In line with the GAW Data Policy, users should contact the contributors of all data of interest and propose co-authorship or acknowledgement.
Organization
| NO | 3 |
|---|---|
| Acronym | AEMET |
| Name | State Meteorological Agency of Spain |
| Address 1 | Izana Atmospheric Research Center |
| Address 2 | C/ La Marina, 20, Planta 6, 38001 Santa Cruz de Tenerife, Spain |
| Address 3 | |
| Country/Territory | Spain |
| Website | http://izana.aemet.es/ |
Contact(s)
| Name | Emilio Cuevas |
|---|---|
| Prefix | Dr. |
| ecuevasa@aemet.es | |
| Organization No | 3 |
| Organization acronym | AEMET |
| Organization name | State Meteorological Agency of Spain |
| Organization country/territory | Spain |
| Address 1 | C/ La Marina, 20, Planta 6, 38001 Santa Cruz de Tenerife, Spain |
| Address 2 | |
| Address 3 | |
| Country/territory | Spain |
| Tel | +34-922-151718 |
| Fax | +34-922-574475 |
| Last updated date | 2023-06-30 |
| Name | Pedro Rivas |
|---|---|
| Prefix | Mr. |
| privass@aemet.es | |
| Organization No | 3 |
| Organization acronym | AEMET |
| Organization name | State Meteorological Agency of Spain |
| Organization country/territory | Spain |
| Address 1 | C/ La Marina, 20, Planta 6, 38001 Santa Cruz de Tenerife, Spain |
| Address 2 | |
| Address 3 | |
| Country/territory | Spain |
| Tel | +34-922-151718 |
| Fax | +34-922-574475 |
| Last updated date | 2023-06-30 |
| Background observation | |
| UTC | |
| ppb | |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: WMO CO X2014A |
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9999-12-31 00:00:00 - 2018-12-31 23:59:59: GC-RGA3, Trace Analytical(Gas chromatography (RGD)) 2019-01-01 00:00:00 - 9999-12-31 23:59:59: Picarro G2401 #2352-CFKADS2196(CRDS) |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: 30 (m) |
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| 30 seconds | |
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A potential response function relative to the working standard is used (so, the response function has two parameters to fit; the fitting is carried out applying least squares after taking logarithm). The working standard is injected every 20 minutes. Every two weeks, the relative potential response function of the instrument is obtained using five WMO standards since January 2008. Before, a variable number (three or four) of WMO standards was used. The working gas tank and the instrument is calibrated every two weeks against five carbon monoxide Izana primary standards (prepared by WMO GAW CO CCL). On July 2017, a re-submission of the full time series (2008-2016) was performed, because of two reasons: 1) the scale was updated from WMO-X2004 to WMO-X2014A, and 2) the drift in time of the 5 IZO laboratory standards was taken into account using the successive mole fraction assignments performed by NOAA to these laboratory standards. Mole fraction was reassigned taking into account the mentioned features and also the reassignments of mole fraction to the IZO CO old laboratory standards (used in 2008, the beginning of 2009 and the second half of 2014). [The following comment is for a previous version of the IZO CO data, and does not apply anymore.] On September 2015, a re-submission of the full time series (2008-2014) was performed, because mole fraction was reassigned taking into account the drift of one (CA06946) of the five IZO CO laboratory standards (used since 2009), and the reassignment of mole fraction to the IZO CO old laboratory standards (used in 2008). |
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| See References. | |
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[Hourly] RGA3: Hourly data are computed averaging the corresponding physical data for valid ambient injections. SD -> standard deviation of the sample (to compute the standard deviation of the mean, SD must be divided by sqrt(ND)) Picarro G2401: Hourly data are generated by arithmetic means from the 10 minutes means without including invalid data. SD: standard deviation of the sample (including the internal standard deviation of the 10 min means). ND: number of 10 minutes means used to compute the hourly mean. [Daily] The daily mean for the day "n" is computed averaging the corresponding available hourly means between 20:00 UTC of day "n-1" and 08:00 UTC of day "n" (so, they could be called "daily night means"). As explained in the paragraph "Sampling environment", the atmospheric conditions at the station during such hours are of pure free troposphere. SD: standard deviation of the sample of hourly means (without taking into account the internal SD of each hourly mean). ND: number of hourly means available for computing the daily night mean (max=12). [Monthly] Monthly data are computed averaging the corresponding daily night means (see paragraph "processing on daily data"). SD: standard deviation of the sample of daily night means (without taking into account the internal SD of each daily night mean). ND: number of valid daily night means used. |
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| No flags are used. Several procedures have been used to identify periods of malfunction of the instrumental system and the associated measurements have been discarded. | |
