My broad research interests includes
- Modelling the interactions between terrestrial ecosystem and climate.
- Carbon Nitrogen cycle interactions and its modelling
- Land use change and its impacts on climate and carbon cycle
- Solving Partial / Ordinary Differential Equations using Analytical/Numerical methods
Current Research
Currently I have been involved in investigating the impacts of historical and future land use land cover changes (LULCC) on the climate. Working particularly on the spatio-temporal differences between biogeophysical and biogeochemical aspects of LULCC. Also I am responsible for designing idealized protocol that allows one to quantify sensitivity of any climate model to LULCC at various time and spatial scales.
Past Research
As a project scientist at Indian Institute of Science (India), I worked on the relative importance of CO2-fertilization, climate warming, N deposition and land use/cover change on the terrestrial carbon cycle in the historical period using full coupled model CESM (Community Earth System Model). Using several large-scale deforestation experiments, I have investigated the biogeochemical and biogeophysical effects on climate. We contrast the implications of afforestation on ameliorating or enhancing anthropogenic contributions from previously converted (agricultural) land surfaces. Further, we conclude that biochemical (CO2 effect) effects trigger global climate change. Biophysical effects often cause strong local and regional climate change and biophysical effects also could have remote influence through atmospheric circulation changes including shifts in the Hadley cell.
PhD thesis
I worked for my PhD in Applied Mathematics with research topic "Mathematical modeling of dispersion of atmospheric aerosols”. This work includes the modeling of the atmospheric turbulent fluid and aerosols as a solid-fluid mixture and, investigated the effects of porous parameter, deformation of aerosols, chemical reaction and electric field on the dispersion. I have used Taylor dispersion model, Ari’s model and Gill & Sankarasubramanian dispersion models.
Earth systems models
Presently I am using the full coupled Earth system model IPSL-CM6 (http://icmc.ipsl.fr/index.php/icmc-models/icmc-ipsl-cm6)
Previously I have extensively used Community Earth System Model (http://www.cesm.ucar.edu/)
Computer Skills/ Tools using
- Good experience in running global Earth system models and data assimilation on high end computing systems (Presently using Super computer CURIE , CEA-TGCC France computing facility)
- Extensively used Super Computers: IBM Regatta, Tesla Cluster, Ecology Cluster (Stanford, USA) to run NCAR Community Earth System Model Simulations.
- Linux(OS), Shell script, Python, Climate Data Analysis Tool (Python based programming), Origin 8.0, MATHEMATICA 8.0, FORTRAN, C-Programming.
- Very good handson ability to run data processing applications [UVCDAT (http://uvcdat.llnl.gov/index.html) & NCL (https://www.ncl.ucar.edu/)].