Natural climate fluctuations can offset or amplify man-made global warming

There have always been natural fluctuations in global temperatures due to the climate’s natural variability

Previously, natural factors have offset part of man-made warming. Forecasts say we have now entered a period where this effect is reversed, adding to total warming

But climatic forcings, such as greenhouse gas emissions, are driving temperatures up

+0.8C warming

0.4

0

-0.4

1900

1920

1940

1960

1980

2000

There have always been natural fluctuations in global temperatures due to the climate’s natural variability

Previously, natural factors have offset part of man-made warming. Forecasts say we have now entered a period where this effect is reversed, adding to total warming

But climatic forcings, such as greenhouse gas emissions, are driving temperatures up

+0.8C warming

0.4

0

-0.4

1900

1920

1940

1960

1980

2000

There have always been natural fluctuations in global temperatures due to the climate’s natural variability

But climatic forcings, such as greenhouse gas emissions, are driving temperatures up

Previously, natural factors have offset part of man-made warming. Forecasts say we have now entered a period where this effect is reversed, adding to total warming

+0.8C warming

0.4

0

-0.4

1900

1920

1940

1960

1980

2000