Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River delta, Siberia
In the context of the Arctic amplification of climate change affecting the regional atmospheric hydrological cycle, it is crucial to characterize the present-day moisture sources of the Arctic. The isotopic composition is an important tool to enhance our understanding of the drivers of the hydrologi...
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ftunivbergen:oai:bora.uib.no:11250/2766166 2023-05-15T15:00:58+02:00 Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River delta, Siberia Bonne, Jean-Louis Meyer, Hanno Behrens, Melanie Boike, Julia Kipfstuhl, Sepp Rabe, Benjamin Schmidt, Toni Schönicke, Lutz Steen-Larsen, Hans Christian Werner, Martin 2020 application/pdf https://hdl.handle.net/11250/2766166 https://doi.org/10.5194/acp-20-10493-2020 eng eng Copernicus Publications urn:issn:1680-7316 https://hdl.handle.net/11250/2766166 https://doi.org/10.5194/acp-20-10493-2020 cristin:1840691 Atmospheric Chemistry and Physics. 2020, 20 (17), 10493-10511. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2020 The Authors Atmospheric Chemistry and Physics 10493-10511 20 17 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.5194/acp-20-10493-2020 2023-03-14T17:39:54Z In the context of the Arctic amplification of climate change affecting the regional atmospheric hydrological cycle, it is crucial to characterize the present-day moisture sources of the Arctic. The isotopic composition is an important tool to enhance our understanding of the drivers of the hydrological cycle due to the different molecular characteristics of water stable isotopes during phase change. This study introduces 2 years of continuous in situ water vapour and precipitation isotopic observations conducted since July 2015 in the eastern Siberian Lena delta at the research station on Samoylov Island. The vapour isotopic signals are dominated by variations at seasonal and synoptic timescales. Diurnal variations of the vapour isotopic signals are masked by synoptic variations, indicating low variations of the amplitude of local sources at the diurnal scale in winter, summer and autumn. Low-amplitude diurnal variations in spring may indicate exchange of moisture between the atmosphere and the snow-covered surface. Moisture source diagnostics based on semi-Lagrangian backward trajectories reveal that different air mass origins have contrasting contributions to the moisture budget of the Lena delta region. At the seasonal scale, the distance from the net moisture sources to the arrival site strongly varies. During the coldest months, no contribution from local secondary evaporation is observed. Variations of the vapour isotopic composition during the cold season on the synoptic timescale are strongly related to moisture source regions and variations in atmospheric transport: warm and isotopically enriched moist air is linked to fast transport from the Atlantic sector, while dry and cold air with isotopically depleted moisture is generally associated with air masses moving slowly over northern Eurasia. publishedVersion Article in Journal/Newspaper Arctic Climate change lena delta lena river Siberia University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Atmospheric Chemistry and Physics 20 17 10493 10511 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
In the context of the Arctic amplification of climate change affecting the regional atmospheric hydrological cycle, it is crucial to characterize the present-day moisture sources of the Arctic. The isotopic composition is an important tool to enhance our understanding of the drivers of the hydrological cycle due to the different molecular characteristics of water stable isotopes during phase change. This study introduces 2 years of continuous in situ water vapour and precipitation isotopic observations conducted since July 2015 in the eastern Siberian Lena delta at the research station on Samoylov Island. The vapour isotopic signals are dominated by variations at seasonal and synoptic timescales. Diurnal variations of the vapour isotopic signals are masked by synoptic variations, indicating low variations of the amplitude of local sources at the diurnal scale in winter, summer and autumn. Low-amplitude diurnal variations in spring may indicate exchange of moisture between the atmosphere and the snow-covered surface. Moisture source diagnostics based on semi-Lagrangian backward trajectories reveal that different air mass origins have contrasting contributions to the moisture budget of the Lena delta region. At the seasonal scale, the distance from the net moisture sources to the arrival site strongly varies. During the coldest months, no contribution from local secondary evaporation is observed. Variations of the vapour isotopic composition during the cold season on the synoptic timescale are strongly related to moisture source regions and variations in atmospheric transport: warm and isotopically enriched moist air is linked to fast transport from the Atlantic sector, while dry and cold air with isotopically depleted moisture is generally associated with air masses moving slowly over northern Eurasia. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Bonne, Jean-Louis Meyer, Hanno Behrens, Melanie Boike, Julia Kipfstuhl, Sepp Rabe, Benjamin Schmidt, Toni Schönicke, Lutz Steen-Larsen, Hans Christian Werner, Martin |
spellingShingle |
Bonne, Jean-Louis Meyer, Hanno Behrens, Melanie Boike, Julia Kipfstuhl, Sepp Rabe, Benjamin Schmidt, Toni Schönicke, Lutz Steen-Larsen, Hans Christian Werner, Martin Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River delta, Siberia |
author_facet |
Bonne, Jean-Louis Meyer, Hanno Behrens, Melanie Boike, Julia Kipfstuhl, Sepp Rabe, Benjamin Schmidt, Toni Schönicke, Lutz Steen-Larsen, Hans Christian Werner, Martin |
author_sort |
Bonne, Jean-Louis |
title |
Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River delta, Siberia |
title_short |
Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River delta, Siberia |
title_full |
Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River delta, Siberia |
title_fullStr |
Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River delta, Siberia |
title_full_unstemmed |
Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River delta, Siberia |
title_sort |
moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the lena river delta, siberia |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2766166 https://doi.org/10.5194/acp-20-10493-2020 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change lena delta lena river Siberia |
genre_facet |
Arctic Climate change lena delta lena river Siberia |
op_source |
Atmospheric Chemistry and Physics 10493-10511 20 17 |
op_relation |
urn:issn:1680-7316 https://hdl.handle.net/11250/2766166 https://doi.org/10.5194/acp-20-10493-2020 cristin:1840691 Atmospheric Chemistry and Physics. 2020, 20 (17), 10493-10511. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2020 The Authors |
op_doi |
https://doi.org/10.5194/acp-20-10493-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
17 |
container_start_page |
10493 |
op_container_end_page |
10511 |
_version_ |
1766333014124527616 |