My personal experience

[Sunsettommy]

From the,Greenhouse_Effect_Poppycock_updated.pdf presentation.

Quote:PPS by Hans Schreuder: There is no greenhouse effect in our atmosphere other than the mechanism that prevents night-time temperatures from dropping lower than they would otherwise, due to the presence of humidity (water vapor) – that mechanism does however not add one single degree of warmth to the day that follows and water vapor actually acts as a cooling agent during the hours of sunlight.

To illustrate the case for water vapor, consider a tropical island and a desert at equal latitude and receiving the same amount of solar radiation and think about these questions, with the concept of
warmer/cooler relative to the maximum possible level given solar radiation and Stefan-Boltzmann’s law:

1. Is the tropical island warmer or cooler due to its high humidity (answer: cooler during the day, warmer
during the night)

2. Is the desert warmer or cooler due to its low humidity (answer: warmer during the day, cooler during
the night)

I have been in the Philippines 5 times over the years and experienced first hand what Hans is describing for the tropical island climate.(this is about 10 degrees North)

The highs vary very little from day to day in the 88-93 degree range,and it was that way in both Manila and Tacloban.The humidity in the 90% range that changes very little.The night lows barely go down to around 78-84 degrees.

That is only about a 10-15 degree change over all.

I live in a semi desert and again experience first hand what he is describing.(this is about 46 degrees North latitude)

It can be hot in the summer reaching 105 degrees and yet cool down overnight back to around 60-65 degrees.

That would be a 40-45 degree change!

The difference is due to the level of humidity in the two described regions.

[Richard111]

I can confirm those observations. I lived three years in the Namib Desert in South West Africa. I spent three years in the Persian Gulf, working in the desert of the Arab Emirates, visiting Abu Dhabi and Sharja. I also spent a year on Das Island and and Levan Island. Then for the tropics I was in Singapore and up in Bangkok. (That was a wonderful place before the Americans arrived. Nothing to do with climate of course.)

Then in Germany, near the Dutch border, in 1961 when I was in the army had my only taste of -20C temperatures. While on guard duty you had to pick up a bottle of anti-freeze from the guardhouse window and give it a shake. If it turned cloudy the guard was called out to start all the truck engines in the motor pool. This was necessary as the camp was on 45 minute evacuation standby in case the Ruskies started throwing nuclear stuff around. Elvis Presley was in Germany during the period. Never met him, he was in the American army.

Now I am retired in South West Wales, the coldest I've noted was -7C for three days last year and the warmest was +31C back in 2003 for just one day. Of course a couple of weeks at around +25C was considered hot by the locals.

The main point is that the extremes in the temperate zones of the planet were short lived events just lasting a few days or so. The extremes in the tropical areas were always tied to seasonal weather, i.e. hot in summer, cooler in winter.

The daily temperature changes from day, night, day and the influence of cloud or clear skies can be observed almost daily. Here, this morning at 6:00am the outside temperature was +2C, it has been close to that every day this month, cold for this time of year. The max will be about +14C, still slightly below normal. But the main effect is the wind. Currently blowing from the north-east giving very noticeable windchill.

That has been the main change here so far. The wind pattern seems to have changed. I do so wish the south-westerlies would come back.