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Blond, Nadege
- Simulation of Aerosol Fields over South Asia Using CHIMERE - Part-I:Spatio-Temporal Characteristics and Heterogeneity
Abstract Views :255 |
PDF Views:95
Authors
Affiliations
1 Department of Physics, Birla Institute of Technology, Mesra, Ranchi 835 215, IN
2 Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bengaluru 560 012, IN
3 Laboratoire Image Ville Environnement, UMR7362 CNRS, Université de Strasbourg, Strasbourg, FR
4 ISRO HQ, Antariksh Bhavan, Bengaluru 560 231, IN
1 Department of Physics, Birla Institute of Technology, Mesra, Ranchi 835 215, IN
2 Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bengaluru 560 012, IN
3 Laboratoire Image Ville Environnement, UMR7362 CNRS, Université de Strasbourg, Strasbourg, FR
4 ISRO HQ, Antariksh Bhavan, Bengaluru 560 231, IN
Source
Current Science, Vol 111, No 1 (2016), Pagination: 76-82Abstract
In order to understand the regional climate implications of aerosols over Indo-Gangetic Plains (IGP), a major Indo-US field experiment, Ganges Valley Aerosol Experiment (GVAX) was conducted during 2011-12. Atmospheric Radiation Measurement (ARM) mobile facility (AMF) was deployed at the northern Indo-Gangetic Plain over the high-altitude site, Manora Peak, Nainital (29°21'33.84"N, 79°27'29.27"E, 1980 m amsl) in Central Himalayas, for an year-round measurement of aerosols, clouds and other climate-relevant atmospheric parameters. One of the objectives of GVAX was examining the ability of models to simulate aerosols over Indian region and validate the simulations. In part-1 of this two-part paper, we examine use of the chemical transport model 'CHIMERE' to simulate aerosol fields over Indian region (4-37.5°N; 67-88.5°E) for multiple years (2006, 2007 and 2008) by simulating the spatial and temporal distribution of PM10, BC mass concentrations and OC/BC ratios. It is seen that the model successfully captures the broad features of the regional distribution of aerosols, including the most conspicuous IGP hotspot and its seasonality.Keywords
Aerosols, Black Carbon, Chemistry Transport Model, CHIMERE, GVAX.Full Text
- Simulation of Aerosol Fields over South Asia Using CHIMERE - Part-II:Performance Evaluation
Abstract Views :250 |
PDF Views:124
Authors
Affiliations
1 Department of Physics, Birla Institute of Technology, Mesra, Ranchi 835 215, IN
2 Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bengaluru 560 012, IN
3 Laboratoire Image Ville Environnement, UMR7362 CNRS, Université de Strasbourg, Strasbourg, FR
4 ISRO HQ, Antariksh Bhavan, Bengaluru 560 231, IN
1 Department of Physics, Birla Institute of Technology, Mesra, Ranchi 835 215, IN
2 Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bengaluru 560 012, IN
3 Laboratoire Image Ville Environnement, UMR7362 CNRS, Université de Strasbourg, Strasbourg, FR
4 ISRO HQ, Antariksh Bhavan, Bengaluru 560 231, IN
Source
Current Science, Vol 111, No 1 (2016), Pagination: 83-92Abstract
In this paper, we evaluate the performance of the chemical transport model 'CHIMERE' over large Indian region (4-37.5°N; 67-88.5°E) for multiple years (2006, 2007 and 2008) by comparing the model simulations with concurrent aerosol measurements from different locations. Model simulated near-surface black carbon mass concentrations agreed satisfactorily with measurements at various locations (oceanic, inland and island sites), in general, except during monsoon months, when the model underpredicted the measurements. Similar results were obtained when model simulated column integrated PM10 mass concentrations were correlated with MODIS-derived aerosol optical depth (AOD), using AOD as a proxy for aerosol loading. The underperformance of the model during monsoon arises, at least partly, due to the model-simulated rainfall being higher than the actual rainfall over the Indian domain, during the monsoon season. Notwithstanding these, the general performance of the CHIMERE model to simulate aerosol loading over Indian domain during dry months is, in general, found to be satisfactory.Keywords
Aerosols, Black Carbon, Chemistry Transport Model.Full Text