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Unusual appearance of mother-of-pearl clouds above El Calafate, Argentina (50°21′S, 72°16′W)

Dörnbrack, Andreas and Kaifler, Bernd and Kaifler, Natalie and Rapp, Markus and Wildmann, Norman and Garhammar, Markus and Ohlmann, Klaus and Payne, James, M. and Sandercock, Morgan and Austin, Elisabeth, J. (2020) Unusual appearance of mother-of-pearl clouds above El Calafate, Argentina (50°21′S, 72°16′W). Weather, 75 (12), pp. 378-388. Wiley. doi: 10.1002/wea.3863. ISSN 0043-1656.

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Official URL: https://rmets.onlinelibrary.wiley.com/doi/10.1002/wea.3863


Visual observations from the ground and from a glider soaring in the lowermost stratosphere revealed the existence of stratospheric mother-of-pearl clouds above El Calafate in the lee of the Andes on 11 September 2019. The appearance of these clouds is rather unusual considering the time – end of the austral winter – and the location at about 50°S, being far away from Antarctica. This paper presents the available observations and describes the overall meteorological situation that was related to the earliest sudden stratospheric warming recorded so far in the Southern Hemisphere. By using high-resolution numerical simulations, we show evidence of mountain waves propagating up to the stratosphere that are responsible for generating the localised cold stratospheric temperature anomalies required for ice cloud formation. Snapshots of a mother-of-pearl cloud from the camera installed at the PERLAN 2 aircraft's tail wing.

Item URL in elib:https://elib.dlr.de/142591/
Document Type:Article
Title:Unusual appearance of mother-of-pearl clouds above El Calafate, Argentina (50°21′S, 72°16′W)
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Dörnbrack, AndreasDLR, IPAhttps://orcid.org/0000-0003-0936-0216
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242X
Kaifler, NatalieDLR, IPAhttps://orcid.org/0000-0002-3118-6480
Rapp, MarkusDLR, IPAhttps://orcid.org/0000-0003-1508-5900
Wildmann, NormanDLR, IPAhttps://orcid.org/0000-0001-9475-4206
Garhammar, MarkusLMU, MünchenUNSPECIFIED
Ohlmann, KlausQuo VadisUNSPECIFIED
Payne, James, M.The Perlan ProjectUNSPECIFIED
Sandercock, MorganThe Perlan ProjectUNSPECIFIED
Austin, Elisabeth, J.The Perlan ProjectUNSPECIFIED
Date:31 October 2020
Journal or Publication Title:Weather
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1002/wea.3863
Page Range:pp. 378-388
Keywords:Dynamics; Gravity waves; Mountain waves; Clouds; Aircraft observations
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Middle Atmosphere
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics > Lidar
Institute of Atmospheric Physics
Deposited By: Wildmann, Norman
Deposited On:02 Jun 2021 11:15
Last Modified:02 Jun 2021 11:15

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