IGSNRR OpenIR
droughtimpactsonvegetationindicesandproductivityofterrestrialecosystemsinsouthwesternchinaduring20012012
Zhou Lei1; Wang Shaoqiang2; Chi Yonggang1; Wang Junbang2
2018
Source Publicationchinesegeographicalscience
ISSN1002-0063
Volume028Issue:005Pages:784
AbstractDrought, as a recurring extreme climate event, affects the structure, function, and process of terrestrial ecosystems. Despite the increasing occurrence and intensity of the drought in the past decade in Southwestern China, the impacts of continuous drought events on vegetation in this region remain unclear. During 2001–2012, Southwestern China experienced the severe drought events from 2009 to 2011. Our aim is to characterize drought conditions in the Southwestern China and explore the impacts on the vegetation condition and terrestrial ecosystem productivity. The Standardized Precipitation Index(SPI) was used to characterize drought area and intensity and a light-use efficiency model was used to explore the effect of drought on the terrestrial ecosystem productivity with Moderate Resolution Imaging Spectrometer(MODIS) data. The SPI captured the major drought events in Southwestern China during the study period, indicated that the 12-year period of this study included both ‘normal' precipitation years and two severe drought events in 2009–2010 and 2011. Results showed that vegetation greenness(Normalized Difference Vegetation Index, NDVI and Enhanced Vegetation Index, EVI) both declined in 2009/2010 drought, but the 2011 drought resulted in less declines of vegetation greenness and productivity due to shorten drought duration and rising temperature. Meanwhile, it was about 5 months lapse between drought events and maximum declines in vegetation greenness for 2009/2010 drought events. In addition, forest, grassland and cropland revealed significant different ecosystem responses to drought. It indicated that grassland showed an early sensitivity to drought, while cropland was the most sensitive to water deficit and forest was more resilient to drought. This study suggests that it is necessary to detect the difference responses of ecosystem to drought in a regional area with satellite data and ecosystem model.
Language英语
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/80037
Collection中国科学院地理科学与资源研究所
Affiliation1.浙江师范大学
2.中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Zhou Lei,Wang Shaoqiang,Chi Yonggang,et al. droughtimpactsonvegetationindicesandproductivityofterrestrialecosystemsinsouthwesternchinaduring20012012[J]. chinesegeographicalscience,2018,028(005):784.
APA Zhou Lei,Wang Shaoqiang,Chi Yonggang,&Wang Junbang.(2018).droughtimpactsonvegetationindicesandproductivityofterrestrialecosystemsinsouthwesternchinaduring20012012.chinesegeographicalscience,028(005),784.
MLA Zhou Lei,et al."droughtimpactsonvegetationindicesandproductivityofterrestrialecosystemsinsouthwesternchinaduring20012012".chinesegeographicalscience 028.005(2018):784.
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