Assessment of drought severity in Khar Yamaat Nature Reserve Area using satellite derived drought indexes
Mongolia has experienced several extreme climate events during the past decades, including severe extreme droughts. The issue of drought is of paramount significance in our country of nomadic culture and nomadic pastoralism. The eighteen years (2001-2018) MODIS satellite indices, normalized differen...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
National University of Mongolia
2022-05-01
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| Series: | Mongolian Journal of Biological Sciences |
| Subjects: | |
| Online Access: | https://www.biotaxa.org/mjbs/article/view/60476 |
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| Summary: | Mongolia has experienced several extreme climate events during the past decades, including severe extreme droughts. The issue of drought is of paramount significance in our country of nomadic culture and nomadic pastoralism. The eighteen years (2001-2018) MODIS satellite indices, normalized difference vegetation index (NDVI), and normalized difference water index (NDWI) data were analyzed for Khar Yamaat Nature Reserve Area. The Normalized Difference Drought Index (NDDI), combines information from both the NDWI and NDVI. During the summer, over the average NDVI and NDWI were consistently lower (NDVI <0.2 and NDWI<-0.2) under drought conditions than under non-drought conditions (NDVI>0.6 and NDWI>0.4). NDVI values exhibited a quicker response to drought conditions than NDWI. |
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| ISSN: | 1684-3908 2225-4994 |