Daily to intraseasonal oscillations at Antarctic research station Neumayer
Abstract High temporal resolution (three hours) records of temperature, wind speed and sea level pressure recorded at Antarctic research station Neumayer (70°S, 8°W) during 1982–2011 are analysed to identify oscillations from daily to intraseasonal timescales. The diurnal cycle dominates the three-h...
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crcambridgeupr:10.1017/s0954102013000540 2024-03-03T08:37:07+00:00 Daily to intraseasonal oscillations at Antarctic research station Neumayer Rimbu, N. Lohmann, G. König-Langlo, G. Necula, C. Ionita, M. 2013 http://dx.doi.org/10.1017/s0954102013000540 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102013000540 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by-nc-sa/3.0/ Antarctic Science volume 26, issue 2, page 193-204 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2013 crcambridgeupr https://doi.org/10.1017/s0954102013000540 2024-02-08T08:33:34Z Abstract High temporal resolution (three hours) records of temperature, wind speed and sea level pressure recorded at Antarctic research station Neumayer (70°S, 8°W) during 1982–2011 are analysed to identify oscillations from daily to intraseasonal timescales. The diurnal cycle dominates the three-hourly time series of temperature during the Antarctic summer and is almost absent during winter. In contrast, the three-hourly time series of wind speed and sea level pressure show a weak diurnal cycle. The dominant pattern of the intraseasonal variability of these quantities, which captures the out-of-phase variation of temperature and wind speed with sea level pressure, shows enhanced variability at timescales of ∼ 40 days and ∼ 80 days, respectively. Correlation and composite analysis reveal that these oscillations may be related to tropical intraseasonal oscillations via large-scale eastward propagating atmospheric circulation wave-trains. The second pattern of intraseasonal variability, which captures in-phase variations of temperature, wind and sea level pressure, shows enhanced variability at timescales of ∼ 35, ∼ 60 and ∼ 120 days. These oscillations are attributed to the Southern Annular Mode/Antarctic Oscillation (SAM/AAO) which shows enhanced variability at these timescales. We argue that intraseasonal oscillations of tropical climate and SAM/AAO are related to distinct patterns of climate variables measured at Neumayer. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Cambridge University Press Antarctic The Antarctic Neumayer Antarctic Science 26 2 193 204 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Rimbu, N. Lohmann, G. König-Langlo, G. Necula, C. Ionita, M. Daily to intraseasonal oscillations at Antarctic research station Neumayer |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract High temporal resolution (three hours) records of temperature, wind speed and sea level pressure recorded at Antarctic research station Neumayer (70°S, 8°W) during 1982–2011 are analysed to identify oscillations from daily to intraseasonal timescales. The diurnal cycle dominates the three-hourly time series of temperature during the Antarctic summer and is almost absent during winter. In contrast, the three-hourly time series of wind speed and sea level pressure show a weak diurnal cycle. The dominant pattern of the intraseasonal variability of these quantities, which captures the out-of-phase variation of temperature and wind speed with sea level pressure, shows enhanced variability at timescales of ∼ 40 days and ∼ 80 days, respectively. Correlation and composite analysis reveal that these oscillations may be related to tropical intraseasonal oscillations via large-scale eastward propagating atmospheric circulation wave-trains. The second pattern of intraseasonal variability, which captures in-phase variations of temperature, wind and sea level pressure, shows enhanced variability at timescales of ∼ 35, ∼ 60 and ∼ 120 days. These oscillations are attributed to the Southern Annular Mode/Antarctic Oscillation (SAM/AAO) which shows enhanced variability at these timescales. We argue that intraseasonal oscillations of tropical climate and SAM/AAO are related to distinct patterns of climate variables measured at Neumayer. |
format |
Article in Journal/Newspaper |
author |
Rimbu, N. Lohmann, G. König-Langlo, G. Necula, C. Ionita, M. |
author_facet |
Rimbu, N. Lohmann, G. König-Langlo, G. Necula, C. Ionita, M. |
author_sort |
Rimbu, N. |
title |
Daily to intraseasonal oscillations at Antarctic research station Neumayer |
title_short |
Daily to intraseasonal oscillations at Antarctic research station Neumayer |
title_full |
Daily to intraseasonal oscillations at Antarctic research station Neumayer |
title_fullStr |
Daily to intraseasonal oscillations at Antarctic research station Neumayer |
title_full_unstemmed |
Daily to intraseasonal oscillations at Antarctic research station Neumayer |
title_sort |
daily to intraseasonal oscillations at antarctic research station neumayer |
publisher |
Cambridge University Press (CUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1017/s0954102013000540 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102013000540 |
geographic |
Antarctic The Antarctic Neumayer |
geographic_facet |
Antarctic The Antarctic Neumayer |
genre |
Antarc* Antarctic Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Science |
op_source |
Antarctic Science volume 26, issue 2, page 193-204 ISSN 0954-1020 1365-2079 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/3.0/ |
op_doi |
https://doi.org/10.1017/s0954102013000540 |
container_title |
Antarctic Science |
container_volume |
26 |
container_issue |
2 |
container_start_page |
193 |
op_container_end_page |
204 |
_version_ |
1792497139459293184 |