The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea
<p>Peter I Island is situated in the Bellingshausen Sea, a region that has experienced considerable climate change in recent decades. Warming sea surface temperatures and reduced sea ice cover have been accompanied by warming surface air temperature, increased snowfall, and accelerated mass lo...
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Copernicus Publications
2024-11-01
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| Series: | Climate of the Past |
| Online Access: | https://cp.copernicus.org/articles/20/2525/2024/cp-20-2525-2024.pdf |
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| author | E. R. Thomas D. Tetzner B. Markle B. Markle J. Pedro J. Pedro G. Gacitúa D. E. Moser D. E. Moser S. Jackson |
| author_facet | E. R. Thomas D. Tetzner B. Markle B. Markle J. Pedro J. Pedro G. Gacitúa D. E. Moser D. E. Moser S. Jackson |
| author_sort | E. R. Thomas |
| collection | DOAJ |
| description | <p>Peter I Island is situated in the Bellingshausen Sea, a region that has experienced considerable climate change in recent decades. Warming sea surface temperatures and reduced sea ice cover have been accompanied by warming surface air temperature, increased snowfall, and accelerated mass loss over the adjacent ice sheet. Here we present data from the first firn core drilled on Peter I Island, spanning the period 2001–2017 CE. The stable water isotope data capture regional changes in surface air temperature and precipitation (snow accumulation) at the site, which are highly correlated with the surrounding Amundsen–Bellingshausen seas and the adjacent Antarctic Peninsula (<span class="inline-formula"><i>r</i></span> <span class="inline-formula"><i>></i></span> 0.6, <span class="inline-formula"><i>p</i></span> <span class="inline-formula"><i><</i></span> 0.05). The firn core data, together with the unique in situ data from an automatic weather station, confirm the high skill of the ERA5 reanalysis in capturing daily mean temperature and inter-annual precipitation variability, even over a small sub-Antarctic island. This study demonstrates the suitability of Peter I Island for future deep-ice-core drilling, with the potential to provide a valuable archive to explore ice–ocean–atmosphere interactions over decadal to centennial timescales for this dynamic region.</p> |
| format | Article |
| id | doaj-art-41acdb08c1294102800dfbba7553af6d |
| institution | Kabale University |
| issn | 1814-9324 1814-9332 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Climate of the Past |
| spelling | doaj-art-41acdb08c1294102800dfbba7553af6d2024-11-12T16:29:15ZengCopernicus PublicationsClimate of the Past1814-93241814-93322024-11-01202525253810.5194/cp-20-2525-2024The first firn core from Peter I Island – capturing climate variability across the Bellingshausen SeaE. R. Thomas0D. Tetzner1B. Markle2B. Markle3J. Pedro4J. Pedro5G. Gacitúa6D. E. Moser7D. E. Moser8S. Jackson9Ice Dynamics and Paleoclimate, British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB23 7XT, UKIce Dynamics and Paleoclimate, British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB23 7XT, UKDepartment of Geological Sciences, University of Colorado, Boulder, CO, USAInstitute of Arctic and Alpine Science, University of Colorado, Boulder, CO, USAAustralian Antarctic Division, Kingston, TAS 7050, AustraliaAustralian Antarctic Program Partnership, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS 7004, AustraliaNational Centre for Climate Research, Danish Meteorological Institute, Copenhagen, DenmarkIce Dynamics and Paleoclimate, British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB23 7XT, UKDepartment of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, UKResearch School of Earth Sciences, Australian National University, Canberra, ACT 2600, Australia<p>Peter I Island is situated in the Bellingshausen Sea, a region that has experienced considerable climate change in recent decades. Warming sea surface temperatures and reduced sea ice cover have been accompanied by warming surface air temperature, increased snowfall, and accelerated mass loss over the adjacent ice sheet. Here we present data from the first firn core drilled on Peter I Island, spanning the period 2001–2017 CE. The stable water isotope data capture regional changes in surface air temperature and precipitation (snow accumulation) at the site, which are highly correlated with the surrounding Amundsen–Bellingshausen seas and the adjacent Antarctic Peninsula (<span class="inline-formula"><i>r</i></span> <span class="inline-formula"><i>></i></span> 0.6, <span class="inline-formula"><i>p</i></span> <span class="inline-formula"><i><</i></span> 0.05). The firn core data, together with the unique in situ data from an automatic weather station, confirm the high skill of the ERA5 reanalysis in capturing daily mean temperature and inter-annual precipitation variability, even over a small sub-Antarctic island. This study demonstrates the suitability of Peter I Island for future deep-ice-core drilling, with the potential to provide a valuable archive to explore ice–ocean–atmosphere interactions over decadal to centennial timescales for this dynamic region.</p>https://cp.copernicus.org/articles/20/2525/2024/cp-20-2525-2024.pdf |
| spellingShingle | E. R. Thomas D. Tetzner B. Markle B. Markle J. Pedro J. Pedro G. Gacitúa D. E. Moser D. E. Moser S. Jackson The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea Climate of the Past |
| title | The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea |
| title_full | The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea |
| title_fullStr | The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea |
| title_full_unstemmed | The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea |
| title_short | The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea |
| title_sort | first firn core from peter i island capturing climate variability across the bellingshausen sea |
| url | https://cp.copernicus.org/articles/20/2525/2024/cp-20-2525-2024.pdf |
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