Impact of precipitation intermittency on NAO-temperature signals in proxy records
International audience In mid and high latitudes, the stable isotope ratio in precipitation is driven by changes in temperature, which control atmospheric distillation. This relationship forms the basis for many continental paleoclimatic reconstructions using direct (e.g. ice cores) or indirect (e.g...
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ftsorbonneuniv:oai:HAL:hal-04114084v1 2023-06-18T03:40:26+02:00 Impact of precipitation intermittency on NAO-temperature signals in proxy records Casado, M. Ortega, P. Masson-Delmotte, V. Risi, C. Swingedouw, D. Daux, V. Genty, D. Maignan, F. Solomina, O. Vinther, B. Viovy, N. Yiou, P. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) 2013 https://hal.science/hal-04114084 https://doi.org/10.5194/cp-9-871-201310.5194/cpd-8-4957-2012 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-871-201310.5194/cpd-8-4957-2012 hal-04114084 https://hal.science/hal-04114084 BIBCODE: 2013CliPa.9.871C doi:10.5194/cp-9-871-201310.5194/cpd-8-4957-2012 Climate of the Past https://hal.science/hal-04114084 Climate of the Past, 2013, 9, pp.871-886. ⟨10.5194/cp-9-871-201310.5194/cpd-8-4957-2012⟩ Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2013 ftsorbonneuniv https://doi.org/10.5194/cp-9-871-201310.5194/cpd-8-4957-2012 2023-06-06T22:47:47Z International audience In mid and high latitudes, the stable isotope ratio in precipitation is driven by changes in temperature, which control atmospheric distillation. This relationship forms the basis for many continental paleoclimatic reconstructions using direct (e.g. ice cores) or indirect (e.g. tree ring cellulose, speleothem calcite) archives of past precipitation. However, the archiving process is inherently biased by intermittency of precipitation. Here, we use two sets of atmospheric reanalyses (NCEP (National Centers for Environmental Prediction) and ERA-interim) to quantify this precipitation intermittency bias, by comparing seasonal (winter and summer) temperatures estimated with and without precipitation weighting. We show that this bias reaches up to 10 °C and has large interannual variability. We then assess the impact of precipitation intermittency on the strength and stability of temporal correlations between seasonal temperatures and the North Atlantic Oscillation (NAO). Precipitation weighting reduces the correlation between winter NAO and temperature in some areas (e.g. Québec, South-East USA, East Greenland, East Siberia, Mediterranean sector) but does not alter the main patterns of correlation. The correlations between NAO, δ 18 O in precipitation, temperature and precipitation weighted temperature are investigated using outputs of an atmospheric general circulation model enabled with stable isotopes and nudged using reanalyses (LMDZiso (Laboratoire de Météorologie Dynamique Zoom)). In winter, LMDZiso shows similar correlation values between the NAO and both the precipitation weighted temperature and δ 18 O in precipitation, thus suggesting limited impacts of moisture origin. Correlations of comparable magnitude are obtained for the available observational evidence (GNIP (Global Network of Isotopes in Precipitation) and Greenland ice core data). Our findings support the use of archives of past δ 18 O for NAO reconstructions. Article in Journal/Newspaper East Greenland Greenland Greenland ice core ice core North Atlantic North Atlantic oscillation Siberia HAL Sorbonne Université Greenland |
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Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
Earth Science [SDU]Sciences of the Universe [physics] Casado, M. Ortega, P. Masson-Delmotte, V. Risi, C. Swingedouw, D. Daux, V. Genty, D. Maignan, F. Solomina, O. Vinther, B. Viovy, N. Yiou, P. Impact of precipitation intermittency on NAO-temperature signals in proxy records |
topic_facet |
Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience In mid and high latitudes, the stable isotope ratio in precipitation is driven by changes in temperature, which control atmospheric distillation. This relationship forms the basis for many continental paleoclimatic reconstructions using direct (e.g. ice cores) or indirect (e.g. tree ring cellulose, speleothem calcite) archives of past precipitation. However, the archiving process is inherently biased by intermittency of precipitation. Here, we use two sets of atmospheric reanalyses (NCEP (National Centers for Environmental Prediction) and ERA-interim) to quantify this precipitation intermittency bias, by comparing seasonal (winter and summer) temperatures estimated with and without precipitation weighting. We show that this bias reaches up to 10 °C and has large interannual variability. We then assess the impact of precipitation intermittency on the strength and stability of temporal correlations between seasonal temperatures and the North Atlantic Oscillation (NAO). Precipitation weighting reduces the correlation between winter NAO and temperature in some areas (e.g. Québec, South-East USA, East Greenland, East Siberia, Mediterranean sector) but does not alter the main patterns of correlation. The correlations between NAO, δ 18 O in precipitation, temperature and precipitation weighted temperature are investigated using outputs of an atmospheric general circulation model enabled with stable isotopes and nudged using reanalyses (LMDZiso (Laboratoire de Météorologie Dynamique Zoom)). In winter, LMDZiso shows similar correlation values between the NAO and both the precipitation weighted temperature and δ 18 O in precipitation, thus suggesting limited impacts of moisture origin. Correlations of comparable magnitude are obtained for the available observational evidence (GNIP (Global Network of Isotopes in Precipitation) and Greenland ice core data). Our findings support the use of archives of past δ 18 O for NAO reconstructions. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) |
format |
Article in Journal/Newspaper |
author |
Casado, M. Ortega, P. Masson-Delmotte, V. Risi, C. Swingedouw, D. Daux, V. Genty, D. Maignan, F. Solomina, O. Vinther, B. Viovy, N. Yiou, P. |
author_facet |
Casado, M. Ortega, P. Masson-Delmotte, V. Risi, C. Swingedouw, D. Daux, V. Genty, D. Maignan, F. Solomina, O. Vinther, B. Viovy, N. Yiou, P. |
author_sort |
Casado, M. |
title |
Impact of precipitation intermittency on NAO-temperature signals in proxy records |
title_short |
Impact of precipitation intermittency on NAO-temperature signals in proxy records |
title_full |
Impact of precipitation intermittency on NAO-temperature signals in proxy records |
title_fullStr |
Impact of precipitation intermittency on NAO-temperature signals in proxy records |
title_full_unstemmed |
Impact of precipitation intermittency on NAO-temperature signals in proxy records |
title_sort |
impact of precipitation intermittency on nao-temperature signals in proxy records |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-04114084 https://doi.org/10.5194/cp-9-871-201310.5194/cpd-8-4957-2012 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland Greenland Greenland ice core ice core North Atlantic North Atlantic oscillation Siberia |
genre_facet |
East Greenland Greenland Greenland ice core ice core North Atlantic North Atlantic oscillation Siberia |
op_source |
Climate of the Past https://hal.science/hal-04114084 Climate of the Past, 2013, 9, pp.871-886. ⟨10.5194/cp-9-871-201310.5194/cpd-8-4957-2012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-871-201310.5194/cpd-8-4957-2012 hal-04114084 https://hal.science/hal-04114084 BIBCODE: 2013CliPa.9.871C doi:10.5194/cp-9-871-201310.5194/cpd-8-4957-2012 |
op_doi |
https://doi.org/10.5194/cp-9-871-201310.5194/cpd-8-4957-2012 |
_version_ |
1769005488948641792 |