The compilation of maximum and minimum temperature series of every month since the end of the 19th century until the beginning of the 21st century has not always been an easy task. The data, which have been collected in 45 Spanish observatories, were not “homogeneous” in every case. In climatology, a series of data (temporary series) is considered as homogeneous when its content reflects exclusively the climatic evolution (this is, when the different indexed factors are absent). Therefore, the researchers’ work has mainly consisted in removing inhomogeneous “pollution” in data.
According to the scientist, analysing the quality of the data –which were published in November in the International Journal of Climatology- becomes, the “best method to believe in the final results”. “Technical preparation is essential to take the second step and do research into the rise of temperature at an unquestionable statistical level”, he added.Data homogeneization
Moving a thermometer without recording this fact gives rise to a very strange result which can not be explained 50 years later”, explained Staudt. Besides this, there are human typographical errors which present “non-homogeneous” data.
Scientists have been working for five years to find out, evaluate and repair the data series. “In order to make them as reliable as possible without converting them into a pretext for those reluctant to admit the existence of the Climatic Change”, explained the researcher. Although he admits that he has not obtained absolute conclusions, he has managed to establish a “normality” criterion in the behaviour of temperatures. “With a high level of probability, a qualitative decrease of seven degrees from April to May is not normal, as there should be a rise in any case”, he said.
Due to the homogeneization problems specified in the analysed monthly series, the researchers have set themselves a very strict “detection of un-homogeneities” criterion. Despite this, the instrumental error in a temperature measurement is in the order of 0.1ºC, and the error of a difference between data, previously treated with the homogeneization method, rises to the order of 0.4ºC. This error is not negligible but anyway it is “considerably smaller than the gross data”.
To come to conclusions that confirm climatic change in Spain, at a high level of reliability, this technical work involves a “necessary and obvious effort”. Staudt said that “the results obtained about the Climatic Change are not new, but they will confirm what we (almost) already knew”.
Antonio Marín Ruiz | alfa
Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel
Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
19.02.2018 | Information Technology
19.02.2018 | Ecology, The Environment and Conservation
19.02.2018 | Life Sciences