Cloud Condensation Nuclei and Ice-Nucleating Particles over the Southern Ocean: Abundance and Properties during the Antarctic Circum-navigation Expedition
Aerosol particles acting as cloud condensation nuclei (CCN) or ice nucleating parti- cles (INP) play a major role in the formation and glaciation of clouds. Thereby they exert a strong impact on the radiation budget of the Earth. Data on abundance and properties of both particle types are sparse, es...
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ftunivleipzig:oai:qucosa:de:qucosa:85949 2023-09-05T13:13:32+02:00 Cloud Condensation Nuclei and Ice-Nucleating Particles over the Southern Ocean: Abundance and Properties during the Antarctic Circum-navigation Expedition Tatzelt, Christian Kalesse-Los, Heike Pöhlker, Mira Wu, Zhijun Stratmann, Frank Henning, Silvia Universität Leipzig 2022-07-05 https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-859492 https://ul.qucosa.de/id/qucosa%3A85949 https://ul.qucosa.de/api/qucosa%3A85949/attachment/ATT-0/ eng eng 10.5194/acp-22-9721-2022 10.5281/zenodo.2636764 10.5281/zenodo.2636776 10.5281/zenodo.3922146 urn:nbn:de:bsz:15-qucosa2-859492 https://ul.qucosa.de/id/qucosa%3A85949 https://ul.qucosa.de/api/qucosa%3A85949/attachment/ATT-0/ info:eu-repo/semantics/openAccess Souther Ocean clouds aerosol particles CCN INP Südlicher Ozean Wolken Aerosolpartikel Wolkenkondensationskeime Eiskeime info:eu-repo/classification/ddc/551 ddc:551 info:eu-repo/semantics/acceptedVersion doc-type:doctoralThesis info:eu-repo/semantics/doctoralThesis doc-type:Text 2022 ftunivleipzig 2023-08-11T13:58:58Z Aerosol particles acting as cloud condensation nuclei (CCN) or ice nucleating parti- cles (INP) play a major role in the formation and glaciation of clouds. Thereby they exert a strong impact on the radiation budget of the Earth. Data on abundance and properties of both particle types are sparse, especially for remote areas of the world, such as the Southern Ocean (SO). In this work, unique results from ship-borne aerosol-particle-related in situ measurements and filter sampling in the summertime SO region are presented. An overview of CCN and INP number concentrations on the Southern Ocean is provided and, using additional analyses on particle chemical composition and air-mass origin, insights regarding possible CCN and INP sources and origins are presented, with the help of a correlation analysis. CCN number concentrations spanned 2 orders of magnitude, e.g. for a supersaturation of 0.3 % values ranged roughly from 3 to 590 cm⁻³. CCN showed variable contributions of organic and inorganic material. No distinct size-dependence of the CCN hygroscopicity parameter was apparent, indicating homogeneous composition across sizes (critical dry diameter on average between 30 nm and 110 nm). The relative contribution of sea spray aerosol (SSA) to the CCN number concentration was on average small (below 35 %). Ambient INP number concentrations were measured in the temperature range from −4 to −27 °C using an immersion freezing method. Concentrations spanned up to 3 orders of magnitude, e.g. at −16 °C from 0.2 to 100 m⁻³. Elevated values (above 10 m⁻³ at −16 °C) were measured when the research vessel was in the vicinity of land (excluding Antarctica). Lower, more constant concentrations were measured on the open ocean. This, along with results of backward-trajectory analyses, hints towards terrestrial and/or coastal INP sources being dominant close to ice-free (non-Antarctic) land. In pristine marine areas INP may originate from both oceanic sources and/or long range transport. A correlation analysis yielded strong ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica Southern Ocean Universität Leipzig: Qucosa Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Universität Leipzig: Qucosa |
op_collection_id |
ftunivleipzig |
language |
English |
topic |
Souther Ocean clouds aerosol particles CCN INP Südlicher Ozean Wolken Aerosolpartikel Wolkenkondensationskeime Eiskeime info:eu-repo/classification/ddc/551 ddc:551 |
spellingShingle |
