What controls the isotopic composition of Greenland surface snow?
International audience Water stable isotopes in Greenland ice core data provide key paleoclimatic information, and have been compared with precipitation isotopic composition simulated by isotopically enabled atmospheric models. However, post-depositional processes linked with snow metamorphism remai...
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2014
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Online Access: | https://hal.science/hal-04114644 https://doi.org/10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 |
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openpolar |
institution |
Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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language |
English |
topic |
Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
Earth Science [SDU]Sciences of the Universe [physics] Steen-Larsen, H. C. Masson-Delmotte, V. Hirabayashi, M. Winkler, R. Satow, K. Prié, F. Bayou, N. Brun, E. Cuffey, K. M. Dahl-Jensen, D. Dumont, M. Guillevic, M. Kipfstuhl, S. Landais, A. Popp, T. Risi, C. Steffen, K. Stenni, B. Sveinbjörnsdottír, A. E. What controls the isotopic composition of Greenland surface snow? |
topic_facet |
Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience Water stable isotopes in Greenland ice core data provide key paleoclimatic information, and have been compared with precipitation isotopic composition simulated by isotopically enabled atmospheric models. However, post-depositional processes linked with snow metamorphism remain poorly documented. For this purpose, monitoring of the isotopic composition (δ 18 O, δD) of near-surface water vapor, precipitation and samples of the top (0.5 cm) snow surface has been conducted during two summers (2011-2012) at NEEM, NW Greenland. The samples also include a subset of 17 O-excess measurements over 4 days, and the measurements span the 2012 Greenland heat wave. Our observations are consistent with calculations assuming isotopic equilibrium between surface snow and water vapor. We observe a strong correlation between near-surface vapor δ 18 O and air temperature (0.85 ± 0.11‰ °C -1 (R = 0.76) for 2012). The correlation with air temperature is not observed in precipitation data or surface snow data. Deuterium excess (d-excess) is strongly anti-correlated with δ 18 O with a stronger slope for vapor than for precipitation and snow surface data. During nine 1-5-day periods between precipitation events, our data demonstrate parallel changes of δ 18 O and d-excess in surface snow and near-surface vapor. The changes in δ 18 O of the vapor are similar or larger than those of the snow δ 18 O. It is estimated using the CROCUS snow model that 6 to 20% of the surface snow mass is exchanged with the atmosphere. In our data, the sign of surface snow isotopic changes is not related to the sign or magnitude of sublimation or deposition. Comparisons with atmospheric models show that day-to-day variations in near-surface vapor isotopic composition are driven by synoptic variations and changes in air mass trajectories and distillation histories. We suggest that, in between precipitation events, changes in the surface snow isotopic composition are driven by these changes in near-surface vapor isotopic composition. ... |
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) Météo-France 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 |
Steen-Larsen, H. C. Masson-Delmotte, V. Hirabayashi, M. Winkler, R. Satow, K. Prié, F. Bayou, N. Brun, E. Cuffey, K. M. Dahl-Jensen, D. Dumont, M. Guillevic, M. Kipfstuhl, S. Landais, A. Popp, T. Risi, C. Steffen, K. Stenni, B. Sveinbjörnsdottír, A. E. |
author_facet |
Steen-Larsen, H. C. Masson-Delmotte, V. Hirabayashi, M. Winkler, R. Satow, K. Prié, F. Bayou, N. Brun, E. Cuffey, K. M. Dahl-Jensen, D. Dumont, M. Guillevic, M. Kipfstuhl, S. Landais, A. Popp, T. Risi, C. Steffen, K. Stenni, B. Sveinbjörnsdottír, A. E. |
author_sort |
Steen-Larsen, H. C. |
title |
What controls the isotopic composition of Greenland surface snow? |
title_short |
What controls the isotopic composition of Greenland surface snow? |
title_full |
What controls the isotopic composition of Greenland surface snow? |
title_fullStr |
What controls the isotopic composition of Greenland surface snow? |
title_full_unstemmed |
What controls the isotopic composition of Greenland surface snow? |
title_sort |
what controls the isotopic composition of greenland surface snow? |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-04114644 https://doi.org/10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core |
genre_facet |
Greenland Greenland ice core ice core |
op_source |
Climate of the Past https://hal.science/hal-04114644 Climate of the Past, 2014, 10, pp.377-392. ⟨10.5194/cp-10-377-201410.5194/cpd-9-6035-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 hal-04114644 https://hal.science/hal-04114644 BIBCODE: 2014CliPa.10.377S doi:10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 |
op_doi |
https://doi.org/10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 |
_version_ |
1769006230189113344 |
spelling |
ftinsu:oai:HAL:hal-04114644v1 2023-06-18T03:40:52+02:00 What controls the isotopic composition of Greenland surface snow? Steen-Larsen, H. C. Masson-Delmotte, V. Hirabayashi, M. Winkler, R. Satow, K. Prié, F. Bayou, N. Brun, E. Cuffey, K. M. Dahl-Jensen, D. Dumont, M. Guillevic, M. Kipfstuhl, S. Landais, A. Popp, T. Risi, C. Steffen, K. Stenni, B. Sveinbjörnsdottír, A. E. 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) Météo-France 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) 2014 https://hal.science/hal-04114644 https://doi.org/10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 hal-04114644 https://hal.science/hal-04114644 BIBCODE: 2014CliPa.10.377S doi:10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 Climate of the Past https://hal.science/hal-04114644 Climate of the Past, 2014, 10, pp.377-392. ⟨10.5194/cp-10-377-201410.5194/cpd-9-6035-2013⟩ Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2014 ftinsu https://doi.org/10.5194/cp-10-377-201410.5194/cpd-9-6035-2013 2023-06-05T19:25:57Z International audience Water stable isotopes in Greenland ice core data provide key paleoclimatic information, and have been compared with precipitation isotopic composition simulated by isotopically enabled atmospheric models. However, post-depositional processes linked with snow metamorphism remain poorly documented. For this purpose, monitoring of the isotopic composition (δ 18 O, δD) of near-surface water vapor, precipitation and samples of the top (0.5 cm) snow surface has been conducted during two summers (2011-2012) at NEEM, NW Greenland. The samples also include a subset of 17 O-excess measurements over 4 days, and the measurements span the 2012 Greenland heat wave. Our observations are consistent with calculations assuming isotopic equilibrium between surface snow and water vapor. We observe a strong correlation between near-surface vapor δ 18 O and air temperature (0.85 ± 0.11‰ °C -1 (R = 0.76) for 2012). The correlation with air temperature is not observed in precipitation data or surface snow data. Deuterium excess (d-excess) is strongly anti-correlated with δ 18 O with a stronger slope for vapor than for precipitation and snow surface data. During nine 1-5-day periods between precipitation events, our data demonstrate parallel changes of δ 18 O and d-excess in surface snow and near-surface vapor. The changes in δ 18 O of the vapor are similar or larger than those of the snow δ 18 O. It is estimated using the CROCUS snow model that 6 to 20% of the surface snow mass is exchanged with the atmosphere. In our data, the sign of surface snow isotopic changes is not related to the sign or magnitude of sublimation or deposition. Comparisons with atmospheric models show that day-to-day variations in near-surface vapor isotopic composition are driven by synoptic variations and changes in air mass trajectories and distillation histories. We suggest that, in between precipitation events, changes in the surface snow isotopic composition are driven by these changes in near-surface vapor isotopic composition. ... Article in Journal/Newspaper Greenland Greenland ice core ice core Institut national des sciences de l'Univers: HAL-INSU Greenland |