Sajeev Philip

TL;DR: In this article, a nested-grid GEOS-Chem model reproduces the distribution of PM2.5 and simulates up to 364 εg/m3 of daily maximum PM 2.5.

TL;DR: The authors used in situ observations from the Interagency Monitoring of Protected Visual Environments (IMPROVE) network, the Midwest Ammonia Monitoring Project, 11 surface site campaigns as well as Infrared Atmospheric Sounding Interferometer (IASI) satellite measurements with the GEOS-Chem model to investigate inorganic aerosol loading and atmospheric ammonia concentrations over the United States.

TL;DR: In this article, the authors assess the standard operational NO2 data product (OMNO2, version 2.1) retrieved from the Ozone Monitoring Instrument (OMI) onboard NASA's Aura satellite using a combination of aircraft and surface in-situ measurements as well as ground-based column measurements at several locations and a bottom-up NOx emission inventory over the continental US.

TL;DR: Evaluation of the satellite-model PM2.5 composition data set with North American in situ measurements indicated significant spatial agreement for secondary inorganic aerosol, particulate organic mass, black carbon, mineral dust, and sea salt, which offers information about global population exposure to the chemical components and sources of PM1.5.

TL;DR: PM2.5 pollution is a pan-India problem, with a regional character, and is not limited to urban areas or megacities, and even under the most active reductions envisioned, the 2050 mean exposure is estimated to be nearly 3 times higher than the WHO Air Quality Guideline.