Paleoenvironmental analysis of sediment core MD03-2601
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2012
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| Acceso en línea: | |
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| _version_ | 1867170463378046976 |
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| author | Denis, Delphine Crosta, Xavier Schmidt, Sabine Carson, Damien S Ganeshram, Raja S Renssen, Hans Bout-Roumazeilles, Viviane Zaragosi, Sebastien Martin, Bernard Cremer, Michel Giraudeau, Jacques |
| author_facet | Denis, Delphine Crosta, Xavier Schmidt, Sabine Carson, Damien S Ganeshram, Raja S Renssen, Hans Bout-Roumazeilles, Viviane Zaragosi, Sebastien Martin, Bernard Cremer, Michel Giraudeau, Jacques |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | This study presents a high-resolution multi-proxy investigation of sediment core MD03-2601 and documents major glacier oscillations and deep water activity during the Holocene in the Adélie Land region, East Antarctica. A comparison with surface ocean conditions reveals synchronous changes of glaciers, sea ice and deep water formation at Milankovitch and sub-Milankovitch time scales. We report (1) a deglaciation of the Adélie Land continental shelf from 11 to 8.5 cal ka BP, which occurred in two phases of effective glacier grounding-line retreat at 10.6 and 9 cal ka BP, associated with active deep water formation; (2) a rapid glacier and sea ice readvance centred around 7.7 cal ka BP; and (3) five rapid expansions of the glacier-sea ice systems, during the Mid to Late Holocene, associated to a long-term increase of deep water formation. At Milankovich time scales, we show that the precessionnal component of insolation at high and low latitudes explains the major trend of the glacier-sea ice-ocean system throughout the Holocene, in the Adélie Land region. In addition, the orbitally-forced seasonality seems to control the coastal deep water formation via the sea ice-ocean coupling, which could lead to opposite patterns between north and south high latitudes during the Mid to Late Holocene. At sub-Milankovitch time scales, there are eight events of glacier-sea ice retreat and expansion that occurred during atmospheric cooling events over East Antarctica. Comparisons of our results with other peri-Antarctic records and model simulations from high southern latitudes may suggest that our interpretation on glacier-sea ice-ocean interactions and their Holocene evolutions reflect a more global Antarctic Holocene pattern. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_788334 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Paleoenvironmental analysis of sediment core MD03-2601 Denis, Delphine Crosta, Xavier Schmidt, Sabine Carson, Damien S Ganeshram, Raja S Renssen, Hans Bout-Roumazeilles, Viviane Zaragosi, Sebastien Martin, Bernard Cremer, Michel Giraudeau, Jacques CALYPSO; Calypso Corer; IMAGES; IMAGES X - CADO; International Marine Global Change Study; Marion Dufresne (1995); MD032601; MD03-2601; MD130; Southern Ocean This study presents a high-resolution multi-proxy investigation of sediment core MD03-2601 and documents major glacier oscillations and deep water activity during the Holocene in the Adélie Land region, East Antarctica. A comparison with surface ocean conditions reveals synchronous changes of glaciers, sea ice and deep water formation at Milankovitch and sub-Milankovitch time scales. We report (1) a deglaciation of the Adélie Land continental shelf from 11 to 8.5 cal ka BP, which occurred in two phases of effective glacier grounding-line retreat at 10.6 and 9 cal ka BP, associated with active deep water formation; (2) a rapid glacier and sea ice readvance centred around 7.7 cal ka BP; and (3) five rapid expansions of the glacier-sea ice systems, during the Mid to Late Holocene, associated to a long-term increase of deep water formation. At Milankovich time scales, we show that the precessionnal component of insolation at high and low latitudes explains the major trend of the glacier-sea ice-ocean system throughout the Holocene, in the Adélie Land region. In addition, the orbitally-forced seasonality seems to control the coastal deep water formation via the sea ice-ocean coupling, which could lead to opposite patterns between north and south high latitudes during the Mid to Late Holocene. At sub-Milankovitch time scales, there are eight events of glacier-sea ice retreat and expansion that occurred during atmospheric cooling events over East Antarctica. Comparisons of our results with other peri-Antarctic records and model simulations from high southern latitudes may suggest that our interpretation on glacier-sea ice-ocean interactions and their Holocene evolutions reflect a more global Antarctic Holocene pattern. |
| title | Paleoenvironmental analysis of sediment core MD03-2601 |
| topic | CALYPSO; Calypso Corer; IMAGES; IMAGES X - CADO; International Marine Global Change Study; Marion Dufresne (1995); MD032601; MD03-2601; MD130; Southern Ocean |
| url | https://doi.org/10.1594/PANGAEA.788334 |