globalchange  > 气候变化事实与影响
DOI: 10.1016/j.jag.2014.11.006
Scopus记录号: 2-s2.0-84963791927
论文题名:
Monitoring the impact of aerosol contamination on the drought-induced decline of gross primary productivity
作者: Zhang Y; , Li W; , Zhu Q; , Chen H; , Fang X; , Zhang T; , Zhao P; , Peng C
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2015
卷: 36
起始页码: 30
结束页码: 40
语种: 英语
英文关键词: Aerosol ; Atmospheric contamination ; Cloud ; Fire disturbance ; Quality flag ; Vegetation response
Scopus关键词: aerosol formation ; atmospheric pollution ; cloud ; drought ; fire ; primary production ; vegetation dynamics
英文摘要: Southwestern China experienced a period of severe drought from September 2009 to May 2010. It led to widespread decline in the enhanced vegetation index (EVI) and gross primary productivity (GPP) in the springtime of 2010 (March to May). However, this study observed a spatial inconsistency between drought-impacted vegetation decline and the precipitation deficit. Significant aerosol loads that correspond to inconsistent areas were also observed during the drought period. After analyzing both MODIS GPP/NPP Collection 5 (C5) and the newer Collection 5.5 (C55) data, a large area observed to be experiencing GPP decline in the eastern part of the study area proved to be unreliable. Based on EVI data, after atmospherically contaminated data were screened from analysis, approximately 20% of the study area exhibited browning whereas 33% displayed no change or greening and the remaining area (approximately 47%) lacked sufficient data to document changing conditions. Correlation analysis showed that fire occurrences, aerosol optical depth, and precipitation anomalies during the two drought periods (from September to February and from March to May) all contributed to a decrease in GPP. C55 data remains vulnerable to aerosol contamination due to a much higher correlation coefficient with aerosol optical depth compared to C5 data. In the future, users of remotely sensed data should be cautious of and take into account impacts related to atmospheric contamination, even during drought periods. © 2014 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79586
Appears in Collections:气候变化事实与影响

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作者单位: Laboratory for Ecological Forecasting and Global Change, College of Forestry, Northwest AandF University, Yangling, Shaanxi, China; Key Laboratory of Mountain Ecological Restoration and Bioresource, Chengdu Institute of Biology, Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chinese Academy of Sciences, Chengdu, China; Center of CEF/ESCER, Department of Biology Sciences, University of Quebec at Montreal, C.P. 8888, Succ. Centre-Ville, Montreal, Canada; Department of Microbiology and Plant Biology, Center for Spatial Analysis, University of Oklahoma, Norman, OK, United States

Recommended Citation:
Zhang Y,, Li W,, Zhu Q,et al. Monitoring the impact of aerosol contamination on the drought-induced decline of gross primary productivity[J]. International Journal of Applied Earth Observation and Geoinformation,2015-01-01,36
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