Research

I use the high perfromance implementation of GEOS-Chem (GCHP), with its stretched grid facility to conduct multi-scale simulations across different spatial resolutions and temporal variations. My simulations are majorly used for : A) isolation of sources of air pollution, B) understanding composition of fine particulate matter C) intepreting remote sensing observations D) studying resolution effects of fine scale gaseous precursor estimates C) developing top-down emission estimates.

I use TROPOMI based NO₂ and SO₂ column observations (level 2 products) to constrain NOx and SO₂ emissions from global to local scales. Air Mass Factors are obtained from GCHP.

I interpret the hourly varaition of NO₂ columns using observations from Pandonia Global Network (PGN) using GCHP.

Mortality per 100,000 people associated to outdoor air pollution due to PM_2.5 and ozone in 2019

I use the Global Burden of Diseases (GBD) baseline mortality and relative risk datsets to estimate the premature mortality of multiple disease end-points attributable to fine particulate matter (PM_2.5) from source and fuel based sectors. I also study the long-term trends (temporal) and the evolution of mortality associated to PM_2.5 from global to local scales.

I use the DISCOVER-AQ and KORUS-AQ insitu flight measurements of trace grace mixing ratios (concentrations) to evaluate the vertical profile of NO₂ and SO₂.