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Atmospheric transport of chlorinated hydrocarbons to Sweden 1985 compared to 1973

Larsson, Per LU and Okla, Lennart LU (1989) In Atmospheric Environment 23(8). p.1699-1711
Abstract
The atmospheric fallout of DDT and DDE (ΣDDT) over Sweden has decreased during the last decade. Today long-range transport from southern sources outside the country dominates the inflow. This was reflected in a decreasing south-to-north gradient of the compounds in atmospheric deposition and in the lower atomosphere. The fallout of PCBs was similar in 1984–1985 and 1972–1973, and today local contamination by combustion is more prominent than it was 10 years ago, even though PCB restrictions have been in force during the interim. Since PCB deposition is higher in the coastal areas than in the inland regions, other sources, such as volatilization from the seas and long-range transport also contribute to PCBs in fallout.



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The atmospheric fallout of DDT and DDE (ΣDDT) over Sweden has decreased during the last decade. Today long-range transport from southern sources outside the country dominates the inflow. This was reflected in a decreasing south-to-north gradient of the compounds in atmospheric deposition and in the lower atomosphere. The fallout of PCBs was similar in 1984–1985 and 1972–1973, and today local contamination by combustion is more prominent than it was 10 years ago, even though PCB restrictions have been in force during the interim. Since PCB deposition is higher in the coastal areas than in the inland regions, other sources, such as volatilization from the seas and long-range transport also contribute to PCBs in fallout.



The levels of PCB and ΣDDT in the lower atmosphere were positively correlated with temperature. Consequently, the compounds tended to be in the gas phase during the warmer summer period whereas during winter they were more liable to be adsorbed to particles, partition to airborne water and contribute in fallout.



From each sampling station a chromatographic ‘fingerprint’ of pollutants in airborne fallout and in the lower atmosphere was obtained. The fingerprint was the combined result of the station's location and climate.



The results show that considerable amounts of chlorinated pollutants are being transported to and within Sweden via the atmosphere (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Atmospheric Environment
volume
23
issue
8
pages
1699 - 1711
publisher
Elsevier
external identifiers
  • scopus:0024472376
ISSN
1352-2310
DOI
10.1016/0004-6981(89)90055-3
language
English
LU publication?
yes
id
ddbf8257-c4d0-496a-803e-b70e3b945c19 (old id 8164189)
date added to LUP
2015-11-04 14:41:34
date last changed
2017-07-30 04:30:56
@article{ddbf8257-c4d0-496a-803e-b70e3b945c19,
  abstract     = {The atmospheric fallout of DDT and DDE (ΣDDT) over Sweden has decreased during the last decade. Today long-range transport from southern sources outside the country dominates the inflow. This was reflected in a decreasing south-to-north gradient of the compounds in atmospheric deposition and in the lower atomosphere. The fallout of PCBs was similar in 1984–1985 and 1972–1973, and today local contamination by combustion is more prominent than it was 10 years ago, even though PCB restrictions have been in force during the interim. Since PCB deposition is higher in the coastal areas than in the inland regions, other sources, such as volatilization from the seas and long-range transport also contribute to PCBs in fallout.<br/><br>
<br/><br>
The levels of PCB and ΣDDT in the lower atmosphere were positively correlated with temperature. Consequently, the compounds tended to be in the gas phase during the warmer summer period whereas during winter they were more liable to be adsorbed to particles, partition to airborne water and contribute in fallout.<br/><br>
<br/><br>
From each sampling station a chromatographic ‘fingerprint’ of pollutants in airborne fallout and in the lower atmosphere was obtained. The fingerprint was the combined result of the station's location and climate.<br/><br>
<br/><br>
The results show that considerable amounts of chlorinated pollutants are being transported to and within Sweden via the atmosphere},
  author       = {Larsson, Per and Okla, Lennart},
  issn         = {1352-2310},
  language     = {eng},
  number       = {8},
  pages        = {1699--1711},
  publisher    = {Elsevier},
  series       = {Atmospheric Environment},
  title        = {Atmospheric transport of chlorinated hydrocarbons to Sweden 1985 compared to 1973},
  url          = {http://dx.doi.org/10.1016/0004-6981(89)90055-3},
  volume       = {23},
  year         = {1989},
}