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Arctic cirrus particle size distributions and their parametrizations depending on the cloud origin
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.ORCID iD: 0000-0003-3701-7925
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology.ORCID iD: 0000-0002-0071-5415
Research Centre Jülich, Institute for Energy and Climate Research 7: Stratosphere (IEK-7) .ORCID iD: 0000-0002-2888-1722
Responsible organisation
2019 (English)Data set, Primary dataAlternative title
Parametriseringar av partikelegenskaper i arktiska cirrusmoln och dess beroende av molnens ursprung (Swedish)
Abstract [en]

Particle size distributions (PSDs) for cirrus clouds are important for both climate models and many remote sensing retrieval methods. It is necessary to parametrize PSDs for different cloud types.Arctic cirrus particle size distributions (PSD) are presented depending on the cloud origin, either in situ or liquid. The data set used originate from balloon-borne measurements above Kiruna (north of Sweden, 67.8N, 20.4E) during winter. The observed PSDs are represented by gamma functions. The gamma coefficients exhibit large differences with regard to cloud origin. Thus, two new PSD parametrizations for Arctic cirrus of in situ and liquid origin are presented. These functions for Arctic cirrus confirm established parametrizations for continental cirrus sorted by two particle size modes, but differ from others depending only on temperature. We suppose that the agreement between the parametrizations of the geographically different cirrus is because in situ and liquid origin cirrus also distinguish by particle size modes. Since cloud sorting by their origin is based on physical processes which are independent of geographical region, we further hypothesise that these cloud-type-based parametrizations might be generally valid for use in global models and satellite retrievals, given the distribution of the cloud types is known.The dataset consists primarily of measured particle size distributions (PSD).Then, coefficients of the fitted gamma functions are reported.Also, PSD data calculated from the new parametrizations at various temperatures are provided for typical conditions.

Abstract [sv]

Storleksfördelningar (PSD) av arktiska cirrusmoln är presenterade tillsammans med gamma-funktioner som bäst beskriver dessa PSD. Nya parametriseringar är framtagna av resultaten. Cirrusmätningar har genomförts i Kiruna, norra Sverige (67.8N, 20.4E).

Place, publisher, year
2019.
Keywords [en]
Particle Size Distribution, Atmospheric conditions, ice particles, parametrization, cirrus, arctic, cloud origin
Keywords [sv]
Particle Size Distribution, Atmosfäriska förhållanden, ispartiklar, parametrisering, fjädermoln, arktis, ursprungsmoln
National Category
Aerospace Engineering
Research subject
Atmospheric science; Atmospheric science
Identifiers
URN: urn:nbn:se:ltu:diva-77362DOI: 10.5878/qh1n-4466OAI: oai:DiVA.org:ltu-77362DiVA, id: diva2:1384982
Available from: 2020-01-13 Created: 2020-01-13 Last updated: 2020-01-13Bibliographically approved

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Kuhn, ThomasWolf, Veronika

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Kuhn, ThomasWolf, VeronikaKrämer, Martina
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Wolf, V., Kuhn, T., Milz, M., Völger, P., Krämer, M. & Rolf, C. (2018). Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI. Atmospheric Chemistry And Physics, 18(23), 17371-17386Kuhn, T. & Heymsfield, A. J. (2016). In Situ Balloon-Borne Ice Particle Imaging in High-Latitude Cirrus (ed.). Pure and Applied Geophysics, 173(9), 3065-3084Wolf, V., Kuhn, T. & Krämer, M. (2019). On the Dependence of Cirrus Parametrizations on the Cloud Origin. Geophysical Research Letters, 46(21), 12565-12571

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