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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ftdoajarticles:oai:doaj.org/article:eeb49eb07fdc43249b80f5b938ca0506 2023-05-15T15:00:41+02:00 Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River Delta, Siberia J.-L. Bonne H. Meyer M. Behrens J. Boike S. Kipfstuhl B. Rabe T. Schmidt L. Schönicke H. C. Steen-Larsen M. Werner 2020-09-01T00:00:00Z https://doi.org/10.5194/acp-20-10493-2020 https://doaj.org/article/eeb49eb07fdc43249b80f5b938ca0506 EN eng Copernicus Publications https://acp.copernicus.org/articles/20/10493/2020/acp-20-10493-2020.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-20-10493-2020 1680-7316 1680-7324 https://doaj.org/article/eeb49eb07fdc43249b80f5b938ca0506 Atmospheric Chemistry and Physics, Vol 20, Pp 10493-10511 (2020) Physics QC1-999 Chemistry QD1-999 article 2020 ftdoajarticles https://doi.org/10.5194/acp-20-10493-2020 2022-12-30T22:56:07Z 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. Article in Journal/Newspaper Arctic Climate change lena delta lena river Siberia Directory of Open Access Journals: DOAJ Articles Arctic Atmospheric Chemistry and Physics 20 17 10493 10511 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 J.-L. Bonne H. Meyer M. Behrens J. Boike S. Kipfstuhl B. Rabe T. Schmidt L. Schönicke H. C. Steen-Larsen M. Werner Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River Delta, Siberia |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
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. |
format |
Article in Journal/Newspaper |
author |
J.-L. Bonne H. Meyer M. Behrens J. Boike S. Kipfstuhl B. Rabe T. Schmidt L. Schönicke H. C. Steen-Larsen M. Werner |
author_facet |
J.-L. Bonne H. Meyer M. Behrens J. Boike S. Kipfstuhl B. Rabe T. Schmidt L. Schönicke H. C. Steen-Larsen M. Werner |
author_sort |
J.-L. Bonne |
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://doi.org/10.5194/acp-20-10493-2020 https://doaj.org/article/eeb49eb07fdc43249b80f5b938ca0506 |
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, Vol 20, Pp 10493-10511 (2020) |
op_relation |
https://acp.copernicus.org/articles/20/10493/2020/acp-20-10493-2020.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-20-10493-2020 1680-7316 1680-7324 https://doaj.org/article/eeb49eb07fdc43249b80f5b938ca0506 |
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 |
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