Open AccessMaps of polar mesospheric clouds
Author(s) -
Carbary J. F.,
Morrison D.,
Romick G. J.
Publication year - 2003
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2002jd002255
Subject(s) - polar , altitude (triangle) , latitude , geology , atmospheric sciences , physics , geodesy , astronomy , geometry , mathematics
A middle ultraviolet imager (235–263 nm) on the Midcourse Space Experiment (MSX) has obtained the first large‐scale, two‐dimensional maps of polar mesospheric clouds (PMCs). The lower parts of individual images, which lie below the ozone horizon, are mapped onto an ellipsoidal shell at 83 km altitude and then combined to establish the transpolar PMC field in two spatial dimensions across the entire polar region. At all latitudes where they appear, the PMCs clearly evidence a “patchy” structure as opposed to a uniform layer. Among the interesting features of these cloud patches are zonal alignments, arcs, and repetitive structures characteristic of waves. Whether random or repetitive, the cloud structures exhibit scales ranging from several hundred kilometers down to tens of kilometers.