@article{
 title = {Comparisons of trace constituents from ground stations and the DC-8 aircraft during PEM-West B},
 type = {article},
 year = {1997},
 keywords = {Aerosol,Aerosols,Asia,Atmosphere,Atmospheric composition,Biogenic emission,Cheju,Chemical composition,Dust,Hong Kong,Midway,Non-sea-salt sulfate,North Pacific,O/sub 3/,Oahu,Okinawa,Ozone,PEM-West B,Pacific island,Shemya,Stratosphere,Taiwan,Trace constituent,Troposphere,ad 1994,co},
 pages = {28539-28550},
 volume = {102},
 id = {32b00ca3-97d1-3add-be0d-99dd324bce1c},
 created = {2015-02-12T00:34:11.000Z},
 file_attached = {false},
 profile_id = {81af7548-db00-3f00-bfa0-1774347c59e1},
 group_id = {63e349d6-2c70-3938-9e67-2f6483f6cbab},
 last_modified = {2015-02-12T20:24:31.000Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 source_type = {Journal Article},
 notes = {<m:note>Article<m:linebreak/>American Geophys. Union</m:note>},
 abstract = {Chemical data from ground stations in Asia and the North Pacific are compared with data from the DC-8 aircraft collected during the Pacific Exploratory Measurements in the Western Pacific Ocean (PEM-West B) mission. Ground station sampling took place on Hong Kong, Taiwan, Okinawa, and Cheju; and at three Pacific islands, Shemya, Midway, and Oahu. Aircraft samples were collected during 19 flights, most over the western North Pacific. Aluminum was used as an indicator of mineral aerosol, and even though the aircraft did sample Asian dust, strong dust storms were not encountered. The frequency distribution for non-sea-salt sulfate (nss SO/sub 4//sup =/) in the aircraft samples was bimodal: the higher concentration mode (~ mu g m/sup -3/) evidently originated from pollution or, less likely, from volcanic sources, while the lower mode, with a peak at 0.040 mu g m/sup -3/, probably was a product of biogenic emissions. In addition, the concentrations of aerosol sulfate varied strongly in the vertical: arithmetic mean SO/sub 4//sup =/ concentrations above 5000 m were substantially lower than those below, suggesting the predominance of the surface sources. Several samples collected in the stratosphere exhibited elevated SO/sub 4//sup =/, however, probably as a result of emissions from Mount Pinatubo. During some boundary layer legs on the DC-8, the concentrations of CO and O/sub 3/ were comparable to those of clean marine air, but during other legs, several chemically distinct air masses were sampled, including polluted air in which O/sub 3/ was photochemically produced. In general, the continental outflow sampled from the aircraft was substantially diluted with respect to what was observed at the ground stations. Higher concentrations of aerosol species, O/sub 3/, and CO at the Hong Kong ground station relative to the aircraft suggest that much of the continental outflow from southeastern Asia occurs in the lower troposphere, and extensive long-range transport out of this part of Asia is not expected.},
 bibtype = {article},
 author = {Arimoto, R and Duce, R A and Prospero, J M and Savoie, D L and Talbot, R W and Dibb, J E and Heikes, B G and Ray, B J and Lewis, N F and Tomza, U},
 journal = {Journal of Geophysical Research},
 number = {D23}
}

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Union</m:note>","abstract":"Chemical data from ground stations in Asia and the North Pacific are compared with data from the DC-8 aircraft collected during the Pacific Exploratory Measurements in the Western Pacific Ocean (PEM-West B) mission. Ground station sampling took place on Hong Kong, Taiwan, Okinawa, and Cheju; and at three Pacific islands, Shemya, Midway, and Oahu. Aircraft samples were collected during 19 flights, most over the western North Pacific. Aluminum was used as an indicator of mineral aerosol, and even though the aircraft did sample Asian dust, strong dust storms were not encountered. The frequency distribution for non-sea-salt sulfate (nss SO/sub 4//sup =/) in the aircraft samples was bimodal: the higher concentration mode (~ mu g m/sup -3/) evidently originated from pollution or, less likely, from volcanic sources, while the lower mode, with a peak at 