Peer-Reviewed Journal Details
Mandatory Fields
O'Dowd, CD,Geever, M,Hill, MK
1998
May
Geophysical Research Letters
New particle formation: Nucleation rates and spatial scales in the clean marine coastal environment
Published
()
Optional Fields
BOUNDARY-LAYER
25
1661
1664
Nucleation of new, ultra-fine, aerosol particles has been observed in the clean marine coastal atmosphere under a variety of conditions. These nucleation events were observed to occur frequently over spatial scales of 10's-100's of metres and temporal scales of seconds to minutes. Two conditions appeared to be necessary for nucleation event to occur: low tide and solar irradiation. The requirement of low tide conditions suggests that the exposed shore area provides the source of new particle precursors. It is speculated that VOC and/or alkyl halide derivatives contribute to nucleation under these conditions. Nucleation rates were calculated to be approximate to 10(3) -10(4) cm(-3) s(-1), suggesting that the coastal zone is an important source of atmospheric nuclei.
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