Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean
Due to the recent and severe downtrend in sea ice coverage, Arctic-derived moisture serves as new, increasingly important, water source for the northern hemisphere. Feedback and exchange processes between the different hydrological compartments of the Arctic might be tracked by stable water isotopol...
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ftawi:oai:epic.awi.de:56275 2024-09-15T17:51:34+00:00 Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean Brunello, Camilla F. Meyer, Hanno Mellat, Moein Werner, Martin 2021-11-17 application/pdf https://epic.awi.de/id/eprint/56275/ https://epic.awi.de/id/eprint/56275/1/Brunello_IsotopeWorkshop_2021_poster_final.pdf https://hdl.handle.net/10013/epic.be5672bb-3714-452d-aa38-20f934e55bdb unknown https://epic.awi.de/id/eprint/56275/1/Brunello_IsotopeWorkshop_2021_poster_final.pdf Brunello, C. F. orcid:0000-0002-4206-5852 , Meyer, H. orcid:0000-0003-4129-4706 , Mellat, M. orcid:0000-0001-7262-9906 and Werner, M. orcid:0000-0002-6473-0243 (2021) Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean , Water Isotopes: From Weather to Climate, Geophysical Institute, UiB, 17 November 2021 - 19 November 2021 . hdl:10013/epic.be5672bb-3714-452d-aa38-20f934e55bdb EPIC3Water Isotopes: From Weather to Climate, Geophysical Institute, UiB, 2021-11-17-2021-11-19 Conference notRev 2021 ftawi 2024-06-24T04:28:46Z Due to the recent and severe downtrend in sea ice coverage, Arctic-derived moisture serves as new, increasingly important, water source for the northern hemisphere. Feedback and exchange processes between the different hydrological compartments of the Arctic might be tracked by stable water isotopologues (H216O, H218O, HD16O). This is possible as evaporative sources, phase changes and transport history have a specific imprint on the isotopic compositions. The MOSAiC drift experiment offered the unique possibility to tackle the main hydrological processes occurring in the Central Arctic, covering a complete seasonal cycle, including the understudied Arctic winter. A Cavity Ring Down Spectrometer (CRDS) was installed on board of RV Polarstern and atmospheric humidity, δ18O, δD and d-excess were observed continuously from October 2019 to October 2020. Simultaneously, isotopic changes of water vapour have been measured by international partners at several land-based Arctic stations. A first analysis of the Polarstern isotopic vapour dataset reveals a range of 30‰ (min=-48.4; max=-11.4; mean=-32.4) variations in δ18Ο of atmospheric water vapour. A clear seasonal cycle with the most depleted values occurring in the dry and cold winter months and increasingly enriched values in spring, peaking in August is noticed. Strong, positive correlation is found with both local specific humidity (r2 = 0.87) and air temperature (r2=0.81). Several short-term events on synoptical time scales with abrupt fluctuations in the isotopic composition are detected throughout the entire dataset, especially during the freeze up phase (Oct-Nov) and the transition from frozen conditions to summer melt (Apr-Jun). Preliminary comparison of the Polarstern data with measurements from different Arctic stations indicates a strong influence of sea ice coverage on the isotopic signal. For an in-depth understanding of the observed isotopic changes, we quantitatively compare the measured isotopic signatures with model results from an ECHAM6 atmosphere ... Conference Object Arctic Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Due to the recent and severe downtrend in sea ice coverage, Arctic-derived moisture serves as new, increasingly important, water source for the northern hemisphere. Feedback and exchange processes between the different hydrological compartments of the Arctic might be tracked by stable water isotopologues (H216O, H218O, HD16O). This is possible as evaporative sources, phase changes and transport history have a specific imprint on the isotopic compositions. The MOSAiC drift experiment offered the unique possibility to tackle the main hydrological processes occurring in the Central Arctic, covering a complete seasonal cycle, including the understudied Arctic winter. A Cavity Ring Down Spectrometer (CRDS) was installed on board of RV Polarstern and atmospheric humidity, δ18O, δD and d-excess were observed continuously from October 2019 to October 2020. Simultaneously, isotopic changes of water vapour have been measured by international partners at several land-based Arctic stations. A first analysis of the Polarstern isotopic vapour dataset reveals a range of 30‰ (min=-48.4; max=-11.4; mean=-32.4) variations in δ18Ο of atmospheric water vapour. A clear seasonal cycle with the most depleted values occurring in the dry and cold winter months and increasingly enriched values in spring, peaking in August is noticed. Strong, positive correlation is found with both local specific humidity (r2 = 0.87) and air temperature (r2=0.81). Several short-term events on synoptical time scales with abrupt fluctuations in the isotopic composition are detected throughout the entire dataset, especially during the freeze up phase (Oct-Nov) and the transition from frozen conditions to summer melt (Apr-Jun). Preliminary comparison of the Polarstern data with measurements from different Arctic stations indicates a strong influence of sea ice coverage on the isotopic signal. For an in-depth understanding of the observed isotopic changes, we quantitatively compare the measured isotopic signatures with model results from an ECHAM6 atmosphere ... |
format |
Conference Object |
author |
Brunello, Camilla F. Meyer, Hanno Mellat, Moein Werner, Martin |
spellingShingle |
Brunello, Camilla F. Meyer, Hanno Mellat, Moein Werner, Martin Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean |
author_facet |
Brunello, Camilla F. Meyer, Hanno Mellat, Moein Werner, Martin |
author_sort |
Brunello, Camilla F. |
title |
Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean |
title_short |
Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean |
title_full |
Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean |
title_fullStr |
Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean |
title_full_unstemmed |
Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean |
title_sort |
atmospheric water vapour isotopes in the arctic at the interface with sea ice and open ocean |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/56275/ https://epic.awi.de/id/eprint/56275/1/Brunello_IsotopeWorkshop_2021_poster_final.pdf https://hdl.handle.net/10013/epic.be5672bb-3714-452d-aa38-20f934e55bdb |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
EPIC3Water Isotopes: From Weather to Climate, Geophysical Institute, UiB, 2021-11-17-2021-11-19 |
op_relation |
https://epic.awi.de/id/eprint/56275/1/Brunello_IsotopeWorkshop_2021_poster_final.pdf Brunello, C. F. orcid:0000-0002-4206-5852 , Meyer, H. orcid:0000-0003-4129-4706 , Mellat, M. orcid:0000-0001-7262-9906 and Werner, M. orcid:0000-0002-6473-0243 (2021) Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean , Water Isotopes: From Weather to Climate, Geophysical Institute, UiB, 17 November 2021 - 19 November 2021 . hdl:10013/epic.be5672bb-3714-452d-aa38-20f934e55bdb |
_version_ |
1810293499800584192 |