0.040 mu g m/sup -3/, probably was a product of biogenic emissions. In addition, the concentrations of aerosol sulfate varied strongly in the vertical: arithmetic mean SO/sub 4//sup =/ concentrations above 5000 m were substantially lower than those below, suggesting the predominance of the surface sources. Several samples collected in the stratosphere exhibited elevated SO/sub 4//sup =/, however, probably as a result of emissions from Mount Pinatubo. During some boundary layer legs on the DC-8, the concentrations of CO and O/sub 3/ were comparable to those of clean marine air, but during other legs, several chemically distinct air masses were sampled, including polluted air in which O/sub 3/ was photochemically produced. In general, the continental outflow sampled from the aircraft was substantially diluted with respect to what was observed at the ground stations. Higher concentrations of aerosol species, O/sub 3/, and CO at the Hong Kong ground station relative to the aircraft suggest that much of the continental outflow from southeastern Asia occurs in the lower troposphere, and extensive long-range transport out of this part of Asia is not expected.","bibtype":"article","author":"Arimoto, R and Duce, R A and Prospero, J M and Savoie, D L and Talbot, R W and Dibb, J E and Heikes, B G and Ray, B J and Lewis, N F and Tomza, U","journal":"Journal of Geophysical Research","number":"D23","bibtex":"@article{\n title = {Comparisons of trace constituents from ground stations and the DC-8 aircraft during PEM-West B},\n type = {article},\n year = {1997},\n keywords = {Aerosol,Aerosols,Asia,Atmosphere,Atmospheric composition,Biogenic emission,Cheju,Chemical composition,Dust,Hong Kong,Midway,Non-sea-salt sulfate,North Pacific,O/sub 3/,Oahu,Okinawa,Ozone,PEM-West B,Pacific island,Shemya,Stratosphere,Taiwan,Trace constituent,Troposphere,ad 1994,co},\n pages = {28539-28550},\n volume = {102},\n id = {32b00ca3-97d1-3add-be0d-99dd324bce1c},\n created = {2015-02-12T00:34:11.000Z},\n file_attached = {false},\n profile_id = {81af7548-db00-3f00-bfa0-1774347c59e1},\n group_id = {63e349d6-2c70-3938-9e67-2f6483f6cbab},\n last_modified = {2015-02-12T20:24:31.000Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n source_type = {Journal Article},\n notes = {<m:note>Article<m:linebreak/>American Geophys. Union</m:note>},\n abstract = {Chemical data from ground stations in Asia and the North Pacific are compared with data from the DC-8 aircraft collected during the Pacific Exploratory Measurements in the Western Pacific Ocean (PEM-West B) mission. Ground station sampling took place on Hong Kong, Taiwan, Okinawa, and Cheju; and at three Pacific islands, Shemya, Midway, and Oahu. Aircraft samples were collected during 19 flights, most over the western North Pacific. Aluminum was used as an indicator of mineral aerosol, and even though the aircraft did sample Asian dust, strong dust storms were not encountered. The frequency distribution for non-sea-salt sulfate (nss SO/sub 4//sup =/) in the aircraft samples was bimodal: the higher concentration mode (~ mu g m/sup -3/) evidently originated from pollution or, less likely, from volcanic sources, while the lower mode, with a peak at 0.040 mu g m/sup -3/, probably was a product of biogenic emissions. In addition, the concentrations of aerosol sulfate varied strongly in the vertical: arithmetic mean SO/sub 4//sup =/ concentrations above 5000 m were substantially lower than those below, suggesting the predominance of the surface sources. Several samples collected in the stratosphere exhibited elevated SO/sub 4//sup =/, however, probably as a result of emissions from Mount Pinatubo. During some boundary layer legs on the DC-8, the concentrations of CO and O/sub 3/ were comparable to those of clean marine air, but during other legs, several chemically distinct air masses were sampled, including polluted air in which O/sub 3/ was photochemically produced. In general, the continental outflow sampled from the aircraft was substantially diluted with respect to what was observed at the ground stations. 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