Indian scientists on a South African vessel are in Antarctica, midway through an expedition across the Southern Ocean.
About the expedition
- This is the 11th expedition of an Indian mission to the Southern Ocean, or Antarctic Ocean. The first mission took place between January and March 2004.
- Onboard the vessel is 34 scientific staff from India, apart from technical hands, seamen and a chef who are all from South Africa.
- It contains the 18-institution team from India led by Dr. Anoop Mahajan from the Indian Institute of Tropical Meteorology, Pune
- The vessel SA Agulhas is from South African oceanographic research vessel. It set off from Port Louise in Mauritius, on a two-month Indian Scientific Expedition to the Southern Ocean 2020.
- Currently, the vessel is at Prydz Bay, in the coastal waters of “Bharati” which is India’s third station in Antarctica.
The objective of the mission
- A key objective of the mission is to quantify changes that are occurring and the impact of these changes on large-scale weather phenomenon, like the Indian monsoon, through teleconnections
- It aims to understand the influence of the Southern Ocean across the ecosystem and atmospheric changes and how it affects the tropical climate and weather conditions.
- Collecting air and water samples from around 60 stations along the cruise track.
Six core projects under the mission
- Study hydrodynamics and biogeochemistry of the Indian Ocean sector of the Southern Ocean; involves sampling seawater at different depths. This will help understand the formation of Antarctic bottom water.
- Observations of trace gases in the atmosphere, such as halogens and dimethyl sulfur from the ocean to the atmosphere. Will help improve parameterizations that are used in global models
- Study of organisms called coccolithophores that have existed in the oceans for several million years; their concentrations in sediments will create a picture of past climate.
- Investigate atmospheric aerosols and their optical and radiative properties. Continuous measurements will quantify the impact on Earth’s climate.
- Study the Southern Ocean’s impact on Indian monsoons. Look for signs in the sediment core taken from the bottom of the ocean.
- Dynamics of the food web in the Southern Ocean; important for safeguarding catch and planning sustainable fishing.
Significance of the research
- These will give valuable information on the state of the ocean and atmosphere in this remote environment and will help to understand its impacts on the climate.
- It will make us understand the gaseous cycle of GHGs by quantifying how much carbon dioxide is going to those regions, and how much is coming back.
- Understanding of how the climate system works through the oceans
The interrelation between Tropical and Polar climates
- As all oceans around the world are connected through the Southern Ocean, which acts as a transport agent for things like heat across all these oceans.
- The conveyor belt that circulates heat around the world is connected through the Southern Ocean and can have a large impact on how climate is going to change due to anthropogenic forces
- Carbon dioxide is getting emitted into the atmosphere, and through atmospheric circulation goes to the Antarctic and polar regions.
- Since the temperature is very low there, these gases are getting absorbed and converted into dissolved inorganic carbon or organic carbon, and through water masses and circulation it is coming back to tropical regions. Since it is warmer in these areas, it re-enters the atmosphere
Progress so far under the mission
- The mission has extracted one of the largest sediment cores from the Southern Ocean measuring 3.4 meters.
- The sediment core can help us understand the past climate and aid in understanding how the climate is going to change in the future.
India’s research stations in Antarctic and Arctic
- India presently has two research stations at Antarctica namely
- At both stations, research and investigations are undertaken to understand the Polar processes and phenomenon.
- Indian Arctic station ‘Himadri’ is located at Ny Alesund, Spitsbergen Island, Norway and has served as a hub of Indian scientific investigations since 2008.
- India does not have ice-breakers for exploration and research in the above places.
Also read: India, France to patrol the Indian Ocean