<i>Thomas Mann</i>. J. M. Lindsay

Nicholls, Roger A.

doi:10.1086/389151

Cited by 1 publication

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“…8 to 11, it is apparent that the primary mountain wave response is in the form of long, nearly hydrostatic waves which propagate up into the upper troposphere and low stratosphere. Smaller standing lee waves and transient modes are sometimes evident, Other observations (McPherson and Nicholls 1971 ;Nicholls 1973;Lilly and Kennedy 1973) are documented of similar wave structures for large amplitude waves. These patterns of airflow are also qualitatively similar to, but weaker than, that described by Lilly (1978) for waves associated with an intense downslope windstorm on 11 January 1972.…”

Section: Observational Resultsmentioning

confidence: 80%

Aircraft measurements of wave momentum flux over the Colorado Rocky Mountains

Lilly¹,

NICHOLLS²,

CHERVIN³

et al. 1982

Quarterly Journal of the Royal Meteorological Society

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SUMMARYResults are presented from a programme designed to measure the momentum flux associated with standing gravity waves over the central Rocky Mountains of North America. The purpose was to determine momentum losses from the westerlies as they cross a mountainous section of the northern hemisphere where wave drag is believed to be substantial. The data from one to three instrumented aircraft, operating on 20 flight days, mostly during January to March of 1973, are in reasonably good conformity with linear wave theory and also correlate well with surface measurements of downslope winds.,Downward westerlymomentum flux averaged 0.5 -l.Odynescm-* (0.05 -0.1 Pa). The mean westerly flow on the flight days was near the climatological mean for the period of the project, although the mean flow over this period as a whole was much weaker than the climatological mean.

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Section: Observational Resultsmentioning

confidence: 80%