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 submission of ozone measurements
This template should be used for submitting monitoring data of surface ozone done by standard photometers based on UV absorption.
Points to note
Mixing ratio given as [nmol/mol] is the preferred unit. Alternatively [ppb] could be used, assuming this is identical to [nmol/mol]. Data in [proxy ug/m3] = fac × [nmol/mol] is also accepted provided that the fixed values for T and P (typically T=293.15K and P = 1013.25 hPa) used to calculate fac is given in the "Volume std. temperature" and "Volume std. pressure" metadata.
A default standard value for the absorption cross-section is stated in the "Absorption cross section" element. As data provider you should check that this agrees with the value you are using and change it if needed
Include information of monitor calibration(s) in the QA metadata
Include information on filter test, leak tests, ozone scrubber test etc in the "Maintenance description" element
Include information of any kind if drying in the Temperature/humidity control tab. This is important for the question of whether the values refer to mixing ratio in moist or dry air
When calculating average values, e.g. hourly, from measurements with higher time resolution, please disregard any invalid measurements. Any informative flags, e.g. local contamination, occuring at any time during the average period need to be copied to the average value.
Reference temperature and pressure are only necessary to include when reporting mass concentration.
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:
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
valid data, no flag
Group 1: Exception flags for accepted, irregular data
Episode data checked and accepted by data originator. Valid measurement
Below theoretical detection limit or formal Q/A limit, but a value has been measured and reported and is considered valid
Group 3: Flags for aggregated datasets
Data completeness less than 50%
Data completeness less than 75%
Data completeness less than 90%
Group 5: Chemical problem
Unspecified contamination or local influence, but considered valid
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).