Scientists at the European Commission released a paper describing evidence that confirms humans are causing global warming.
Many in the science community sees climate change as a major threat for humans in the near future. An new Yale study raises alarm that wealth will dramatically shift towards the poles - causing massive destabilization around the globe.
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Government near scientists also ring the alarm bells. A new study at the European Commission Joint Research Centre released a study last week with evidence that confirms that global warming is caused by humans.
A new statistical technique, analyzing data records since measuring started 150 years ago, independently confirms that man-made carbon dioxide (CO2) and methane (CH4) emissions have led to global warming, according to a JRC-led article published on 22 February 2016 in Nature Scientific Reports.
The analysis also shows that the most biggest consequences of such emissions are being felt in localized regions around the globe, such as Europe, North America, China, Siberia, the Sahel zone in Africa, and Alaska.
The authors investigated the causes of global warming using a new statistical method for quantifying causality to analyze the relation between time series data on greenhouse gas emissions and those on air temperatures in the last 150 years. The results confirm that recent global warming is mainly caused by increased anthropogenic (man-made) emissions and that further CO2 emissions to the atmosphere will lead to even stronger global warming.
This conclusion cannot be achieved through traditional, time-delayed correlations between temperature and GHG emissions changes or through ordinary least square regression analysis, as neither shows the causal relations. Being based on measured data, the results provide complementary support to model-based studies.
The authors applied the same technique to analyze historical air temperatures and CO2/CH4 data from the past 800 000 years, available thanks to the 3 meter deep ice core drilled in Antarctica more than a decade ago, which offers scientists a clue on a time scale of 800 millennia. They found a causal relationship between temperature increase and rising CO2/CH4 levels, which is the exact opposite of the results for the last 150 years. This also confirms the validity of the technique, as it is well known from the ice core data that in historical times, increase of temperatures had been followed by higher CO2/CH4 emissions. The causality relationship appears to have started reversing around 5 000 years ago. The analysis confirms this opposite trend for the last 150 years, when unprecedented amounts of CO2 started being pumped into the atmosphere in the industrial age.
Looking into the effect of anthropogenic emissions on different regions, the authors found strong causality between greenhouse gas emissions and rising temperatures in Europe, North America and China, where densely populated and industrialized areas have shown signs of strong warming. However, a high degree of causality was seen also in Siberia, the Sahel zone in Africa and Alaska, where human presence and associated activities are far less intense. The reasons for this pattern are not yet understood and should therefore become the focus of research to better understand regional climate dynamics.
This observational data-based study, therefore, not only provides complementary support for the results of modeling activities on global climate, but also indicates that further research should be carried out in regions of increased sensitivity to global warming caused by anthropogenic activities.