数字农科院2.0

GLOBAL WATER VAPOR CONTENT AND VEGETATION CHANGE ANALYSIS BASED ON REMOTE SENSING DATA

文献类型： 外文期刊

作者： Mao, K. B.;Ma, Y.;Zuo, Z. Y.;Liu, Q.;Mao, K. B.;Mao, K. B.;Jiao, Y. Q.;Mao, K. B.;Ma, Y.;Wang, F.;Sun, Z. W.

作者机构：

关键词： Water vapor content;vegetation;climate;global

期刊名称： 2016 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)

ISSN： 2153-6996

年卷期： 2016 年

页码：

收录情况： SCI

摘要： Water vapor in the Earth's upper atmosphere plays a crucial role in the radiative balance, hydrological process, and climate change. Based on the latest MODIS data, this study probes the spatio-temporal variations of global water vapor content in the past decade. It is found that overall the global water vapor concentrations declined over 2003-2012 (b=0.0149, R-2=0.797, p=0.0005). The decreasing trend over the ocean surface (b=-0.017, R-2=0.824, p=0.0003) is more explicit than over terrestrial surface (b=-0.010, R-2=0.612, p=0.007), more significant over the Northern Hemisphere (b=-0.0175, R-2=0.852, p=0.0001) than over the Southern Hemisphere (b=-0.0123, R-2=0.682, p=0.003). Vegetation cover change is critical for an understanding of the impacts and responses of vegetation to climate change. The global vegetation growth has been analysised from 2001to 2012. After thorough analysis based on satellite data, we find evidence that the global vegetation change little, and it is increasing slightly in Northern hemisphere while it is deceasing slightly in Southern Hemisphere. For different latitudes, the vegetation is increasing 0.17% every year from 60 degrees N to 70 degrees N (R-2=0.47, P>0.013), while the vegetation is decreasing 0.11% every year from 10 degrees N to 10 degrees S (R-2=0.54, P>0.004). For different continents, the vegetation in South America is decreasing 0.16% every year (R-2=0.78, P>0.0001) and it is increasing 0.05% every year in Asia (R-2=0.28, P>0.072) and 0.25% every year in Oceania (R-2=0.24, P>0.1).

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