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A climatological study of polar stratospheric clouds (1989-1997) from LIDAR measurements over Dumont d’Urville (Antarctica).

Santacesaria, Vincenzo and Mackenzie, A. Robert and Stefanutti, Leopoldo (2001) A climatological study of polar stratospheric clouds (1989-1997) from LIDAR measurements over Dumont d’Urville (Antarctica). Tellus Series B: Chemical and Physical Meteorology, 53 (3). pp. 306-321. ISSN 0280-6509

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Abstract

Backscatter lidar data from the French Antarctic base in Dumont d'Urville (66.40°S, 140.01°E), including aerosol background and observations of polar stratospheric clouds (PSCs), have been collected since 1989. In the present work we present a climatological study of PSCs, using a data base consisting of almost 90 observations. The seasonal evolution of PSCs, their optical classification, and their relationship with the observation temperature were studied. The first PSC was observed on day number 175 (15 June) and the last on day number 260 (7 September). The characteristic mid‐cloud altitude decreases through the season at a rate of 2.5 km/month. Type Ia, Ib, and II PSCs — identified by their optical properties — have been observed. External mixtures of these types have also been observed. These observations have been related to the local temperature measured by radiosondes. The relationship between PSC type and the period of the winter season was also investigated. Mixed (solid and liquid) type I clouds are mostly observed at the beginning of the winter. Type II clouds are observed only during the coldest period around midwinter, although temperatures below the frost point begin earlier and persist longer than this. Type Ia, solid‐particle, clouds are observed mostly at the end of the winter.

Item Type: Article
Journal or Publication Title: Tellus Series B: Chemical and Physical Meteorology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21577
Deposited By: ep_ss_importer
Deposited On: 22 Jan 2009 09:30
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:49
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21577

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