气候变化领域集成服务门户(CCPortal): An efficient algorithm for calculating photosynthetically active radiation with MODIS products

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DOI	10.1016/j.rse.2017.03.028
	An efficient algorithm for calculating photosynthetically active radiation with MODIS products
	Tang Wenjun; Qin Jun; Yang Kun; Niu Xiaolei; Min Min; Liang Shunlin
通讯作者	Tang, WJ (通讯作者)
发表日期	2017
ISSN	0034-4257
EISSN	1879-0704
起始页码	146
结束页码	154
卷号	194
英文摘要	Photosynthetically active radiation (PAR) is the critical forcing data in ecological and agricultural fields. Remote sensing can be utilized to derive spatiotemporally continuous PAR. Empirical algorithms can be used to quickly retrieve surface PAR data sets, but their accuracy cannot be guaranteed in regions without local calibration. Physical algorithms generally incorporate all relevant physical processes and can be used globally, but their computational efficiency is often low. In this paper, an efficient algorithm is developed to calculate surface PAR by combining a clear-sky PAR model and the parameterizations for cloud transmittances. In the algorithm, the transmittances for water vapor, ozone, Rayleigh, aerosol, and cloud are each handled across the whole PAR band (400700 nm). In addition, the contribution of the multiple reflections between surface ground and the atmosphere are also expressly considered. The new algorithm is applied to estimate instantaneous PAR with inputs from Moderate Resolution Imaging Spectroradiometer (MODIS) products onboard both Terra and Aqua platforms. The daily PAR is estimated from these two instantaneous values by an upscaling method. The instantaneous and daily PAR estimates were validated with in situ data collected in the USA and China. The results indicate that the new algorithm, based on MODIS products, can effectively retrieve PAR with root mean square errors (RMSE) of about 40 W m(-2) and 15 W m(-2) at instantaneous and daily-mean time scales, respectively. These performances are generally better than those of previous studies. (C) 2017 Elsevier Inc. All rights reserved.
关键词	SURFACE SOLAR IRRADIANCE SATELLITE PAR CLOUD
英文关键词	Photosynthetically active radiation; Radiative transfer; Algorithm; MODIS
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000401888600011
来源期刊	REMOTE SENSING OF ENVIRONMENT
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/259071
推荐引用方式 GB/T 7714	Tang Wenjun,Qin Jun,Yang Kun,et al. An efficient algorithm for calculating photosynthetically active radiation with MODIS products[J]. 中国科学院青藏高原研究所,2017,194.
APA	Tang Wenjun,Qin Jun,Yang Kun,Niu Xiaolei,Min Min,&Liang Shunlin.(2017).An efficient algorithm for calculating photosynthetically active radiation with MODIS products.REMOTE SENSING OF ENVIRONMENT,194.
MLA	Tang Wenjun,et al."An efficient algorithm for calculating photosynthetically active radiation with MODIS products".REMOTE SENSING OF ENVIRONMENT 194(2017).