Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions
Boundary layer moisture variability at the Eastern North Atlantic (ENA) site during marine conditions is examined at monthly and daily timescales using 5 years of ground-based observations and output from the European Center for Medium range Weather Forecast (ECMWF) reanalysis model. The annual cycl...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00065507 2023-05-15T17:31:24+02:00 Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions Cadeddu, Maria P. Ghate, Virendra P. Turner, David D. Surleta, Thomas E. 2023-03 electronic https://doi.org/10.5194/acp-23-3453-2023 https://noa.gwlb.de/receive/cop_mods_00065507 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064027/acp-23-3453-2023.pdf https://acp.copernicus.org/articles/23/3453/2023/acp-23-3453-2023.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-23-3453-2023 https://noa.gwlb.de/receive/cop_mods_00065507 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064027/acp-23-3453-2023.pdf https://acp.copernicus.org/articles/23/3453/2023/acp-23-3453-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/acp-23-3453-2023 2023-03-26T23:15:38Z Boundary layer moisture variability at the Eastern North Atlantic (ENA) site during marine conditions is examined at monthly and daily timescales using 5 years of ground-based observations and output from the European Center for Medium range Weather Forecast (ECMWF) reanalysis model. The annual cycle of the mixed-layer total water budgets is presented to estimate the relative contribution of large-scale advection, local moisture tendency, entrainment, and precipitation to balance the moistening due to surface latent heat flux on monthly timescales. When marine conditions prevail, advection of colder and dry air from the north acts as an important moisture sink (∼ 50 % of the overall budget) during fall and winter driving the seasonality of the budget. Entrainment and precipitation contribute to the drying of the boundary layer (∼ 25 % and ∼ 15 % respectively), and the local change in moisture contributes to a small residual part. On a daily temporal scale, moist and dry mesoscale columns of vapor (∼ 10 km) are analyzed during 10 selected days of precipitating stratocumulus clouds. Adjacent moist and dry columns present distinct mesoscale features that are strongly correlated with clouds and precipitation. Dry columns adjacent to moist columns have more frequent and stronger downdrafts immediately below the cloud base. Moist columns have more frequent updrafts, stronger cloud-top cooling, and higher liquid water path and precipitation compared to the dry columns. This study highlights the complex interaction between large-scale and local processes controlling the boundary layer moisture and the importance of spatial distribution of vapor to support convection and precipitation. Article in Journal/Newspaper North Atlantic Niedersächsisches Online-Archiv NOA Atmospheric Chemistry and Physics 23 6 3453 3470 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Cadeddu, Maria P. Ghate, Virendra P. Turner, David D. Surleta, Thomas E. Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions |
topic_facet |
article Verlagsveröffentlichung |
description |
Boundary layer moisture variability at the Eastern North Atlantic (ENA) site during marine conditions is examined at monthly and daily timescales using 5 years of ground-based observations and output from the European Center for Medium range Weather Forecast (ECMWF) reanalysis model. The annual cycle of the mixed-layer total water budgets is presented to estimate the relative contribution of large-scale advection, local moisture tendency, entrainment, and precipitation to balance the moistening due to surface latent heat flux on monthly timescales. When marine conditions prevail, advection of colder and dry air from the north acts as an important moisture sink (∼ 50 % of the overall budget) during fall and winter driving the seasonality of the budget. Entrainment and precipitation contribute to the drying of the boundary layer (∼ 25 % and ∼ 15 % respectively), and the local change in moisture contributes to a small residual part. On a daily temporal scale, moist and dry mesoscale columns of vapor (∼ 10 km) are analyzed during 10 selected days of precipitating stratocumulus clouds. Adjacent moist and dry columns present distinct mesoscale features that are strongly correlated with clouds and precipitation. Dry columns adjacent to moist columns have more frequent and stronger downdrafts immediately below the cloud base. Moist columns have more frequent updrafts, stronger cloud-top cooling, and higher liquid water path and precipitation compared to the dry columns. This study highlights the complex interaction between large-scale and local processes controlling the boundary layer moisture and the importance of spatial distribution of vapor to support convection and precipitation. |
format |
Article in Journal/Newspaper |
author |
Cadeddu, Maria P. Ghate, Virendra P. Turner, David D. Surleta, Thomas E. |
author_facet |
Cadeddu, Maria P. Ghate, Virendra P. Turner, David D. Surleta, Thomas E. |
author_sort |
Cadeddu, Maria P. |
title |
Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions |
title_short |
Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions |
title_full |
Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions |
title_fullStr |
Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions |
title_full_unstemmed |
Boundary layer moisture variability at the Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observatory during marine conditions |
title_sort |
boundary layer moisture variability at the atmospheric radiation measurement (arm) eastern north atlantic observatory during marine conditions |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/acp-23-3453-2023 https://noa.gwlb.de/receive/cop_mods_00065507 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064027/acp-23-3453-2023.pdf https://acp.copernicus.org/articles/23/3453/2023/acp-23-3453-2023.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-23-3453-2023 https://noa.gwlb.de/receive/cop_mods_00065507 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064027/acp-23-3453-2023.pdf https://acp.copernicus.org/articles/23/3453/2023/acp-23-3453-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-23-3453-2023 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
23 |
container_issue |
6 |
container_start_page |
3453 |
op_container_end_page |
3470 |
_version_ |
1766128931995385856 |