorithm for Estimating Surface Shortwave Radiation: Preliminary Evaluation With MODIS Products".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 60(2022).