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Jarczew
-NO2-
| Observation |
| Category |
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Air sampling observation |
| Situation |
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ongoing |
| Time zone |
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UTC |
| Sampling |
| Sampling height |
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+2.2 |
| Description |
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continuous |
| Sampling and analysis frequency |
: |
Sampling is done in daily intervals. |
| Sampling environment |
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Located in agricultural lowland region the station is surrounded by farming fields, meadows and woods.
A local road with medium vehicular traffic is situated 110m to the north of station.
The sources are located as follows:
- "Kozienice" Power Station 40km to SW direction,
- "Pulawy" Artificial Fertilisers Factory 40km to S direction,
- Pulawy, town with 50 thousand inhabitants, 40km to S direction,
- Warsaw, capital of Poland (2 million inhabitants) 90km to NW direction.
The prevailing winds are from W and SW directions.
In 2009 and 2010 the prevailing winds were from E and NE directions.
In 2011 and 2012 were again from NW and SW directions, in 2013 the prevailing winds were from N, NE, E and in 2014 this directions were from S, SE.
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| Description for sampling analysis |
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A manual low-volume sampler for NO2 measurement is used. Sampling inlet has quadratic cross-section. It is made of PE and mounted at the height of 2.2m above the ground level.The total length of teflon tubing (ID=6mm) is 2.7m. The air flow rate is 0.5l/min and total volume of daily sample amounts to 0.7m3.
A precision wet gas meter was used for measuring the sampled air volume until May 1994. Since then the air flow rate has been adjusted with use of a mass flow rate controller (ERG1000) calibrated by the producer once a year. Absorption efficiency is 80%.
The collected daily samples are stored in a refigerator.
Analyses are performed in monthly series. |
| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (VIS) |
| Current status and history of instrument |
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Spectrophotometer Spekol 10 made by Carl Zeiss, Jena (German Democratic Republic) was used in period 1985-1988.
Spectrophotometer Spekol 11 made by Carl Zeiss, Jena (German Democratic Republic) was used in period 1989-1995.
Since then spectrophotometer made by Hitachi, model U-1100,serial no. 0691-010 has been used. |
| Description of instrument |
: |
Spectrophotometer made by HITACHI, model U-1100 enables to achieve:
- analytical precision expressed as relative standard deviation (RSD):
1% at 0.304mgN-NO2/l
5.9% at 0.015mgN-NO2/l
- analytical detection limit: 0.008mgN-NO2/l
- measurement detection limit: 0.2µgN-NO2/m3 |
| Calibration |
| Current scale employed in the measurement |
: |
Scale of standards is prepared at the IMWM laboratory for each monthly series of daily samples. |
| Measurement calibration |
: |
Spectrophotomerical analytical method is calibrated with use of standard nitrite solutions having the concentrations in the range of 0.0 - 1.5µgNO2/ml when each monthly series of collected daily samples is analysed. The calibration curve includes from 8 to 10 points.
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| Scale and calibration(treasability) |
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Daily NO2 samples are taken at the regional background air pollution monitoring station. The NO2 concentration values measured at central laboratory are below 50µgNO2/m3. Annual mean NO2 concentration calculated from the daily averages is much below 40µgNO2/m3, i.e. the admissible value adopted in the disposition by the Ministry of the Environment (August 2012) as regards health protection.
Participation in the EMEP field intercomparison of methods for measuring NO2 at Kleiner Feldberg, Germany (1991).
Taking part in yearly EMEP laboratory intercomparisons of NO2 determination in several samples of synthetic aqueous solutions prepared by EMEP/CCC/NILU, Norway.
The detailed information and data on the quality assurance/quality control are presented on website:
www.nilu.no/projects/ccc/qa/index.htm
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| Data Processing |
| Measurement unit |
: |
µg/m3-20C, 1013hPa |
| Data processing |
: |
When the measured NO2 concentration is beyond the upper limit of the liner range of the calibration curve, the sample is appropriately diluted and reanalysed.
The raw daily data are stored in the data book and the data acquisition system.
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| Processing for averaging |
: |
Processing for Daily Data:
If the measured value is below the measurement detection limit, i.e. 0.2µgN-NO2/m3, the half of this value is assumed.
Then the data are correlated with the meteorological data and with the information from the station logbook and other sources.
All incorrect and invalid daily data are rejected and marked in accordance with the appropriate codes contained in Data Reporting Manual of the WMO WDCGG (No.1), January 1991.
Processing for Monthly Data:
Arithmetic mean monthly values are calculated from valid daily data and are marked according to the appropriate codes for validation contained in Data Reporting Manual of the WMO WDCGG (No.1), January 1991. |
| Data flag |
: |
Flags specified by WDCGG in Data Reporting Manual (WDCGG No1, January 1991) are used. |
| Data remarks |
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| Other Information |
| Scientific aim |
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To provide data for research and study to reveal long term trends in background NO2 concentrations in Poland in the framework of EMEP programme.The data are also used for the Polish State Environmental Monitoring System. |
| Reference |
: |
-"The EMEP Monitoring Strategy 2010-2019".
- EMEP Manual for Sampling and Chemical Analysis, EMEP/CCC-Report 1/95, O-7726, Norwegian Institute for Air Research
-web site addresses:
www.emep.int/emep_title.html
www.nilu.no/projects/ccc/index.html
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| submitted by Institute of Meteorology and Water Management |
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