Papers Published

1. Davis, D.D. and Grodzinsky, G. and Kasibhatla, P. and Crawford, J. and Chen, G. and Liu, S. and Bandy, A. and Thornton, D. and Guan, H. and Sandholm, S., Impact of ship emissions on marine boundary layer NO_x and SO₂ distributions over the Pacific Basin, Geophysical Research Letters, vol. 28 no. 2 (2001), pp. 235 - 238 [2000GL012013] .
   (last updated on 2007/04/09)

   Abstract:
   The impact of ship emissions on marine boundary layer (MBL) NO_x and SO₂ levels over the Pacific Ocean has been explored by comparing predictions (with and without ships) from a global chemical transport model (GCTM) against compiled airborne observations of MBL NO_x and SO₂. For latitudes gt;15°N, which define that part of the Pacific having the heaviest shipping, this analysis revealed significant model over prediction for NO_x and a modest under prediction for SO₂ when ship emissions were considered. Possible reasons for the difference in NO_x and SO₂ were explored using a full-chemistry box model. These results revealed that for an actual plume setting the NO_x lifetime could be greatly shortened by chemical processes promoted by ship plume emissions themselves. Similar chemical behavior was not found for SO₂.

   Keywords:
   Boundary layers;Nitrogen oxides;Sulfur dioxide;Mathematical models;Calculations;Oxygen;Carbon monoxide;Temperature;Pressure;