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I’ve frequently been asked how we know that human activity is responsible for a warming earth. Of course there are natural factors that are influencing the climate, such as sunspots (on time scales up to a decade), orbital variations around the sun (on time scales of 10,000 to 100,000 years),…
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After a few weeks’ hiatus, here is the latest question from the Georgia Climate Project. This week’s question is on how urban areas are affecting local weather and climate. You probably have already heard of the urban heat island and how it makes cities warmer, but you might not know…
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If you’ve ever wondered how climate models work and why climatologists use them to look at the future climate, you might be interested in this long but excellent description of climate models and how they are used. There is a lot of excellent detail in this presentation at https://www.carbonbrief.org/qa-how-do-climate-models-work.
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Earlier this month, Forbes.com published a simple and clearly written article describing what global warming is and how it works. I am not sure I would characterize it as the simplest ever, but it is still a good explanation of how carbon dioxide and other gases are affecting the temperature…
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Even though there is no snow in the forecast for most of the Southeast at the moment, you might enjoy this. The Washington Post has a nice video describing how snowflakes get their shape. You can read more and view it at https://www.washingtonpost.com/weather/2018/12/26/how-snowflake-gets-its-shape/?utm_term=.21707cff1bd4&wpisrc=nl_rainbow&wpmm=1.
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Today marks the winter solstice, when we experience the shortest day of the year. This is because of the tilt of the earth’s axis of rotation relative to our orbit around the sun. So if you celebrate the winter astronomically, then today is the first day of winter. If you…
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Changes in temperature in the Southeast over the last 100 years or so have been relatively small, especially compared to other parts of the US and the world. That has led to what we call a “warming hole” in the Southeast that gives people here the impression that global temperatures…
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