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author:

Qiu, B. (Qiu, B..) [1] | Feng, M. (Feng, M..) [2] | Zhong, M. (Zhong, M..) [3] | Tang, Z. (Tang, Z..) [4] | Chen, C. (Chen, C..) [5]

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Abstract:

This paper aims to improve our knowledge of the complex vegetation-climate relationship in subtropical humid region in the context of global warming, by taking into considerations of spatio-temporal variation of both vegetation and climate change. A multi-resolution analysis (MRA) based on the wavelet transform (WT) is applied to examine the vegetation growth and its relationship with climate factors based on 250m 16-day composites MODIS vegetation EVI dataset in subtropical humid region of China over the period 2001-2010. A general greening up (68%) was observed over the period 2001-2010, as well as rather local negative trends. A trend toward global warming was also observed for the whole study region, whereas no obvious trend of precipitation is examined in most areas. Temperature generally has a positive influence on vegetation; with only very few negative EVI-temperature coefficients observed on the south portion principally due to changes in land use, land degradation, and cloud noise. However, nearly equally positive and negative EVI-rainfall relationship is observed on the inter-annual level, with negative coefficients principally observed in the northwest portion with abundant precipitation. Very strong positive relationship is observed between both EVI-temperature and EVI-precipitation at seasonal level. It is revealed that spatio-temporal variation of both vegetation and climate should be taken into considerations when analyzing the long-term effects of global climate change. Interactions between vegetation dynamics and climate variability must be studied through spatially and temporally explicit multi-scale analysis to investigate the influence of long-term climate change on the vegetation growth. © 2015 IEEE.

Keyword:

Climate change; Enhanced Vegetation Index (EVI); Non-stationary; Subtropical humid region; Vegetation dynamic; Wavelet transform

Community:

  • [ 1 ] [Qiu, B.]Spatial Information Research Centre of Fujian Province, Fuzhou University, Fuzhou, Fujian, 350002, China
  • [ 2 ] [Feng, M.]Spatial Information Research Centre of Fujian Province, Fuzhou University, Fuzhou, Fujian, 350002, China
  • [ 3 ] [Zhong, M.]Spatial Information Research Centre of Fujian Province, Fuzhou University, Fuzhou, Fujian, 350002, China
  • [ 4 ] [Tang, Z.]Community and Regional Planning Program, University of Nebraska-Lincoln, Lincoln, NE 68558, United States
  • [ 5 ] [Chen, C.]Spatial Information Research Centre of Fujian Province, Fuzhou University, Fuzhou, Fujian, 350002, China

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Source :

ICSDM 2015 - Proceedings 2015 2nd IEEE International Conference on Spatial Data Mining and Geographical Knowledge Services

Year: 2015

Page: 93-98

Language: English

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ESI Highly Cited Papers on the List: 0 Unfold All

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30 Days PV: 0

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