Dynamic monitoring of desertification in response to climatic factors: a case study from the Gelintan Oasis on the southeastern edge of the Tengger Desert, China

Abstract

This study used GIS and remote sensing to establish DDI model based on vegetation cover Index (NDVI) and Surface Albedo (Albedo) normalization to evaluate in the Gelintan Oasis of Inner Mongolia past 30 years. Use Jenks Natural Breaks Method classified as undesertified land, slightly desertified land, moderately desertified land and severely desertified land. Used the Mann-Kendall test, the impact of climate change on land desertification in the study area was discussed. The results showed that, the Gelintan Oasis consisted primarily of moderately desertified land but the dominant land type shifted to severely desertified land from 2006 to 2016; Moderately desertified land occurs in the desert-oasis ecotone; Moderately desertified land showed pronounced expansions and contractions in area. In the future, we hope to provide more perfect data support for desertification control by using longer time series data to explore the relationship between desertification and climatic or human factors.