Respond Projects

Ocean Sciences

Development of methodologies (statistical and numerical methods) for the generation of time series/ long period data base from the OCM sensors ( Chl, PAR and AOT ) over the Northern Indian Ocean in association with NRSC

ISRO had launched OCM-1 & OCM-2 and going to launch OCM-3 in near future for studying ocean color properties of Northern Indian Ocean such as Chlorophyll. To effectively use this data to study ocean color and climate change It is required to make long time series data combining OCM-1 and OCM-2 data and in future OCM-3. To effectively do this we need to reprocess data from these two sensors to bring them on a common platform to make them inter comparable and compatible. Work already initiated in this direction by developing methodologies for effectively inter comparing data from these satellites with that of SeaWiFS & MODIS (Two of NASA’s Ocean color sensors with stable data and accuracy).

Development of methodologies for generation of near real time ocean surface currents using satellite derived winds, Sea Surface heights/ anomaly, SST and salinity for the Indian ocean

  1. At present there is no satellite technology which can provide ocean surface currents in real time.
  2. Satellite Altimeters only provide the information regarding the geostrophic currents.
  3. Ekman component of the currents can be derived from scatterometer measurements.
  4. Development of improved methodologies is needed to synergistically use different satellite derived parameters such as SST, Salinity, Sealevel and Winds to generate ocean surface currents in realtime such as OSCAR, GlobCurrent products.

Development of bio-optical algorithms in CASE-II waters using Inherent optical parameters and propagation to the top of atmosphere using appropriate radiative transfer models

ISRO had launched OCM-1 & OCM-2 to study chlorophyll and bio optical properties of North Indian Ocean, and going to launch OCM-3 soon. It is very important to have accurate algorithm to retrieve Geophysical products to effective utilization of satellites. Retrieving Ocean color properties from Case II waters (coastal waters) is very complex as these waters are highly influenced by coastal discharges and human influence etc... We are measuring Inherent & Apparent optical properties of coastal water column around India and developing these algorithms using the field data and radiative transfer modelling.