The example template given below contains the metadata fields that are commonly included when reporting data related to this specific template. Some of these metadata elements may not be relevant for your data reporting, like AIRS station ID for stations outside North America or the various QA measure data when there is no QA measure for the data. Such metadata elements could be let out. If you want to include additional metadata elements that are not given in the example template, there is a complete list here.  In case of any doubt about such additional metadata, please consult the EBAS team!

Template for Mercury in precipitation (draft)

This format should be used for submitting all relevant persistent organic pollutants (POPs) measured in precipitation

Points to note

  • Report precipitation amount from the wet only or bulk)sampler and the co-located official meteorological rain gauge when available.

  • For days without rain, set value to 0.00/flag to 000 for precipitation amount, and value to missing/flag to 890 for the compound.

  • This template can be used for total deposition measurements also, then use matrix precp+dry_dep. NOTE. If however concentration has been measured, this should be reported together with precipitation

  • Include information on both the sampling and analytical instruments.

  • Include information if been part of any relevant laboratory intercomparison in the QA measures. 

  • Boundary and Spike Checks: Submitted data will be checked for boundaries, the current specification for boundary checks can be found here.
Downloading template as nasaames file

Please download the .nas file and edit, and remember to keep the .nas file-extension when you create your datafile:

Validation and submission:

To validate the file, please use the EBAS Submission Tool

Flags commonly used with this format:

The three main types of flags in EBAS are:

  • V (valid measurement): indicate a special condition at the station, but instrument has operated correctly, the data are therefore considered valid.
  • I (invalid measurement): showing that data are not available (not measured, deleted or if it is no precipitation)
  • M (missing measurement): mainly used for level 0 data to be able to exclude these data when being reprocessed to level 1 and level 2

For data harmonization across the network, the following short list of the flags should be used with this template. It is possible to use several flags at the same time to give detailed information about the data.

Group 0: Valid data
Flag Validity Description
000 V valid data, no flag
Group 1: Exception flags for accepted, irregular data
Flag Validity Description
147 V Below theoretical detection limit or formal Q/A limit, but a value has been measured and reported and is considered valid
Group 4: Extreme or inconsistent values
Flag Validity Description
460 I Contamination suspected
Group 5: Chemical problem
Flag Validity Description
559 V Unspecified contamination or local influence, but considered valid
599 I Unspecified contamination or local influence
Group 6: Mechanical or instrumental problem
Flag Validity Description
656 V Wet-only collector failure, operated as bulk collector
657 V Precipitation collector overflow. Heavy snowfall/rain shower (squall)
Group 7: Flags used when the value is unknown
Flag Validity Description
781 V Value below detection limit, data element contains detection limit
782 V Low precipitation, concentration estimated
783 M Low precipitation, concentration unknown
Group 8: Flags for undefined data elements
Flag Validity Description
890 M Concentration in precipitation undefined, no precipitation
Group 9: Missing flags
Flag Validity Description
999 M Missing measurement, unspecified reason
53 1001
Aspmo, Katrine
NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway
Aspmo, Katrine
CAMP EMEP_preliminary NILU
1 1
2019 01 01 2020 03 18
days from file reference point
1 1 1
99 999 9.999
end_time of measurement, days from the file reference point
mercury, ng/l
numflag mercury, no unit
Data definition: EBAS_1.1
Set type code: TI
Timezone: UTC
File name: NO0001R.20190101000000.20200318000000.bulk_sampler.mercury.precip.1mo.12d.NO01L_bs_hg_01.NO01L_cvafs.lev2.nas
Startdate: 20190101000000
Revision date: 20200318000000
Statistics: arithmetic mean
Data level: 2
Period code: 1mo
Resolution code: 12d
Station code: NO0001R
Platform code: NO0001S
Station name: Birkenes
Station GAW-ID: BIR
Station GAW-Name: Birkenes Atmospheric Observatory
Station other IDs: 201(NILUDB)
Station land use: Forest
Station setting: Rural
Station GAW type: R
Station WMO region: 6
Station latitude: 58.383333
Station longitude: 8.25
Station altitude: 190.0 m
Regime: IMG
Component: mercury
Unit: ng/l
Matrix: precip
Laboratory code: NO01L
Instrument type: bulk_sampler
Instrument name: bs_hg_01
Method ref: NO01L_cvafs
Originator: Aspmo, Katrine, , Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway
Submitter: Aspmo, Katrine, , Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway
starttime endtime Hg flag_Hg
0 31 14 0.000

This service has been funded or supported by the Norwegian Institute for Air Research (NILU), the EU research infrastructure ACTRIS (Aerosols, Clouds, and Trace gases Research InfraStructure), the European Monitoring and Evaluation Programme (EMEP).