Comment on “Ecological importance of the thermal emissivity of avian eggshells”. (English) Zbl 1397.92725

Jiménez-Muñoz, Juan C.; Sobrino, José A.

J. Theor. Biol. 304, 304-307 (2012).

Summary: Eggshell emissivity must be known to determine accurately the cooling rate of avian eggs when the parent, after heating by conduction during the incubation, is temporarily absent. We estimate possible values of eggshell emissivities from in-situ measurements and spectral libraries. Emissivity is near to 1 (probably higher than 0.95) and therefore its effect on cooling rate may be negligible, with differences between the temperature of the egg assuming a value of \(\varepsilon=0.95\) and that of a blackbody \((\varepsilon=1)\) below \(0.2°\)C.
This article concerns [L. O. Björn et al., ibid. 301, 62–66 (2012; Zbl 1397.92713)].

MSC:

92D40	Ecology
92C05	Biophysics
80A99	Thermodynamics and heat transfer

Keywords:

eggshell emissivity; thermal infrared; heat radiation; cooling

Citations:

Zbl 1397.92713

Software:

ASTER Spectral Library; ECOSTRESS

References:

[1]	Baldridge, A.M.; Hook, S.J.; Grove, C.I.; Rivera, G., The ASTER spectral library version 2.0, Remote sens. environ., 113, 711-715, (2009)
[2]	Björn, L.O.; Uvdal, P.; Li, S., Ecological importance of the thermal emissivity of Avian eggshells, J.theor. biol., 301, 62-66, (2012) · Zbl 1397.92713
[3]	Gillespie, A.; Rokugawa, S.; Matsunaga, T.; Cothern, J.S.; Hook, S.; Kahle, A.B., A temperature and emissivity separation algorithm for advanced spaceborne thermal emission and reflection radiometer (ASTER) images, IEEE trans. geosci. remote sens., 36, 4, 1113-1126, (1998)
[4]	Gustafson, W.T.; Gillespie, A.R.; Yamada, G.J., Revisions to the ASTER temperatura/emissivity separation algorithm, (), pp. 770-775
[5]	Jiménez-Muñoz, J.C.; Sobrino, J.A., Emissivity spectra obtained from field and laboratory measurements using the temperature and emissivity separation algorithm, Appl. opt., 45, 7104-7109, (2006)
[6]	Lane, M.D., Midinfrared optical constants of calcite and their relationship to particle size effects in thermal emission spectra of granular calcite, J. geophys. res., E6, 14,099-14,108, (1999)
[7]	Sabol, D.E.; Gillespie, A.R.; Abbott, E.; Yamada, G., Field validation of the ASTER temperature-emissivity separation algorithm, Remote sens. environ., 113, 2328-2344, (2009)
[8]	Sobrino, J.A.; Mattar, C.; Pardo, P.; Jiménez-Muñoz, J.C.; Hook, S.J.; Baldrige, A.; Ibañez, R., Soil emissivity and reflectance spectra measurements, Appl. opt., 48, 19, 3664-3670, (2009)