Precipitation measurements have a well-documented and mostly wind-dependent bias which is especially apparent during solid precipitation events. The resulting inaccuracy in precipitation data remains an area of concern in quantifying regional and global climate trends. As a high-latitude country, Norway has many solid precipitation events often accompanied by high wind speeds where the current adjustment functions have only limited validity. The presented study aims at improving the quality of solid precipitation data. In a comprehensive field experiment, precipitation data of standard automatic gauges are compared with data of a reference gauge surrounded by a double fence construction to minimize wind impact. Additional meteorological parameters are measured at the test site, allowing for an in-depth analysis of high-temporal-resolution precipitation data. The goal is to develop new adjustment functions for solid precipitation measurements which account for Norway's typical climate and are suitable for automated measurements. Measurements began in winter 2010/2011 at the alpine test site in southern Norway (chosen after a pre-study in 2009/2010) and will continue for two more winters. In this paper, the test site and its instrumentation are described and preliminary results are presented.
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Research Article|
July 30 2012
Measurements of wind-induced loss of solid precipitation: description of a Norwegian field study
Mareile Wolff;
1Norwegian Meteorological Institute, PO Box 43 Blindern, 0313 Oslo, Norway
E-mail: [email protected]
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Ketil Isaksen;
Ketil Isaksen
1Norwegian Meteorological Institute, PO Box 43 Blindern, 0313 Oslo, Norway
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Ragnar Brækkan;
Ragnar Brækkan
1Norwegian Meteorological Institute, PO Box 43 Blindern, 0313 Oslo, Norway
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Eli Alfnes;
Eli Alfnes
2Statkraft, PO Box 200 Lilleaker, 0216 Oslo, Norway
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Asgeir Petersen-Øverleir;
Asgeir Petersen-Øverleir
2Statkraft, PO Box 200 Lilleaker, 0216 Oslo, Norway
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Erik Ruud
Erik Ruud
2Statkraft, PO Box 200 Lilleaker, 0216 Oslo, Norway
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Hydrology Research (2013) 44 (1): 35–43.
Article history
Received:
November 04 2011
Accepted:
May 22 2012
Citation
Mareile Wolff, Ketil Isaksen, Ragnar Brækkan, Eli Alfnes, Asgeir Petersen-Øverleir, Erik Ruud; Measurements of wind-induced loss of solid precipitation: description of a Norwegian field study. Hydrology Research 1 February 2013; 44 (1): 35–43. doi: https://doi.org/10.2166/nh.2012.166
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