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 POPs in precipitation

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 on how sample is treated in the lab under “sample preparation “. Use special setup with information on combination of Soxhlet+Hexane+13C+Silica
  • Include information if been part of any relevant laboratory intercomparison in the QA measures
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:
lev2.nas

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
530 I Invalid due to too low or too high recovery
531 V Recovery anomaly, analysis inaccurate
532 V Data less accurate than normal due to high field blank value
540 I Spectral interference in laboratory analysis
549 I Impure chemicals
558 V Dust contamination, but considered valid
559 V Unspecified contamination or local influence, but considered valid
568 I Dust contamination, considered invalid
591 I Agricultural contamination, considered invalid
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
82 1001
Enge, Ellen Katrin; Nizzetto, Pernilla Bohlin
NO01L, Norwegian Institute for Air Research, NILU, , Instituttveien 18, , 2007, Kjeller, Norway
Våler, Rita
CAMP NILU EMEP
1 1
2018 01 01 2020 10 15
7.00
days from file reference point
11
1 1 1 1 1 1 1 1 1 1 1
99.99 999.9 9.999 9.9999 9.999 9.9999 9.999 9.99999 9.999 9.9999 9.999
end_time of measurement, days from the file reference point
precipitation_amount, mm, Analytical measurement technique=by_weight, Analytical instrument name=by_weight, Analytical instrument manufacturer=, Analytical instrument model=, Analytical instrument serial number=, Method ref=NO01L_by_weight, Detection limit=0.01 mm, QA1 measure ID=, QA1 date=
numflag precipitation_amount, no unit, Analytical measurement technique=by_weight, Analytical instrument name=by_weight, Analytical instrument manufacturer=, Analytical instrument model=, Analytical instrument serial number=, Method ref=NO01L_by_weight, Detection limit=0.01 mm, QA1 measure ID=, QA1 date=
HCB, ng/l
numflag HCB, no unit
PCB_101, ng/l
numflag PCB_101, no unit
PCB_180, ng/l
numflag PCB_180, no unit
gamma_HCH, ng/l
numflag gamma_HCH, no unit
0
57
Data definition: EBAS_1.1
Set type code: TU
Timezone: UTC
File name: NO0001R.20180104060000.20201015093000.bulk_sampler..precip.2w.1w.NO01L_NILU_bspop_01a.NO01L_NILU_GCMS.lev2.nas
Startdate: 20180104060000
Revision date: 20201015093000
Version: 1
Version description: initial revision, manually inspected
Statistics: arithmetic mean
Data level: 2
Period code: 2w
Resolution code: 1w
Sample duration: 1w
Station code: NO0001R
Platform code: NO0001S
Station name: Birkenes
Station WDCA-ID: GAWANO__BIR
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
Measurement height: 2.0 m
Regime: IMG
Component:
Unit: ng/l
Matrix: precip
Laboratory code: NO01L
Instrument type: bulk_sampler
Instrument name: NILU_bspop_01a
Instrument manufacturer: IVL
Instrument model: pop
Analytical laboratory code: NO01L
Analytical measurement technique: GC-HRMS
Analytical instrument name: NILU_GCMS
Analytical instrument manufacturer: Agilent
Analytical instrument model: 7200 Accurate Mass Q-TOF
Analytical instrument serial number: 12345
Method ref: NO01L_NILU_GCMS
Standard method: SOP=EMEP_manual_v2014
Sample preparation: liquid_extraction+cyclo-hexane+13C+Silica
Blank correction: Not blank corrected
Detection limit: 0.05 ng/l
Detection limit expl.: Lower quantification limit, determined by taking 10 times standard deviation of ensemble of laboratory blanks
Zero/negative values code: Zero/negative possible
Zero/negative values: Zero/negative values reported as measured if within detection limit, flagged with 147
QA1 measure ID: EMEP_AMAP_POP_2010
QA1 date: 20100701
Originator: Enge, Ellen Katrin, eke@nilu.no, Norwegian Institute for Air Research, NILU, Environmental Chemistry Department, Instituttveien 18, , 2007, Kjeller, Norway
Originator: Nizzetto, Pernilla Bohlin, pbn@nilu.no, Norwegian Institute for Air Research, NILU, Environmental Chemistry Department, Instituttveien 18, , 2007, Kjeller, Norway
Submitter: Våler, Rita, rlv@nilu.no, Norwegian Institute for Air Research, NILU, Monitoring and Instrumentation Technology Department, Instituttveien 18, , 2007, Kjeller, Norway
Comment:
starttime endtime mm flag_mm HCB flag_HCB PCB-101 flag_PCB-101 PCB-180 flag_PCB-180 gamma-HCH flag_gamma-HCH
3.25 10.25 47.3 0.000 0.0901 0.000 0.0051 0.000 0.00444 0.000 0.1670 0.000
10.25 17.25 43.3 0.000 0.0526 0.780 0.0066 0.000 0.00258 0.000 0.0319 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).