Land use/cover change and regional climate change in an arid grassland ecosystem of Inner Mongolia, China

文献类型: 外文期刊

第一作者: Li, Zhouyuan

作者: Li, Zhouyuan;Wu, Wenzhao;Liu, Xuehua;Liu, Xinchao;Li, Zhouyuan;Wu, Wenzhao;Liu, Xuehua;Liu, Xinchao;Li, Zhouyuan;Fath, Brian D.;Sun, Hailian;Liu, Xinchao;Sun, Hailian;Liu, Xinchao;Xiao, Xinru;Cao, Jun

作者机构:

关键词: Land use cover change;Climate change;Grassland;Correlation analysis;Remote sensing;Feedback;Evapotranspiration

期刊名称:ECOLOGICAL MODELLING ( 影响因子:2.974; 五年影响因子:3.264 )

ISSN:

年卷期:

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收录情况: SCI

摘要: Conserving and protecting the arid grassland ecosystem in Inner Mongolia under climate change requires large-scale observation and analysis. The interaction between land use/cover change (LUCC) and the regional climate change in this study area is addressed using macroscopic monitoring with remote sensing observation and analysis. The area's LUCC was examined to demonstrate the structural dynamics of the land surface in the past from 1988 to 2011. The results of LUCC showed that agricultural land, high coverage grassland, and low coverage grassland were the dominant land cover types taking approximately 65.3% in total. Developed land constantly increased from 1.4% to 12.7% during the study period due to rapid urbanization in the area. According to the land surface energy balance equations, the four key variables of the regional climate system, (1) normalized difference vegetation index (NDVI), (2) albedo (a), (3) surface temperature (Ts), and (4) evapotranspiration (ET), were calculated for their spatial-temporal pattern dynamic and also to perform a correlation analysis to explore the structure-function relationship in the land-atmosphere interaction. The results illustrated that vegetation degradation caused an increase in albedo by approximately 5% on average by 2007 as attributed to the cumulative effects of the drought since 2003. ET also declined to around 0.8 cm/day in 2007. The correlation analysis results suggested the human land use such as development and agricultural activities made the surface boundary layer less responsive in the land-atmosphere interaction. (C) 2016 Elsevier B.V. All rights reserved.

分类号: X17

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