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 | |
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/Territory | France |
City | Toulouse |
Period | 21/07/03 → 25/07/03 |