| Spatial and seasonal characterization of net primary productivity and climate variables in southeastern China using MODIS data. | |
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MedLine Citation:
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PMID: 20349524 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We developed a sophisticated method to depict the spatial and seasonal characterization of net primary productivity (NPP) and climate variables. The role of climate variability in the seasonal variation of NPP exerts delayed and continuous effects. This study expands on this by mapping the seasonal characterization of NPP and climate variables from space using geographic information system (GIS) technology at the pixel level. Our approach was developed in southeastern China using moderate-resolution imaging spectroradiometer (MODIS) data. The results showed that air temperature, precipitation and sunshine percentage contributed significantly to seasonal variation of NPP. In the northern portion of the study area, a significant positive 32-d lagged correlation was observed between seasonal variation of NPP and climate (P<0.01), and the influences of changing climate on NPP lasted for 48 d or 64 d. In central southeastern China, NPP showed 16-d, 48-d, and 96-d lagged correlation with air temperature, precipitation, and sunshine percentage, respectively (P<0.01); the influences of air temperature and precipitation on NPP lasted for 48 d or 64 d, while sunshine influence on NPP only persisted for 16 d. Due to complex topography and vegetation distribution in the southern part of the study region, the spatial patterns of vegetation-climate relationship became complicated and diversiform, especially for precipitation influences on NPP. In the northern part of the study area, all vegetation NPP had an almost similar response to seasonal variation of air temperature except for broad crops. The impacts of seasonal variation of precipitation and sunshine on broad and cereal crop NPP were slightly different from other vegetation NPP. |
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Authors:
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Dai-liang Peng; Jing-feng Huang; Alfredo R Huete; Tai-ming Yang; Ping Gao; Yan-chun Chen; Hui Chen; Jun Li; Zhan-yu Liu |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of Zhejiang University. Science. B Volume: 11 ISSN: 1862-1783 ISO Abbreviation: J Zhejiang Univ Sci B Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-29 Completed Date: 2010-07-14 Revised Date: 2013-05-29 |
Medline Journal Info:
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Nlm Unique ID: 101236535 Medline TA: J Zhejiang Univ Sci B Country: China |
Other Details:
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Languages: eng Pagination: 275-85 Citation Subset: IM |
Affiliation:
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Institute of Agricultural Remote Sensing and Information Application, Zhejiang University, Hangzhou 310029, China. pdlzju@yahoo.com.cn |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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China Climate* Conservation of Natural Resources Environmental Monitoring / methods Geographic Information Systems Models, Statistical Models, Theoretical Rain Regression Analysis Seasons Temperature Time Factors Weather |
| Comments/Corrections | |
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