CEOP Reference Site Data Set Metadata Procedures The documentation (i.e. the "Readme" file) that accompanies each CEOP Reference Site Data Set is as important as the data itself. This information permits collaborators and other analysts to become aware of the data and to understand any limitations or special characteristics of data that may impact its use elsewhere. The data set documentation should accompany all data set submissions and contain the information listed in the outline below. The following outline (and content) should be adhered to as closely as possible to make the documentation consistent across all data sets. A documentation file submission must accompany each submitted data set. TITLE: BALTEX_Sodankyla_ObservatorSiteB_20080101_20081231.stm CONTACT(S): Timo Ryyppö timo.ryyppo@fmi.fi +358-40 5921210 Rigel Kivi rigel.kivi@fmi.fi Esko Kyrö esko.kyro@fmi.fi Finnish Meteorological Institute Arctic Research Centre Tähteläntie 62 FIN-99600 Sodankylä FINLAND Tel: +358-16-619 619 Fax: +358-16-619 623 Web: http://www.fmiarc.fmi.fi, http://www.fmi.fi 1.0 DATA SET OVERVIEW: Data file is compiled for the CEOP project under responsibility of BALTEX. See CEOP web-site for project background: http://www.ceop.net Time period covered by the data: 01.01.2008-31.12.2008 Data are measured at Sodankyla Arctic Research Centre's Observatory (Observatory Site B): Coordinates (WGS-84) lat: 67 21' 42,7" lon: 26 38' 16,2" elev: 179,3 m a.s.l Operational data (i.e. whole data set): Finnish Meteorological Institute. 2.0 INSTRUMENTATION DESCRIPTION: Soil temperature: Pentronic PT100, -5cm, -10cm, -20cm, -30cm, -50cm Soil moisture: ThetaProbe ML2x, -5cm, -10cm, -20cm, -30cm, -50cm 3.0 DATA COLLECTION AND PROCESSING: All the available data is measured and collected automatically. Soil temperature and moisture data is logged with Vaisala MAWS weather station. All data is collected via leased network connection to FMI. 4.0 QUALITY CONTROL PROCEDURES Visual checking, and in addition numerical limits for soil moisture: If the temperature value is below zero, the corresponding moisture value is flagged as dubious. This is due the fact that there should be no moisture in the frozen (T<0) soil. If the moisture value was below zero, it was set as a missing value of -999.99 and flagged as missing. For more information about quality control and flagging, see contact persons. 5.0 GAP FILLING PROCEDURES No gap filling applied. 6.0 DATA REMARKS: Data is classified as category 1 with reference to CEOP data classification. Soil temperature and moisture values are 10 minutes avarage values which are avaraged over the 30-minutes prior to the reported observation. Missing data periods flagged with "M" and corresponding data marked as "-999.99" (see: http://www.eol.ucar.edu/projects/ceop/dm/documents/refdata_report/data_flag_definitions.html). 7.0 REFERENCE REQUIREMENTS: Finnish Meteorological Institute must be stated as data source when the data are used. 8.0 REFERENCES: