A formula for determination of the roughness height for turbulent heat transfer between the land surface and the atmosphere over bare soil surfaces

Z. Su; R. Zhang; X. Sun; Z. Zhu; S. Liu

doi:10.1109/IGARSS.2003.1294729

A formula for determination of the roughness height for turbulent heat transfer between the land surface and the atmosphere over bare soil surfaces

Z. Su^*, R. Zhang, X. Sun, Z. Zhu, S. Liu

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

Roughness height for heat transfer is a crucial parameter in estimation of heat transfer between the land surface and the atmosphere, especially when radiometric measurements are used. Although many empirical formulations have been proposed, the uncertainties associated with these formulations are shown to be large, especially over sparse canopies. In this contribution, a simple physically based formula is derived for the estimation of the roughness height for heat transfer for bare soil surfaces. The new formula is validated with measurements collected in a filed campaign in Xiaotangshan, near Beijing, China in 2002. The present model is further shown to be able to explain the diurnal variation in the roughness height for heat transfer. The turbulent heat fluxes estimated using radiometric measurements as inputs are markedly improved when this new formula is used.

Original language	English
Title of host publication	IGARSS 2003
Subtitle of host publication	Proceedings 2003 IEEE International Geoscience and Remote Sensing Symposium
Place of Publication	Piscataway, NJ
Publisher	IEEE
Pages	3202-3204
Number of pages	3
ISBN (Print)	0-7803-7929-2
DOIs	https://doi.org/10.1109/IGARSS.2003.1294729
Publication status	Published - 24 Nov 2003
Externally published	Yes
Event	IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2003: Learning From Earth's Shapes and Colours - Toulouse, France Duration: 21 Jul 2003 → 25 Jul 2003

Conference

Conference	IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2003
Abbreviated title	IGARSS 2003
Country	France
City	Toulouse
Period	21/07/03 → 25/07/03

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title = "A formula for determination of the roughness height for turbulent heat transfer between the land surface and the atmosphere over bare soil surfaces",

abstract = "Roughness height for heat transfer is a crucial parameter in estimation of heat transfer between the land surface and the atmosphere, especially when radiometric measurements are used. Although many empirical formulations have been proposed, the uncertainties associated with these formulations are shown to be large, especially over sparse canopies. In this contribution, a simple physically based formula is derived for the estimation of the roughness height for heat transfer for bare soil surfaces. The new formula is validated with measurements collected in a filed campaign in Xiaotangshan, near Beijing, China in 2002. The present model is further shown to be able to explain the diurnal variation in the roughness height for heat transfer. The turbulent heat fluxes estimated using radiometric measurements as inputs are markedly improved when this new formula is used.",

author = "Z. Su and R. Zhang and X. Sun and Z. Zhu and S. Liu",

year = "2003",

month = nov,

day = "24",

doi = "10.1109/IGARSS.2003.1294729",

language = "English",

isbn = "0-7803-7929-2",

pages = "3202--3204",

booktitle = "IGARSS 2003",

publisher = "IEEE",

address = "United States",

note = "IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2003 : Learning From Earth's Shapes and Colours, IGARSS 2003 ; Conference date: 21-07-2003 Through 25-07-2003",

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Su, Z, Zhang, R, Sun, X, Zhu, Z & Liu, S 2003, A formula for determination of the roughness height for turbulent heat transfer between the land surface and the atmosphere over bare soil surfaces. in IGARSS 2003: Proceedings 2003 IEEE International Geoscience and Remote Sensing Symposium. IEEE, Piscataway, NJ, pp. 3202-3204, IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2003, Toulouse, France, 21/07/03. https://doi.org/10.1109/IGARSS.2003.1294729

A formula for determination of the roughness height for turbulent heat transfer between the land surface and the atmosphere over bare soil surfaces. / Su, Z.; Zhang, R.; Sun, X.; Zhu, Z.; Liu, S.

IGARSS 2003: Proceedings 2003 IEEE International Geoscience and Remote Sensing Symposium. Piscataway, NJ : IEEE, 2003. p. 3202-3204.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - A formula for determination of the roughness height for turbulent heat transfer between the land surface and the atmosphere over bare soil surfaces

AU - Su, Z.

AU - Zhang, R.

AU - Sun, X.

AU - Zhu, Z.

AU - Liu, S.

PY - 2003/11/24

Y1 - 2003/11/24

N2 - Roughness height for heat transfer is a crucial parameter in estimation of heat transfer between the land surface and the atmosphere, especially when radiometric measurements are used. Although many empirical formulations have been proposed, the uncertainties associated with these formulations are shown to be large, especially over sparse canopies. In this contribution, a simple physically based formula is derived for the estimation of the roughness height for heat transfer for bare soil surfaces. The new formula is validated with measurements collected in a filed campaign in Xiaotangshan, near Beijing, China in 2002. The present model is further shown to be able to explain the diurnal variation in the roughness height for heat transfer. The turbulent heat fluxes estimated using radiometric measurements as inputs are markedly improved when this new formula is used.

AB - Roughness height for heat transfer is a crucial parameter in estimation of heat transfer between the land surface and the atmosphere, especially when radiometric measurements are used. Although many empirical formulations have been proposed, the uncertainties associated with these formulations are shown to be large, especially over sparse canopies. In this contribution, a simple physically based formula is derived for the estimation of the roughness height for heat transfer for bare soil surfaces. The new formula is validated with measurements collected in a filed campaign in Xiaotangshan, near Beijing, China in 2002. The present model is further shown to be able to explain the diurnal variation in the roughness height for heat transfer. The turbulent heat fluxes estimated using radiometric measurements as inputs are markedly improved when this new formula is used.

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