BartNL Posted April 20, 2015 Share Posted April 20, 2015 Hi everybody I’m new here. I live in The Netherlands, nearby Amsterdam. I’m a biologist, but I’ve always been interested in the weather and in climate change. I’ve made nice overviews (at least, I hope so) of the temperatures in the US, based on data of the NOAA National Climatic Data Center. Please click here for a PDF of one of the stations. There is a Fahrenheit version and a Celsius version. Therefore, all the data are double available. At the bottom of the PDF page you can see the highest and the lowest minimum and maximum temperature for each month, and the day and the year on witch this temperature was reached. It shows the history of the temperatures in 80 places in the US since 1976. The background colors show the daily mean temperature (Tmax + Tmin)/2; good enough for this purpose. Also the presence of a snow cover and the snow depth are shown. The monthly averages are also taken from the National Climatic Data Center. Based on that, I calculated the average annual temperature, and the 30-year average temperature. The data from the Data Center are given in Celsius. I converted it to Fahrenheit but maybe this can give small differences with official published values. Why this? Well, I started to do this with de Dutch data, then I took the German data and then the European data. And the data from the U.S. are easy to access, so… O.K., you can say I spend too much time doing this, but it’s kind of interesting. From a European point of view, the American data are interesting because we hear a lot of stories of very cold winters in the US, while here in this part of Europe we didn’t have a winter at all; nor did we have last year. With the 30-year average I want to show climate change (in fact not necessarily that; when there is no change, I want to show that as well) but I do realize that there can be all kind of bias in the data. In some stations in the US you can see a significant increase of the 30-year average, while on some other places there is not much of a change. I’ve been looking for official published normals of the main stations in the US. I only found these data of the period 1951-1980 and 1981-2010. More about that later. Link to comment Share on other sites More sharing options...
Sophisticated Skeptic Posted April 21, 2015 Share Posted April 21, 2015 waiting for someone else to click on it...to say it's o.k. Link to comment Share on other sites More sharing options...
BartNL Posted April 21, 2015 Author Share Posted April 21, 2015 waiting for someone else to click on it...to say it's o.k. Ah... Thank you! I forgot to explain the Hellman Winter Number. That’s a simple index to express the amount of frost during the winter. It’s calculated as the sum of all the negative mean daily temperatures (expressed in Celsius) without the minus-sign. Traditionally it’s calculated over the period November- March, but in some cases October-April should be better. In Europe it’s mainly used in German speaking countries, the Netherlands and Belgium as far as I can see. Link to comment Share on other sites More sharing options...
Sophisticated Skeptic Posted April 21, 2015 Share Posted April 21, 2015 why not just post a screenshot teaser first? (so we know ur not full of it) Link to comment Share on other sites More sharing options...
BartNL Posted April 21, 2015 Author Share Posted April 21, 2015 why not just post a screenshot teaser first? (so we know ur not full of it) OK, thanks again... let's try Dayton, Fahrenheit version. For more click http://www.logboekweer.nl/International/UnitedStatesTemperatureHistoryF.htm Link to comment Share on other sites More sharing options...
SVT450R Posted April 22, 2015 Share Posted April 22, 2015 Welcome to the forum Bart. Thanks for the link very cool presentation for temperature data. Link to comment Share on other sites More sharing options...
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