Impact of ship emissions on marine boundary layer NOx and SO2 distributions over the Pacific basin

被引:60
作者
Davis, DD [1 ]
Grodzinsky, G
Kasibhatla, P
Crawford, J
Chen, G
Liu, S
Bandy, A
Thornton, D
Guan, H
Sandholm, S
机构
[1] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
[2] Duke Univ, Nicholas Sch Environm, Durham, NC USA
[3] NASA, Langley Res Ctr, Div Atmospher Sci, Hampton, VA 23665 USA
[4] Drexel Univ, Dept Chem, Philadelphia, PA 19104 USA
关键词
D O I
10.1029/2000GL012013
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The impact of ship emissions on marine boundary layer (MBL) NOx 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 NOx and SO2. For latitudes >15 degreesN, which define that part of the Pacific having the heaviest shipping, this analysis revealed significant model over prediction for NOx and a modest under prediction for SO2 when ship emissions were considered. Possible reasons for the difference in NOx and SO2 were explored using a full-chemistry box model. These results revealed that for an actual plume setting the NO2 lifetime could be greatly shortened by chemical processes promoted by ship plume emissions themselves. Similar chemical behavior was not found for SO2.
引用
收藏
页码:235 / 238
页数:4
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