The Evolution of the Clear Air Convective Layer Revealed by Surface-Based Remote SensorsSource: Journal of Applied Meteorology:;1976:;volume( 015 ):;issue: 006::page 594Author:Noonkester, V. R.
DOI: 10.1175/1520-0450(1976)015<0594:TEOTCA>2.0.CO;2Publisher: American Meteorological Society
Abstract: A frequency-modulated, continuous-wave (FM-CW) radar, a high-power, narrow-beam, S-band radar, and an acoustic echo sounder made unique simultaneous observations of the growth and decay of the convective layer near a coastline. The S-band radar scanned the convective field over the vertically pointing radar and echo sounder. Detailed variations in the depth h of the clear air convective layer were observed. Although each sensor observed apparently independent convective features they provided a generally compatible and comprehensive description of the evolution of the convective layer when the individual sensor characteristics are considered. In general, h increased during the morning until about an hour before the maximum surface temperature and decreased slowly in the afternoon. The morning rise rate ?h/?t increased as the lapse rate of potential temperature ? over the convective layer decreased and was constant during the destruction of each layer having a constant ?. Recent studies propose that ?h/?t and ??½ are linearly related by a factor containing the surface heat flux; using the formulation of this factor, the data indicate that the surface heat flux was excessively large. This test suggests that some parametric formulations relating ?h/?t and ? may require modification. Features of entrainment and the wind field are discussed.
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contributor author | Noonkester, V. R. | |
date accessioned | 2017-06-09T17:38:37Z | |
date available | 2017-06-09T17:38:37Z | |
date copyright | 1976/06/01 | |
date issued | 1976 | |
identifier issn | 0021-8952 | |
identifier other | ams-9091.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4232541 | |
description abstract | A frequency-modulated, continuous-wave (FM-CW) radar, a high-power, narrow-beam, S-band radar, and an acoustic echo sounder made unique simultaneous observations of the growth and decay of the convective layer near a coastline. The S-band radar scanned the convective field over the vertically pointing radar and echo sounder. Detailed variations in the depth h of the clear air convective layer were observed. Although each sensor observed apparently independent convective features they provided a generally compatible and comprehensive description of the evolution of the convective layer when the individual sensor characteristics are considered. In general, h increased during the morning until about an hour before the maximum surface temperature and decreased slowly in the afternoon. The morning rise rate ?h/?t increased as the lapse rate of potential temperature ? over the convective layer decreased and was constant during the destruction of each layer having a constant ?. Recent studies propose that ?h/?t and ??½ are linearly related by a factor containing the surface heat flux; using the formulation of this factor, the data indicate that the surface heat flux was excessively large. This test suggests that some parametric formulations relating ?h/?t and ? may require modification. Features of entrainment and the wind field are discussed. | |
publisher | American Meteorological Society | |
title | The Evolution of the Clear Air Convective Layer Revealed by Surface-Based Remote Sensors | |
type | Journal Paper | |
journal volume | 15 | |
journal issue | 6 | |
journal title | Journal of Applied Meteorology | |
identifier doi | 10.1175/1520-0450(1976)015<0594:TEOTCA>2.0.CO;2 | |
journal fristpage | 594 | |
journal lastpage | 606 | |
tree | Journal of Applied Meteorology:;1976:;volume( 015 ):;issue: 006 | |
contenttype | Fulltext |