Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years
We use isotopic composition (<i>δ</i>D) data from six sites in Princess Elizabeth Land (PEL) in order to reconstruct air temperature variability in this sector of East Antarctica over the last 350 years. First, we use the present-day instrumental mean annual surface air temperature data...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-01-01
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| Series: | Climate of the Past |
| Online Access: | http://www.clim-past.net/13/61/2017/cp-13-61-2017.pdf |
| _version_ | 1828157561888571392 |
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| author | A. A. Ekaykin D. O. Vladimirova V. Y. Lipenkov V. Masson-Delmotte |
| author_facet | A. A. Ekaykin D. O. Vladimirova V. Y. Lipenkov V. Masson-Delmotte |
| author_sort | A. A. Ekaykin |
| collection | DOAJ |
| description | We use isotopic composition (<i>δ</i>D) data from six
sites in Princess Elizabeth Land (PEL) in order to reconstruct air
temperature variability in this sector of East Antarctica over the last
350 years. First, we use the present-day instrumental mean annual surface air
temperature data to demonstrate that the studied region (between Russia's
Progress, Vostok and Mirny research stations) is characterized by uniform
temperature variability. We thus construct a stacked record of the
temperature anomaly for the whole sector for the period of 1958–2015. A
comparison of this series with the Southern Hemisphere climatic indices shows
that the short-term inter-annual temperature variability is primarily
governed by the Antarctic Oscillation (AAO) and Interdecadal Pacific
Oscillation (IPO) modes of atmospheric variability. However, the
low-frequency temperature variability (with period > 27 years) is mainly
related to the anomalies of the Indian Ocean Dipole (IOD) mode. We then
construct a stacked record of <i>δ</i>D for the PEL for the period of
1654–2009 from individual normalized and filtered isotopic records obtained
at six different sites (<q>PEL2016</q> stacked record). We use a linear
regression of this record and the stacked PEL temperature record (with an
apparent slope of 9 ± 5.4 ‰ °C<sup>−1</sup>) to convert
PEL2016 into a temperature scale. Analysis of PEL2016 shows a
1 ± 0.6 °C warming in this region over the last 3 centuries,
with a particularly cold period from the mid-18th to the mid-19th century. A
peak of cooling occurred in the 1840s – a feature previously observed in
other Antarctic records. We reveal that PEL2016 correlates with a
low-frequency component of IOD and suggest that the IOD mode influences the
Antarctic climate by modulating the activity of cyclones that bring heat and
moisture to Antarctica. We also compare PEL2016 with other Antarctic stacked
isotopic records. This work is a contribution to the PAGES (Past Global
Changes) and IPICS (International Partnerships in Ice Core Sciences)
Antarctica 2k projects. |
| first_indexed | 2024-04-11T23:30:47Z |
| format | Article |
| id | doaj.art-0858fc9d580a495b8519c0078b91293f |
| institution | Directory Open Access Journal |
| issn | 1814-9324 1814-9332 |
| language | English |
| last_indexed | 2024-04-11T23:30:47Z |
| publishDate | 2017-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Climate of the Past |
| spelling | doaj.art-0858fc9d580a495b8519c0078b91293f2022-12-22T03:57:08ZengCopernicus PublicationsClimate of the Past1814-93241814-93322017-01-01131617110.5194/cp-13-61-2017Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 yearsA. A. Ekaykin0D. O. Vladimirova1V. Y. Lipenkov2V. Masson-Delmotte3Climate and Environmental Research Laboratory, Arctic and Antarctic Research Institute, St Petersburg, RussiaClimate and Environmental Research Laboratory, Arctic and Antarctic Research Institute, St Petersburg, RussiaClimate and Environmental Research Laboratory, Arctic and Antarctic Research Institute, St Petersburg, RussiaLaboratoire des Sciences du Climat et de l'Environnement – IPSL, UMR 8212, CEA-CNRS-UVSQ-Université Paris Saclay, Gif-sur-Yvette, FranceWe use isotopic composition (<i>δ</i>D) data from six sites in Princess Elizabeth Land (PEL) in order to reconstruct air temperature variability in this sector of East Antarctica over the last 350 years. First, we use the present-day instrumental mean annual surface air temperature data to demonstrate that the studied region (between Russia's Progress, Vostok and Mirny research stations) is characterized by uniform temperature variability. We thus construct a stacked record of the temperature anomaly for the whole sector for the period of 1958–2015. A comparison of this series with the Southern Hemisphere climatic indices shows that the short-term inter-annual temperature variability is primarily governed by the Antarctic Oscillation (AAO) and Interdecadal Pacific Oscillation (IPO) modes of atmospheric variability. However, the low-frequency temperature variability (with period > 27 years) is mainly related to the anomalies of the Indian Ocean Dipole (IOD) mode. We then construct a stacked record of <i>δ</i>D for the PEL for the period of 1654–2009 from individual normalized and filtered isotopic records obtained at six different sites (<q>PEL2016</q> stacked record). We use a linear regression of this record and the stacked PEL temperature record (with an apparent slope of 9 ± 5.4 ‰ °C<sup>−1</sup>) to convert PEL2016 into a temperature scale. Analysis of PEL2016 shows a 1 ± 0.6 °C warming in this region over the last 3 centuries, with a particularly cold period from the mid-18th to the mid-19th century. A peak of cooling occurred in the 1840s – a feature previously observed in other Antarctic records. We reveal that PEL2016 correlates with a low-frequency component of IOD and suggest that the IOD mode influences the Antarctic climate by modulating the activity of cyclones that bring heat and moisture to Antarctica. We also compare PEL2016 with other Antarctic stacked isotopic records. This work is a contribution to the PAGES (Past Global Changes) and IPICS (International Partnerships in Ice Core Sciences) Antarctica 2k projects.http://www.clim-past.net/13/61/2017/cp-13-61-2017.pdf |
| spellingShingle | A. A. Ekaykin D. O. Vladimirova V. Y. Lipenkov V. Masson-Delmotte Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years Climate of the Past |
| title | Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years |
| title_full | Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years |
| title_fullStr | Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years |
| title_full_unstemmed | Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years |
| title_short | Climatic variability in Princess Elizabeth Land (East Antarctica) over the last 350 years |
| title_sort | climatic variability in princess elizabeth land east antarctica over the last 350 years |
| url | http://www.clim-past.net/13/61/2017/cp-13-61-2017.pdf |
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