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    Global climate change

    Higher CO2 Concentrations actually do cause Warming in the Tropics

    7/02/2014, 6:04:24 AM

    New research out of the University of Bristol's (UK) Cabot Institute contradicts previous studies in regards to the temperature impacts in the tropical regions due to higher concentrations of atmospheric CO2.

    Earlier research found that warming due to increasing CO2 was largely confined to the mid-high latitudes, with little, if any impact on long-term temperature trends in the tropical latitudes.

    This latest study, which was led by professor Richard Pancost, found that tropical sea surface temperatures were warmer 3-5 million years ago during the early-mid Pliocene Period when atmospheric CO2 concentrations were near 400 ppm and the highest in the past 5 million years. However, as most of us already know, that 400 ppm level was reached once again last summer due to human activity.


    The research team focused on the South China Sea, using a combination of geochemical records to reconstruct sea surface temperatures in the far past.


    Two out of the three different approaches to reconstruct the ocean temperature records agreed with the results, while the third method only agreed by making assumptions on magnesium and calcium changes in seawater over the past 5 million years.

    "These results confirm what climate models have long predicted – that although greenhouse gases cause greater warming at the poles they also cause warming in the tropics. Such findings indicate that few places on Earth will be immune to global warming and that the tropics will likely experience associated climate impacts, such as increased tropical storm intensity," said professor Pancost. (via the university of Bristol report)

    The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com


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    Global climate change