Detection of dry lake beds formation and estimate of environmental regime shift in semi-arid region

• HOSHINO Buho

  The Graduate School of Dairy Sciences, Rakuno Gakuen University, Ebetsu, Japan

• SOFUE Yuki

  The Graduate School of Sciences, Chiba University, Chiba, Japan

• DEMURA Yuta

  Field Researchers Corporation CO. Ltd, Sapporo, Hokkaido, Japan

• PUREVSUREN Tsedendamba

  The Graduate School of Dairy Sciences, Rakuno Gakuen University, Ebetsu, Japan

• KURIBAYASHI Morine

  The Graduate School of Dairy Sciences, Rakuno Gakuen University, Ebetsu, Japan

• BABA Kenji

  The Graduate School of Dairy Sciences, Rakuno Gakuen University, Ebetsu, Japan

• ZOLJARGAL Enkhtuvshin

  Mongolian Hydrological, Meteorological and Environmental Center of Sainshand, Mongolia

• HAGIWARA Katsuro

  The Graduate School of Veterinary Sciences, Rakuno Gakuen University, Ebetsu, Japan

• NODA Jun

  The Graduate School of Veterinary Sciences, Rakuno Gakuen University, Ebetsu, Japan

• KAWANO Keiichi

  Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology, Chitose, Japan

• KARTHAUS Olaf

  Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology, Chitose, Japan

• KAI Kenji

  Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan

抄録

In the Inner Asian Gobi desert, vegetation distribution mainly has annual herbs and perennial shrubs. Annual plants strongly depend on rainfall, and perennial plants can survive even in years of extreme drought. In this study, we used remote sensing method and field experiment method, to extract the area where regime shift had occurred in semi-arid region and to estimate the critical wind speed of dust emission from dry lake beds and desert steppe. Hovmoller diagrams are efficient for displaying large amounts of data in a meaningful manner. Hovmoller (time-longitude) diagrams were generated to summarize and examine the space-time features of seasonal evolution and the anomaly patterns for the entire monthly time series during 1985-2013. Because of analyzing the Hovmoller diagrams generated using vegetation index and precipitation data, NDVI values tended to increase with increasing precipitation during the vegetation growth period (VGP) between May and September. Vegetation showed high response to precipitation during the VGP. Moreover, the results of this study showed that the areas with less precipitation were more sensitive to the dynamics of precipitation than the areas with more precipitation. The most degraded area was the southwest region of Gobi with the least precipitation. The NDVI values responded to precipitation over vast areas including Inner Mongolia, China. In some areas, we estimated that the ecosystem has been destroyed and regime shift of ecosystem had occurred.

収録刊行物

• 沙漠研究

  沙漠研究 28 (S), 109-113, 2018-12-25

  日本沙漠学会

キーワード

• environmental regime shifts
• the critical wind speed
• dust emission from dry steppe
• Hovmoller diagrams

詳細情報

• CRID: 1390564238076476416
• NII論文ID: 130007593725
• DOI: 10.14976/jals.28.s_109
• ISSN: 21891761
• ISSN: 09176985
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可