The increasing heat content of the world’s oceans over the past few decades is another climate change indicator. Ocean heat content (0-700 meters down) since 1955. Image courtesy of the NCDC. Reliable measurements, which now include the ARGO floats, clearly show that the overall upper ocean heat content is rising and this is also related to sea levels. As the
Assuming it will remain business as usual in terms of greenhouse gas emissions, episodes of extreme summertime heat will actually be the norm by mid-century in the Lower 48 states, according to new research from the Lawrence Livermore National Laboratory. The research team compared temperature data from 1975-2000 with similar data from 1950-1974 and determined that these observations along with
For the first time, new research has quantified the contribution of urban heat islands to overall global warming. The urban heat island effect is caused mostly by replacing soil and vegetation with paved roads, sidewalks and buildings. Paving prevents evaporation of water from the soil and plant leaves. Since evaporation is a cooling process, reducing evaporation warms cities. Additionally, the
The extreme drought across the southern U.S. Plains has certainly exasperated the intense heat the that has persisted through the summer. Did climate change play any role? There is just not enough data to say for certain that climate change played a role in the unusual heat and drought across parts of the U.S. this year, but it is likely
Is there a government conspiracy in the National Weather Service in regards to the Heat Index? A particular, well-known radio entertainer believes that that these recent high temperature index values were being reported as actual temperatures in some U.S. cities in order to strengthen the global warming debate. Whether he truly believes what he is saying is hard to say,
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