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Solid Earth An interactive open-access journal of the European Geosciences Union
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Volume 6, issue 4
Solid Earth, 6, 1185-1194, 2015
https://doi.org/10.5194/se-6-1185-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Solid Earth, 6, 1185-1194, 2015
https://doi.org/10.5194/se-6-1185-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 03 Nov 2015

Research article | 03 Nov 2015

MODIS normalized difference vegetation index (NDVI) and vegetation phenology dynamics in the Inner Mongolia grassland

Z. Gong1, K. Kawamura1,2, N. Ishikawa3, M. Goto4, T. Wulan5, D. Alateng6, T. Yin7, and Y. Ito1 Z. Gong et al.
  • 1Graduate School for International Development and Cooperation (IDEC), Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
  • 2The Research Center of Animal Science (RCAS), Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
  • 3Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
  • 4Faculty of Bioresources, Mie University, Tsu, Mie, Japan
  • 5Rangeland Survey and Design Institute of Inner Mongolia, Inner Mongolia Autonomous Region Office of agriculture and animal husbandry, Huhhot, Inner Mongolia, China
  • 6Biotechnology Research Center, Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Huhhot, Inner Mongolia, China
  • 7Research Institute of Economy, Trade and Industry, IAA, Tokyo, Japan

Abstract. The Inner Mongolia grassland, one of the most important grazing regions in China, has long been threatened by land degradation and desertification, mainly due to overgrazing. To understand vegetation responses over the last decade, this study evaluated trends in vegetation cover and phenology dynamics in the Inner Mongolia grassland by applying a normalized difference vegetation index (NDVI) time series obtained by the Terra Moderate Resolution Imaging Spectroradiometer (MODIS) during 2002–2014. The results showed that the cumulative annual NDVI increased to over 77.10 % in the permanent grassland region (2002–2014). The mean value of the total change showed that the start of season (SOS) date and the peak vegetation productivity date of the season (POS) had advanced by 5.79 and 2.43 days, respectively. The end of season (EOS) was delayed by 5.07 days. These changes lengthened the season by 10.86 days. Our results also confirmed that grassland changes are closely related to spring precipitation and increasing temperature at the early growing period because of global warming. Overall, productivity in the Inner Mongolia Autonomous Region tends to increase, but in some grassland areas with grazing, land degradation is ongoing.

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This study evaluated trends in vegetation cover and phenology dynamics in the Inner Mongolia grassland by applying a normalized difference vegetation index (NDVI) time series obtained by the Terra Moderate Resolution Imaging Spectroradiometer (MODIS) during 2002–2014. The positive trends of the cumulative annual NDVI (77.10%) could be interpreted as an increase in plant productivity in the Inner Mongolia permanent grassland. And the growing season has lengthened by 10.86 days.
This study evaluated trends in vegetation cover and phenology dynamics in the Inner Mongolia...
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