Estimating helicity in the atmospheric boundary layer from acoustic sounding data

被引：8

作者：

Vazaeva, N. V. ^{[1
,2
]}

Chkhetiani, O. G. ^{[1
,3
]}

Kouznetsov, R. D. ^{[1
,4
]}

Kallistratova, M. A. ^{[1
]}

Kramar, V. F. ^{[1
]}

Lyulyukin, V. S. ^{[1
]}

Kuznetsov, D. D. ^{[1
]}

机构：

[1] Russian Acad Sci, Obukhov Inst Atmospher Phys, Moscow 119017, Russia

[2] Bauman Moscow State Tech Univ, Moscow 105005, Russia

[3] Russian Acad Sci, Space Res Inst, Moscow 117997, Russia

[4] Finnish Meteorol Inst, FI-001001 Helsinki, Finland

来源：

IZVESTIYA ATMOSPHERIC AND OCEANIC PHYSICS | 2017年 / 53卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

ABL; acoustic sounding; numerical simulation; helicity; POTENTIAL VORTICITY; TURBULENT HELICITY; SODAR; SYSTEM;

D O I：

10.1134/S0001433817020104

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Distributions of the velocity-field helicity in the atmospheric boundary layer have been obtained from acoustic sounding data. The helicity of large-scale motions (0.3-0.6 m/s(2)) exceeds (by an order of magnitude) its independently measured turbulent values, which are close to helicity averaged over the layer (0.02-0.12 m/s(2)). In the absence of strong convection, there is good correlation between helicity and wind velocity squared at upper sounding levels of 400 to 600 m.

引用

页码：174 / 186

页数：13

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