Modeling Atmospheric Transport of Cosmogenic Radionuclide 10Be Using GEOS‐Chem 14.1.1 and ECHAM6.3‐HAM2.3: Implications for Solar and Geomagnetic Reconstructions
Abstract A prerequisite to applying 10Be in natural archives for solar and geomagnetic reconstructions is to know how 10Be deposition reflects atmospheric production changes. However, this relationship remains debated. To address this, we use two state‐of‐the‐art global models GEOS‐Chem and ECHAM6.3...
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2023GL106642 |
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| author | Minjie Zheng Florian Adolphi Sylvaine Ferrachat Florian Mekhaldi Zhengyao Lu Andreas Nilsson Ulrike Lohmann |
| author_facet | Minjie Zheng Florian Adolphi Sylvaine Ferrachat Florian Mekhaldi Zhengyao Lu Andreas Nilsson Ulrike Lohmann |
| author_sort | Minjie Zheng |
| collection | DOAJ |
| description | Abstract A prerequisite to applying 10Be in natural archives for solar and geomagnetic reconstructions is to know how 10Be deposition reflects atmospheric production changes. However, this relationship remains debated. To address this, we use two state‐of‐the‐art global models GEOS‐Chem and ECHAM6.3‐HAM2.3 with the latest beryllium production model. During solar modulation, both models suggest that 10Be deposition reacts proportionally to global production changes, with minor latitudinal deposition biases (<5%). During geomagnetic modulation, however, 10Be deposition changes are enhanced by ∼15% in the tropics and attenuated by 20%–35% in subtropical and polar regions compared to global production changes. Such changes are also hemispherically asymmetric, attributed to asymmetric production between hemispheres. For the solar proton event in 774/5 CE, 10Be shows a 15% higher deposition increase in polar regions than in tropics. This study highlights the importance of atmospheric mixing when comparing 10Be from different locations or to independent geomagnetic field records. |
| format | Article |
| id | doaj-art-aa99707ce6da4fcfa01f78d6e7cb2d6b |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
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| series | Geophysical Research Letters |
| spelling | doaj-art-aa99707ce6da4fcfa01f78d6e7cb2d6b2025-08-20T02:11:09ZengWileyGeophysical Research Letters0094-82761944-80072024-01-01512n/an/a10.1029/2023GL106642Modeling Atmospheric Transport of Cosmogenic Radionuclide 10Be Using GEOS‐Chem 14.1.1 and ECHAM6.3‐HAM2.3: Implications for Solar and Geomagnetic ReconstructionsMinjie Zheng0Florian Adolphi1Sylvaine Ferrachat2Florian Mekhaldi3Zhengyao Lu4Andreas Nilsson5Ulrike Lohmann6Institute for Atmospheric and Climate Science ETH Zürich Zürich SwitzerlandAlfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven GermanyInstitute for Atmospheric and Climate Science ETH Zürich Zürich SwitzerlandDepartment of Geology Lund University Lund SwedenDepartment of Physical Geography and Ecosystem Science Lund University Lund SwedenDepartment of Geology Lund University Lund SwedenInstitute for Atmospheric and Climate Science ETH Zürich Zürich SwitzerlandAbstract A prerequisite to applying 10Be in natural archives for solar and geomagnetic reconstructions is to know how 10Be deposition reflects atmospheric production changes. However, this relationship remains debated. To address this, we use two state‐of‐the‐art global models GEOS‐Chem and ECHAM6.3‐HAM2.3 with the latest beryllium production model. During solar modulation, both models suggest that 10Be deposition reacts proportionally to global production changes, with minor latitudinal deposition biases (<5%). During geomagnetic modulation, however, 10Be deposition changes are enhanced by ∼15% in the tropics and attenuated by 20%–35% in subtropical and polar regions compared to global production changes. Such changes are also hemispherically asymmetric, attributed to asymmetric production between hemispheres. For the solar proton event in 774/5 CE, 10Be shows a 15% higher deposition increase in polar regions than in tropics. This study highlights the importance of atmospheric mixing when comparing 10Be from different locations or to independent geomagnetic field records.https://doi.org/10.1029/2023GL106642cosmogenic radionuclidesECHAM6.3‐HAM2.3GEOS‐Chemsolar and geomagnetic reconstructionsatmospheric transport |
| spellingShingle | Minjie Zheng Florian Adolphi Sylvaine Ferrachat Florian Mekhaldi Zhengyao Lu Andreas Nilsson Ulrike Lohmann Modeling Atmospheric Transport of Cosmogenic Radionuclide 10Be Using GEOS‐Chem 14.1.1 and ECHAM6.3‐HAM2.3: Implications for Solar and Geomagnetic Reconstructions Geophysical Research Letters cosmogenic radionuclides ECHAM6.3‐HAM2.3 GEOS‐Chem solar and geomagnetic reconstructions atmospheric transport |
| title | Modeling Atmospheric Transport of Cosmogenic Radionuclide 10Be Using GEOS‐Chem 14.1.1 and ECHAM6.3‐HAM2.3: Implications for Solar and Geomagnetic Reconstructions |
| title_full | Modeling Atmospheric Transport of Cosmogenic Radionuclide 10Be Using GEOS‐Chem 14.1.1 and ECHAM6.3‐HAM2.3: Implications for Solar and Geomagnetic Reconstructions |
| title_fullStr | Modeling Atmospheric Transport of Cosmogenic Radionuclide 10Be Using GEOS‐Chem 14.1.1 and ECHAM6.3‐HAM2.3: Implications for Solar and Geomagnetic Reconstructions |
| title_full_unstemmed | Modeling Atmospheric Transport of Cosmogenic Radionuclide 10Be Using GEOS‐Chem 14.1.1 and ECHAM6.3‐HAM2.3: Implications for Solar and Geomagnetic Reconstructions |
| title_short | Modeling Atmospheric Transport of Cosmogenic Radionuclide 10Be Using GEOS‐Chem 14.1.1 and ECHAM6.3‐HAM2.3: Implications for Solar and Geomagnetic Reconstructions |
| title_sort | modeling atmospheric transport of cosmogenic radionuclide 10be using geos chem 14 1 1 and echam6 3 ham2 3 implications for solar and geomagnetic reconstructions |
| topic | cosmogenic radionuclides ECHAM6.3‐HAM2.3 GEOS‐Chem solar and geomagnetic reconstructions atmospheric transport |
| url | https://doi.org/10.1029/2023GL106642 |
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