Wild, Martin

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2017-03-02, 22)54Flags – Global Energy Balance Archive | ETH ZurichSeite 1 von 2http://www.geba.ethz.ch/data-quality/flags.htmlFlagsA GEBA quality string belongs to every energy flux value in the GEBAdatabase. It consists of 7 characters. Each character is associatedwith a QCP. The result of QCP no. 1 is stored in character no. 7 (fromleft to right), the outcome of QCP no. 2 is saved in character no. 6, theresult of QCP no. 3 in character no. 5, etc. Thus a GEBA quality stringcontains the outcomes of up to seven QCPs applied to the energy fluxvalue, to which the string belongs.The result of a QCP applied to an energy flux monthly mean is codedwith the following quality flags:Flag  Meaning of Flagblank note yet controlled by the QCP1 judged to be erroneous by the GEBAclimatologist2 suspect of being afflicted with error bythe QCP: "flagged by the procedure"3 suspect of being not representative fora larger region by the QCP: "flagged bythe procedure"5 cannot be checked by the QCP: "notfound to be erroneous"6 "unflagged" by the climatologist withvery small probability of type 1 QCPerror7 or 8 found to be correct by the QCP:"passed the procedure"The following rules are used to calculate the quality flags:1. A QCP sets its associated character in a quality string according to thecodes in the above table. The climatologist may correct the outcome ofDataAvailability andExchangeThe GEBA data are availableat no cost for bona fideresearch.New users register byfilling in the registration formin the retrieve data menu.Institutions willing to offer datato the GEBA are kindly invitedto contact us.For commercial applications,write to Meteotest:Fabrikstrasse 14, CH-3012Bern, Switzerland oroffice@meteotest.chGlobal Energy Balance ArchiveDepartment of Environmental Systems Science Institute for Atmospheric and Climate Science2017-03-02, 22)54Flags – Global Energy Balance Archive | ETH ZurichSeite 2 von 2http://www.geba.ethz.ch/data-quality/flags.htmlPage URL: http://www.geba.ethz.ch/data-quality/flags.html02.03.2017© 2017 Eidgenössische Technische Hochschule Zürichthe QCP setting the character to 6 or 1.2. Upon inserting or changing an energy flux monthly mean in the GEBAdatabase, the first QCP is performed. Thus, every energy flux monthlymean has a quality string with the last character 1, 2, 6 or 8.3. The quality string of a yearly mean is the minimum of the quality stringsof the monthly means after the monthly strings have been converted tointegers.4. Upon deleting an energy flux monthly mean from the database, thequality string is deleted as well.Energy flux monthly or yearly mean retrieved from the GEBA database arewritten together with their quality strings to the GEBA energy flux file. Theinformation coded in its associated quality string should be taken intoaccount when an energy flux value is used.For example, integer quality values q, q1, q2, q3, ... are calculated byconverting the characters in the quality strings to integer values:q: all charactersq1: character no. 7q2: character no. 6, etc.q1 is thus the outcome of QCP no. 1, q2 of QCP no. 2, etc.With these values, conditions are written, e.g., if q1 >= 6 and q2 >= 6 andq3 >= 5, the energy flux value passed QCP nos. 1, 2 and 3 or passedQCPs nos. 1 and 2, but QCP no. 3 could not be applied.

The Global Energy Balance Archive (GEBA) - Description of formats

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