A case study of stably stratified airflow over the pennines using an instrumented glider

I. M. Stromberg; C. S. Mill; T. W. Choularton; M. W. Gallagher

doi:10.1007/BF00118451

A case study of stably stratified airflow over the pennines using an instrumented glider

I. M. Stromberg^*, C. S. Mill, T. W. Choularton, M. W. Gallagher

^*Corresponding author for this work

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Abstract

In this paper we present data gathered during a weak case of the Helm wind, an example of supercritical airflow, in the vicinity of Cross Fell in Northern England. Airborne measurements have been made using an instrumented glider with simultaneous ground-based measurements both on a hill summit and on the valley floor downwind of the hill. It is found that the major features of the airflow both near the surface and aloft, including the lee-wave activity are well reproduced by the airflow model of Carruthers and Choularton (1982). Secondary features including several higher modes of lee-waves and changes in the valley flow associated with nocturnal cooling were observed which could not be accounted for by the simple model.

Original language	English
Pages (from-to)	153-168
Number of pages	16
Journal	Boundary-Layer Meteorology
Volume	46
Issue number	1-2
DOIs	https://doi.org/10.1007/BF00118451
Publication status	Published - 1 Jan 1989

Keywords

Simple Model
High Mode
Valley Floor
Secondary Feature
Airborne Measurement

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10.1007/BF00118451

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title = "A case study of stably stratified airflow over the pennines using an instrumented glider",

abstract = "In this paper we present data gathered during a weak case of the Helm wind, an example of supercritical airflow, in the vicinity of Cross Fell in Northern England. Airborne measurements have been made using an instrumented glider with simultaneous ground-based measurements both on a hill summit and on the valley floor downwind of the hill. It is found that the major features of the airflow both near the surface and aloft, including the lee-wave activity are well reproduced by the airflow model of Carruthers and Choularton (1982). Secondary features including several higher modes of lee-waves and changes in the valley flow associated with nocturnal cooling were observed which could not be accounted for by the simple model.",

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AU - Mill, C. S.

AU - Choularton, T. W.

AU - Gallagher, M. W.

PY - 1989/1/1

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N2 - In this paper we present data gathered during a weak case of the Helm wind, an example of supercritical airflow, in the vicinity of Cross Fell in Northern England. Airborne measurements have been made using an instrumented glider with simultaneous ground-based measurements both on a hill summit and on the valley floor downwind of the hill. It is found that the major features of the airflow both near the surface and aloft, including the lee-wave activity are well reproduced by the airflow model of Carruthers and Choularton (1982). Secondary features including several higher modes of lee-waves and changes in the valley flow associated with nocturnal cooling were observed which could not be accounted for by the simple model.

AB - In this paper we present data gathered during a weak case of the Helm wind, an example of supercritical airflow, in the vicinity of Cross Fell in Northern England. Airborne measurements have been made using an instrumented glider with simultaneous ground-based measurements both on a hill summit and on the valley floor downwind of the hill. It is found that the major features of the airflow both near the surface and aloft, including the lee-wave activity are well reproduced by the airflow model of Carruthers and Choularton (1982). Secondary features including several higher modes of lee-waves and changes in the valley flow associated with nocturnal cooling were observed which could not be accounted for by the simple model.

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A case study of stably stratified airflow over the pennines using an instrumented glider

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Keywords

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