A5027980792- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Ocean Waves and Remote Sensing
- Underwater Acoustics Research
- Tropical and Extratropical Cyclones Research
- Isotope Analysis in Ecology
- Ocean Acidification Effects and Responses
- Cryospheric studies and observations
- Polar Research and Ecology
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Water Quality Monitoring Technologies
- Coral and Marine Ecosystems Studies
- Microbial Community Ecology and Physiology
- Climate change and permafrost
Ministry of Earth Sciences
2014-2024
Government of India
2024
Indian Institute of Science Bangalore
2018-2024
National Centre for Antarctic and Ocean Research
2012-2024
National Remote Sensing Centre
2024
Kuwait Institute for Scientific Research
2024
National Institute of Ocean Technology
2018
Abstract The Bay of Bengal (BoB) plays a fundamental role in controlling the weather systems that make up South Asian summer monsoon system. In particular, southern BoB has cooler sea surface temperatures (SST) influence ocean–atmosphere interaction and impact monsoon. Compared to southeastern BoB, southwestern is cooler, more saline, receives much less rain, influenced by current (SMC). To examine these features on monsoon, Boundary Layer Experiment (BoBBLE) was jointly undertaken India...
Abstract Sea surface temperature (SST) is a fundamental driver of tropical weather systems such as monsoon rainfall and cyclones. However, understanding the factors that control SST variability lacking, especially during monsoons when in situ observations are sparse. Here we use ground-breaking observational approach to determine controls on southern Bay Bengal. We achieve this through first full closure ocean mixed layer energy budget derived entirely from Bengal Boundary Layer Experiment...
Abstract During the Bay of Bengal (BoB) Boundary Layer Experiment (BoBBLE) in southern BoB, time series microstructure measurements were obtained at 8°N, 89°E from 4 to 14 July 2016. These observations captured events barrier layer (BL) erosion and reformation. Initially, a three-layer structure was observed: fresh surface mixed (ML) thickness 10–20 m; BL below 30–40-m with similar temperature but higher salinity; high salinity core layer, associated Summer Monsoon Current. Each these three...
Abstract The inflow of high-saline water from the Arabian Sea (AS) into Bay Bengal (BoB) and its subsequent mixing with relatively fresh BoB is vital for north Indian Ocean salt budget. During June–September, Summer Monsoon Current carries high-salinity AS to BoB. A time series microstructure hydrographic data collected 4 14 July 2016 in southern (8°N, 89°E) showed presence a subsurface (60–150 m) core. core was composed warm saline overlying cold water. lower part double-diffusive fingering...
Seychelles-Chagos Thermocline Ridge (SCTR, 5-10S, 50-75E) in the southwestern tropical Indian Ocean is a unique area that experiences year-round upwelling.This response to upward Ekman pumping prevalent region.Satellite data, model data and objectively analysed Argo temperature/ salinity have been used study seasonal surface chlorophyll (chl a) variability SCTR.Variability of chl concentration SCTR showed weak semiannual signature.The western part (WSCTR, 50-62E) characterized by...
High saline and cold Antarctic Bottom Water (AABW) forms around the continental margin of Antarctica that ventilates into global ocean. To study recent changes in AABW, we have analyzed situ observations collected from Indian Ocean expeditions to Southern during 2010, 2011, 2017, 2018, 2020. A comprehensive analysis these indicated freshening, warming, contraction layer thickness AABW. Even though AABW depicted inter-annual variability, it changed moderately fresher lighter water mass at end...
This study aims to describe the planktonic food web structure with respect phytoplankton biomass (chlorophyll a ) and prevailing environmental conditions at South Subtropical Front (SSTF) Polar (PF) in Indian sector of Southern Ocean. Sampling was carried out each front for 72 hrs, 6-hr intervals, during austral summer 2011. Considerable variations were observed hydrography between these two fronts. A strong temperature minimum layer PF. Although surface primary production chlorophyll values...