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Mesospheric temperature during the extreme mid-latitude noctilucent cloud event on 18/19 July 2016

Kaifler, Natalie and Kaifler, Bernd and Wilms, Henrike and Rapp, Markus and Stober, Gunter and Jacobi, Christoph (2018) Mesospheric temperature during the extreme mid-latitude noctilucent cloud event on 18/19 July 2016. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES (ja), pp. 1-15. Wiley. DOI: 10.1029/2018JD029717 ISSN 2169-897X

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018JD029717

Abstract

A rare noctilucent cloud (NLC) event was observed at 48.8° N, 13.7° E above GERES station in southern Germany on 18/19 July 2016 using the CORAL Rayleigh lidar. Strong southward winds due to a quasi 2-day planetary wave allowed for the influx of mesospheric polar air to mid-latitudes on this day. The NLC observed by lidar was preceded by strong NLC displays in CIPS satellite images above the North Sea and by strong MSE radar echoes 800 km north of the lidar site, and was also observed visually in central Europe. The NLC occurred at low altitude and was bright and thin with strong oscillations in altitude and brightness. Darkness allowed for high-resolution temperature measurements at NLC altitudes. The ice particles were embedded in the upper part of a cold region with temperatures below 150 K. Significantly higher temperatures were found directly above the cloud with large vertical temperature gradients of 25 K/km at the top boundary. Spectral analysis reveals that NLC particles existed within cold phases of gravity waves within a region of high static stability. In order to study the evolution of NLC brightness in this environment we drive the microphysical model CARMA with lidar temperature soundings. We find that NLC particles can survive and grow in the conditions defining this mid-latitude event. We conclude that the ice particles did not nucleate at the site of observation, but were meridionally transported and vertically confined to a thin layer due to a large vertical temperature gradient, wind reversal, and low levels of mesospheric turbulence.

Item URL in elib:https://elib.dlr.de/125225/
Document Type:Article
Title:Mesospheric temperature during the extreme mid-latitude noctilucent cloud event on 18/19 July 2016
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kaifler, NatalieDLR, IPAhttps://orcid.org/0000-0002-3118-6480
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242X
Wilms, HenrikeDLR, IPAUNSPECIFIED
Rapp, MarkusDLR, IPAhttps://orcid.org/0000-0003-1508-5900
Stober, GunterLeibniz-Institut für Atmosphärenphysik, KühlungsbornUNSPECIFIED
Jacobi, ChristophUniv. LeipzigUNSPECIFIED
Date:15 December 2018
Journal or Publication Title:JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:0
DOI :10.1029/2018JD029717
Page Range:pp. 1-15
Publisher:Wiley
ISSN:2169-897X
Status:Accepted
Keywords:noctilucent clouds, polar mesospheric clouds, Rayleigh lidar, mesospheric temperature
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):Vorhaben Mittlere Atmosphäre
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics
Deposited By: Kaifler, Dr. Natalie
Deposited On:03 Jan 2019 15:51
Last Modified:31 Jul 2019 20:23

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