Measurement report: Cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations
Long-range transport of biogenic emissions from the coast of Antarctica, precipitation scavenging, and cloud processing are the main processes that influence the observed variability in Southern Ocean (SO) marine boundary layer (MBL) condensation nuclei (CN) and cloud condensation nuclei (CCN) conce...
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ftncar:oai:drupal-site.org:articles_24164 2024-04-14T08:02:22+00:00 Measurement report: Cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations Sanchez, Kevin J. (author) Roberts, Gregory C. (author) Saliba, Georges (author) Russell, Lynn M. (author) Twohy, Cynthia (author) Reeves, Michael J. (author) Humphries, Ruhi S. (author) Keywood, Melita D. (author) Ward, Jason P. (author) McRobert, Ian M. (author) 2021-03-05 https://doi.org/10.5194/acp-21-3427-2021 en eng Atmospheric Chemistry and Physics--Atmos. Chem. Phys.--1680-7324 CAPRICORN2 - Atmospheric aerosol measurements from the RV Investigator voyage IN2018_V01--10.25919/2h1c-t753 ECMWF 0.1 Degree IFS Model Data. Version 1.0--10.26023/Z0M2-M6YK-XD12 SOCRATES: Low Rate (LRT - 1 sps) Navigation, State Parameter, and Microphysics Flight-Level Data. Version 1.3--10.5065/D6M32TM9 SOCRATES CCN measurements. Version 1.1--10.5065/D6Z036XB articles:24164 ark:/85065/d7vm4gmg doi:10.5194/acp-21-3427-2021 Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2021 ftncar https://doi.org/10.5194/acp-21-3427-2021 2024-03-21T18:00:26Z Long-range transport of biogenic emissions from the coast of Antarctica, precipitation scavenging, and cloud processing are the main processes that influence the observed variability in Southern Ocean (SO) marine boundary layer (MBL) condensation nuclei (CN) and cloud condensation nuclei (CCN) concentrations during the austral summer. Airborne particle measurements on the HIAPER GV from north-south transects between Hobart, Tasmania, and 62ffi S during the Southern Ocean Clouds, Radiation Aerosol Transport Experimental Study (SOCRATES) were separated into four regimes comprising combinations of high and low concentrations of CCN and CN. In 5 d HYSPLIT back trajectories, air parcels with elevated CCN concentrations were almost always shown to have crossed the Antarctic coast, a location with elevated phytoplankton emissions relative to the rest of the SO in the region south of Australia. The presence of high CCN concentrations was also consistent with high cloud fractions over their trajectory, suggesting there was substantial growth of biogenically formed particles through cloud processing. Cases with low cloud fraction, due to the presence of cumulus clouds, had high CN concentrations, consistent with previously reported new particle formation in cumulus outflow regions. Measurements associated with elevated precipitation during the previous 1.5 d of their trajectory had low CCN concentrations indicating CCN were effectively scavenged by precipitation. A coarse-mode fitting algorithm was used to determine the primary marine aerosol (PMA) contribution, which accounted for <20% of CCN (at 0.3% supersaturation) and cloud droplet number concentrations. Vertical profiles of CN and large particle concentrations ( Dp>0 :07 mu m) indicated that particle formation occurs more frequently above the MBL; however, the growth of recently formed particles typically occurs in the MBL, consistent with cloud processing and the condensation of volatile compound oxidation products. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic Austral Southern Ocean The Antarctic Atmospheric Chemistry and Physics 21 5 3427 3446 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Long-range transport of biogenic emissions from the coast of Antarctica, precipitation scavenging, and cloud processing are the main processes that influence the observed variability in Southern Ocean (SO) marine boundary layer (MBL) condensation nuclei (CN) and cloud condensation nuclei (CCN) concentrations during the austral summer. Airborne particle measurements on the HIAPER GV from north-south transects between Hobart, Tasmania, and 62ffi S during the Southern Ocean Clouds, Radiation Aerosol Transport Experimental Study (SOCRATES) were separated into four regimes comprising combinations of high and low concentrations of CCN and CN. In 5 d HYSPLIT back trajectories, air parcels with elevated CCN concentrations were almost always shown to have crossed the Antarctic coast, a location with elevated phytoplankton emissions relative to the rest of the SO in the region south of Australia. The presence of high CCN concentrations was also consistent with high cloud fractions over their trajectory, suggesting there was substantial growth of biogenically formed particles through cloud processing. Cases with low cloud fraction, due to the presence of cumulus clouds, had high CN concentrations, consistent with previously reported new particle formation in cumulus outflow regions. Measurements associated with elevated precipitation during the previous 1.5 d of their trajectory had low CCN concentrations indicating CCN were effectively scavenged by precipitation. A coarse-mode fitting algorithm was used to determine the primary marine aerosol (PMA) contribution, which accounted for <20% of CCN (at 0.3% supersaturation) and cloud droplet number concentrations. Vertical profiles of CN and large particle concentrations ( Dp>0 :07 mu m) indicated that particle formation occurs more frequently above the MBL; however, the growth of recently formed particles typically occurs in the MBL, consistent with cloud processing and the condensation of volatile compound oxidation products. |
author2 |
Sanchez, Kevin J. (author) Roberts, Gregory C. (author) Saliba, Georges (author) Russell, Lynn M. (author) Twohy, Cynthia (author) Reeves, Michael J. (author) Humphries, Ruhi S. (author) Keywood, Melita D. (author) Ward, Jason P. (author) McRobert, Ian M. (author) |
format |
Article in Journal/Newspaper |
title |
Measurement report: Cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations |
spellingShingle |
Measurement report: Cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations |
title_short |
Measurement report: Cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations |
title_full |
Measurement report: Cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations |
title_fullStr |
Measurement report: Cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations |
title_full_unstemmed |
Measurement report: Cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations |
title_sort |
measurement report: cloud processes and the transport of biological emissions affect southern ocean particle and cloud condensation nuclei concentrations |
publishDate |
2021 |
url |
https://doi.org/10.5194/acp-21-3427-2021 |
geographic |
Antarctic Austral Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
Atmospheric Chemistry and Physics--Atmos. Chem. Phys.--1680-7324 CAPRICORN2 - Atmospheric aerosol measurements from the RV Investigator voyage IN2018_V01--10.25919/2h1c-t753 ECMWF 0.1 Degree IFS Model Data. Version 1.0--10.26023/Z0M2-M6YK-XD12 SOCRATES: Low Rate (LRT - 1 sps) Navigation, State Parameter, and Microphysics Flight-Level Data. Version 1.3--10.5065/D6M32TM9 SOCRATES CCN measurements. Version 1.1--10.5065/D6Z036XB articles:24164 ark:/85065/d7vm4gmg doi:10.5194/acp-21-3427-2021 |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.5194/acp-21-3427-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
5 |
container_start_page |
3427 |
op_container_end_page |
3446 |
_version_ |
1796314517697724416 |