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Atmosphere 2018, 9(10), 394; https://doi.org/10.3390/atmos9100394

Vegetation Dynamics and Diverse Responses to Extreme Climate Events in Different Vegetation Types of Inner Mongolia

1
School of Environment, Northeast Normal University, Changchun 130024, China
2
Key Laboratory for Vegetation Ecology, Ministry of Education, Changchun 130024, China
3
School of Geographical Sciences, Northeast Normal University, Changchun 130024, China
4
Collage of Geography, Inner Mongolia Normal University, Hohhot 010022, China
*
Author to whom correspondence should be addressed.
Received: 18 July 2018 / Revised: 24 September 2018 / Accepted: 26 September 2018 / Published: 11 October 2018
(This article belongs to the Special Issue Impacts of Air Quality and Climate Change on Vegetation)
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Abstract

As the global climate has changed, studies on the relationship between vegetation and climate have become crucial. We analyzed the long-term vegetation dynamics and diverse responses to extreme climate changes in Inner Mongolia, based on long-term Global Inventory Monitoring and Modelling Studies (GIMMS) NDVI3g datasets, as well as the eight extreme precipitation indices and six extreme temperature indices that are highly correlated with the occurrence of droughts or floods, heat or cold temperature disasters, and vegetation growth in Inner Mongolia. These datasets were analyzed using linear regression analysis, the Hurst exponent index, residual analysis, and the Pearson correlation analysis. The results showed the following: (1) The vegetation dynamical changes exhibited trends of improvement during 1982 to 2015, and 68% of the vegetation growth changes in Inner Mongolia can be explained by climate changes. (2) The extreme precipitation indices exhibited a slight change, except for the annual total wet–day precipitation (PRCPTOT). The occurrence of extreme cold temperatures showed a significant decline, while the occurrence of extreme warm temperatures showed an upward trend in Inner Mongolia. (3) The typical steppe, desert steppe, and forest steppe regions are more sensitive to extreme large precipitation, and the forest regions are more sensitive to extreme warm temperatures. (4) Extreme precipitation exhibits a one-month lagged effect on vegetation that is larger than the same-month effects on the grassland system. Extreme temperature exhibits same-month effects on vegetation, which are larger than the one-month lagged effects on the forest system. Therefore, studies of the relationship between extreme climate indices and vegetation are important for performing risk assessments of droughts, floods, and other related natural disasters. View Full-Text
Keywords: vegetation dynamics; Hurst exponent; extreme climate changes; different vegetation types; Inner Mongolia vegetation dynamics; Hurst exponent; extreme climate changes; different vegetation types; Inner Mongolia
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Na, L.; Na, R.; Zhang, J.; Tong, S.; Shan, Y.; Ying, H.; Li, X.; Bao, Y. Vegetation Dynamics and Diverse Responses to Extreme Climate Events in Different Vegetation Types of Inner Mongolia. Atmosphere 2018, 9, 394.

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