The Reflectivity of Deciduous Trees and Herbaceous Plants in the Infrared to 25 Microns

Gates, David M.; Tantraporn, W.

doi:10.1126/science.115.2997.613

Cited by 153 publications

(55 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An important fraction of the incident visible and infra-red light on leaves is reflected (BILLINGS and MORRIS 1951, GATES and TANTRAPORN 1952, SEYBOLD 1955, BARTH 1957. Very little is known about the influence of pesticide treatments on the reflective properties on the surface of the leaf.…”

Section: D) Optical Propertiesmentioning

confidence: 98%

Cuticula of leaves and the residue problem

Linskens

Heinen

Stoffers

1965

Residue Reviews / Rückstands-Berichte

View full text Add to dashboard Cite

Section: D) Optical Propertiesmentioning

confidence: 98%

Cuticula of leaves and the residue problem

Linskens

Heinen

Stoffers

1965

Residue Reviews / Rückstands-Berichte

View full text Add to dashboard Cite

“…The leaf was assumed to be gray in the 1-to 20-,u wavelength range, with an emissivity of 0.95 (5,6). We also assumed that the radiation surfaces were isothermal, diffuse, and that the leaf was concentrically located in the chamber.…”

Section: Energy Balancementioning

confidence: 99%

Transient Heat and Mass Transfer from a Leaf Undergoing Stomatal Closure in a Low Pressure Environment

Aylor

Krikorian

1970

Plant Physiol.

View full text Add to dashboard Cite

Stomatal control of water loss was studied in a low pressure environment by using detached leaves of Crassula argentea Thunb., Peperomia obtusifolia (L.) A. Dietr., and Setcreasea pallida Rose cv. ' Hg) the molecular mean free path of water vapor, X, is large compared with the significant flow dimension, the stomatal pore width, 2b large Knudsen number (defined as X/2b) characterizes free molecule flow, wherein intermolecular collisions are rare, and the flow is determined solely by molecular collisions with the wall. For the species used, the ratio of the guard cell thickness to the stomatal pore width is of the order 10, designated hereafter as 0 (10) for the mass flow rate through a unit area of leaf surface. In the above expression , is the ratio of the vapor pressure outside to that inside the stomatal cavity; L is the length of the stomatal tube; a and b are the semimajor and semiminor axes of the elliptical cross-section of the stoma, respectively; R is the specific gas constant; Hfg is the difference in the specific enthalpies of liquid water and vapor; D is a constant with units of pressure, and T is leaf temperature.In Equation 1 the total pressure inside the leaf has been taken to be the saturation vapor pressure over a pure, free water surface at leaf temperature. It has been tacitly assumed that flow is quasisteady and that the ratio of the pore diameter to the substomatal intercellular area is so small that it, and not the vaporization process at the liquid-gas interface, controls the net rate of molecules leaving the leaf surface. According to the arguments of Slatyer (17)

show abstract

“…For instance, in the middle of the last century, Gates and Tantraporn (1952) measured leaf reflectance spectra of shrubs and numerous deciduous trees between 1 µm and 25 µm wavelengths. In preliminary studies, Salisbury and Milton (1988) used TIR data to investigate the reflectance spectra of leaves from different plant species over 2.5 µm and 13.5 µm domain and showed that deciduous species have unique reflectance features; Rubio et al (1997) measured the emissivity of 35 vegetation species in the wavelengths between 8 µm and 14 µm and concluded that the vegetation shows a near grey body behavior.…”

Section: Thermal Remote Sensing Of Vegetationmentioning

confidence: 99%

“…Emissivity spectra depend on leaf surface temperature (Becker and Li 1990) and are part of the radiation term in the energy budget of the leaves (Gates 2012). The temperature of a canopy surface depends on the balance between incoming solar energy and energy loss.…”

Section: Introductionmentioning

confidence: 99%

“…The temperature of a canopy surface depends on the balance between incoming solar energy and energy loss. Leaves absorb a certain fraction of the incident radiation with this energy, dividing it over three outgoing streams: re-radiation, convective heat exchange with the air, and evaporation or transpiration (Gates 2012). A large proportion of these outgoing streams is devoted to convective heat exchange with the air.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sensing vegetation canopies in the thermal domain

Neinavaz¹

View full text Add to dashboard Cite

The Reflectivity of Deciduous Trees and Herbaceous Plants in the Infrared to 25 Microns

Cited by 153 publications

References 6 publications

Cuticula of leaves and the residue problem

Cuticula of leaves and the residue problem

Transient Heat and Mass Transfer from a Leaf Undergoing Stomatal Closure in a Low Pressure Environment

Sensing vegetation canopies in the thermal domain

Contact Info

Product

Resources

About