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GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L08811, doi:10.1029/2008GL033477, 2008

Impacts of future climate change and emissions reductions on nitrogen and sulfur deposition over the United States

Efthimios Tagaris

School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA


Kuo-Jen Liao

School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA


Kasemsan Manomaiphiboon

School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA


Jung-Hun Woo

NESCAUM, Boston, Massachusetts, USA


Shan He

NESCAUM, Boston, Massachusetts, USA


Praveen Amar

NESCAUM, Boston, Massachusetts, USA


Armistead G. Russell

School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA


Abstract

Potential impacts of global climate change and emissions on the total nitrogen and sulfur deposition over the US are investigated. Three future years' annual average deposition rates (i.e., 2049–2051) are compared with historic ones (i.e., 2000–2002) accounting for existing US and individual State's emission regulations and strategies. Impacts of global climate change alone on regional nitrogen and sulfur deposition are small compared to impacts from emission control-related reductions for the projections used in this study. The combined effect of climate change and emission reductions is a decrease in the annual average nitrogen and sulfur deposition over the US. Reduced nitrogen species dominate oxidized nitrogen deposition in the future. Spatial distribution plots for both components show lower deposition rates in the future mainly in the middle and eastern States where reductions in NOx and SO2 emissions are more pronounced.

Received 1 February 2008; accepted 12 March 2008; published 26 April 2008.

Keywords: deposition; climate change; moels-3.

Index Terms: 1637 Global Change: Regional climate change; 1630 Global Change: Impacts of global change (1225); 0345 Atmospheric Composition and Structure: Pollution: urban and regional (0305, 0478, 4251).

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Citation: Tagaris, E., K.-J. Liao, K. Manomaiphiboon, J.-H. Woo, S. He, P. Amar, and A. G. Russell (2008), Impacts of future climate change and emissions reductions on nitrogen and sulfur deposition over the United States, Geophys. Res. Lett., 35, L08811, doi:10.1029/2008GL033477.