Meridional transport and deposition of atmospheric <sup>10</sup>Be
<sup>10</sup>Be concentrations measured in ice cores exhibit larger temporal variability than expected based on theoretical production calculations. To investigate whether this is due to atmospheric transport a general circulation model study is performed with the <sup>10</sup&g...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2009-01-01
|
| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/9/515/2009/acp-9-515-2009.pdf |
| _version_ | 1819036316360245248 |
|---|---|
| author | J. Feichter J. Beer U. Heikkilä |
| author_facet | J. Feichter J. Beer U. Heikkilä |
| author_sort | J. Feichter |
| collection | DOAJ |
| description | <sup>10</sup>Be concentrations measured in ice cores exhibit larger temporal variability than expected based on theoretical production calculations. To investigate whether this is due to atmospheric transport a general circulation model study is performed with the <sup>10</sup>Be production divided into stratospheric, tropospheric tropical, tropospheric subtropical and tropospheric polar sources. A control run with present day <sup>10</sup>Be production rate is compared with a run during a geomagnetic minimum. The present <sup>10</sup>Be production rate is 4–5 times higher at high latitudes than in the tropics whereas during a period of no geomagnetic dipole field it is constant at all latitudes. The <sup>10</sup>Be deposition fluxes, however, show a very similar latitudinal distribution in both the present day and the geomagnetic minimum run indicating that <sup>10</sup>Be is well mixed in the atmosphere before its deposition. This is also confirmed by the fact that the contribution of <sup>10</sup>Be produced in the stratosphere is dominant (55%–70%) and relatively constant at all latitudes. The contribution of stratospheric <sup>10</sup>Be is approximately 70% in Greenland and 60% in Antarctica reflecting the weaker stratosphere-troposphere air exchange in the Southern Hemisphere. |
| first_indexed | 2024-12-21T08:03:35Z |
| format | Article |
| id | doaj.art-69c288f6544c4ff99b93ef669638d63f |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-21T08:03:35Z |
| publishDate | 2009-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-69c288f6544c4ff99b93ef669638d63f2022-12-21T19:10:51ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242009-01-0192515527Meridional transport and deposition of atmospheric <sup>10</sup>BeJ. FeichterJ. BeerU. Heikkilä<sup>10</sup>Be concentrations measured in ice cores exhibit larger temporal variability than expected based on theoretical production calculations. To investigate whether this is due to atmospheric transport a general circulation model study is performed with the <sup>10</sup>Be production divided into stratospheric, tropospheric tropical, tropospheric subtropical and tropospheric polar sources. A control run with present day <sup>10</sup>Be production rate is compared with a run during a geomagnetic minimum. The present <sup>10</sup>Be production rate is 4–5 times higher at high latitudes than in the tropics whereas during a period of no geomagnetic dipole field it is constant at all latitudes. The <sup>10</sup>Be deposition fluxes, however, show a very similar latitudinal distribution in both the present day and the geomagnetic minimum run indicating that <sup>10</sup>Be is well mixed in the atmosphere before its deposition. This is also confirmed by the fact that the contribution of <sup>10</sup>Be produced in the stratosphere is dominant (55%–70%) and relatively constant at all latitudes. The contribution of stratospheric <sup>10</sup>Be is approximately 70% in Greenland and 60% in Antarctica reflecting the weaker stratosphere-troposphere air exchange in the Southern Hemisphere.http://www.atmos-chem-phys.net/9/515/2009/acp-9-515-2009.pdf |
| spellingShingle | J. Feichter J. Beer U. Heikkilä Meridional transport and deposition of atmospheric <sup>10</sup>Be Atmospheric Chemistry and Physics |
| title | Meridional transport and deposition of atmospheric <sup>10</sup>Be |
| title_full | Meridional transport and deposition of atmospheric <sup>10</sup>Be |
| title_fullStr | Meridional transport and deposition of atmospheric <sup>10</sup>Be |
| title_full_unstemmed | Meridional transport and deposition of atmospheric <sup>10</sup>Be |
| title_short | Meridional transport and deposition of atmospheric <sup>10</sup>Be |
| title_sort | meridional transport and deposition of atmospheric sup 10 sup be |
| url | http://www.atmos-chem-phys.net/9/515/2009/acp-9-515-2009.pdf |
| work_keys_str_mv | AT jfeichter meridionaltransportanddepositionofatmosphericsup10supbe AT jbeer meridionaltransportanddepositionofatmosphericsup10supbe AT uheikkila meridionaltransportanddepositionofatmosphericsup10supbe |