| Operational/Reporting | |
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To determine temporal variability of atmospheric CO at Izaña (North Atlantic free troposphere background conditions): short-term variability, seasonal variability and long-term trend. To provide data to WDCGG as a Global GAW station. The Izaña station is located at 2372.90 m above see level, on the Island of Tenerife, Spain. The ground in the vicinity around Izaña is loosely covered with light volcanic soil. The vegetation in the surrounding area is sparse, consisting mainly of broom. A belt of pine forest grows between 1000 and 2000 meters a.s.l. During nighttime (20UTC-08UTC), in situ measurements are representative of free troposphere background conditions. This is due to the following facts: a) usually a strong subtropical temperature inversion layer is located at a lower altitude than Izana station; b) Izana station is located on the top of a crest, so during the night period downslope wind produces (by mass conservation) the arrival of free troposphere air to Izana. During daytime, small amounts of air coming from the forest can arrive to the station due to surface upslope wind produced by ground diurnal heating. Apart from this effect, there is no arrival of polluted air from the rest of the island, due to the presence of the strong subtropical temperature inversion layer. The general ambient air inlet, which provides ambient air for all instruments that analyze it, is an 8cm inner diameter (ID) stainless steel pipe and has a high flow rate. This inlet is situated on top of the building tower; the height above the ground has changed through the years: 13 m (1984-2000), 8 m (2000- May 2005) and 30 m (from June 2005). Upstream of the GC sample loop (1 ml size), a cryocool trap is used to reduce the dew point of ambient air to -70 ºC. |
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Wind direction: 1 Wind speed: 1 Relative humidity: 1 Precipitation amount: 0 Air pressure: 0 Air temperature: 1 Dew point temperature: 0 Sea water temperature: 0 Sea surface water temperature: 0 Sea water salinity: 0 Sea surface water salinity: 0 |
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Meteorological data may remain as first provided, even when greenhouse gas data are updated. |
No DOI available
Related information
| Format | Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF | ||||
|---|---|---|---|---|---|
| Relation List (Is Part Of) |
All CO data contributed to WDCGG by GAW stations and mobiles by 2023-09-13 All CO data contributed to WDCGG by GAW stations and mobiles by 2022-09-05 All CO data contributed to WDCGG by GAW stations and mobiles by 2021-08-27 All CO data contributed to WDCGG by GAW stations and mobiles by 2020-09-28 All CO data contributed to WDCGG by GAW stations and mobiles by 2019-09-19 All CO data contributed to WDCGG by GAW stations and mobiles by 2018-10-25 |
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| Geolocation Point |
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GAW Data Policy
"For Scientific purposes, access to these data is unlimited and provided without charge.
By their use you accept that an offer of co-authorship will be made through personal contact with the data providers
or owners whenever substantial use is made of their data.
In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."
Citation format
This format is an example of the WDCGG standard citation.
Please follow the citation format which the data providers or owners indicate.
Please follow the citation format which the data providers or owners indicate.
Emilio Cuevas (AEMET),
Pedro Rivas (AEMET),
Atmospheric CO
at Izaña (Tenerife) by State Meteorological Agency of Spain
,
dataset published as CO_IZO_
surface-insitu_AEMET_data1 at WDCGG,
ver. 2023-06-30-1028 (Reference date*: YYYY/MM/DD)
* As the reference date, please indicate the date you downloaded the files.
* As the reference date, please indicate the date you downloaded the files.
Reference(s)
| 1 | Gomez-Pelaez, A. J., Ramos, R., Gomez-Trueba, V., Novelli, P. C., and Campo-Hernandez, R.: A statistical approach to quantify uncertainty in carbon monoxide measurements at the Izaña global GAW station: 2008-2011, Atmos. Meas. Tech., 6, 787-799, doi:10.5194/amt-6-787-2013, 2013 |
|---|---|
| 2 | Zellweger, C., M. Steinbacher, B. Buchmann, R. Steinbrecher (2015), System and Performance Audit of Surface Ozone, Methane, Carbon Dioxide, Nitrous Oxide and Carbon Monoxide at the Global GAW Station Izaña, September 2013. WCC-Empa Report 13/2 |
| 3 | Gomez-Pelaez, A.J., R. Ramos, V. Gomez-Trueba, R. Campo-Hernandez, E. Reyes-Sanchez: "GGMT-2015 Izaña station update: instrumental and processing software developments, scale updates, aircraft campaign, and plumbing design for CRDS" in GAW report (No. 229) of the "18th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (GGMT) (La Jolla, CA, USA, 13-17 September, 2015)", edited by P. Tans and C. Zellweger, World Meteorological Organization, 125-131,2016 |
