 |
| Titel |
Towards a quasi-complete reconstruction of past atmospheric aerosol load and composition (organic and inorganic) over Europe since 1920 inferred from Alpine ice cores |
| VerfasserIn |
S. Preunkert, M. Legrand |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1814-9324
|
| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 9, no. 4 ; Nr. 9, no. 4 (2013-07-03), S.1403-1416 |
| Datensatznummer |
250018082
|
| Publikation (Nr.) |
 copernicus.org/cp-9-1403-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| Seasonally resolved chemical ice core records available from the Col du
Dôme glacier (4250 m elevation, French Alps), are here used to
reconstruct past aerosol load and composition of the free European
troposphere from before World War II to present. Available ice core records
include inorganic (Na+, Ca2+, NH4+, Cl−,
NO3−, and SO42−) and organic (carboxylates, HCHO, humic-like substances, dissolved organic carbon, water-insoluble organic carbon,
and black carbon) compounds and fractions that permit reconstructing the key
aerosol components and their changes over the past. It is shown that the
atmospheric load of submicron aerosol has been increased by a factor of 3
from the 1921–1951 to 1971–1988 years, mainly as a result of a large
increase of sulfate (a factor of 5), ammonium and water-soluble organic
aerosol (a factor of 3). Thus, not only growing anthropogenic emissions of
sulfur dioxide and ammonia have caused the enhancement of the atmospheric
aerosol load but also biogenic emissions producing water-soluble organic
aerosol. This unexpected change of biospheric source of organic aerosol
after 1950 needs to be considered and further investigated in scenarios
dealing with climate forcing by atmospheric aerosol. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|