Vertical wind velocity observations at the Cabauw tower

H.G. Ouwersloot; S.R. de Roode; F.C. Bosveld; P.S. Kroon

Abstract

If vertical turbulent fluxes are computed from time series collected at a fixed point, it is assumed that the temporal mean vertical velocity is zero. This paper discusses the validity of this assumption by analysis of time series of the vertical wind velocity collected with sonic anemometers at four different heights ranging from 3 to 180 m from the Cabauw tower. It is shown that even for averaging times of 1 hour, the mean vertical velocity can have values of the order of 10 cm/s.

Original language	English
Title of host publication	19th Symposium on Boundary Layers and Turbulence, American Meteorological Society, 2-6 August 2010, Keystone, Colorado, USA
Place of Publication	Boston
Publisher	AMS
Pages	P1.2
Publication status	Published - 2010
Event	19th Symposium on Boundary Layers and Turbulence - Keystone, United States Duration: 1 Aug 2010 → 6 Aug 2010

Conference

Conference	19th Symposium on Boundary Layers and Turbulence
Country	United States
City	Keystone
Period	1/08/10 → 6/08/10

Access to Document

https://edepot.wur.nl/160948

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title = "Vertical wind velocity observations at the Cabauw tower",

abstract = "If vertical turbulent fluxes are computed from time series collected at a fixed point, it is assumed that the temporal mean vertical velocity is zero. This paper discusses the validity of this assumption by analysis of time series of the vertical wind velocity collected with sonic anemometers at four different heights ranging from 3 to 180 m from the Cabauw tower. It is shown that even for averaging times of 1 hour, the mean vertical velocity can have values of the order of 10 cm/s.",

author = "H.G. Ouwersloot and {de Roode}, S.R. and F.C. Bosveld and P.S. Kroon",

year = "2010",

language = "English",

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booktitle = "19th Symposium on Boundary Layers and Turbulence, American Meteorological Society, 2-6 August 2010, Keystone, Colorado, USA",

publisher = "AMS",

note = "19th Symposium on Boundary Layers and Turbulence ; Conference date: 01-08-2010 Through 06-08-2010",

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Ouwersloot, HG, de Roode, SR, Bosveld, FC & Kroon, PS 2010, Vertical wind velocity observations at the Cabauw tower. in 19th Symposium on Boundary Layers and Turbulence, American Meteorological Society, 2-6 August 2010, Keystone, Colorado, USA. AMS, Boston, pp. P1.2, 19th Symposium on Boundary Layers and Turbulence, Keystone, United States, 1/08/10. <https://edepot.wur.nl/160948>

TY - CHAP

T1 - Vertical wind velocity observations at the Cabauw tower

AU - Ouwersloot, H.G.

AU - de Roode, S.R.

AU - Bosveld, F.C.

AU - Kroon, P.S.

PY - 2010

Y1 - 2010

N2 - If vertical turbulent fluxes are computed from time series collected at a fixed point, it is assumed that the temporal mean vertical velocity is zero. This paper discusses the validity of this assumption by analysis of time series of the vertical wind velocity collected with sonic anemometers at four different heights ranging from 3 to 180 m from the Cabauw tower. It is shown that even for averaging times of 1 hour, the mean vertical velocity can have values of the order of 10 cm/s.

AB - If vertical turbulent fluxes are computed from time series collected at a fixed point, it is assumed that the temporal mean vertical velocity is zero. This paper discusses the validity of this assumption by analysis of time series of the vertical wind velocity collected with sonic anemometers at four different heights ranging from 3 to 180 m from the Cabauw tower. It is shown that even for averaging times of 1 hour, the mean vertical velocity can have values of the order of 10 cm/s.

M3 - Abstract

SP - P1.2

BT - 19th Symposium on Boundary Layers and Turbulence, American Meteorological Society, 2-6 August 2010, Keystone, Colorado, USA

PB - AMS

CY - Boston

T2 - 19th Symposium on Boundary Layers and Turbulence

Y2 - 1 August 2010 through 6 August 2010

ER -