Earth, Atmosphere & Environment Sciences
Title : | Quantification of Nitrous Oxide Fluxes Over India by Top-Down Inverse Modeling |
Area of research : | Earth, Atmosphere & Environment Sciences |
Principal Investigator : | Dr. Sajeev Philip, Indian Institute Of Technology (IIT) Delhi |
Timeline Start Year : | 2022 |
Timeline End Year : | 2024 |
Contact info : | philip.sajeev@gmail.com |
Equipments : | Dell computer |
Details
Executive Summary : | Nitrous oxide (N2O) is the third most potent anthropogenic greenhouse gas (GHG) in the atmosphere, with atmospheric N2O mixing ratios increasing over 20% from pre-industrial times to the present day. This increase is primarily due to anthropogenic N2O emissions from agriculture, with India experiencing a significant increase in N2O emissions over the past decade. The global N2O flux budget is well-quantified, but regional flux estimates have large uncertainties over tropical and subtropical regions, including India. Estimating N2O surface fluxes using process-based ecosystem models and flux inverse models has large uncertainties. The proposed project aims to accurately quantify N2O fluxes over India by assimilating global and regional in situ observations. The project's objectives include estimating monthly gridded surface N2O fluxes over India for a decade (2012-2021), rigorously validating inverse model estimates of N2O fluxes by simulating atmospheric N2O concentrations using a high-spatial-resolution forward model, and investigating the spatiotemporal variability of atmospheric N2O concentrations and surface fluxes over India. This project will lead to a better quantification of Indian N2O surface fluxes, helping report accurate national GHG budgets to international agencies like the United Nations Framework Convention on Climate Change. It will also improve our understanding of the global nitrogen cycle and be the first study focusing on inverse model estimation and assessment of Indian N2O fluxes. |
Total Budget (INR): | 16,46,495 |
Organizations involved