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Marambio
-O3-
| Observation |
| Category |
: |
Air sampling observation |
| Situation |
: |
ongoing |
| Time zone |
: |
UTC |
| Sampling |
| Sampling height |
: |
5 |
| Description |
: |
continuous |
| Sampling and analysis frequency |
: |
Continuous, measuring interval is 10 seconds (7 seconds flushing and 3 seconds integrating time). |
| Sampling environment |
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Marambio (the main Argentine station in Antarctica) is located in Seymour/Marambio ice-free Island, on the north-east side of the Antarctic Peninsula.
The average temperatures at the site are -1.5 °C during the summer, and −15 °C during winter, though strong winds can lower the apparent temperature down to −60 °C.
Prevailing winds are from the N-NW and S-SW, with a current average of 8.4 ms-1.
Possible sources are the power plant and the runway airplane located to the SW and N respectively.
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| Description for sampling analysis |
: |
Sampling and Analyses Intake height: 5 m above ground on top of the station building.
Inlet/Manifold: from there connections ozone instruments by PFA tubing, length approx. 3 m to instrument.
Total flow rate 1.5 liter per minute
Teflon inlet filter before analyzer, exchanged monthly.
Residence time in the sampling line: approx. 2 s
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| Instrument and Analysis |
| Measurement method |
: |
Light absorption analysis (UV) |
| Current status and history of instrument |
: |
TEI 49 #47306-278
Daily standard gas addition (1994-1997)
System and performance audit conducted by WMO - IFU November 1994.
System and performance audit conducted by WMO - EMPA November 1998.
System and performance audit conducted by WMO - EMPA November 2008.
Intercomparison at the Regional Calibration Centre for Surface Ozone (RCC-BsAs) by WCC-Empa in 2006 and 2010.
TEI49 (Thermo Environmental Instruments Inc.) worked since Dec. 1994 – to Nov. 2010 in Ushuaia GAW Station.
Since Oct. 2011 is working in Marambio Station.
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| Description of instrument |
: |
TEI 49 characteristics:
Internal ozone generator
Range: 0-100 ppb
Precision: 0.002 ppm
Linearity: ± 0.001 ppm
Noise: ± 0.001 ppm
Minimum detectable: Limit 0.002 ppm
Response Time: (0 to 95%) 20 seconds
Lag time: 10 seconds
Flow Rate: 1 – 3 liters per minutes
Analog output: 0-10 V |
| Calibration |
| Current scale employed in the measurement |
: |
Travelling standard, traceable to NIST |
| Measurement calibration |
: |
Intercomparison at the Regional Calibration Centre (RIII WMO) for Surface Ozone (RCC-BsAs) by WCC-Empa in 2006 and 2010. |
| Scale and calibration(treasability) |
: |
The data refer to the WCC O3 standard.
Absolute scale, ppb. |
| Data Processing |
| Measurement unit |
: |
ppb |
| Data processing |
: |
The data are processed according a statistical criteria.
If the variance is between 0 and 3, the value is correct.
If the variance is higher, the value is invalid. |
| Processing for averaging |
: |
Processing for Hourly Data:
The hourly mean value is calculated as the arithmetic mean value of the samples taken every 1 minutes.
Processing for Daily Data:
The daily value is calculated as the arithmetic mean value of the 24 hourly values taken during the day.
Processing for Monthly Data:
The monthly values are calculated as the arithmetic mean value of the days for that month. |
| Data flag |
: |
Flag 0– Valid data.
Flag 1- Invalid data |
| Data remarks |
: |
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| Other Information |
| Scientific aim |
: |
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| Reference |
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| submitted by National Weather Service |
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