Introduction
 Theses
    Introduction
    Warm healted
    Cool sea - cool winter
    What counts
    Polar air everywhere
    Ice invaded Norway
    Baltic experiment
    Solid Arctic axis
    Four decades cold
    Why Britain cold
    Cause for warm
    Spreading of warming
    One rise - two shifts
 Cooling Europe 1939
 Climate down 1939-42
 Sea War turn climate
 Big Warming 1918
 Climate change twice
 References
 Previous Essays
 
 
 
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Theses 6A

Thesis    Facts    Evidence    Conclusion   
 

One rise – two wars - two shifts

The constant temperature rise since 1880, with two interruptions by war at sea

 

Thesis

The constant rise of global temperature since about 1880 was interrupted twice by two significant climatic changes. The first was a two-decade warming after 1920 and the second a slight cooling after 1940. The two shifts were caused by the two world wars.

 

Facts

After the end of the ‘Little Ice Age’ in mid 19th century, the global temperatures started to rise.

The first interruption of the rising temperature trend occurred, when the war at sea in 1917/18 reached its peak. This incident resulted in an increased warming of the Northern Hemisphere for two decades.

The second interruption of the accelerated warming period 1920 to 1940 occurred when the war at sea commenced in 1939 and continued on a regional basis until 1941, and on a global basis until 1945, neutralising the pre-1920 and pre-1940 trend for four decades. Thereon the pre-war trends presumed their previous pace. Since 1980 the temperatures are rising again.

From a statistical point of view during the last 150 years show primarily a natural recovery from the cooling of the ‘Little Ice Age’ with a constant rising trend, with two ‘disturbances’ effected by WWI and WWII.

 

Evidence

The warfare at sea unleashed mighty forces, capable of changing the conditions of oceans and seas to an extent that made climatic change inevitable.

WWI’s sea warfare around Britain initiated some kind of change in the Norwegian Sea that brought about the Big Warming at Spitsbergen in 1918, and subsequently the northern North Atlantic region for two decades.

WWII generated a small cooling of global temperatures since 1940 and a non-rising trend for four decades, by fighting a global war at sea in the North Atlantic and Pacific between 1942 and 1945.

When the impact of WWII vanished, the previous trend resumed to rising temperatures.

 

Conclusion and further reading

The most spectacular climatic changes during the last 20th century were caused by the two major wars at seas, 1914/18 and 1939/40. Two wars – two trends; Climatic shifts (6_11), and War at sea 1914 – 18 (5_13), and Spitsbergen heats up (5_12), and Oceans at war (4_11), and Sea system effected (4_12).

 


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