Physics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3719805o&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 19, CiteID L19805
Physics
Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions (0426, 1610), Global Change: Atmosphere (0315, 0325)
Scientific paper
We present new results from the Mace Head coastal station illustrating that open ocean new particle production and growth events occur frequently during periods of high oceanic productivity over the N.E. Atlantic. For the first time, we report events during which a recently-formed nucleation mode (˜15 nm diameter) is detected and is observed to grow into an Aitken mode (˜50 nm diameter) over periods up to 48 hours. A growth rate of 0.8 nm hour-1 is estimated in a typical case study, pointing to a source region ˜700 km off-shore. The duration of the growth also suggests the particle production events are occurring over large spatial scales. Analysis of seven years of data show occurrence of extended growth events (lasting at least 24 hours) from March to September, with a peak occurrence in May. The events suggest that secondary marine boundary layer aerosol formation contributes to the marine aerosol population.
Dall'Osto Manuel
Monahan Ciaran
O'Dowd Colin
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