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Data Submission Manual
Submit DataReporting TemplatesTrace GasesInorganic air/aerosol chemistry (filter-based)    October 1, 2020

Template for inorganic air/aerosol chemistry (filter-based)

This format should be used for submitting all relevant inorganic components (sulphur, nitrogen, base cations and sea salt ions)
measured in air and aerosols with a filter-based system. Typically a three stage filterpack sampler (the EMEP reference method)
or a denuder system, but also chemical speciation of one filter systems like PM10 and PM2.5.

Points to note:

  • Report sum of nitrogen compounds, i.e. HNO3+NO3 and NH3+NH4 in addition to the concentration of the individual components
  • Include information on filter type(s) and coating solution(s).
  • Include information on both the sampling and analytical instruments
  • Include information on performance in laboratory intercomparison, i.e in EMEP and WMO/GAW for the respective year
  • Boundary and Spike Checks: Submitted data will be checked for boundaries, the current specification for boundary checks can be found here.

Downloading template as text file

You could download the template and start to modify the text with your own metadata. Due to limitations of the online portal we could not provide files with the .nas file extension. So please download the text file and edit, and remember to use the .nas file-extension when you create your datafile: 


* To validate the file, please use the EBAS Submission Tool

Flags commonly used with this format:

All the flags defined for EBAS can be used, and the data submitter is encourage to go through the list of all EBAS flags prior
to submitting to ensure that appropriate flagging is done. The most common flags for these measurements are:

Group 9: Missing flags

Flag Validity Description
999 M Missing measurement, unspecified reason

Group 7: Flags used when the value is unknown

Flag Validity Description
780 V Value below detection or quantification limit, data element contains estimated or measured value. Use of flag 147 is encouraged.
781 V Value below detection limit, data element contains detection limit

Group 6: Mechanical or instrumental problem

Flag Validity Description
651 V Agricultural activity nearby
652 V Construction/acitivity nearby
658 I Too small air volume
659 I Unspecified sampling anomaly
660 V Unspecified sampling anomaly, considered valid
662 V Too high sampling flow, data considered valid
663 I Too high sampling flow, data considered invalid
664 I Instrument flow(s) too far off target value, considered invalid
665 V Filter damaged, valid
666 I Filter damaged, invalid
668 V Moist or wet filter, valid
669 I Moist or wet filter, invalid

Group 5: Chemical problem

Flag Validity Description
555 V Pollen and/or leaf contamination, but considered valid
558 V Dust contamination, but considered valid
559 V Unspecified contamination or local influence, but considered valid
565 I Pollen and/or leaf contamination, considered invalid
568 I Dust contamination, considered invalid
591 I Agricultural contamination, considered invalid
599 I Unspecified contamination or local influence

Group 4: Extreme or inconsistent values

Flag Validity Description
410 V Sahara dust event
440 V Reconstructed or recalculated data
459 I Extreme value, unspecified error
460 I Contamination suspected

