- Dona Paula, Goa, India.
- +91-0832- 2450327
- iiosc2020[at]nio[dot]org
Abstract Submission No. | ABS-2022-08-0309 |
Title of Abstract | Composition and characteristics of atmospheric aerosols over North Indian Ocean and implication to surface ocean biogeochemical processes: A synthesis |
Authors | Ashwini Kumar*, B. Srinivas, M. A. Aswini, N. Rastogi, A. k. Sudheer |
Organisation | CSIR-National Institute of Oceanography |
Address | CSIR-NATIONAL INSTITUTE OF OCEANOGRAPHY, DONA PAULA PANJIM, Goa, India Pincode: 403004 Mobile: 9168493781 E-mail: ashwinikumarjha@gmail.com |
Country | India |
Presentation | Oral |
Abstract | The North Indian Ocean (NIO), mainly constituted of two basins - the Bay of Bengal (BOB) and Arabian Sea (ARS). Owing to its geographical location, NIO is vulnerable to the pollutants coming via atmospheric outflows from surrounding continental emissions. Several studies have documented on large scale continental outflow (natural and anthropogenic aerosols as well as pollutants e.g. trace gases, acidic species, trace metals) from surrounding arid/semi-arid region (Middle-east and Thar), densely populated Indo-Gangetic Plain and adjoining South East Asian region. This outflow consist of unique blend of processed aerosols which are potential supplier of essential macro and micro nutrients to surface waters of both basins. Input of nutrients via atmospheric outflow can significantly modulate the various biogeochemical processes within NIO, including primary productivity. It is thus, important to understand the linkage between aerosol chemistry and surface ocean biogeochemistry of NIO to better constrain their impact on climate change. Thus chemical characteristics and composition of aerosols over the NIO are very crucial. Post Indian Ocean Experiment (INDOEX) program, studies on the chemical characterization of aerosols over NIO had been intensified. There were dedicated cruise campaign undertaken to understand the distribution of chemical (inorganic and organic) species in aerosols on spatial as well as temporal scale. Here, we synthesize the results obtained from various studies (mainly cruise campaign based) undertaken to chemically characterize aerosol over NIO. In this study, we also attempt to quantify deposition fluxes of macro (reactive nitrogen, phosphate) and micro (trace metals) nutrients over NIO, and will discuss the related implications on the surface biogeochemical processes. |