Respond Projects

Ocean Sciences

Study of relationships between oxygen and C13 based primary productivity for Indian coastal waters to evaluate photosynthesis quotient for developing satellite based primary productivity model

Changes in oxygen concentrations over time can be used to estimate the rates of photosynthesis and therefore primary productivity. Carbon assimilation rates based on oxygen evolution often assumes a ratio of one moles of O2 produced for every moles of CO2 assimilation however this number is highly variable in the environment. Studies can be undertaken to compare this classical techniques with modern C13 based primary productivity to understand the variability which can be used to develop satellite based PP model.

Measurement of particulate organic and particulate inorganic carbon in coastal and open ocean waters of northern Indian Ocean for development of satellite based algorithm

Particulate organic and inorganic (comprised of mainly cocolithophores) are important component of any oceanic system which influence the marine carbon cycle. Remote sensing measurements are now being used to characterise these component in basin scale due to its large spatial coverage however lack proper validation due less in-situ measurement. Both beam attenuation and in situ POC/PIC have been used to develop empirical relationship as early as 1988. Latest research suggests good relationship between oceanic POC concentrations vs. Rrs (443)/ Rrs (555). Opportunities are available for measuring POC/PIC by chemical or physical method (CTD, Beam Attenuation) for development and validation of satellite algorithm for Northern Indian Ocean