Chemical-constituents in the air and snow at dye-3, greenland .2. Analysis of episodes in april 1989. Davidson, C., I.; Jaffrezo, J., L.; Mosher, B., W.; Dibb, J., E.; Borys, R., D.; Bodhaine, B., A.; Rasmussen, R., A.; Boutron, C., F.; Ducroz, F., M.; Cachier, M.; Ducret, J.; Colin, J., L.; Heidam, N., Z.; Kemp, K.; and Hillamo, R. Atmos Environ Pt A-Gen Top, 27:2723-2737, 1993.
abstract   bibtex   
Detailed examination of a two-week period in April 1989 during the Dye 3 Gas and Aerosol Sampling Program shows that episodes of relatively high concentration of certain chemical constituents occur at this time of year. Airborne concentrations of crustal metals such as Al and Ca can exceed 100 ng m(-3), while concentrations of SO42can exceed 1000 ng m(-3). Elevated concentrations of MSA, Be-7 and Pb-210 are also noted. Consideration of synoptic maps and backward air mass trajectories suggests that the episodes are due to transport from a variety of source regions, including Eurasia (transport over the Pole), North America and western Europe. In addition to elevated airborne concentrations, levels of these constituents in surface snow are high during April. However, it is difficult to develop quantitative relationships between concentrations in air and in snow due to the difficulty in measuring airborne concentrations at cloud-level; variations in scavenging by clouds may also be significant. It is concluded that the springtime maxima in airborne concentrations resulting from long-range transport from a variety of source regions are responsible for strong identifiable signals in ice cores and snowpits from this region. C1 CNRS,GLACIOL & GEOPHYS ENVIRONNEMENT LAB,F-38402 ST MARTIN DHERES,FRANCE. UNIV NEW HAMPSHIRE,INST STUDY EARTH OCEANS & SPACE,DURHAM,NH 03824. DESERT RES INST,CTR ATMOSPHER SCI,RENO,NV 89506. NOAA,CMDA,BOULDER,CO 80303. OREGON GRAD INST SCI & TECHNOL,BEAVERTON,OR 97006. CEA,CNRS,CTR FAIBLES RADIOACT,F-91198 GIF SUR YVETTE,FRANCE. UNIV PARIS 07,PHYSICOCHIM ATMOSPHERE LAB,F-75251 PARIS,FRANCE. NATL INST ENVIRONM RES,DK-4000 ROSKILDE,DENMARK. FINNISH METEOROL INST,SF-00810 HELSINKI,FINLAND.
@article{
 title = {Chemical-constituents in the air and snow at dye-3, greenland .2. Analysis of episodes in april 1989},
 type = {article},
 year = {1993},
 pages = {2723-2737},
 volume = {27},
 id = {ef4b49ce-a041-3663-b691-d5ab8d85b060},
 created = {2014-10-08T16:28:18.000Z},
 file_attached = {false},
 profile_id = {363623ef-1990-38f1-b354-f5cdaa6548b2},
 group_id = {02267cec-5558-3876-9cfc-78d056bad5b9},
 last_modified = {2014-10-08T16:50:52.000Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {Davidson:AEPAGT:1993c},
 source_type = {article},
 abstract = {Detailed examination of a two-week period in April
1989 during the Dye 3 Gas and Aerosol Sampling Program shows that
episodes of relatively high concentration of certain chemical
constituents occur at this time of year. Airborne concentrations of
crustal metals such as Al and Ca can exceed 100 ng m(-3), while
concentrations of SO42can exceed 1000 ng m(-3). Elevated
concentrations of MSA, Be-7 and Pb-210 are also noted.
Consideration of synoptic maps and backward air mass trajectories
suggests that the episodes are due to transport from a variety of
source regions, including Eurasia (transport over the Pole), North
America and western Europe. In addition to elevated airborne
concentrations, levels of these constituents in surface snow are
high during April. However, it is difficult to develop quantitative
relationships between concentrations in air and in snow due to the
difficulty in measuring airborne concentrations at cloud-level;
variations in scavenging by clouds may also be significant. It is
concluded that the springtime maxima in airborne concentrations
resulting from long-range transport from a variety of source
regions are responsible for strong identifiable signals in ice
cores and snowpits from this region.
C1 CNRS,GLACIOL & GEOPHYS ENVIRONNEMENT LAB,F-38402 ST MARTIN
DHERES,FRANCE. UNIV NEW HAMPSHIRE,INST STUDY EARTH OCEANS &
SPACE,DURHAM,NH 03824. DESERT RES INST,CTR ATMOSPHER SCI,RENO,NV
89506.
NOAA,CMDA,BOULDER,CO 80303.
OREGON GRAD INST SCI & TECHNOL,BEAVERTON,OR 97006.
CEA,CNRS,CTR FAIBLES RADIOACT,F-91198 GIF SUR YVETTE,FRANCE. UNIV
PARIS 07,PHYSICOCHIM ATMOSPHERE LAB,F-75251 PARIS,FRANCE. NATL INST
ENVIRONM RES,DK-4000 ROSKILDE,DENMARK.
FINNISH METEOROL INST,SF-00810 HELSINKI,FINLAND.
},
 bibtype = {article},
 author = {Davidson, C I and Jaffrezo, J L and Mosher, B W and Dibb, J E and Borys, R D and Bodhaine, B A and Rasmussen, R A and Boutron, C F and Ducroz, F M and Cachier, M and Ducret, J and Colin, J L and Heidam, N Z and Kemp, K and Hillamo, R},
 journal = {Atmos Environ Pt A-Gen Top}
}
Downloads: 0