Variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered Arctic Ocean
Due to their potential to either warm or cool the surface, liquid-phase clouds and their interaction with the ice-free and sea-ice-covered ocean largely determine the energy budget and surface temperature in the Arctic. Here, we use airborne measurements of solar spectral cloud reflectivity obtained...
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ftcopernicus:oai:publications.copernicus.org:acpd108543 2023-05-15T14:50:05+02:00 Variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered Arctic Ocean Klingebiel, Marcus Ehrlich, André Ruiz-Donoso, Elena Risse, Nils Schirmacher, Imke Jäkel, Evelyn Schäfer, Michael Wolf, Kevin Mech, Mario Moser, Manuel Voigt, Christiane Wendisch, Manfred 2023-01-06 application/pdf https://doi.org/10.5194/acp-2022-848 https://acp.copernicus.org/preprints/acp-2022-848/ eng eng doi:10.5194/acp-2022-848 https://acp.copernicus.org/preprints/acp-2022-848/ eISSN: 1680-7324 Text 2023 ftcopernicus https://doi.org/10.5194/acp-2022-848 2023-01-09T17:22:42Z Due to their potential to either warm or cool the surface, liquid-phase clouds and their interaction with the ice-free and sea-ice-covered ocean largely determine the energy budget and surface temperature in the Arctic. Here, we use airborne measurements of solar spectral cloud reflectivity obtained during the ACLOUD campaign in summer 2017 and the AFLUX campaign in spring 2019 in the vicinity of Svalbard to retrieve microphysical properties of liquid-phase clouds. The retrieval was tailored to provide consistent results over sea-ice and open ocean surfaces. Clouds including ice crystals that significantly bias the retrieval results were filtered from the analysis. A comparison with in-situ measurements shows a good agreement with the retrieved effective radii and an overestimation of the liquid water path and a reduced agreement for boundary-layer clouds with varying fractions of ice water content. Considering these limitations, retrieved microphysical properties of clouds observed over ice-free ocean and sea-ice in spring and early summer in the Arctic are compared. In early summer, the liquid-phase clouds have a larger median effective radius (9.5 µm), optical thickness (11.8) and liquid water path (72.3 g m -2 ) compared to spring conditions (8.7 µm, 8.3, 51.8 g m -2 , respectively). The results show larger cloud droplets over the ice-free Arctic Ocean compared to sea-ice in spring and early summer caused mainly by the temperature differences of the surfaces and related convection processes. Due to their larger droplet sizes the liquid clouds over the ice-free ocean have slightly reduced optical thicknesses and lower liquid water contents compared to the sea-ice surface conditions. The comprehensive data set on microphysical properties of Arctic liquid-phase clouds is publicly available and could, e.g., help to constrain models or be used to investigate effects of liquid-phase clouds on the radiation budget. Text Arctic Arctic Ocean Sea ice Svalbard Copernicus Publications: E-Journals Arctic Arctic Ocean Svalbard |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Due to their potential to either warm or cool the surface, liquid-phase clouds and their interaction with the ice-free and sea-ice-covered ocean largely determine the energy budget and surface temperature in the Arctic. Here, we use airborne measurements of solar spectral cloud reflectivity obtained during the ACLOUD campaign in summer 2017 and the AFLUX campaign in spring 2019 in the vicinity of Svalbard to retrieve microphysical properties of liquid-phase clouds. The retrieval was tailored to provide consistent results over sea-ice and open ocean surfaces. Clouds including ice crystals that significantly bias the retrieval results were filtered from the analysis. A comparison with in-situ measurements shows a good agreement with the retrieved effective radii and an overestimation of the liquid water path and a reduced agreement for boundary-layer clouds with varying fractions of ice water content. Considering these limitations, retrieved microphysical properties of clouds observed over ice-free ocean and sea-ice in spring and early summer in the Arctic are compared. In early summer, the liquid-phase clouds have a larger median effective radius (9.5 µm), optical thickness (11.8) and liquid water path (72.3 g m -2 ) compared to spring conditions (8.7 µm, 8.3, 51.8 g m -2 , respectively). The results show larger cloud droplets over the ice-free Arctic Ocean compared to sea-ice in spring and early summer caused mainly by the temperature differences of the surfaces and related convection processes. Due to their larger droplet sizes the liquid clouds over the ice-free ocean have slightly reduced optical thicknesses and lower liquid water contents compared to the sea-ice surface conditions. The comprehensive data set on microphysical properties of Arctic liquid-phase clouds is publicly available and could, e.g., help to constrain models or be used to investigate effects of liquid-phase clouds on the radiation budget. |
format |
Text |
author |
Klingebiel, Marcus Ehrlich, André Ruiz-Donoso, Elena Risse, Nils Schirmacher, Imke Jäkel, Evelyn Schäfer, Michael Wolf, Kevin Mech, Mario Moser, Manuel Voigt, Christiane Wendisch, Manfred |
spellingShingle |
Klingebiel, Marcus Ehrlich, André Ruiz-Donoso, Elena Risse, Nils Schirmacher, Imke Jäkel, Evelyn Schäfer, Michael Wolf, Kevin Mech, Mario Moser, Manuel Voigt, Christiane Wendisch, Manfred Variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered Arctic Ocean |
author_facet |
Klingebiel, Marcus Ehrlich, André Ruiz-Donoso, Elena Risse, Nils Schirmacher, Imke Jäkel, Evelyn Schäfer, Michael Wolf, Kevin Mech, Mario Moser, Manuel Voigt, Christiane Wendisch, Manfred |
author_sort |
Klingebiel, Marcus |
title |
Variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered Arctic Ocean |
title_short |
Variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered Arctic Ocean |
title_full |
Variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered Arctic Ocean |
title_fullStr |
Variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered Arctic Ocean |
title_full_unstemmed |
Variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered Arctic Ocean |
title_sort |
variability and properties of liquid-dominated clouds over the ice-free and sea-ice-covered arctic ocean |
publishDate |
2023 |
url |
https://doi.org/10.5194/acp-2022-848 https://acp.copernicus.org/preprints/acp-2022-848/ |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Ocean Sea ice Svalbard |
genre_facet |
Arctic Arctic Ocean Sea ice Svalbard |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-2022-848 https://acp.copernicus.org/preprints/acp-2022-848/ |
op_doi |
https://doi.org/10.5194/acp-2022-848 |
_version_ |
1766321163625037824 |