Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s12040-015-0576-7 |
Performance of WRF-Chem over Indian region: Comparison with measurements | |
Govardhan, Gaurav1; Nanjundiah, Ravi S.1,2; Satheesh, S. K.1,2; Krishnamoorthy, K.3; Kotamarthi, V. R.4 | |
通讯作者 | Nanjundiah, Ravi S. |
来源期刊 | JOURNAL OF EARTH SYSTEM SCIENCE |
ISSN | 2347-4327 |
EISSN | 0973-774X |
出版年 | 2015 |
卷号 | 124期号:4页码:875-896 |
英文摘要 | The aerosol mass concentrations over several Indian regions have been simulated using the online chemistry transport model, WRF-Chem, for two distinct seasons of 2011, representing the pre-monsoon (May) and post-monsoon (October) periods during the Indo-US joint experiment ’Ganges Valley Aerosol Experiment (GVAX)’. The simulated values were compared with concurrent measurements. It is found that the model systematically underestimates near-surface BC mass concentrations as well as columnar Aerosol Optical Depths (AODs) from the measurements. Examining this in the light of the model-simulated meteorological parameters, we notice the model overestimates both planetary boundary layer height (PBLH) and surface wind speeds, leading to deeper mixing and dispersion and hence lower surface concentrations of aerosols. Shortcoming in simulating rainfall pattern also has an impact through the scavenging effect. It also appears that the columnar AODs are influenced by the unrealistic emission scenarios in the model. Comparison with vertical profiles of BC obtained from aircraft-based measurements also shows a systematic underestimation by the model at all levels. It is seen that concentration of other aerosols, viz., dust and sea-salt are closely linked with meteorological conditions prevailing over the region. Dust is higher during pre-monsoon periods due to the prevalence of north-westerly winds that advect dust from deserts of west Asia into the Indo-Gangetic plain. Winds and rainfall influence sea-salt concentrations. Thus, the unrealistic simulation of wind and rainfall leads to model simulated dust and sea-salt also to deviate from the real values; which together with BC also causes underperformance of the model with regard to columnar AOD. It appears that for better simulations of aerosols over Indian region, the model needs an improvement in the simulation of the meteorology. |
英文关键词 | Aerosols black carbon modelling |
类型 | Article |
语种 | 英语 |
国家 | India ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000356458200015 |
WOS关键词 | AEROSOL BLACK CARBON ; FOSSIL-FUEL ; CLIMATE ; MODEL ; MONSOON ; SENSITIVITY ; SIMULATION ; SATELLITE ; DISTRIBUTIONS ; POLLUTION |
WOS类目 | Geosciences, Multidisciplinary ; Multidisciplinary Sciences |
WOS研究方向 | Geology ; Science & Technology - Other Topics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/188525 |
作者单位 | 1.Indian Inst Sci, Ctr Atmospher & Ocean Sci, Bengaluru 560012, Karnataka, India; 2.Indian Inst Sci, Divecha Ctr Climate Change, Bengaluru 560012, Karnataka, India; 3.Indian Space Res Org Headquarters, Bengaluru 560231, India; 4.Argonne Natl Lab, Div Environm Sci, Climate Res Sect, Argonne, IL 60439 USA |
推荐引用方式 GB/T 7714 | Govardhan, Gaurav,Nanjundiah, Ravi S.,Satheesh, S. K.,et al. Performance of WRF-Chem over Indian region: Comparison with measurements[J],2015,124(4):875-896. |
APA | Govardhan, Gaurav,Nanjundiah, Ravi S.,Satheesh, S. K.,Krishnamoorthy, K.,&Kotamarthi, V. R..(2015).Performance of WRF-Chem over Indian region: Comparison with measurements.JOURNAL OF EARTH SYSTEM SCIENCE,124(4),875-896. |
MLA | Govardhan, Gaurav,et al."Performance of WRF-Chem over Indian region: Comparison with measurements".JOURNAL OF EARTH SYSTEM SCIENCE 124.4(2015):875-896. |
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