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The Vegetation Dynamics and Climate Change Responses by Leaf Area Index in the Mu Us Desert

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  • Defeng Zheng

    (School of Urban and Environmental Science, Liaoning Normal University, Dalian 116029, China)

  • Yanhui Wang

    (School of Urban and Environmental Science, Liaoning Normal University, Dalian 116029, China)

  • Yanying Shao

    (Department of Geography, Changchun School Affiliated to Beijing Normal University, Changchun 130000, China)

  • Lixin Wang

    (Jilin Yinhe Water Conservancy Hydropower New Technology Design Co., Ltd., Changchun 130000, China)

Abstract

Knowing the long-dated dynamic changes of vegetation in the Mu Us Desert is critical for strengthening sustainable management of vegetation restoration projects in the next planned cycle until 2050. To predict leaf area indexes (LAIs) under long-dated climate scenarios (2013–2050) in the Mu Us Desert, the relationship between earlier meteorological data and LAI was tracked with regression analysis on the basis of LAI data from the Global Land Surface Satellite (GLASS) and the grid meteorological data during 1982–2012, and the LAIs were estimated based on five-Global Circulation Model (GCM) ensemble means under three representative concentration pathways (RCP 2.6, RCP 4.5 and RCP 8.5). We found an increasing trend in precipitation and a significant increase in potential evapotranspiration (PET) during the earlier period in the Mu Us Desert, and that could continue into the long-dated under three RCPs in the Mu Us Desert. Warming trends occur in the earlier and long-dated periods for annual average air temperature. Compared with the observations, the temperature rises respectively by 0.6 ℃, 0.7 ℃, and 1 ℃ under the three RCPs mentioned above. The annual maximum LAI largely increased with a rate-of-change of 0.029 m 2 ·m −2 ·yr -1 . Precipitation has been a major influencing factor to vegetation dynamics and growth in the Mu Us Desert. The permissible LAIs by 2050 are 0.42–0.88 m 2 ·m −2 , 0.42–0.87 m 2 ·m −2 , and 0.41–0.87 m 2 ·m −2 under the three RCPs, respectively. Contrasted with the baseline period (1982–2012), the LAI is found to be already close to the current value in the northwestern and southern Mu Us Desert.

Suggested Citation

  • Defeng Zheng & Yanhui Wang & Yanying Shao & Lixin Wang, 2019. "The Vegetation Dynamics and Climate Change Responses by Leaf Area Index in the Mu Us Desert," Sustainability, MDPI, vol. 11(11), pages 1-13, June.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:11:p:3151-:d:237210
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