# Commission Regulation (EC) No 1737/2006 of 7 November 2006 laying down detailed rules for the implementation of Regulation (EC) No 2152/2003 of the European Parliament and of the Council concerning monitoring of forests and environmental interactions in the Community, Division (45): Variable

Extent: E+W+S+N.I.

Indication of the variable that is measured with the instrument
AT air temperature
PR precipitation
RH relative humidity
WS wind speed
WD wind direction
SR solar radiation
UR UVb radiation
TF throughfall
SF stemflow
ST soil temperature
MP matric potential in the soil
WC water content in the soil
XX other codes for additional parameters may be used, but should be specified in the DAR.

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Source: https://www.legislation.gov.uk/eur/2006/1737/annex/I/chapter/15/division/7/division/45 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-1737/annex-I/chapter-15/division-7/division-45
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.