Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientifics have compiled temperature data of the 20th century in Spain as an evidence of the climatic change

14.04.2008
This research work is the first step to confirm the existence of a temperature change. Their main goal has been “to detect the signs of the Climatic Change through the temperatures in Spain”, explained to SINC the researcher of the department of Applied Physics of the University of Granada and main author, Matthias Staudt.

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
Changing a thermometer which has been calibrated in a different way is one of the factors why temperature data usually present incoherencies. In addition, the different reading interpretations of a human being or the frequent location changes of the observatories (changes from a urban environment to an airport, altitude changes, etc.) are problems with which the scientific team has had to deal with.“

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
Further information:
http://prensa.ugr.es/prensa/research/verNota/prensa.php?nota=515

More articles from Ecology, The Environment and Conservation:

nachricht Bioinvasion on the rise
15.02.2017 | Universität Konstanz

nachricht Litter Levels in the Depths of the Arctic are On the Rise
10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>