The function estimates body temperature (C, operative environmental temperature) of a marine snail. The function implements a steady-state model, which assumes unchanging environmental conditions and is based on (Iacarella and Helmuth 2012) . Body temperature and desiccation constrain the activity of Littoraria irrorata within the Spartina alterniflora canopy. The function was provided by Brian Helmuth and is a simplified version of the published model.
Tb_snail(temp, l, S, u, CC, WL, WSH)numeric air temperature (C).
numeric snail length (m).
numeric direct solar flux density (W m-2).
numeric wind speed (m s-1).
numeric fraction of the sky covered by cloud (0-1).
numeric water loss rate (kg s-1), 5 percent loss of body mass over one hour is a reasonable maximum level (Helmuth 1999)
.
numeric wind sensor height (m).
numeric predicted body (operative environmental) temperature (C).
Thermal radiative flux is calculated following Helmuth (1998) , Helmuth (1999) , and Idso and Jackson (1969) .
Helmuth B (1999).
“Thermal biology of rocky intertidal mussels: quantifying body temperatures using climatological data.”
Ecology, 80(1), 15-34.
doi:10.2307/176977
.
Helmuth BST (1998).
“Intertidal Mussel Microclimates: Predicting the Body Temperature of a Sessile Invertebrate.”
Ecological Monographs, 68(1), 51--74.
ISSN 00129615, doi:10.2307/2657143
.
Iacarella J, Helmuth B (2012).
“Body temperature and desiccation constrain the activity of Littoraria irrorata within the Spartina alterniflora canopy.”
Journal of Thermal Biology, 37(1).
doi:10.1016/j.jtherbio.2011.10.003
.
Idso SB, Jackson RD (1969).
“Thermal radiation from the atmosphere.”
Journal of Geophysical Research (1896-1977), 74(23), 5397-5403.
doi:10.1029/JC074i023p05397
.
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Grashof_number(),
Nusselt_from_Grashof(),
Nusselt_from_Reynolds(),
Nusselt_number(),
Prandtl_number(),
Qconduction_animal(),
Qconduction_substrate(),
Qconvection(),
Qemitted_thermal_radiation(),
Qevaporation(),
Qmetabolism_from_mass_temp(),
Qmetabolism_from_mass(),
Qnet_Gates(),
Qradiation_absorbed(),
Qthermal_radiation_absorbed(),
Reynolds_number(),
T_sky(),
Tb_CampbellNorman(),
Tb_Gates2(),
Tb_Gates(),
Tb_butterfly(),
Tb_grasshopper(),
Tb_limpetBH(),
Tb_limpet(),
Tb_lizard_Fei(),
Tb_lizard(),
Tb_mussel(),
Tb_salamander_humid(),
Tbed_mussel(),
Tsoil(),
actual_vapor_pressure(),
boundary_layer_resistance(),
external_resistance_to_water_vapor_transfer(),
free_or_forced_convection(),
heat_transfer_coefficient_approximation(),
heat_transfer_coefficient_simple(),
heat_transfer_coefficient(),
saturation_vapor_pressure(),
saturation_water_vapor_pressure()
Tb_snail(temp = 25,
l = 0.012,
S = 800,
u = 1,
CC = 0.5,
WL = 0,
WSH = 10)
#> [1] 38.79568