气候变化领域集成服务门户(CCPortal): Estimating site-specific optimum air temperature and assessing its effect on the photosynthesis of grasslands in mid- To high-latitudes

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DOI	10.1088/1748-9326/ab70bb
	Estimating site-specific optimum air temperature and assessing its effect on the photosynthesis of grasslands in mid- To high-latitudes
	Chang Q.; Xiao X.; Wu X.; Doughty R.; Jiao W.; Bajgain R.; Qin Y.; Wang J.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	The effect of air temperature on photosynthesis is important for the terrestrial carbon cycle. The optimum air temperature for photosynthesis is one of the major parameters in data-driven and process-based photosynthesis models that estimate the gross primary production (GPP) of vegetation under a changing climate. To date, most models use the biome-specific optimum air temperature (Topt-s) parameter. To what degree will the site-specific optimum air temperature (Topt-s) affect GPP simulation results remains unclear. In this study, we estimated Topt-s by using GPP data from 11 grassland eddy flux tower sites (GPPEC) and satellite vegetation indices (NDVI and EVI). We found that T opt-s parameter values estimated from EVI have good consistency with those from GPPEC at individual sites. We also evaluated the effects of site-specific and biome-specific optimum air temperature parameters on grassland photosynthesis. The results showed that the use of Topt-s in the Vegetation Photosynthesis Model improved to various degrees in both daily and annual GPP estimates in those grassland flux tower sites. Our results highlight the necessity and potential for the use of Topt-s in terrestrial GPP models, especially in those situations with large temperature variation (heatwave and cold spill events). © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	eddy flux tower sites; EVI; gross primary productivity; vegetation productivity model
语种	英语
scopus关键词	Atmospheric temperature; Climate models; Scattering parameters; Vegetation; Changing climate; Eddy fluxes; Gross primary production; Gross primary productivity; Large temperature variations; Satellite vegetation; Terrestrial carbon cycle; Vegetation productivity; Photosynthesis; air temperature; eddy covariance; grassland; latitudinal gradient; NDVI; net primary production; photosynthesis; satellite altimetry; vegetation dynamics
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154200
作者单位	Department of Microbiology and Plant Biology, Center for Spatial Analysis, University of Oklahoma, Norman, OK 73019, United States; Department of Earth Sciences, Indiana University-Purdue University Indianapolis (IUPUI), Indianapolis, IN 46202, United States
推荐引用方式 GB/T 7714	Chang Q.,Xiao X.,Wu X.,et al. Estimating site-specific optimum air temperature and assessing its effect on the photosynthesis of grasslands in mid- To high-latitudes[J],2020,15(3).
APA	Chang Q..,Xiao X..,Wu X..,Doughty R..,Jiao W..,...&Wang J..(2020).Estimating site-specific optimum air temperature and assessing its effect on the photosynthesis of grasslands in mid- To high-latitudes.Environmental Research Letters,15(3).
MLA	Chang Q.,et al."Estimating site-specific optimum air temperature and assessing its effect on the photosynthesis of grasslands in mid- To high-latitudes".Environmental Research Letters 15.3(2020).