Noctilucent Clouds Seen from North America
Noctilucent clouds are tenuous ice clouds that form in the upper mesosphere over arctic and subarctic regions in the summer. Observations of the clouds made during 1988 and 1989 by the North American surveillance network NLC CAN AM are presented. Observing took place from 15 May to 15 August, except...
Published in: | ARCTIC |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Arctic Institute of North America
1991
|
Subjects: | |
Online Access: | https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64609 |
id |
ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64609 |
---|---|
record_format |
openpolar |
spelling |
ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64609 2023-05-15T14:19:12+02:00 Noctilucent Clouds Seen from North America Lohvinenko, Todd W. Zalcik, Mark S. 1991-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64609 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64609/48523 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64609 ARCTIC; Vol. 44 No. 4 (1991): December: 267–373; 328-336 1923-1245 0004-0843 Noctilucent clouds Alaska Canada Canadian Arctic North America info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1991 ftunivcalgaryojs 2022-03-22T21:21:48Z Noctilucent clouds are tenuous ice clouds that form in the upper mesosphere over arctic and subarctic regions in the summer. Observations of the clouds made during 1988 and 1989 by the North American surveillance network NLC CAN AM are presented. Observing took place from 15 May to 15 August, except for arctic sites, which observed from 1 April to 30 April and 15 August to 15 September due to the Midnight Sun. The peak incidence of noctilucent clouds occurred in July during both years. Both positive and negative sightings, that latter determined by at least two readings under favourable conditions, are plotted on date-latitude graphs. An apparent northern migration of noctilucent clouds (NCL) with latitude as the season progresses was detected. Although an attempt was made to look for an apparent longitudinal drift, none was found. A detailed comparison of how NLC have behaved and changed in the past quarter century is examined using the NCL CAN AM data in conjunction with the 1964-65 data presented by Fogle (1966).Key words: noctilucent clouds, northem migration, longitudinal drift, comparison Mots clés: nuages noctulescents, déplacement vers le nord, dérive en longitude, comparaison Article in Journal/Newspaper Arctic Arctic Subarctic Alaska midnight sun University of Calgary Journal Hosting Arctic Canada ARCTIC 44 4 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Noctilucent clouds Alaska Canada Canadian Arctic North America |
spellingShingle |
Noctilucent clouds Alaska Canada Canadian Arctic North America Lohvinenko, Todd W. Zalcik, Mark S. Noctilucent Clouds Seen from North America |
topic_facet |
Noctilucent clouds Alaska Canada Canadian Arctic North America |
description |
Noctilucent clouds are tenuous ice clouds that form in the upper mesosphere over arctic and subarctic regions in the summer. Observations of the clouds made during 1988 and 1989 by the North American surveillance network NLC CAN AM are presented. Observing took place from 15 May to 15 August, except for arctic sites, which observed from 1 April to 30 April and 15 August to 15 September due to the Midnight Sun. The peak incidence of noctilucent clouds occurred in July during both years. Both positive and negative sightings, that latter determined by at least two readings under favourable conditions, are plotted on date-latitude graphs. An apparent northern migration of noctilucent clouds (NCL) with latitude as the season progresses was detected. Although an attempt was made to look for an apparent longitudinal drift, none was found. A detailed comparison of how NLC have behaved and changed in the past quarter century is examined using the NCL CAN AM data in conjunction with the 1964-65 data presented by Fogle (1966).Key words: noctilucent clouds, northem migration, longitudinal drift, comparison Mots clés: nuages noctulescents, déplacement vers le nord, dérive en longitude, comparaison |
format |
Article in Journal/Newspaper |
author |
Lohvinenko, Todd W. Zalcik, Mark S. |
author_facet |
Lohvinenko, Todd W. Zalcik, Mark S. |
author_sort |
Lohvinenko, Todd W. |
title |
Noctilucent Clouds Seen from North America |
title_short |
Noctilucent Clouds Seen from North America |
title_full |
Noctilucent Clouds Seen from North America |
title_fullStr |
Noctilucent Clouds Seen from North America |
title_full_unstemmed |
Noctilucent Clouds Seen from North America |
title_sort |
noctilucent clouds seen from north america |
publisher |
The Arctic Institute of North America |
publishDate |
1991 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64609 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Arctic Subarctic Alaska midnight sun |
genre_facet |
Arctic Arctic Subarctic Alaska midnight sun |
op_source |
ARCTIC; Vol. 44 No. 4 (1991): December: 267–373; 328-336 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64609/48523 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64609 |
container_title |
ARCTIC |
container_volume |
44 |
container_issue |
4 |
_version_ |
1766290807198842880 |