Greenhouse Gas Budget of Terrestrial Ecosystems in Monsoon Asia: A Process-Based Model Study for the Period 1901–2014
Terrestrial ecosystems, including both natural vegetation and croplands, in Monsoon Asia play important roles in the global greenhouse gas budget, but there remain large uncertainties in our present regional-scale accounting. In this study, we applied a process-based model, Vegetation Integrative SImulator for Trace gases (VISIT), to the Monsoon Asia region to simulate sinks and sources of CO2, CH4, and N2O in terrestrial ecosystems. From 1901 to 2014, temporal change and spatial distribution of these gases were simulated. The region was estimated as a net sink of CO2 (about a quarter of the global total), but emissions of CH4 and N2O largely offset the effect. Because of heterogeneity and variability in terrestrial processes, we recommend an integrated study to elucidate the total budget in this region.
KeywordsGHG emissions Monsoon Asia VISIT model
This study was partly supported by the grant-in-aid of Japan Society for Promotion of Science (KAKENHI No. 26281014).
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