Marianne Douglas, Professor of Earth and Atmospheric Science and Director of the Canadian Circumpolar Institute at the University of Alberta, and John Smol, Professor of Biology at Queen’s University, studied these unique Arctic ponds for the past 24 years, collecting detailed data such as water quality and water levels from approximately 40 ponds. Collectively, this data represents the longest record of systematic limnological (the science of the properties of fresh water) monitoring from the high Arctic.
Over the 24 years the researchers spent monitoring the ponds, they recorded evidence of recent lower water levels and changes in water chemistry consistent with an increase in evaporation/precipitation ratios (E/P) and warmer temperatures. Until recently, the ponds of the study sites were permanent features of the landscape, but in early July 2006, because of warming trends in the Arctic, several of the main study ponds dried up completely, whereas others had dramatically reduced water levels.
“It was quite shocking to see some of our largest study ponds dry up by early summer,” said Douglas.
The ecological ramifications of these changes are likely severe and will be felt throughout the Arctic ecosystem, says Douglas. It would affect waterfowl habitat and breeding grounds, invertebrate population dynamics and food for insectivores and drinking water for animals, to name only a few.
“These surface water ponds are so important because they are often hotspots of biodiversity and production for microorganisms, plants and animals in this otherwise extreme terrestrial environment.” said Douglas.
In February 2007, Dr. Douglas and a group of researchers met with European VIPS to discuss Canada’s role in the climate-change discussion. Josh Ashton, England’s special representative for climate change at the Foreign and Commonwealth Office, and Henry Derwent, director of climate, energy and environment risk at the UK Department for Environment, toured Canada to talk with scientists, industry representatives and policy-makers about global warming.
Kris Connor | alfa
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The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
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