Deuterium isotope ratios of Victoria Lower Glacier Ice Core
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2011
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| _version_ | 1867167674813906944 |
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| author | Bertler, Nancy A Mayewski, Paul Andrew Carter, Lionel |
| author_facet | Bertler, Nancy A Mayewski, Paul Andrew Carter, Lionel |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Little Ice Age (LIA) is one of the most prominent climate shifts in the past 5000 yrs. It has been suggested that the LIA might be the most recent of the Dansgaard-Oeschger events, which are better known as abrupt, large scale climate oscillations during the last glacial period. If the case, then according to Broecker (2000a, 2000b) Antarctica should have warmed during the LIA, when the Northern Hemisphere was cold. Here we present new data from the Ross Sea, Antarctica, that indicates surface temperatures were ~2 °C colder during the LIA, with colder sea surface temperatures in the Southern Ocean and/or increased sea-ice extent, stronger katabatic winds, and decreased snow accumulation. Whilst we find there was large spatial and temporal variability, overall Antarctica was cooler and stormier during the LIA. Although temperatures have warmed since the termination of the LIA, atmospheric circulation strength has remained at the same, elevated level. We conclude, that the LIA was either caused by alternative forcings, or that the sea-saw mechanism operates differently during warm periods. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_866368 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Deuterium isotope ratios of Victoria Lower Glacier Ice Core Bertler, Nancy A Mayewski, Paul Andrew Carter, Lionel ICEDRILL; Ice drill; Ross Sea Region, Antarctica; VLG_DSS The Little Ice Age (LIA) is one of the most prominent climate shifts in the past 5000 yrs. It has been suggested that the LIA might be the most recent of the Dansgaard-Oeschger events, which are better known as abrupt, large scale climate oscillations during the last glacial period. If the case, then according to Broecker (2000a, 2000b) Antarctica should have warmed during the LIA, when the Northern Hemisphere was cold. Here we present new data from the Ross Sea, Antarctica, that indicates surface temperatures were ~2 °C colder during the LIA, with colder sea surface temperatures in the Southern Ocean and/or increased sea-ice extent, stronger katabatic winds, and decreased snow accumulation. Whilst we find there was large spatial and temporal variability, overall Antarctica was cooler and stormier during the LIA. Although temperatures have warmed since the termination of the LIA, atmospheric circulation strength has remained at the same, elevated level. We conclude, that the LIA was either caused by alternative forcings, or that the sea-saw mechanism operates differently during warm periods. |
| title | Deuterium isotope ratios of Victoria Lower Glacier Ice Core |
| topic | ICEDRILL; Ice drill; Ross Sea Region, Antarctica; VLG_DSS |
| url | https://doi.org/10.1594/PANGAEA.866368 |