11:00 AM - 11:15 AM
[HCG22-08] Evaluation of Carbon Sequestration for Different Land Covers in Mongolia
Keywords:Land Cover, Carbon Sequestration, Resilience of Ecosystem, Grazing Density
We found that (1) carbon sequestration by both vegetation (NPP) and ecosystems (NEP) increased totally in whole country from 2000 to 2016. Water deficit index (WDI) was the most important driving factor in dry steppe and semi-desert steppe, however, land surface temperature (LST) was the most in forest and meadow steppe; (2) time series trend analysis indicated that areas showing positive trends are most widespread towards the northern and northeastern Mongolia, as well as in the Gobi desert in southern Mongolia. Negative trends are spread mainly in the central Mongolia, around the capital city, Ulaanbaatar, where grass land has seriously degraded due to heavy grazing, although these areas originally have a high capacity of carbon sequestration.
Overall, our results indicate that vegetation cover and carbon sequestration appear to be positively correlated with each other, which is highly sensitive to precipitation fluctuation in the arid area of southern Mongolia, but sensitive to grazing intensity in the semi-arid area of central Mongolia. Thus, we can come to a conclusion that the land cover in Mongolia are vulnerable to both climate change and intensive grazing, well management or strict-control of livestock numbers would be one of the most effective adaptation countermeasures for the resilience of ecosystem carbon sequestration.
This study was supported by the project “Development of Innovative Adaptation System and MRV Method for JCM in Mongolia" (2015-present), funded by Ministry of the Environment, Japan.