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Public release date: 25-Jul-2012[ | E-mail |
Share ] Contact: Sina Loeschke
Sina.Loeschke@awi.de
0049-471-483-12008
Helmholtz Association of German Research Centres
Radiation researchers from all over the world meet at the Alfred Wegener Institute
The problem appeared to be almost paradoxical. Whenever small groups of white, dense cumulus clouds passed by the sun in the sky over Munich, more sun rays hit the photovoltaic plates of a manu-facturer than physicists had calculated for a day of sun under cloudless blue skies. The consequence: the installations produced maximum energy values which could not be used, however, because the converters of the solar modules were not ideally adjusted. "Only once a comparison was made with the radiation data of our European BSRN stations, did the cause for these maximum radiation values become clear. Under conditions of this type, not only the direct sun rays hit the solar modules, but also the white scatter light from the clouds. This is an added extra which must of course be included in the calculation and considered in the case of photovoltaic systems ", says Dr. Gert Knig-Langlo, head of the World Radiation Monitoring Center (WRMC) at the Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association.
Radiation issues such as this will be the topics when the Alfred Wegener Institute invites to the twelfth international BSRN Workshop in Potsdam. Some 70 radiation experts and data users from all over the world have so far registered. "The main focus of the three-day event will be to get talking to each other. As BSRN we endeavour to provide the best surface radiation data in the world. But for this we must also know what the data users require exactly", says Gert Knig-Langlo.
The Basic Surface Radiation Network currently consists of 54 measurement stations and the WRMC as central data archive: "We collect the measurement data of all 54 stations and the Alfred Wegener Institute itself even operates two of these. One measurement station is located at the Neumayer Station III in the Antarctic and the other at the Arctic research station in Ny lesund in Spitzbergen", explains Gert Knig-Langlo.
Each of these stations contains a wealth of sensors which measure the surface radiation at intervals of a few seconds. An average value and a maximum and a minimum are calculated per minute. "Our data have such a high temporal resolution that radiation fluctuations can be recognised precisely and it can be seen when the sun disappeared behind the clouds and when there was a clear sky", says Gert Knig-Langlo. Since the end of the eighties a data set has been created in this way which is now so large that a single person would have to note the respective radiation data around the clock every min-ute of the day for 670 years to obtain about the same data volume.
This density of the BSRN measurement data is appreciated primarily by the operators of scientific satellites. They use the radiation values as ground-based, highly precise and reliable comparative data to uncover measurement errors in their satellite data. Climate modellers have recourse to the data set if they wish to check the accuracy of their computer calculations. And a study from 2011 has shown that when planning thermal solar power stations it is a good idea to consult the BSRN measurement re-sults. Gert Knig-Langlo: "These many examples show that the network and its archive at the Alfred Wegener Institute make a substantial contribution to climate observations."
###
Information on the 12th International BSRN Workshop:
Date: 1 to 3 August 2012
Place: Alfred Wegener Institute Potsdam, on the Telegrafenberg in Potsdam
Programme: http://www.bsrn.awi.de/en/other/workshop_2012/
Information for editors:
Printable images of the BSRN Station of the Alfred Wegener Institute in the Antarctic are available in the online version of this press release at http://www.awi.de/en/news/press_releases/detail/item/climate_reseach_with_additional_benefit_international_experts_in_surface_radiation_meet_at_the_alfr/?cHash=188959d9aa23956f87e072e7d1221ca8
Your contact partner in the Alfred Wegener Institute is Dr. Gert Knig-Langlo (0471 4831-1806; email: Gert.Koenig-Langlo@awi.de). Your contact partner in the Communication and Media Department is Sina Lschke (Tel.: 0471 4831-2008; email: Sina.Loeschke@awi.de).
The Alfred Wegener Institute conducts research in the Arctic, Antarctic and in the high and mid-latitude oceans. The Institute coordinates German polar research and provides important infrastruc-ture such as the research ice breaker Polarstern and stations in the Arctic and Antarctic to the inter-national scientific world. The Alfred Wegener Institute is one of the 18 research centres of the Helm-holtz Association, the largest scientific organisation in Germany.
[ | E-mail | Share ] ?
AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.
