DIVECHA CENTRE FOR CLIMATE CHANGE
IISc BANGALORE
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Climate Change Seminar Series
“Modelling the effects of Climate, Vegetation and Disturbance on Terrestrial Biogeochemical Cycles”
Speaker : Dr. Ajit Govind
Ecologie Fonctionnelle et Physique de la Environnement (EPHYSE)
L'Institut national de la recherche agronomique
France
Venue : Auditorium,
Date : 12 November 2013 , Tuesday
Time : 04: 00 pm .
Abstract
The terrestrial biogeochemical processes are perhaps the most dynamic and complex component of the Earths Climate system. To better understand these complexities, the integrated use of process-based modeling, remote sensing (RS) and measurements at multiple scales are proposed.
A process-based distributed ecohydrological model (BEPS-TerrainLab V2.0) that has tight coupling of water (W), energy (E), carbon (C) and nitrogen (N) cycles discussed. The potential errors in the simulated C fluxes under abstracted hydrology are explored. Improvements made towards the modeling of canopy radiative transfer mechanism, in addition to issues that are pertinent to agro-ecosystems (C4 photosynthesis, irrigation, fertilizer N etc.) are presented.
In the second part of the seminar, the long-term modeling of C in the soil and vegetation is discussed from the lessons learnt from the Historical C Modeling Project of Canada. Finally, large-scale trends in global vegetation using long-term RS data (AVHRR) are analyzed. Because of the importance of soil water in modulating the global vegetation, I hypothesize a limitation in the widely used global estimate of terrestrial photosynthesis (MODIS17A2). A modeling strategy that is being developed to improve the MODIS17A2 by incorporating soil moisture data is briefly explained. In this regard, I also present a preliminary analysis of soil moisture products from microwave RS (SMOSL3 and AMSRE-LPRM) with respect to a reanalysis product (ECMWF).
All are Welcome
Tea/Coffee: 03: 45pm
