Carbon Cycle and Ocean Modelling

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A detailed knowledge of the carbon cycle is an important component in the study of our changing climate. At C-MMACS we have endeavoured to investigate and integrate several components of the carbon cycle – oceanic, terrestrial and atmospheric along with a synthesis of modelling and measurements to elucidate the key processes in the climate system.

The capability to model the complete carbon cycle and its climatic feedback will enable us to make informed choices about climate change mitigation. At C-MMACS we have carried out a comprehensive study of this by integrating high precision data with sophisticated models of the oceanic circulation, carbon cycle, transport and inversion for robust flux estimation.

For the first time in India, carbon flux has been estimated by inverting the data from CO2 measurement stations at Hanle and Pondicherry which has reduced the posteriori uncertainties of these estimates significantly. The group focuses on in-house developed ocean biogeochemistry model which integrates physics, chemistry and biology of the marine system. The current topics of research are:

•     Carbon cycle modelling and measurements for climate change mitigation
•     Ocean biogeochemical modelling 

Solid Earth Modelling

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Global Positioning System (GPS) based Geodesy had become capable of yielding sub-cm precision in location by the early 1990s and the possibility of it being used to determine crustal strain rates in India was recognised at C-MMACS in 1993 following the Khillari earthquake. Research at C-MMACS has since yielded fairly well constrained figures for the velocity of the Indian plate and the partitioning of strain from Kanya-Kumari to Ladakh in the trans-Himalyas. Over the years C-MMACS has also taken up the arduous task of setting up GPS stations in remote locations in the country to generate the required data base, and to extend application of GPS technology to other areas.

Solid Earth Modelling group is focused on precise GPS based quantification and modelling of inter, co- and post-seismic surface deformation in Indian subcontinent. In addition to this, the group works on modeling and simulation of ground motion for deterministic seismic hazard, site specific ground motion from scenario earthquakes and crustal and mantle structure by lithosphere modeling. The current topics of research are:

•     Crustal Deformation
•     Estimation of Precipitable water vapour using GPS
•     Earthquake hazard assessment
•     Site effects and and microzonation
•     Lithosphere modelling

Multiscale Modeling and Simulation

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A fundamental barrier in advancing multiscale weather and climate prediction is the limited capability of contemporary models to represent the multiscale organization of precipitating convection. To overcome this, a multiscale modeling and simulation framework, which replaces the conventional cloud parameterizations with a cloud-resolving model (CRM) in each grid column of a GCM, constitutes a new and promising approach. This can provide for global coverage, two-way interactions between the CRMs and their parent GCM and explicit simulation of cloud processes and their interactions with aerosol, radiation and surface processes.

Multiscale Modeling and Simulation Group seeks to develop and apply this framework in various disciplines including weather and climate change. The current research areas in this field are:

• Global Cloud-Resolving Model Simulations
• High Performance Computing for Meteorological Applications
• Multi-time and spatial scale phenomena

High Performance Computing and Cyber security

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Category: Research Groups

Mathematical modelling and computer simulation in the fields of ocean, atmosphere, earth science and engineering involve computational tasks which can only be provided by High Performance Computing (HPC). The need for computational power, measured in terms of Giga Floating Point Operations per Seconds (FLOPS), grows exponentially with every bit of increase in the complexity of problem. C-MMACS today has one of the best computing facilities in the country. In addition the HPC group is also involved in research in the field of Cryptography and Network Security.

CSIR C-MMACS has made significant enhancement to both the supercomputing and communication infrastructure with the state of art supercomputing facility. The current topics of research are:

•     Cryptography and secure communication
•     Cryptanalysis
•     Cyber security and ethical hacking
•     Denial-of-Service attacks
•     Parallel algorithms