Falkland islands radar study impacts climate research

Posted by pt91 at Oct 22, 2010 03:04 PM |
New equipment will monitor activity which creates the ‘Southern Lights’
Falkland islands radar study impacts climate research

The completed Falkland Islands radar antenna array, comprising 16 50-foot masts. The radar electronics are housed in the 40-foot shipping container seen to the left. Picture Credit: Dr Chris Thomas, University of Leicester

Images available from pressoffice@le.ac.uk

Physicists and engineers at the University of Leicester and the British Antarctic Survey (BAS) have installed a radar system on the Falkland Islands to monitor the upper atmosphere activity which creates the ‘Southern Lights’.

The University’s Radio and Space Plasma Physics Research Group already operates radars in Iceland and Finland which measure activity in the Arctic region.  Now, in partnership with BAS, they are able to do the same in the Antarctic. The radar station itself is a group of 16 fifty-foot aerials which can bounce radio signals off charged particles in the ionosphere.

The new radar joins a network of 22 such radars, the international Super Dual Auroral Radar Network or SuperDARN.  Data from SuperDARN is made available across the internet in real time, monitoring the upper atmosphere to understand its link with the lower atmosphere, where our weather is, and the impact of the Sun’s ‘solar wind’ on our environment.

Solar wind particles are carried to Earth where our planet’s magnetic field focuses them towards the poles where they collide with atmospheric particles, creating the spectacular light effects of the Northern Lights (aurora borealis) and Southern Lights (aurora australis).

“There are several radars already covering parts of Antarctica but the Falklands location is particularly interesting,” says Dr Steve Milan. “The magnetic field in that area is relatively weak, a phenomenon called the South Atlantic Anomaly. Also, winds rising over the Andes mountain range affect the upper atmosphere there.”

The Falklands radar is funded by the Natural Environment Research Council (NERC).

It is a collaboration between the University of Leicester, which supplied the masts, and BAS, which provided the electronic equipment.

“The electronics come from a long-established BAS radar station which is currently being moved and rebuilt because it’s on an ice shelf which is slipping into the sea,” explains Dr Milan. “When the equipment came back to the UK for refurbishment, we realised that we could combine it with a spare set of antennas and temporarily establish a station on the Falklands.”

The radar station was built with the aid of engineers from Leicester and BAS over several weeks at the start of this year and went operational on 14 February. It is based at Goose Green, a remote community which was the site of a famous battle during the 1982 Falklands conflict.

“Although the Earth receives most of its energy from sunlight, it’s not clear how important the solar wind is for atmospheric dynamics,” says Dr Milan. “Climatologists need to be able to factor the influence of the solar wind into their measurements and calculations.”

More information on the UK’s contribution to SuperDARN can be found at www.superdarn.ac.uk.

NOTE TO NEWSDESK:

For more information, contact Dr Milan on Tel. +44 116 223 1896

Email: steve.milan@ion.le.ac.uk

Images: available from pressoffice@le.ac.uk

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Above: Erection of one of the 16 antennas that comprise the full Falkland Islands radar system, located at Goose Green.  Pictured are local contractors, who were overseen by University of Leicester and BAS engineers during a three-week construction period. Picture Credit: Dr Chris Thomas, University of Leicester

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Above: The completed Falkland Islands radar antenna array, comprising 16 50-foot masts.  The radar electronics are housed a 40-foot shipping container (seen behind the 4th mast from the left in the picture).  The settlement of Goose Green can be seen in the background.  The antennas were erected by a team of local contractors overseen by University of Leicester and BAS engineers during a three-week construction period. Picture Credit: Dr Chris Thomas, University of Leicester

The Natural Environment Research Council (NERC) is the UK's main agency for funding and managing world-class research, training and knowledge exchange in the environmental sciences. It coordinates some of the world's most exciting research projects, tackling major issues such as climate change, environmental influences on human health, the genetic make-up of life on earth, and much more.   NERC receives around £400 million a year from the government's science budget, which it uses to fund independent research and training in universities and its own research centres. www.nerc.ac.uk

British Antarctic Survey (BAS), a component of the Natural Environment Research Council, delivers world-leading interdisciplinary research in the Polar Regions. Its skilled science and support staff based in Cambridge, Antarctica and the Arctic, work together to deliver research that underpins a productive economy and contributes to a sustainable world. Its numerous national and international collaborations, leadership role in Antarctic affairs and excellent infrastructure help ensure that the UK maintains a world leading position. BAS has over 450 staff and operates five research stations, two Royal Research Ships and five aircraft in and around Antarctica. www.antarctica.ac.uk

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