The “Effective” emissivity of the atmosphere does not have to be large to be significant. The relationship to what is a small value of the thermal conductivity of the atmosphere is what is important. Note: In the table below borrowed from Thermal conductivity of CO2, http://www.engineeringtoolbox.com/carbondioxided_1000.html that the thermal conductivity of CO2 increases to its maximum near 20 C then decreases. Odd that? Now where in the world would that matter?
While I am sure that the thermal conductivity of the atmosphere is a constant topic of conversation among climate scientists, I have never heard it mentioned except when I asked about its impact.
So when I get around to it, I will attempt to fine tune the Kimoto equation, for now, I am comfortable with my preliminary results.
Temperature
 T 
(oC) Density
 ρ 
(kg/m3) Specific Heat Capacity
 cp 
(103 J/kg K) Thermal Conductivity
 k 
(W/m K) Kinematic Viscosity
 ν 
(106 m2/s) Prandtl Number
 Pr 
50 1156 1.84 0.086 0.119 2.96
40 1118 1.88 0.101 0.118 2.46
30 1077 1.97 0.112 0.117 2.22
20 1032 2.05 0.115 0.115 2.12
10 983 2.18 0.110 0.113 2.20
0 927 2.47 0.105 0.108 2.38
10 860 3.14 0.097 0.101 2.80
20 773 5.0 0.087 0.091 4.10
30 598 36.4 0.070 0.080 28.7
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 Simple Versus Too Simple
 New Blog For Easier Navigation
 Carbon Dioxide A Not so Well Mixed Gas
 Another Shot at Explaining the Atmospheric Effect
 Phonon Versus Photon Research List
 The Relativity Series Begins Under Cosmic Puzzles
 Atmospheric Phonons  RHC and the Greenhouse Effec...
 What the Heck is Effective Emissivity?
 SciFi and the Tropopause Heat Sink
 Could Atmospheric Conductivity Help Regulate Antar...
 The Relative Motion of Low Energy Photons in a Mi...
 What is a Pyrometer Measuring When You Aim it at t...
 I am Still Getting Flack over the Value of Down We...
 What is The 4C Thermal Boundary?
 The Mysterious Case of the Missing Heat
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 A Little Help Please. Global Average Surface Pres...
 Determing How Wrong I May Be
 Relativistic Conduction of Heat
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 Science as a Contact Sport
 A Point I Missed Explaining Very Well The Tropopa...
 Why The Estimates were Off and Why I am Moving On....
 Using the Greenhouse Effect Triangles
 Dark Energy and our Not Accelerating Expanding Uni...
 Explaining why Einstien, Angstrom, Plank, StefanB...
 Now, to Truly Prove I am a Whack Job
 IPCC Down Welling Radiation Violates the Law!
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