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Recent anomalies of mean temperature of 12 consecutive months – Germany, Europe, Northern Hemisphere |
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| Authors: | Z W Kundzewicz F-W Gerstengarbe H Österle P C Werner W Fricke |
| Institution: | 1. Potsdam Institute for Climate Impact Research, P.O. Box 60 12 03, 14412, Potsdam, Germany 2. Research Centre for Agricultural and Forest Environment, Polish Academy of Sciences, Poznań, Poland 3. German Meteorological Service, Hohenpei?enberg Meteorological Observatory, Hohenpei?enberg, Germany |
| Abstract: | Anomalies of mean air temperature of 12 consecutive months were detected recently at a number of spatial scales: from local via national and continental, to hemispheric. At all these spatial scales, pre-2007 records were exceeded by considerable margins. The recent rise in the mean temperature of 12 consecutive months at several scales has remained largely unnoticed, because the 12-month means are seldom analyzed. Broad attention is typically focused on monthly, seasonal and annual temperatures. Analysis of shifted 12-month periods helps spot peculiar 12-month episodes with remarkable temperature anomalies that do not coincide with a calendar year. Introducing 12-month running mean temperatures into the global warming debate can prove useful. |
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