Mathematics – Logic
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.348..314r&link_type=abstract
Nature (ISSN 0028-0836), vol. 348, Nov. 22, 1990, p. 314-317. Research supported by NSF.
Mathematics
Logic
15
Atmospheric Circulation, Gravity Waves, Solitary Waves, Pressure Distribution, Radar Imagery, Wave Propagation, Wind (Meteorology)
Scientific paper
Atmospheric solitary waves are gravity waves that retain their integrity over long periods because of a near balance between nonlinearity and dispersion. They have been observed on various scales in many regions of the world, but this paper presents detailed measurements of solitary waves with amplitudes comparable to the scale height of the lower troposphere. Two such waves were generated downstream of intense midtropospheric pressure troughs over the central U.S. They propagated over 1000 km (several times their wavelength) with no appreciable change in structure within a 'waveguide' formed by surface inversion and a midtropospheric critical level. Fluctuations in surface pressure associated with the two waves exceeded 6 mbar and 10 mbar. The waves caused banded patterns of precipitation and significantly influenced other meteorological phenomena. The restoration of balance between pressure-driven air flow and the Coriolis force seems to have a prominent role in the formation of these solitary waves.
Collins Brian P.
Kennedy Patrick C.
Ramamurthy Mohan K.
Rauber Robert M.
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