Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records
The longest six instrumental temperature records of monthly means reach back maximally to 1757 AD and were recorded in Europe. All six show a V-shape, with temperature drop in the 19th and rise in the 20th century. Proxy temperature time series of Antarctic ice cores show this same characteristic sh...
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Online Access: | https://doi.org/10.5194/cp-9-447-2013 https://cp.copernicus.org/articles/9/447/2013/ |
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fttriple:oai:gotriple.eu:GjWcB1ZMTLHYO3tAI2slA 2023-05-15T14:02:27+02:00 Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records Lüdecke, H.-J. Hempelmann, A. Weiss, C. O. 2018-09-27 https://doi.org/10.5194/cp-9-447-2013 https://cp.copernicus.org/articles/9/447/2013/ en eng Copernicus Publications doi:10.5194/cp-9-447-2013 10670/1.vu0f4z 1814-9324 1814-9332 https://cp.copernicus.org/articles/9/447/2013/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/cp-9-447-2013 2023-01-22T17:39:06Z The longest six instrumental temperature records of monthly means reach back maximally to 1757 AD and were recorded in Europe. All six show a V-shape, with temperature drop in the 19th and rise in the 20th century. Proxy temperature time series of Antarctic ice cores show this same characteristic shape, indicating this pattern as a global phenomenon. We used the mean of the six instrumental records for analysis by discrete Fourier transform (DFT), wavelets, and the detrended fluctuation analysis (DFA). For comparison, a stalagmite record was also analyzed by DFT. The harmonic decomposition of the abovementioned mean shows only six significant frequencies above periods over 30 yr. The Pearson correlation between the mean, smoothed by a 15-yr running average (boxcar) and the reconstruction using the six significant frequencies, yields r = 0.961. This good agreement has a > 99.9% confidence level confirmed by Monte Carlo simulations. It shows that the climate dynamics is governed at present by periodic oscillations. We find indications that observed periodicities result from intrinsic dynamics. Article in Journal/Newspaper Antarc* Antarctic Unknown Antarctic Climate of the Past 9 1 447 452 |
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geo envir Lüdecke, H.-J. Hempelmann, A. Weiss, C. O. Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records |
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geo envir |
description |
The longest six instrumental temperature records of monthly means reach back maximally to 1757 AD and were recorded in Europe. All six show a V-shape, with temperature drop in the 19th and rise in the 20th century. Proxy temperature time series of Antarctic ice cores show this same characteristic shape, indicating this pattern as a global phenomenon. We used the mean of the six instrumental records for analysis by discrete Fourier transform (DFT), wavelets, and the detrended fluctuation analysis (DFA). For comparison, a stalagmite record was also analyzed by DFT. The harmonic decomposition of the abovementioned mean shows only six significant frequencies above periods over 30 yr. The Pearson correlation between the mean, smoothed by a 15-yr running average (boxcar) and the reconstruction using the six significant frequencies, yields r = 0.961. This good agreement has a > 99.9% confidence level confirmed by Monte Carlo simulations. It shows that the climate dynamics is governed at present by periodic oscillations. We find indications that observed periodicities result from intrinsic dynamics. |
format |
Article in Journal/Newspaper |
author |
Lüdecke, H.-J. Hempelmann, A. Weiss, C. O. |
author_facet |
Lüdecke, H.-J. Hempelmann, A. Weiss, C. O. |
author_sort |
Lüdecke, H.-J. |
title |
Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records |
title_short |
Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records |
title_full |
Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records |
title_fullStr |
Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records |
title_full_unstemmed |
Multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records |
title_sort |
multi-periodic climate dynamics: spectral analysis of long-term instrumental and proxy temperature records |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-9-447-2013 https://cp.copernicus.org/articles/9/447/2013/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-9-447-2013 10670/1.vu0f4z 1814-9324 1814-9332 https://cp.copernicus.org/articles/9/447/2013/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-9-447-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
1 |
container_start_page |
447 |
op_container_end_page |
452 |
_version_ |
1766272728725192704 |