Most Ohio Record Temperatures Set Before 1940
By Paul Homewood
According to the National Centre for Atmospheric Research (NCAR), who produced the above graph,
Spurred by a warming climate, daily record high temperatures occurred twice as often as record lows over the last decade across the continental United States, new research shows.
I have already shown that, in Kansas, most records were set in the 1930’s. These are all time highs that still exist today. (For clarification, if a record temperature of 100F was set on 30th June 1934, and then beaten on 30th June 1980, it would only be the latter record which was shown). Of course, Kansas may be not be representative of the whole of the USA, so let’s have a look at another state, Ohio.
Oberlin is a small town with a population of about 8000 and situated in the north of the state, near to Cleveland. The USHCN station there has been at or near to the same location throughout the metadata record. According to the USHCN daily temperature records, the distribution of all time record high temperatures for each day of the year is as shown below.
Just as we saw in Kansas, many more records were set in the 1930’s than recently. Also the period from 1894 till about 1920 saw a large number of records . The above graph includes ties, so in total there are 455 records. Of these, 81 were set during the 1930’s, compared to just 20 in the last decade. By 1940, 260 records had been set, or 57% of the total.
There are no temperature measurements for Oberlin since 2009, so let’s have a look at another Ohio USHCN site that does. Portsmouth is a town of some 20,000 people, situated in the south of the state.
Just as in Oberlin, there was a rash of records set in the 1890’s and 1930’s. The last two decades appear to be the quietest on record for setting new temperature highs.
Which brings us back to NCAR. Why do they start their analysis in the cold 1950’s and 1960’s? What are they trying to hide?
So I issue this challenge to them – reproduce your graph right back to 1895, for which year you have full records, and, to ensure that we have consistency of data, use only USHCN stations that have records throughout the period, thereby avoiding the problem of increasing numbers of stations in recent years.