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Monte Cimone
-SO2-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
Local time +1 |
| Sampling |
| Sampling height |
: |
7 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuously on a 1-minute time basis. |
| Sampling environment |
: |
Mountain peak with completly free horizon.
No local sources of contamination. No access by road.
Timberline about 300m below the measurement site. |
| Description for sampling analysis |
: |
The air is sampled by a 2m long heated intake at 7 m height above
the ground with a flux of 40 l/s. The air intake is composed by an external (outside building) steel pipe (internally covered by Teflon) and the internal (inside building) Pyrex pipe. A Teflon sampling line (lenght 1.5m) connects the air intake with analysers. |
| Instrument and Analysis |
| Measurement method |
: |
UV fluorescence |
| Current status and history of instrument |
: |
Since 2014, March: 43i TLE (Thermo Scientific) |
| Description of instrument |
: |
UV fluorescence: Thermo Scientific 43i TLE
The instruments undergo instrument tests (i.e. detection limit evaluation) after first receipt. In operation, the instrument is regularly maintaned on-site following the standard operation procedures. Daily, monthly and yearly data quality checks are carried out at the Institute laboratories. |
| Calibration |
| Current scale employed in the measurement |
: |
provisional |
| Measurement calibration |
: |
Automatic zero and span checks every 49 hrs by using a certified permeation tube (emission rate 44 ng/min ± 10%) as span source. |
| Scale and calibration(treasability) |
: |
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| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
Quality assurance procedures involve time series plots, daily checks of internal parameters, zero evaluation, consistency checks with other tracers and meteorological data.
Hourly mean values were calculated if 75% of 1-minute data are available.
Daily mean values were calculated if 75% of hourly data are available.
Monthly mean values were calculated if 75% of hourly data were available.
Data below the detection limit (0.11 ppb on 1-minute) were retained for the averaging processes.
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| Processing for averaging |
: |
Processing for Hourly Data:
Hourly mean values were calculated if 75% of 1-minute data are available.
Data below the detection limit (0.11 ppb on 1-minute) were retained for the averaging processes.
Processing for Daily Data:
Obtained by averaging all available hourly data. Daily mean values were calculated if 75% of hourly data are available.
Processing for Monthly Data:
Obtained by averaging all available daily data. Monthly mean values were calculated if 75% of daily data were available. |
| Data flag |
: |
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| Data remarks |
: |
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| Other Information |
| Scientific aim |
: |
Atmospheric pollution studies. Volcanic plume tracing. NRT data provision. |
| Reference |
: |
Summer report of the Italian Climate Observatory "O. Vittori" at Mt.Cimone – n.6. Issued: February 2015, rev. 1
The report is published quarterly. Download at: http://www.isac.cnr.it/cimone/reports. ISSN: 2283-9631 |
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| submitted by National Research Council, Institute of Atmospheric Sciences and Climate |
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