Assessment of Antarctic Amplification Based on a Reconstruction of Near-Surface Air Temperature
Polar amplification has been a research focus in climate research in recent decades. However, little attention has been paid to Antarctic amplification (AnA). We have examined the variations in annual and seasonal temperature over the Antarctic Ice Sheet and its amplification based on reconstruction...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/14/2/218 |
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| author | Jiangping Zhu Aihong Xie Xiang Qin Bing Xu Yicheng Wang |
| author_facet | Jiangping Zhu Aihong Xie Xiang Qin Bing Xu Yicheng Wang |
| author_sort | Jiangping Zhu |
| collection | DOAJ |
| description | Polar amplification has been a research focus in climate research in recent decades. However, little attention has been paid to Antarctic amplification (AnA). We have examined the variations in annual and seasonal temperature over the Antarctic Ice Sheet and its amplification based on reconstruction covering the period 2002–2018. The results show the occurrence of annual and seasonal AnA, with an AnA index greater than 1.39 with seasonal differences, and that AnA is strong in the austral winter and spring. Moreover, AnA displays regional differences, with the greatest amplification occurring in East Antarctica, with an AnA index greater than 1.51, followed by West Antarctica. AnA is always absent in the Antarctic Peninsula. In addition, amplification in East Antarctica is most conspicuous in spring, which corresponds to the obvious warming in this season; and the spring amplification signal is weakest for West Antarctica. When considering the influence of the ocean, the AnA becomes obvious, compared to when only the land is considered. Southern Annular Mode (SAM), surface pressure and westerlies work together to affect the temperature change over Antarctica and AnA; and SAM and surface pressure are highly correlated with the temperature change over East Antarctica. The picture reflects the accelerated changes in Antarctic temperature. |
| first_indexed | 2024-03-11T09:10:45Z |
| format | Article |
| id | doaj.art-24e2acb73002467e98c66a0a0cf69c20 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-11T09:10:45Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-24e2acb73002467e98c66a0a0cf69c202023-11-16T19:01:45ZengMDPI AGAtmosphere2073-44332023-01-0114221810.3390/atmos14020218Assessment of Antarctic Amplification Based on a Reconstruction of Near-Surface Air TemperatureJiangping Zhu0Aihong Xie1Xiang Qin2Bing Xu3Yicheng Wang4State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaWeather Modification Office of Liaoning Province, Shenyang 110000, ChinaLanzhou Central Meteorological Observatory, Lanzhou 730000, ChinaPolar amplification has been a research focus in climate research in recent decades. However, little attention has been paid to Antarctic amplification (AnA). We have examined the variations in annual and seasonal temperature over the Antarctic Ice Sheet and its amplification based on reconstruction covering the period 2002–2018. The results show the occurrence of annual and seasonal AnA, with an AnA index greater than 1.39 with seasonal differences, and that AnA is strong in the austral winter and spring. Moreover, AnA displays regional differences, with the greatest amplification occurring in East Antarctica, with an AnA index greater than 1.51, followed by West Antarctica. AnA is always absent in the Antarctic Peninsula. In addition, amplification in East Antarctica is most conspicuous in spring, which corresponds to the obvious warming in this season; and the spring amplification signal is weakest for West Antarctica. When considering the influence of the ocean, the AnA becomes obvious, compared to when only the land is considered. Southern Annular Mode (SAM), surface pressure and westerlies work together to affect the temperature change over Antarctica and AnA; and SAM and surface pressure are highly correlated with the temperature change over East Antarctica. The picture reflects the accelerated changes in Antarctic temperature.https://www.mdpi.com/2073-4433/14/2/218Antarctic ice sheettemperatureAntarctic amplificationreconstruction |
| spellingShingle | Jiangping Zhu Aihong Xie Xiang Qin Bing Xu Yicheng Wang Assessment of Antarctic Amplification Based on a Reconstruction of Near-Surface Air Temperature Atmosphere Antarctic ice sheet temperature Antarctic amplification reconstruction |
| title | Assessment of Antarctic Amplification Based on a Reconstruction of Near-Surface Air Temperature |
| title_full | Assessment of Antarctic Amplification Based on a Reconstruction of Near-Surface Air Temperature |
| title_fullStr | Assessment of Antarctic Amplification Based on a Reconstruction of Near-Surface Air Temperature |
| title_full_unstemmed | Assessment of Antarctic Amplification Based on a Reconstruction of Near-Surface Air Temperature |
| title_short | Assessment of Antarctic Amplification Based on a Reconstruction of Near-Surface Air Temperature |
| title_sort | assessment of antarctic amplification based on a reconstruction of near surface air temperature |
| topic | Antarctic ice sheet temperature Antarctic amplification reconstruction |
| url | https://www.mdpi.com/2073-4433/14/2/218 |
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