- Dona Paula, Goa, India.
- +91-0832- 2450327
- iiosc2020[at]nio[dot]org
| Abstract Submission No. | ABS-2022-08-0201 |
| Title of Abstract | Interannual variation and trend of atmospheric aerosol over the Northern Indian Ocean |
| Authors | Harshbardhan Kumar, Shani Tiwari* |
| Organisation | CSIR ⿿ National Institute of Oceanography |
| Address | CSIR - National Institute of Oceanography, Dona Paula, Goa, India Pincode: 403004 Mobile: 9451952997 E-mail: stiwari@nio.org |
| Country | India |
| Presentation | Oral |
| Abstract | Atmospheric aerosols are one of the crucial constituents of atmospheric pollutants and play a vital role in global climate change through the scattering and/or absorption of solar radiation, modification of cloud properties and hence hydrological cycle. Indian ocean is a unique platform for aerosol loading and serves as a natural laboratory to investigate the various aerosol characteristics and their complex interactions. Thus, in order to assess the evolution of aerosol parameters affecting climate change, a long-term trend analysis of aerosol characteristics is highly needed. With this objective, in the present study eighteen years (2003 ⿿ 2020) MODIS (Moderate resolution Imaging Spectroradiometer) derived aerosol parameters over the Northern Indian Ocean have been analyzed. A large spatial variation in aerosol loading is observed, having maximum mean aerosol optical depth (AOD) over the central-east/northern Arabian sea (i.e. AOD>0.52) and northern Bay of Bengal (i.e. AOD>0.56). Relatively higher AOD trend is found near the coastal region of the Indian landmass which is >0.005yr-1, suggesting a significant contribution of aerosol from the Indian subcontinent which is further confirmed by five days airmass back trajectories analysis indicating the importance of long-range transportation over the region. Further details of aerosol characteristics, their interannual variation and decadal scale trend will be discussed during the presentations. |