Pluto's atmosphere gets its blue haze from icy organic compounds, study suggests

rod

Oct 22, 2019
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I found this in the report "(Since Pluto's atmosphere is roughly 175 degrees Fahrenheit, or 80 degrees Celsius, colder than Titan's, its atmospheric chemistry runs slower.)" Others report (I used MS BING) "The temperature and atmosphere of planet Pluto is about 369 degrees Fahrenheit or equivalent to 223 degrees Celsius. The variations in temperature and atmosphere are slight."

Something does not look correct concerning these Pluto atmosphere temperatures. Wikipedia reports about Pluto's atmosphere "Pluto has no or almost no troposphere; observations by New Horizons suggest only a thin tropospheric boundary layer. Its thickness in the place of measurement was 4 km, and the temperature was 37±3 K. The layer is not continuous.[10] Above it lays a layer with fast increase of temperature with height, the stratosphere. The temperature gradient is estimated to be 2.2,[7] 3–15[11] or 5.5[5] degrees per km. It is a result of greenhouse effect, caused by methane. The mean temperature of the surface is 42±4 K (measured in 2005),[34] and the mean value for the whole atmosphere is 90+25 −18 K (2008).[11][12][35] At height 20–40 km the temperature reaches its maximum (100–110 K; stratopause) and then slowly decreases (about 0.2 K/km;[4] mesosphere).[4][5][7] Causes of this decrease are unclear; it could be related to the cooling effect of carbon monoxide,[12] or hydrogen cyanide, or other reasons.[4] Above 200 km the temperature reaches approximately 80 K and then remains constant.[4] The temperature of the upper layers of the atmosphere does not show noticeable temporal changes. In 1988, 2002 and 2006 it was approximately constant and equal to 100 K (with uncertainty about 10 K), despite a twofold increase in pressure. Dependence on latitude or morning/evening conditions is also absent: temperature is the same above every part of the surface.[5] It is consistent with theoretical data, which predict fast mixing of the atmosphere.[5] But there is evidence for small vertical heterogeneities in temperature. They reveal themselves in sharp and brief spikes of brightness during stellar occultations.[29] Amplitude of these heterogeneities is estimated to be 0.5–0.8 K on the scale of a few km. They can be caused by atmospheric gravity waves or turbulence, which can be related to convection or wind.[29] Interaction with the atmosphere significantly influences the temperature of the surface. Calculations show that the atmosphere, despite its very low pressure, can significantly diminish diurnal variations in temperature.[36] But there still remain temperature variations of about 20 K – partly because of cooling of the surface due to sublimation of ices.[1]", https://en.wikipedia.org/wiki/Atmosphere_of_Pluto
 
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