Relations between Aerodynamic Parameters of Heat Transfer and Thermal-Infrared Thermometry in the Bulk Surface Formulation

Disagreement of the thermal-infrared (TIR) surface temperature and the aerodynamic surface temperature, which is an effective surface temperature in estimating surface heat fluxes using the bulk method, is a critical problem in the combination of the TIR thermometry and the bulk method. The present study investigates two methods which adjust the disagreement. One is the method using the radiometric thermal roughness length, and the other is the method using empirical parameterizations (adjustment parameter method). Recent literature has shown a priority of the adjustment parameter method, however, the present study shows the radiometric thermal roughness length is analytically identical to the adjustment parameters, and it is verified by observation data that the two methods can be equally used in estimating sensible heat flux over a rice paddy, over a wide range of vegetation density. Moreover, it is shown that the adjustment parameters quantify the effect of viewing angle of measurement on the TIR surface temperature.

[1]  William P. Kustas,et al.  Use of remote sensing for evapotranspiration monitoring over land surfaces , 1996 .

[2]  J. Monteith,et al.  Radiative surface temperature and energy balance of a wheat canopy , 1986 .

[3]  J. A. Voogta,et al.  Thermal remote sensing of urban climates , 2003 .

[4]  R. D. Jackson,et al.  View angle effects in the radiometric measurement of plant canopy temperatures , 1980 .

[5]  J. I. MacPherson,et al.  Formulation of surface heat flux: Application to BOREAS , 1997 .

[6]  T. Oke,et al.  Thermal remote sensing of urban climates , 2003 .

[7]  Wilfried Brutsaert,et al.  Regional Surface Fluxes From Remotely Sensed Skin Temperature and Lower Boundary Layer Measurements , 1990 .

[9]  J. L. Monteith,et al.  Radiative surface temperature and energy balance of a wheat canopy , 1986 .

[10]  Estimating Regional Distribution of Sensible Heat Flux over Vegetation using Satellite Infrared Temp , 2000 .

[11]  Jean-Paul Lhomme,et al.  Sensible Heat Flux-Radiometric Surface Temperature Relationship Over Sparse Vegetation: Parameterizing B-1 , 2000, Boundary-Layer Meteorology.

[12]  Bruno Monteny,et al.  Sensible heat flux and radiometric surface temperature over sparse Sahelian vegetation. I. An experimental analysis of the kB−1 parameter , 1997 .

[13]  M. S. Moran,et al.  Determination of sensible heat flux over sparse canopy using thermal infrared data , 1989 .

[14]  B. Hicks,et al.  Flux‐gradient relationships in the constant flux layer , 1970 .

[15]  J. Kondo,et al.  Studies on the Bulk Transfer Coefficients over a Vegetated Surface with a Multilayer Energy Budget Model , 1992 .

[16]  B. L. Blad,et al.  Estimation of sensible heat flux from remotely sensed canopy temperatures , 1992 .

[17]  James A. Voogt,et al.  Modeling Surface Sensible Heat Flux Using Surface Radiative Temperatures in a Simple Urban Area , 2000 .

[18]  Anne Verhoef,et al.  Some Practical Notes on the Parameter kB−1 for Sparse Vegetation , 1997 .

[19]  Dean Vickers,et al.  Bulk Formulation of the Surface Heat Flux , 2004 .

[20]  David Yates,et al.  Directional radiometric temperature profiles within a grass canopy , 2000 .

[21]  Eni G. Njoku,et al.  Examination of the difference between radiative and aerodynamic surface temperatures over sparsely vegetated surfaces , 1996 .

[22]  Jielun Sun,et al.  Diurnal Variations of Thermal Roughness Height over a Grassland , 1999 .

[23]  W. Brutsaert,et al.  Sensible Heat Transfer Parameterization for Surfaces with Anisothermal Dense Vegetation , 1996 .

[24]  M. Sugita,et al.  Radiometrically determined skin temperature and scalar roughness to estimate surface heat flux. Part I: Parameterization of radiometric scalar roughness , 1994 .

[25]  W. Brutsaert.  Evaporation into the atmosphere , 1982 .

[26]  J. Kondo,et al.  A Proper Method for Estimating Sensible Heat Flux above a Horizontal-Homogeneous Vegetation Canopy Using Radiometric Surface Observations , 1997 .