The study, by climate scientists Xuebin Zhang and Francis Zwiers of Environment Canada, and Peter Stott of the UK Meteorological Office, is published in the September issue of the American Meteorological Society's Journal of Climate.
In the study, the scientists used four climate models – two developed by Environment Canada, and two developed by the UK Met Office.
The three regions in the study have experienced rising temperatures during the 20th century. The scientists analyzed temperature measurements from 1900 to 1999, to determine the geographic patterns and timing of this warming, as it changed from decade to decade. The researchers then used computer-based climate models developed at the Canadian Centre for Climate Modeling and Analysis and the Hadley Centre for Climate Prediction and Research to simulate the climates over the same time periods.
They found that simulations which include human influences on climate were able to reproduce the patterns and evolution of the observed temperature changes. This indicates that the models can simulate climate change, even at a scale as small as that of a large country, and that natural variability of the climate system alone can not explain the observed warming.
In Canada, south of 70° N. latitude, human-induced climate change was detected most clearly in the period from 1950 to 1999. Canada has warmed by about 1° C. over the past 100 years. The temperature rise from 1950 to 1999 was more pronounced than in the first half of the 20th century.
Over the past 10 years, climate scientists have been making steady progress in finding evidence of human-induced climate change. The challenge is to separate the natural fluctuations in climate from those that are caused by human activities. On a global scale, it is easier to detect such small changes in climate, as the natural fluctuations tend to average out for a large area. Scientists are now able to identify the human fingerprint on smaller areas, even at the scale of a single large country. Researchers attribute this progress to improvements in computer models, faster supercomputer capability, a growing record of historical climate information, and the fact that climate change is now becoming more pronounced.
This research also gives the scientists increased confidence in their ability to predict future climate change. By using computer models to simulate climate change that has already occurred, the researchers have demonstrated the accuracy of the model projections.
Stephanie Kenitzer | EurekAlert!
Litter is present throughout the world’s oceans: 1,220 species affected
27.03.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
International network connects experimental research in European waters
21.03.2017 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
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