Is the Climate Change we have observed natural or anthropogenic?

[BethesdaWX]

If increased solar radiation reaching the surface where the main cause of the warming we should expect the pattern of temperature increase to be reflected by additional daytime heating. That is not what we observe however, the pattern of warming is that of nighttime warming more than daytime. Most of the warming has been occurring during the night time hours during which the net flow of energy is out to space, a clear fingerprint of greenhouse warming.

Fewer clouds would add to warming during the daytime while also permitting a greater loss of thermal energy to space at night. The dominant warming period would be during the daytime.

Actually no that is not true, what matters is the amount of sunlight entering over the oceans, latent heat buildup, and so on, the entire climate system will warm significantly with just 1W/m^2 (1%) change in overall cloudiness over the tropics, into the oceans.

A more humid atmosphere results from increased OHC, which is a product of increased SW radiation into the oceans, predominately the tropical oceans, which store the largest relative portion of our energy budget by a large marigin.

I could argue the lower troposphere isn't warming 20% faster than the surface as a whole like it should (the tropics even alone have shown more warming at the surface than the lower troposphere). It doesn't prove anything but what has been done is "widening the error bars" in order to say "well, we can't be sure the hotspot isn't there".

Even the papers touted on your side of the debate, none of them actually "found the hotspot", but rather widened the error bars to make is possible for it to be there. You NEVER, EVER, adjust observational data to match a model, that is a direct violation of the scientific method.

[salbers]

The BADLY sited weather stations are showing the nighttime temperatures warm faster than the daytime temperatures. Interestingly, in the raw data with the adequately sited Weather Stations, there is actually a positive diurnal temperature trend, wheras in the badly sited weather stations, there is a negative slope in the diurnal temperature range, indicating that Urbanization alone has contributed to at least most of the reason as to why the diurnal temperature slope is negative in the badly sited weather stations. A negative slope in the diurnal temperature trend indicates that the difference between daytime and nighttime temperatures is becoming less. This is due to surface land use changes distorting the Energy Flows, with asphault now absorbing more ISR as opposed to some ISR being reflected like regular land would allow. The asphault would store more energy than regular land would, and during the nighttime, less heat is radiated from the asphault, and little heat is lost from the asphault system, as opposed to the land system, which can not store that much heat, and the heat is quickly lost from the land system. Thus, in Urbanized locations, it can be expected to see a negative diurnal temperature slope, as observed due to land use changes. However, what is REALLY interesting is that in the adequately cited weather stations, there is a POSITIVE slope in the diurnal temperature range for the raw data. In the adequately cited weather stations, there is no Urbanization to create this slope, so what could be causing it? Could the decreasing Cloud Cover allow for more ISR to reach Earth's Surface, warming the daytime temperatures, and allow for more OLR to escape, cooling the nighttime temperatures, that would create a positive trend in the diurnal temperature range for the nicely sited weather stations?

The chart above is from Fall et. al 2011. The lines all represent the how well the weather stations have been sited. CRN 1 and 2 indicate weather stations where little to no Urbanization bias can be observed. CRN 3 is where a moderate Urbanization bias can be observed. CRN 4 and 5 are where a high Urbanization bias can be observed. With the raw data, there is a clear upward trend in the diurnal temperature range for CRN 1 and 2. The only way that this could be explained is through a decrease in Cloud Cover impacting the diurnal temperature range in the badly cited stations, as it is the only known variable that would increase daytime temperatures and decrease nighttime temperatures if a decrease in GCC were to occur.

The last line of the Fall et. al. abstract though states there is no change in diurnal trend over time for the well sited stations. I suppose that assumes the adjustments being made are important.