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Measurement and parameterization of aerodynamic roughness length variations at Haut Glacier d'Arolla, Switzerland

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Measurement and parameterization of aerodynamic roughness length variations at Haut Glacier d'Arolla, Switzerland. / Brock, Ben; Willis, Ian C.; Sharp, Martin J.

In: Journal of Glaciology, Vol. 52, No. 177, 03.2006, p. 281-297.

Research output: Contribution to journalArticle

Harvard

Brock, B, Willis, IC & Sharp, MJ 2006, 'Measurement and parameterization of aerodynamic roughness length variations at Haut Glacier d'Arolla, Switzerland' Journal of Glaciology, vol 52, no. 177, pp. 281-297.

APA

Brock, B., Willis, I. C., & Sharp, M. J. (2006). Measurement and parameterization of aerodynamic roughness length variations at Haut Glacier d'Arolla, Switzerland. Journal of Glaciology, 52(177), 281-297doi: 10.3189/172756506781828746

Vancouver

Brock B, Willis IC, Sharp MJ. Measurement and parameterization of aerodynamic roughness length variations at Haut Glacier d'Arolla, Switzerland. Journal of Glaciology. 2006 Mar;52(177):281-297.

Author

Brock, Ben; Willis, Ian C.; Sharp, Martin J. / Measurement and parameterization of aerodynamic roughness length variations at Haut Glacier d'Arolla, Switzerland.

In: Journal of Glaciology, Vol. 52, No. 177, 03.2006, p. 281-297.

Research output: Contribution to journalArticle

Bibtex - Download

@article{689dba2eeb024a5e9196c61a988a0a35,
title = "Measurement and parameterization of aerodynamic roughness length variations at Haut Glacier d'Arolla, Switzerland",
author = "Ben Brock and Willis, {Ian C.} and Sharp, {Martin J.}",
note = "dc.publisher: International Glaciological Society",
year = "2006",
volume = "52",
number = "177",
pages = "281--297",
journal = "Journal of Glaciology",
issn = "0022-1430",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Measurement and parameterization of aerodynamic roughness length variations at Haut Glacier d'Arolla, Switzerland

A1 - Brock,Ben

A1 - Willis,Ian C.

A1 - Sharp,Martin J.

AU - Brock,Ben

AU - Willis,Ian C.

AU - Sharp,Martin J.

PY - 2006/3

Y1 - 2006/3

N2 - Spatial and temporal variations in aerodynamic roughness length (z0) on Haut Glacier d'Arolla, Switzerland, during the 1993 and 1994 ablation seasons are described, based on measurements of surface microtopography. The validity of the microtopographic z0 measurements is established through comparison with independent vertical wind profile z0 measurements over melting snow, slush and ice. The z0 variations are explained through correlation and regression analyses, using independent measurements of meteorological and surface variables, and parameterizations are developed to calculate z0 variations for use in surface energy-balance melt models. Several independent variables successfully explain snow z0 variation through their correlation with increasing surface roughness, caused by ablation hollow formation, during snowmelt. Non-linear parameterizations based on either accumulated melt or accumulated daily maximum temperatures since the most recent snowfall explain over 80% of snow z0 variation. The z0 following a fresh snowfall on an ice surface is parameterized based on relationships with the underlying ice z0, snow depth and accumulated daily maximum temperatures. None of the independent variables were able to successfully explain ice z0 variation. Although further comparative studies are needed, the results lend strong support to the microtopographic technique of measuring z0 over melting glacier surfaces.

AB - Spatial and temporal variations in aerodynamic roughness length (z0) on Haut Glacier d'Arolla, Switzerland, during the 1993 and 1994 ablation seasons are described, based on measurements of surface microtopography. The validity of the microtopographic z0 measurements is established through comparison with independent vertical wind profile z0 measurements over melting snow, slush and ice. The z0 variations are explained through correlation and regression analyses, using independent measurements of meteorological and surface variables, and parameterizations are developed to calculate z0 variations for use in surface energy-balance melt models. Several independent variables successfully explain snow z0 variation through their correlation with increasing surface roughness, caused by ablation hollow formation, during snowmelt. Non-linear parameterizations based on either accumulated melt or accumulated daily maximum temperatures since the most recent snowfall explain over 80% of snow z0 variation. The z0 following a fresh snowfall on an ice surface is parameterized based on relationships with the underlying ice z0, snow depth and accumulated daily maximum temperatures. None of the independent variables were able to successfully explain ice z0 variation. Although further comparative studies are needed, the results lend strong support to the microtopographic technique of measuring z0 over melting glacier surfaces.

U2 - 10.3189/172756506781828746

DO - 10.3189/172756506781828746

M1 - Article

JO - Journal of Glaciology

JF - Journal of Glaciology

SN - 0022-1430

IS - 177

VL - 52

SP - 281

EP - 297

ER -

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