Sea‐salt aerosols over the north‐east Atlantic: Model simulations of the ACE‐2 Second Lagrangian experiment
Abstract A one‐dimensional ensemble‐average model is used in this study to simulate the North Atlantic regional Aerosol Characterisation Experiment (ACE‐2) Second Lagrangian experiment, where the same air mass was followed in the trade wind area over the north‐east Atlantic during July 1997. The air...
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crwiley:10.1256/qj.03.82 2024-06-23T07:55:16+00:00 Sea‐salt aerosols over the north‐east Atlantic: Model simulations of the ACE‐2 Second Lagrangian experiment Glantz, Paul Svensson, Gunilla Noone, Kevin J. Osborne, Simon R. 2004 http://dx.doi.org/10.1256/qj.03.82 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1256%2Fqj.03.82 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1256/qj.03.82 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 130, issue 601, page 2191-2215 ISSN 0035-9009 1477-870X journal-article 2004 crwiley https://doi.org/10.1256/qj.03.82 2024-06-11T04:45:48Z Abstract A one‐dimensional ensemble‐average model is used in this study to simulate the North Atlantic regional Aerosol Characterisation Experiment (ACE‐2) Second Lagrangian experiment, where the same air mass was followed in the trade wind area over the north‐east Atlantic during July 1997. The air mass was affected by increased sea surface temperatures and decreased synoptic‐scale subsidence on its way southward towards the Canary Islands. This caused the marine boundary layer (MBL) to grow from a shallow layer capped by a stratocumulus deck to a decoupled layer with cumulus clouds forming below the stratocumulus layer. Several of the meteorological parameters obtained during a control run show reasonable agreement with observations. The model essentially captures the MBL growth, but the increase of the cloud top height occurs more slowly in the simulation than is indicated by the in situ observations. The sea surface temperature increase seems to be the most important factor for the deepening of the MBL. The model simulates relatively steep vertical gradients in the sea‐salt mass concentrations both in the shallow and deeper MBLs, consistent with in situ measurements. Furthermore, the sea‐salt particle mass concentrations estimated by the model for most of the altitude levels in the MBL are within 22% of the observed concentrations of sea‐salt‐related ions. Turbulent mixing by wind shear did not create well‐mixed MBLs based on the sea‐salt mass concentrations. Vertical gradients in sea‐salt number and mass concentrations suggest a reduced influence of sea‐salt particles as cloud condensation nuclei. © Royal Meteorological Society, 2004. S. R. Obsborne's contribution is Crown copyright. Article in Journal/Newspaper North Atlantic North East Atlantic Wiley Online Library Quarterly Journal of the Royal Meteorological Society 130 601 2191 2215 |
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English |
description |
Abstract A one‐dimensional ensemble‐average model is used in this study to simulate the North Atlantic regional Aerosol Characterisation Experiment (ACE‐2) Second Lagrangian experiment, where the same air mass was followed in the trade wind area over the north‐east Atlantic during July 1997. The air mass was affected by increased sea surface temperatures and decreased synoptic‐scale subsidence on its way southward towards the Canary Islands. This caused the marine boundary layer (MBL) to grow from a shallow layer capped by a stratocumulus deck to a decoupled layer with cumulus clouds forming below the stratocumulus layer. Several of the meteorological parameters obtained during a control run show reasonable agreement with observations. The model essentially captures the MBL growth, but the increase of the cloud top height occurs more slowly in the simulation than is indicated by the in situ observations. The sea surface temperature increase seems to be the most important factor for the deepening of the MBL. The model simulates relatively steep vertical gradients in the sea‐salt mass concentrations both in the shallow and deeper MBLs, consistent with in situ measurements. Furthermore, the sea‐salt particle mass concentrations estimated by the model for most of the altitude levels in the MBL are within 22% of the observed concentrations of sea‐salt‐related ions. Turbulent mixing by wind shear did not create well‐mixed MBLs based on the sea‐salt mass concentrations. Vertical gradients in sea‐salt number and mass concentrations suggest a reduced influence of sea‐salt particles as cloud condensation nuclei. © Royal Meteorological Society, 2004. S. R. Obsborne's contribution is Crown copyright. |
format |
Article in Journal/Newspaper |
author |
Glantz, Paul Svensson, Gunilla Noone, Kevin J. Osborne, Simon R. |
spellingShingle |
Glantz, Paul Svensson, Gunilla Noone, Kevin J. Osborne, Simon R. Sea‐salt aerosols over the north‐east Atlantic: Model simulations of the ACE‐2 Second Lagrangian experiment |
author_facet |
Glantz, Paul Svensson, Gunilla Noone, Kevin J. Osborne, Simon R. |
author_sort |
Glantz, Paul |
title |
Sea‐salt aerosols over the north‐east Atlantic: Model simulations of the ACE‐2 Second Lagrangian experiment |
title_short |
Sea‐salt aerosols over the north‐east Atlantic: Model simulations of the ACE‐2 Second Lagrangian experiment |
title_full |
Sea‐salt aerosols over the north‐east Atlantic: Model simulations of the ACE‐2 Second Lagrangian experiment |
title_fullStr |
Sea‐salt aerosols over the north‐east Atlantic: Model simulations of the ACE‐2 Second Lagrangian experiment |
title_full_unstemmed |
Sea‐salt aerosols over the north‐east Atlantic: Model simulations of the ACE‐2 Second Lagrangian experiment |
title_sort |
sea‐salt aerosols over the north‐east atlantic: model simulations of the ace‐2 second lagrangian experiment |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1256/qj.03.82 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1256%2Fqj.03.82 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1256/qj.03.82 |
genre |
North Atlantic North East Atlantic |
genre_facet |
North Atlantic North East Atlantic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 130, issue 601, page 2191-2215 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1256/qj.03.82 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
130 |
container_issue |
601 |
container_start_page |
2191 |
op_container_end_page |
2215 |
_version_ |
1802647775992610816 |