Arid
DOI10.3390/rs9060530
Global Analysis of Bioclimatic Controls on Ecosystem Productivity Using Satellite Observations of Solar-Induced Chlorophyll Fluorescence
Madani, Nima1,2,5; Kimball, John S.1,2; Jones, Lucas A.1,2; Parazoo, Nicholas C.3; Guan, Kaiyu4,5
通讯作者Madani, Nima
来源期刊REMOTE SENSING
ISSN2072-4292
出版年2017
卷号9期号:6
英文摘要

Ecosystem productivity models rely on regional climatic information to estimate temperature and moisture constraints influencing plant growth. However, the productivity response to these environmental factors is uncertain at the global scale and has largely been defined using limited observations from sparse monitoring sites, including carbon flux towers. Recent studies have shown that satellite observations of Solar-Induced chlorophyll Fluorescence (SIF) are highly correlated with ecosystem Gross Primary Productivity (GPP). Here, we use a relatively long-term global SIF observational record from the Global Ozone Monitoring Experiment-2 (GOME-2) sensors to investigate the relationships between SIF, used as a proxy for GPP, and selected bio-climatic factors constraining plant growth at the global scale. We compared the satellite SIF retrievals with collocated GPP observations from a global network of tower carbon flux monitoring sites and surface meteorological data from model reanalysis, including soil moisture, Vapor Pressure Deficit (VPD), and minimum daily air temperature (Tmin). We found strong correspondence (R-2 > 80%) between SIF and GPP monthly climatologies for tower sites characterized by mixed, deciduous broadleaf, evergreen needleleaf forests, and croplands. For other land cover types including savanna, shrubland, and evergreen broadleaf forest, SIF showed significant but higher variability in correlations between sites. In order to analyze temperature and moisture related effects on ecosystem productivity, we divided SIF by photosynthetically active radiation (SIFp) and examined partial correlations between SIFp and the climatic factors across a global range of flux tower sites, and over broader regional and global extents. We found that productivity in arid ecosystems is more strongly controlled by soil water content to an extent that soil moisture explains a higher proportion of the seasonal cycle in productivity than VPD. At the global scale, ecosystem productivity is affected by joint climatic constraint factors so that VPD, Tmin, and soil moisture were significant (p < 0.05) controls over 60, 59, and 35 percent of the global domain, respectively. Our study identifies and confirms dominant climate control factors influencing productivity at the global scale indicated from satellite SIF observations. The results are generally consistent with climate response characteristics indicated from sparse global tower observations, while providing more extensive coverage for verifying and refining global carbon and climate model assumptions and predictions.


英文关键词ecosystem productivity FLUXNET GPP MODIS-MOD17 phenology SIF SMAP-L4C
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000404623900021
WOS关键词NET PRIMARY PRODUCTION ; LIGHT-USE EFFICIENCY ; CARBON-DIOXIDE UPTAKE ; TERRESTRIAL GROSS ; VEGETATION ; FORESTS ; CLIMATE ; PHOTOSYNTHESIS ; PHENOLOGY ; BOREAL
WOS类目Remote Sensing
WOS研究方向Remote Sensing
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/201943
作者单位1.Univ Montana, Coll Forestry & Conservat, Numer Terradynam Simulat Grp, Missoula, MT 59812 USA;
2.Univ Montana, Dept Ecosyst & Conservat Sci, Coll Forestry Conservat, Missoula, MT 59812 USA;
3.Jet Prop Lab, 4800 Oak Grove Dr,Mail Stop 200-233, Pasadena, CA 91109 USA;
4.Univ Illinois, Dept Nat Resources & Environm Sci, Urbana, IL 61801 USA;
5.Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61801 USA
推荐引用方式
GB/T 7714
Madani, Nima,Kimball, John S.,Jones, Lucas A.,et al. Global Analysis of Bioclimatic Controls on Ecosystem Productivity Using Satellite Observations of Solar-Induced Chlorophyll Fluorescence[J],2017,9(6).
APA Madani, Nima,Kimball, John S.,Jones, Lucas A.,Parazoo, Nicholas C.,&Guan, Kaiyu.(2017).Global Analysis of Bioclimatic Controls on Ecosystem Productivity Using Satellite Observations of Solar-Induced Chlorophyll Fluorescence.REMOTE SENSING,9(6).
MLA Madani, Nima,et al."Global Analysis of Bioclimatic Controls on Ecosystem Productivity Using Satellite Observations of Solar-Induced Chlorophyll Fluorescence".REMOTE SENSING 9.6(2017).
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