Atmospheric CO<sub>2</sub> source and sink patterns over the Indian region

Abstract

Abstract. In this paper we examine CO 2 emission hot spots and sink regions over India as identified from global model simulations during the period 2000-2009. CO 2 emission hot spots overlap with locations of densely clustered thermal power plants, coal mines and other industrial and urban centres; CO 2 sink regions coincide with the locations of dense forest. Fossil fuel CO 2 emissions are compared with two bottom-up inventories: the Regional Emission inventories in ASia (REAS v1.11;2000 and the Emission Database for Global Atmospheric Research (EDGAR v4.2) (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009). Estimated fossil fuel emissions over the hot spot region are ∼ 500-950 gC m −2 yr −1 as obtained from the global model simulation, EDGAR v4.2 and REAS v1.11 emission inventory. Simulated total fluxes show increasing trends, from 1.39 ± 1.01 % yr −1 (19.8 ± 1.9 TgC yr −1 ) to 6.7 ± 0.54 % yr −1 (97 ± 12 TgC yr −1 ) over the hot spot regions and decreasing trends of −0.95 ± 1.51 % yr −1 (−1 ± 2 TgC yr −1 ) to −5.7 ± 2.89 % yr −1 (−2.3 ± 2 TgC yr −1 ) over the sink regions. Model-simulated terrestrial ecosystem fluxes show decreasing trends (increasing CO 2 uptake) over the sink regions. Decreasing trends in terrestrial ecosystem fluxes imply that forest cover is increasing, which is consistent with India State of Forest Report (2009). Fossil fuel emissions show statistically significant increasing trends in all the data sets considered in this study. Estimated trend in simulated total fluxes over the Indian region is ∼ 4.72 ± 2.25 % yr −1 (25.6 TgC yr −1 ) which is slightly higher than global growth rate ∼ 3.1 % yr −1 during 2000-2010.

Reconstructing high-resolution in-situ vertical carbon dioxide profiles in the sparsely monitored Asian monsoon region

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Does the Asian Summer Monsoon Play a Role in the Stratospheric Aerosol Budget of the Arctic?

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Monitoring Anthropocene Epoch in the Mahanadi Basin and Chilika Lagoon, India.

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