Unravelling the transport of moisture into the Saharan Air Layer using passive tracers and isotopes ...
The subtropical free troposphere plays a critical role in the radiative balance of the Earth. However, the complex interactions controlling moisture in this sensitive region and, in particular, the relative importance of long-range transport compared to lower-tropospheric mixing, remain unclear. Thi...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
ETH Zurich
2023
|
Subjects: | |
Online Access: | https://dx.doi.org/10.3929/ethz-b-000628392 http://hdl.handle.net/20.500.11850/628392 |
id |
ftdatacite:10.3929/ethz-b-000628392 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.3929/ethz-b-000628392 2024-04-28T08:29:59+00:00 Unravelling the transport of moisture into the Saharan Air Layer using passive tracers and isotopes ... Dahinden, Fabienne Aemisegger, Franziska Wernli, Heini Pfahl, Stephan 2023 application/pdf https://dx.doi.org/10.3929/ethz-b-000628392 http://hdl.handle.net/20.500.11850/628392 en eng ETH Zurich atmospheric humidity Moisture sources Moisture transport Saharan air layer Stable water isotopes Turbulent mixing article-journal Text ScholarlyArticle Journal Article 2023 ftdatacite https://doi.org/10.3929/ethz-b-000628392 2024-04-02T12:32:08Z The subtropical free troposphere plays a critical role in the radiative balance of the Earth. However, the complex interactions controlling moisture in this sensitive region and, in particular, the relative importance of long-range transport compared to lower-tropospheric mixing, remain unclear. This study uses the regional COSMO model equipped with stable water isotopes and passive water tracers to quantify the contributions of different evaporative sources to the moisture and its stable isotope signals in the eastern subtropical North Atlantic free troposphere. In summer, this region is characterized by two alternating large-scale circulation regimes: (i) dry, isotopically depleted air from the upper-level extratropics, and (ii) humid, enriched air advected from Northern Africa within the Saharan Air Layer (SAL) consisting of a mixture of moisture of diverse origin (tropical and extratropical North Atlantic, Africa, Europe, the Mediterranean). This diversity of moisture sources in regime (ii) arises from ... : Atmospheric Science Letters, 24 (12) ... Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
atmospheric humidity Moisture sources Moisture transport Saharan air layer Stable water isotopes Turbulent mixing |
spellingShingle |
atmospheric humidity Moisture sources Moisture transport Saharan air layer Stable water isotopes Turbulent mixing Dahinden, Fabienne Aemisegger, Franziska Wernli, Heini Pfahl, Stephan Unravelling the transport of moisture into the Saharan Air Layer using passive tracers and isotopes ... |
topic_facet |
atmospheric humidity Moisture sources Moisture transport Saharan air layer Stable water isotopes Turbulent mixing |
description |
The subtropical free troposphere plays a critical role in the radiative balance of the Earth. However, the complex interactions controlling moisture in this sensitive region and, in particular, the relative importance of long-range transport compared to lower-tropospheric mixing, remain unclear. This study uses the regional COSMO model equipped with stable water isotopes and passive water tracers to quantify the contributions of different evaporative sources to the moisture and its stable isotope signals in the eastern subtropical North Atlantic free troposphere. In summer, this region is characterized by two alternating large-scale circulation regimes: (i) dry, isotopically depleted air from the upper-level extratropics, and (ii) humid, enriched air advected from Northern Africa within the Saharan Air Layer (SAL) consisting of a mixture of moisture of diverse origin (tropical and extratropical North Atlantic, Africa, Europe, the Mediterranean). This diversity of moisture sources in regime (ii) arises from ... : Atmospheric Science Letters, 24 (12) ... |
format |
Article in Journal/Newspaper |
author |
Dahinden, Fabienne Aemisegger, Franziska Wernli, Heini Pfahl, Stephan |
author_facet |
Dahinden, Fabienne Aemisegger, Franziska Wernli, Heini Pfahl, Stephan |
author_sort |
Dahinden, Fabienne |
title |
Unravelling the transport of moisture into the Saharan Air Layer using passive tracers and isotopes ... |
title_short |
Unravelling the transport of moisture into the Saharan Air Layer using passive tracers and isotopes ... |
title_full |
Unravelling the transport of moisture into the Saharan Air Layer using passive tracers and isotopes ... |
title_fullStr |
Unravelling the transport of moisture into the Saharan Air Layer using passive tracers and isotopes ... |
title_full_unstemmed |
Unravelling the transport of moisture into the Saharan Air Layer using passive tracers and isotopes ... |
title_sort |
unravelling the transport of moisture into the saharan air layer using passive tracers and isotopes ... |
publisher |
ETH Zurich |
publishDate |
2023 |
url |
https://dx.doi.org/10.3929/ethz-b-000628392 http://hdl.handle.net/20.500.11850/628392 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_doi |
https://doi.org/10.3929/ethz-b-000628392 |
_version_ |
1797588009900572672 |