Public release date: 25-Jul-2012[ | E-mail |
Share ] Contact: Sina Loeschke
Sina.Loeschke@awi.de
0049-471-483-12008
Helmholtz Association of German Research Centres
Radiation researchers from all over the world meet at the Alfred Wegener Institute
The problem appeared to be almost paradoxical. Whenever small groups of white, dense cumulus clouds passed by the sun in the sky over Munich, more sun rays hit the photovoltaic plates of a manu-facturer than physicists had calculated for a day of sun under cloudless blue skies. The consequence: the installations produced maximum energy values which could not be used, however, because the converters of the solar modules were not ideally adjusted. "Only once a comparison was made with the radiation data of our European BSRN stations, did the cause for these maximum radiation values become clear. Under conditions of this type, not only the direct sun rays hit the solar modules, but also the white scatter light from the clouds. This is an added extra which must of course be included in the calculation and considered in the case of photovoltaic systems ", says Dr. Gert Knig-Langlo, head of the World Radiation Monitoring Center (WRMC) at the Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association.
Radiation issues such as this will be the topics when the Alfred Wegener Institute invites to the twelfth international BSRN Workshop in Potsdam. Some 70 radiation experts and data users from all over the world have so far registered. "The main focus of the three-day event will be to get talking to each other. As BSRN we endeavour to provide the best surface radiation data in the world. But for this we must also know what the data users require exactly", says Gert Knig-Langlo.
The Basic Surface Radiation Network currently consists of 54 measurement stations and the WRMC as central data archive: "We collect the measurement data of all 54 stations and the Alfred Wegener Institute itself even operates two of these. One measurement station is located at the Neumayer Station III in the Antarctic and the other at the Arctic research station in Ny lesund in Spitzbergen", explains Gert Knig-Langlo.
Each of these stations contains a wealth of sensors which measure the surface radiation at intervals of a few seconds. An average value and a maximum and a minimum are calculated per minute. "Our data have such a high temporal resolution that radiation fluctuations can be recognised precisely and it can be seen when the sun disappeared behind the clouds and when there was a clear sky", says Gert Knig-Langlo. Since the end of the eighties a data set has been created in this way which is now so large that a single person would have to note the respective radiation data around the clock every min-ute of the day for 670 years to obtain about the same data volume.
This density of the BSRN measurement data is appreciated primarily by the operators of scientific satellites. They use the radiation values as ground-based, highly precise and reliable comparative data to uncover measurement errors in their satellite data. Climate modellers have recourse to the data set if they wish to check the accuracy of their computer calculations. And a study from 2011 has shown that when planning thermal solar power stations it is a good idea to consult the BSRN measurement re-sults. Gert Knig-Langlo: "These many examples show that the network and its archive at the Alfred Wegener Institute make a substantial contribution to climate observations."
###
Information on the 12th International BSRN Workshop:
Date: 1 to 3 August 2012
Place: Alfred Wegener Institute Potsdam, on the Telegrafenberg in Potsdam
Programme: http://www.bsrn.awi.de/en/other/workshop_2012/
Information for editors:
Printable images of the BSRN Station of the Alfred Wegener Institute in the Antarctic are available in the online version of this press release at http://www.awi.de/en/news/press_releases/detail/item/climate_reseach_with_additional_benefit_international_experts_in_surface_radiation_meet_at_the_alfr/?cHash=188959d9aa23956f87e072e7d1221ca8
Your contact partner in the Alfred Wegener Institute is Dr. Gert Knig-Langlo (0471 4831-1806; email: Gert.Koenig-Langlo@awi.de). Your contact partner in the Communication and Media Department is Sina Lschke (Tel.: 0471 4831-2008; email: Sina.Loeschke@awi.de).
The Alfred Wegener Institute conducts research in the Arctic, Antarctic and in the high and mid-latitude oceans. The Institute coordinates German polar research and provides important infrastruc-ture such as the research ice breaker Polarstern and stations in the Arctic and Antarctic to the inter-national scientific world. The Alfred Wegener Institute is one of the 18 research centres of the Helm-holtz Association, the largest scientific organisation in Germany.
[ | E-mail | Share ] ?
AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.
Source: http://www.eurekalert.org/pub_releases/2012-07/haog-crw072512.php
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