Group 0: Valid data

Flag Validity Description
000 V Valid measurement

Template for Data Reporting

118 1001
Aas, Wenche; Someone, Else
NO01L, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18, , 2007, Kjeller, Norway
Hjellbrekke, Anne
1 1
2015 01 01     2015 01 21
days from file reference point
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
999.999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999 999.99 9.999999999
end_time of measurement, days from the file reference point
ammonia, ug N/m3, Matrix=air, Medium=Cellulose, Coating/Solution=Oxalic acid, QA1 outcome=pass, QA1 bias=4%, QA1 variability=2%, QA2 outcome=pass, QA2 bias=6%, QA2 variability=4%, Detection limit=0.01 ug N/m3
numflag ammonia, no unit
ammonium, ug N/m3, Detection limit=0.01 ug N/m3, QA1 outcome=pass, QA1 bias=-1.8 %, QA1 variability=1.3 %, QA2 outcome=pass, QA2 bias=-2.2 %, QA2 variability=1.0 %
numflag ammonium, no unit
sum_ammonia_and_ammonium, ug N/m3, Matrix=air+aerosol, Medium=Teflon+cellulose, Coating/Solution=Oxalic acid, Detection limit=0.01 ug N/m3, QA1 measure ID=, QA1 date=, QA2 measure ID=, QA2 date=
numflag sum_ammonia_and_ammonium, no unit
nitric_acid, ug N/m3, Matrix=air, Medium=Cellulose, Coating/Solution=KOH, QA1 outcome=pass, QA1 bias=8%, QA1 variability=3%, QA2 outcome=pass, QA2 bias=6%, QA2 variability=2%, Detection limit=0.01 ug N/m3
numflag nitric_acid, no unit
nitrate, ug N/m3, Detection limit=0.01 ug N/m3, QA1 outcome=pass, QA1 bias=-0.1 %, QA1 variability=3.4 %, QA2 outcome=pass, QA2 bias=-0.3 %, QA2 variability=2.3 %
numflag nitrate, no unit
sum_nitric_acid_and_nitrate, ug N/m3, Matrix=air+aerosol, Medium=Teflon+cellulose, Coating/Solution=KOH, Detection limit=0.01 ug N/m3, QA1 measure ID=, QA1 date=, QA2 measure ID=, QA2 date=
numflag sum_nitric_acid_and_nitrate, no unit
sulphur_dioxide, ug S/m3, Matrix=air, Medium=Cellulose, Coating/Solution=KOH, QA1 outcome=no pass, QA1 bias=14%, QA1 variability=5%, QA2 outcome=pass, QA2 bias=4%, QA2 variability=5%, Detection limit=0.01 ug S/m3
numflag sulphur_dioxide, no unit
sulphate_total, ug S/m3, Detection limit=0.01 ug S/m3, QA1 outcome=pass, QA1 bias=-0.7 %, QA1 variability=0.3 %, QA2 outcome=pass, QA2 bias=-0.4 %, QA2 variability=0.7 %
numflag sulphate_total, no unit
calcium, ug/m3, QA1 outcome=no pass, QA1 bias=-27.1 %, QA1 variability=1.4 %, QA2 outcome=pass, QA2 bias=-3.1 %, QA2 variability=1.8 %
numflag calcium, no unit
chloride, ug/m3, QA1 outcome=pass, QA1 bias=-11.0 %, QA1 variability=3.0 %, QA2 outcome=pass, QA2 bias=-9.9 %, QA2 variability=2.9 %
numflag chloride, no unit
magnesium, ug/m3, QA1 measure ID=, QA1 date=, QA2 outcome=pass, QA2 bias=-0.5 %, QA2 variability=2.3 %
numflag magnesium, no unit
sodium, ug/m3, QA1 outcome=pass, QA1 bias=-5.1 %, QA1 variability=2.3 %, QA2 outcome= no pass, QA2 bias=-4.9 %, QA2 variability=22.1 %
numflag sodium, no unit
potassium, ug/m3, QA1 outcome=pass, QA1 bias=1.1 %, QA1 variability=1.3 %, QA2 outcome=pass, QA2 bias=1.3 %, QA2 variability=1.0 %
numflag potassium, no unit
Data definition:              EBAS_1.1
Set type code:                TU
Timezone:                     UTC
File name:                    NO0001R.20150101070000.20150121142400.filter_3pack.inorganics.aerosol.1y.1d.NO01L_NILU_f3p_d_0001.NO01L_NILU_IC_03.lev2.nas
Startdate:                    20150101070000
Revision date:                20150121142400
Version:                      1
Version description:          initial revision, manually inspected
Data level:                   2
Period code:                  1y
Resolution code:              1d
Sample duration:              1d
Orig. time res.:              1d
Station code:                 NO0001R
Platform code:                NO0001S
Station name:                 Birkenes
Station WDCA-ID:              GAWANO__BIR
Station GAW-Name:             Birkenes Atmospheric Observatory
Station GAW-ID:               BIR