Souther Ocean clouds aerosol particles CCN INP Südlicher Ozean Wolken Aerosolpartikel Wolkenkondensationskeime Eiskeime info:eu-repo/classification/ddc/551 ddc:551 Tatzelt, Christian Cloud Condensation Nuclei and Ice-Nucleating Particles over the Southern Ocean: Abundance and Properties during the Antarctic Circum-navigation Expedition |
topic_facet |
Souther Ocean clouds aerosol particles CCN INP Südlicher Ozean Wolken Aerosolpartikel Wolkenkondensationskeime Eiskeime info:eu-repo/classification/ddc/551 ddc:551 |
description |
Aerosol particles acting as cloud condensation nuclei (CCN) or ice nucleating parti- cles (INP) play a major role in the formation and glaciation of clouds. Thereby they exert a strong impact on the radiation budget of the Earth. Data on abundance and properties of both particle types are sparse, especially for remote areas of the world, such as the Southern Ocean (SO). In this work, unique results from ship-borne aerosol-particle-related in situ measurements and filter sampling in the summertime SO region are presented. An overview of CCN and INP number concentrations on the Southern Ocean is provided and, using additional analyses on particle chemical composition and air-mass origin, insights regarding possible CCN and INP sources and origins are presented, with the help of a correlation analysis. CCN number concentrations spanned 2 orders of magnitude, e.g. for a supersaturation of 0.3 % values ranged roughly from 3 to 590 cm⁻³. CCN showed variable contributions of organic and inorganic material. No distinct size-dependence of the CCN hygroscopicity parameter was apparent, indicating homogeneous composition across sizes (critical dry diameter on average between 30 nm and 110 nm). The relative contribution of sea spray aerosol (SSA) to the CCN number concentration was on average small (below 35 %). Ambient INP number concentrations were measured in the temperature range from −4 to −27 °C using an immersion freezing method. Concentrations spanned up to 3 orders of magnitude, e.g. at −16 °C from 0.2 to 100 m⁻³. Elevated values (above 10 m⁻³ at −16 °C) were measured when the research vessel was in the vicinity of land (excluding Antarctica). Lower, more constant concentrations were measured on the open ocean. This, along with results of backward-trajectory analyses, hints towards terrestrial and/or coastal INP sources being dominant close to ice-free (non-Antarctic) land. In pristine marine areas INP may originate from both oceanic sources and/or long range transport. A correlation analysis yielded strong ... |
author2 |
Kalesse-Los, Heike Pöhlker, Mira Wu, Zhijun Stratmann, Frank Henning, Silvia Universität Leipzig |
format |
Doctoral or Postdoctoral Thesis |
author |
Tatzelt, Christian |
author_facet |
Tatzelt, Christian |
author_sort |
Tatzelt, Christian |
title |
Cloud Condensation Nuclei and Ice-Nucleating Particles over the Southern Ocean: Abundance and Properties during the Antarctic Circum-navigation Expedition |
title_short |
Cloud Condensation Nuclei and Ice-Nucleating Particles over the Southern Ocean: Abundance and Properties during the Antarctic Circum-navigation Expedition |
title_full |
Cloud Condensation Nuclei and Ice-Nucleating Particles over the Southern Ocean: Abundance and Properties during the Antarctic Circum-navigation Expedition |
title_fullStr |
Cloud Condensation Nuclei and Ice-Nucleating Particles over the Southern Ocean: Abundance and Properties during the Antarctic Circum-navigation Expedition |
title_full_unstemmed |
Cloud Condensation Nuclei and Ice-Nucleating Particles over the Southern Ocean: Abundance and Properties during the Antarctic Circum-navigation Expedition |
title_sort |
cloud condensation nuclei and ice-nucleating particles over the southern ocean: abundance and properties during the antarctic circum-navigation expedition |
publishDate |
2022 |
url |
https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-859492 https://ul.qucosa.de/id/qucosa%3A85949 https://ul.qucosa.de/api/qucosa%3A85949/attachment/ATT-0/ |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
10.5194/acp-22-9721-2022 10.5281/zenodo.2636764 10.5281/zenodo.2636776 10.5281/zenodo.3922146 urn:nbn:de:bsz:15-qucosa2-859492 https://ul.qucosa.de/id/qucosa%3A85949 https://ul.qucosa.de/api/qucosa%3A85949/attachment/ATT-0/ |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1776204771788587008 |