Air temperature changes in the Arctic in the period 1951–2015 in the light of observational and reanalysis data
Recent air temperature changes in the high Arctic (HA) have been investigated based on mean seasonal and annual data calculated for the period 1951–2015 and for two sub-periods 1976–2015 and 1996–2015. Two kinds of air temperature data (observational and reanalysis) have been used in the research. T...
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ftunivtorunir:oai:repozytorium.umk.pl:item/5930 2023-05-15T14:56:53+02:00 Air temperature changes in the Arctic in the period 1951–2015 in the light of observational and reanalysis data Przybylak, Rajmund Wyszyński, Przemysław 2020 http://repozytorium.umk.pl/handle/item/5930 https://doi.org/10.1007/s00704-019-02952-3 eng eng Theoretical and Applied Climatology; Theoretical and Applied Climatology, 2020, vol.139, pp.75-94. 0177-798X https://doi.org/10.1007/s00704-019-02952-3 http://repozytorium.umk.pl/handle/item/5930 http://creativecommons.org/licenses/by/3.0/pl/ Attribution 3.0 Poland info:eu-repo/semantics/openAccess CC-BY Arctic air temperature trends instrumental observations reanalyses info:eu-repo/semantics/article 2020 ftunivtorunir https://doi.org/10.1007/s00704-019-02952-3 2022-02-22T17:34:17Z Recent air temperature changes in the high Arctic (HA) have been investigated based on mean seasonal and annual data calculated for the period 1951–2015 and for two sub-periods 1976–2015 and 1996–2015. Two kinds of air temperature data (observational and reanalysis) have been used in the research. The observational data were compared with data taken from six reanalysis products (20CRv2c, CERA-20C, ERA-Int, MERRA-2, NCEP-CFSRR, JRA-55). The scale of the HA warming for the period 1996–2015 relative to the reference period 1951–1990 reached 1.6 °C for annual mean and was greatest in autumn (1.9 °C) and in winter (1.7 °C), while it was smallest in summer (0.9 °C). Evidently, the greatest warming was observed in the Atlantic and Siberian climatic regions, while in the rest of the HA, the rate of warming was usually weaker than trends calculated for the period 1976–2015. Air temperature tendencies in all study periods 1951–2015, 1976–2015 and 1996–2015 showed a predominance of positive trends that were statistically significant at the level of 0.05. In the two latter periods, the rate of warming was on average 2–3 times faster than for the entire study period. In the HA, there has not been a slowdown in the rate of warming (“hiatus”) in the last two decades (in contrast to that which was noted for the Northern Hemisphere). Our results reveal that, in most cases, the closest fit to observations was obtained for two reanalysis products (the ERA-Interim and JRA-55, since 1979) and the six reanalysis average. Two new polar amplification (PA) metrics based on scaled and standardised values of surface air temperature (SAT) reveal the non-existence of this phenomenon in the period 1951–2015. One of the metrics shows very small PA in the periods 1976–2015 and 1996–2015. Article in Journal/Newspaper Arctic Nicolaus Copernicus University (UMK) Torun: RUM@K Arctic Merra ENVELOPE(12.615,12.615,65.816,65.816) Theoretical and Applied Climatology 139 1-2 75 94 |
institution |
Open Polar |
collection |
Nicolaus Copernicus University (UMK) Torun: RUM@K |
op_collection_id |
ftunivtorunir |
language |
English |
topic |
Arctic air temperature trends instrumental observations reanalyses |
spellingShingle |
Arctic air temperature trends instrumental observations reanalyses Przybylak, Rajmund Wyszyński, Przemysław Air temperature changes in the Arctic in the period 1951–2015 in the light of observational and reanalysis data |
topic_facet |
Arctic air temperature trends instrumental observations reanalyses |
description |
Recent air temperature changes in the high Arctic (HA) have been investigated based on mean seasonal and annual data calculated for the period 1951–2015 and for two sub-periods 1976–2015 and 1996–2015. Two kinds of air temperature data (observational and reanalysis) have been used in the research. The observational data were compared with data taken from six reanalysis products (20CRv2c, CERA-20C, ERA-Int, MERRA-2, NCEP-CFSRR, JRA-55). The scale of the HA warming for the period 1996–2015 relative to the reference period 1951–1990 reached 1.6 °C for annual mean and was greatest in autumn (1.9 °C) and in winter (1.7 °C), while it was smallest in summer (0.9 °C). Evidently, the greatest warming was observed in the Atlantic and Siberian climatic regions, while in the rest of the HA, the rate of warming was usually weaker than trends calculated for the period 1976–2015. Air temperature tendencies in all study periods 1951–2015, 1976–2015 and 1996–2015 showed a predominance of positive trends that were statistically significant at the level of 0.05. In the two latter periods, the rate of warming was on average 2–3 times faster than for the entire study period. In the HA, there has not been a slowdown in the rate of warming (“hiatus”) in the last two decades (in contrast to that which was noted for the Northern Hemisphere). Our results reveal that, in most cases, the closest fit to observations was obtained for two reanalysis products (the ERA-Interim and JRA-55, since 1979) and the six reanalysis average. Two new polar amplification (PA) metrics based on scaled and standardised values of surface air temperature (SAT) reveal the non-existence of this phenomenon in the period 1951–2015. One of the metrics shows very small PA in the periods 1976–2015 and 1996–2015. |
format |
Article in Journal/Newspaper |
author |
Przybylak, Rajmund Wyszyński, Przemysław |
author_facet |
Przybylak, Rajmund Wyszyński, Przemysław |
author_sort |
Przybylak, Rajmund |
title |
Air temperature changes in the Arctic in the period 1951–2015 in the light of observational and reanalysis data |
title_short |
Air temperature changes in the Arctic in the period 1951–2015 in the light of observational and reanalysis data |
title_full |
Air temperature changes in the Arctic in the period 1951–2015 in the light of observational and reanalysis data |
title_fullStr |
Air temperature changes in the Arctic in the period 1951–2015 in the light of observational and reanalysis data |
title_full_unstemmed |
Air temperature changes in the Arctic in the period 1951–2015 in the light of observational and reanalysis data |
title_sort |
air temperature changes in the arctic in the period 1951–2015 in the light of observational and reanalysis data |
publishDate |
2020 |
url |
http://repozytorium.umk.pl/handle/item/5930 https://doi.org/10.1007/s00704-019-02952-3 |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Arctic Merra |
geographic_facet |
Arctic Merra |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Theoretical and Applied Climatology; Theoretical and Applied Climatology, 2020, vol.139, pp.75-94. 0177-798X https://doi.org/10.1007/s00704-019-02952-3 http://repozytorium.umk.pl/handle/item/5930 |
op_rights |
http://creativecommons.org/licenses/by/3.0/pl/ Attribution 3.0 Poland info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00704-019-02952-3 |
container_title |
Theoretical and Applied Climatology |
container_volume |
139 |
container_issue |
1-2 |
container_start_page |
75 |
op_container_end_page |
94 |
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1766328940400476160 |