Station AIRS-ID:             
Station other IDs:            201(NILUDB)
Station state/province:      
Station land use:             Forest
Station setting:              Rural
Station GAW type:             R
Station WMO region:           6
Station latitude:             58.383333
Station longitude:            8.250000
Station altitude:             190m
Measurement altitude:         200m
Measurement height:           2m
Component:                    inorganics
Unit:                         ug/m3
Matrix:                       aerosol
Laboratory code:              NO01L
Instrument type:              filter_3pack
Instrument manufacturer:      NILU
Instrument model:             Three stage open face
Instrument name:              NILU_f3p_d_0001
Instrument serial number:     9635
Analytical laboratory code:   NO01L
Analytical measurement technique: IC
Analytical instrument manufacturer: Dionex
Analytical instrument model:  ICS-3000
Analytical instrument name:   NILU_IC_03
Analytical instrument serial number:  12345
Standard method:              SOP=EMEP_manual_v1996
Inlet type:                   Hat or hood
Inlet description:            Downward facing
Flow rate:                    17.4 l/min
Humidity/temperature control: None
Humidity/temperature control description: filter kept at ambient conditions together with sampling head.
Medium:                       Teflon
Sample preparation:           Water extraction after ultrasonic treatment
Blank correction:             Blank corrected
Volume std. temperature:      ambient
Volume std. pressure:         ambient
Detection limit:              0.01 ug/m3
Detection limit expl.:        Determined by taking 3 times standard deviation of ensemble of field blanks
Zero/negative values code:    Zero/negative possible
Zero/negative values:         Zero/negative values reported as measured if within detection limit, flagged with 780
QA1 measure ID:               EMEP31
QA1 date:                     20131016
QA1 outcome:                 
QA1 bias:             
QA1 variability:             
QA2 measure ID:               EMEP32
QA2 date:                     20141022
QA2 outcome:                 
QA2 bias:             
QA2 variability:             
Originator:                   Someone, Else,, Some nice Institute, WOW, Super interesting division, Street 18,, X-9999, Paradise, Noway
Submitter:                    Hjellbrekke, Anne,, Norwegian Institute for Air Research, NILU, Atmosphere and Climate Department, Instituttveien 18,, 2007, Kjeller, Norway
Acknowledgement:              Request acknowledgement details from data originator
starttime endtime NH3 numflag_NH3 NH4+ numflag_NH4+ NH3+NH4 numflag_NH3+NH4 HNO3 numflag_HNO3 NO3- numflag_NO3- HNO3+NO3 numflag_HNO3+NO3 SO2 numflag_SO2 SO4-- numflag_SO4-- Ca++ numflag_Ca++ Cl- numflag_Cl- Mg++ numflag_Mg++ Na+ numflag_Na+ K+ numflag_K+
  0.291667    1.291667     0.05   0.781000000   0.21   0.000000000   0.24   0.000000000   0.02   0.781000000   0.05   0.000000000   0.06   0.000000000   0.05   0.000000000   0.06   0.000000000   0.03   0.000000000   0.02   0.781000000   0.04   0.000000000   0.03   0.000000000   0.12   0.000000000
  1.291667    2.291667     0.05   0.781000000   0.24   0.000000000   0.27   0.000000000   0.02   0.781000000   0.07   0.000000000   0.08   0.000000000   0.06   0.000000000   0.39   0.000000000   0.01   0.781000000   0.33   0.000000000   0.01   0.781000000   0.03   0.000000000   0.04   0.000000000
  2.291667    3.291667   999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000 999.99   0.999000000
  3.291667    4.291667     0.07   0.000000000   0.09   0.000000000   0.16   0.000000000   0.02   0.781000000   0.16   0.000000000   0.17   0.000000000   0.02   0.781000000   0.58   0.000000000   0.01   0.781000000   0.10   0.000000000   0.01   0.781000000   0.01   0.781000000   0.01   0.000000000


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