In the last Century the Earth has heated up 1.3 degrees centigrade. .
For the last 70 years the worlds average temperature measurement by 6 agencies all over the world are remarkably consistent.
The annual variation is caused by the seasons and the fact that the northern hemisphere cools and warms differently than the southern hemisphere since more of the worlds land mass is in the north.
Through about 1910 the temperature. as estimated from numerous records and investigations, was roughly constant plus or minus 0.4 of a degree. The average of this has been set at zero on this graph although the average world wide temperature was about 15 degrees centigrade.
The annual variation is caused by the seasons and the fact that the northern hemisphere cools and warms differently than the southern hemisphere since more of the worlds land mass is in the north.
Through about 1910 the temperature. as estimated from numerous records and investigations, was roughly constant plus or minus 0.4 of a degree. The average of this has been set at zero on this graph although the average world wide temperature was about 15 degrees centigrade.
After 1910 the temperature started to rise at a rate of approximately 0.017 per year until about 1942. Then the temperature actually went down, then it leveled out from 1950 to 1972 at about +0.4 and then continued it’s rise to +1.25 in 2020. This is a annual increase of 0.177 degrees CLet’s talk about how this comes about