A statement by the met office has said that this year is set to be in the top two hottest years of all time.
1998 saw the hottest year on record until now. During 1998 temperatures soared because of a strong El Nino in the Pacific. This year also had an El Nino, a warming event that takes place in the Pacific, however this El Nino was quickly diminished by the forming of La Nina, a cooling event. Despite the La Nina, records this year are still hotter than that of 1998.
A spokesman from the Met Office state that this is evidence standing on the side of man-made global warming. The last decade was the hottest ever recorded.
Ahead of the latest UN talks on climate change in Cancun, Mexico, the Met Office analyses trends in climate and reveals that the evidence for man-made warming has grown even stronger in the last year.
Dr Matt Palmer, an ocean observations specialist at the Met Office, said: “It is clear from the observational evidence across a wide range of indicators that the world is warming. As well as a clear increase in air temperature observed above both the land and sea, we see observations which are all consistent with increasing greenhouse gases.”
These changes include:
Increases in water temperature at the sea surface down a depth of hundreds of metres.
An increase in humidity as a warmer atmosphere holds more moisture.
Increases in sea level as warmer waters expand and land-ice melts.
Shrinking of Arctic sea-ice, glaciers and Northern Hemisphere spring snow cover.
Since the late 1970s the long-term rate of surface warming has been about 0.16 °C per decade. However, over the last decade the rate of warming has decreased.
Natural variability within the climate system could explain all of this recent decrease. Other factors could have contributed.
Changes in stratospheric water vapour
Increased aerosol emissions from Asia
The rate of warming has been underestimated in the last decade because of:
changes to sea-surface temperature measurement practices;
strong warming in the Arctic — where there are fewer observations.
Dr Vicky Pope said: “Our analysis confirms that the signals of warming are as strong as they ever have been. Improving our understanding of the factors that affect short- and long-term trends is helping us to improve our predictions of the future, helping others to make choices on mitigation and adaptation providing a more resilient future.”
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