Iron (Fe) concentrations and fluxes in TALDICE ice core 0.6 to 314 ky BP
Fuente:
PANGAEA
Guardado en:
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2013
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1867170959377563648 |
|---|---|
| author | Vallelonga, Paul T Barbante, Carlo Cozzi, Giulio Gabrieli, Jacopo Schüpbach, Simon Spolaor, Andrea Turetta, Clara |
| author_facet | Vallelonga, Paul T Barbante, Carlo Cozzi, Giulio Gabrieli, Jacopo Schüpbach, Simon Spolaor, Andrea Turetta, Clara |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for the coastal Antarctic Talos Dome ice core, based on acid leachable Fe concentrations. Fluxes of Fe to Talos Dome were consistently greater than those at Dome C, with the greatest difference observed during interglacial climates. We observe different Fe flux trends at Dome C and Talos Dome during the deglaciation and early Holocene, attributed to a combination of deglacial activation of dust sources local to Talos Dome and the reorganisation of atmospheric transport pathways with the retreat of the Ross Sea ice shelf. This supports similar findings based on dust particle sizes and fluxes and Rare Earth Element fluxes. We show that Ca and Fe should not be used as quantitative proxies for mineral dust, as they all demonstrate different deglacial trends at Talos Dome and Dome C. Considering that a 20 ppmv decrease in atmospheric CO2 at the coldest part of the last glacial maximum occurs contemporaneously with the period of greatest Fe and dust flux to Antarctica, we confirm that the maximum contribution of aeolian dust deposition to Southern Ocean sequestration of atmospheric CO2 is approximately 20 ppmv. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_808940 |
| institution | PANGAEA |
| language | en |
| publishDate | 2013 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Iron (Fe) concentrations and fluxes in TALDICE ice core 0.6 to 314 ky BP Vallelonga, Paul T Barbante, Carlo Cozzi, Giulio Gabrieli, Jacopo Schüpbach, Simon Spolaor, Andrea Turetta, Clara Accumulation of snow/ice per year; AGE; Antarctica; Calcium, flux; DEPTH, ice/snow; Electromechanical drill; EMD; Iron; Iron, flux; Number; TALDICE; Talos Dome; Talos Dome Ice Core Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for the coastal Antarctic Talos Dome ice core, based on acid leachable Fe concentrations. Fluxes of Fe to Talos Dome were consistently greater than those at Dome C, with the greatest difference observed during interglacial climates. We observe different Fe flux trends at Dome C and Talos Dome during the deglaciation and early Holocene, attributed to a combination of deglacial activation of dust sources local to Talos Dome and the reorganisation of atmospheric transport pathways with the retreat of the Ross Sea ice shelf. This supports similar findings based on dust particle sizes and fluxes and Rare Earth Element fluxes. We show that Ca and Fe should not be used as quantitative proxies for mineral dust, as they all demonstrate different deglacial trends at Talos Dome and Dome C. Considering that a 20 ppmv decrease in atmospheric CO2 at the coldest part of the last glacial maximum occurs contemporaneously with the period of greatest Fe and dust flux to Antarctica, we confirm that the maximum contribution of aeolian dust deposition to Southern Ocean sequestration of atmospheric CO2 is approximately 20 ppmv. |
| title | Iron (Fe) concentrations and fluxes in TALDICE ice core 0.6 to 314 ky BP |
| topic | Accumulation of snow/ice per year; AGE; Antarctica; Calcium, flux; DEPTH, ice/snow; Electromechanical drill; EMD; Iron; Iron, flux; Number; TALDICE; Talos Dome; Talos Dome Ice Core |
| url | https://doi.org/10.1594/PANGAEA.808940 |