6 [1] Understanding the effects of global climate change on regional air quality is central in 7 future air quality planning. We report here on the use of the Goddard Institute for Space 8 Studies (GISS) general circulation model (GCM) III to drive the GEOS-CHEM global 9 atmospheric chemical transport model to simulate climatological present-day aerosol 10 levels over the United States. Evaluat...

[1] Understanding the effects of global climate change on regional air quality is central in future air quality planning. We report here on the use of the Goddard Institute for Space Studies (GISS) general circulation model (GCM) III to drive the GEOS-CHEM global atmospheric chemical transport model to simulate climatological present-day aerosol levels over the United States. Evaluation of mode...

Abstract. There is now substantial literature on climate model studies of equatorial or tropical stratospheric SO2 injections that aim to counteract the surface warming produced by rising concentrations greenhouse gases. Here we present results from first systematic intercomparison responses in three Earth system models wherein injection occurs at different latitudes lower stratosphere: CESM2-W...

Recycling sewage sludge into fertilizer for agricultural purposes may improve soil fertility by influencing the physical, chemical, and biological properties of the land. However, there is concern regarding elevated levels of heavy metals and pathogenic microorganisms, which may result from the use of untreated sewage sludge. Gamma radiation is found to be an efficient tool in the hygienization...

We examine the relative importance of chemical precursor emissions affecting ozone (O3) and hydroxyl (OH) for the year 2100. Runs were developed from the Comparison of Tropospheric Oxidants (Ox Comp) modeling workshop year 2100 A2p emissions scenario, part of the Intergovernmental Panel on Climate Change (IPCC) third assessment report (TAR). While TAR examined only cumulative change, we examine...