geomon

Global Earth Observation and Monitoring
of the atmosphere


Station Report Card for Preila (LT15)

Site Identity

Name:Preila
GEOmon ID:LT15
EMEP ID:LT15
GAW ID:PLA
Longitude:21.067 (°E)
Latitude:55.350 (°N)
Altitude: 5 (m) above sea level
Fig.: Location of Site

Measurements

The GEOmon activity 2.1 focuses on surface observations of ozone, nitrogen dioxide and carbon monoxide. At most stations presented here, measurements of several other trace gases and aerosol parameters are also available but are not listed here. Refer to GAWSIS for more information on other parameters.

The complete set of preliminary harmonized data can be downloaded here: (hourly, daily data, data description).
Data of the site Preila can be downloaded here: (hourly, daily data, data description)
Ozone Measurements
Height of O3 inlet:3 (m) Length of O3 sample line:2 (m)
O3 sampling method:Continuous O3 analysis method:UV-Absorption
O3 sampling interval:Not available
O3 calibration with NIST standard:1 year(s) Location of used NIST standard:CHMI
First measurement in dataset:1993-01-01 00:00 Last measurement in dataset:2005-12-31 00:00
Data coverage: 86.7 (%) Data source/provider: EMEP
(status: 2008-05-09)
Comments:None

Nitrogen Dioxide Measurements
Height of NO2 inlet:3 (m) Length of NO2 sampling line:2 (m)
NO2 sampling method:NaI impregnated glass frit NO2 analysis method:Photometrically by the Griess method
NO2 sampling frequency:
NO2 calibration with primary standard:Not available
First measurement in dataset:1991-01-01 00:00 Last measurement in dataset:2003-12-31 00:00
Data coverage: 94.7 (%) Data source/provider: EMEP
(status: 2008-05-09)
Comments:None

Carbon Monoxide Measurements
Not available.

Fig.: Overview of available measurements (daily data)

Surroundings 10 km

Median altitude: 0 (m) a.s.l. Standard deviation of altitude: 7 (m)
Site Altitude: 5 (m) a.s.l. Terrain below site: 50.0 (%)
Total population: 6831 Standard deviation of population: 159
Mean population density: 20 (km-2) Standard deviation of population density: 13 (km-2)
Local population density: 29.5 (km-2)
Dominating Land Cover Types:
Water Bodies (natural & artificial) (20) 84.9 (%)
Tree Cover, needle-leaved, evergreen (4) 13.2 (%)
Tree Cover, mixed leaf type (6) 1.1 (%)
Herbaceous Cover, closed-open (13) 0.4 (%)
 
Mean O3 deposition velocity: 0.13 (cm s-1) Standard deviation of O3 deposition velocity: 0.19 (cm s-1)
Fig.: Topography Fig.: Population
 
Fig.: Land Cover

Surroundings 50 km

Median altitude: 0 (m) a.s.l. Standard deviation of altitude: 16 (m)
Site Altitude: 5 (m) a.s.l. Terrain below site: 49.0 (%)
Total population:316791 Standard deviation of population: 2379
Mean population density: 39 (km-2) Standard deviation of population density: 196 (km-2)
Local population density: 29.5 (km-2)
Dominating Land Cover Types:
Water Bodies (natural & artificial) (20) 59.5 (%)
Cultivated and managed areas (16) 17.5 (%)
Mosaic: Cropland / Shrub or Grass Cover (18) 4.7 (%)
Tree Cover, broadleaved, deciduous, closed (2) 4.6 (%)
 
Mean O3 deposition velocity: 0.37 (cm s-1) Standard deviation of O3 deposition velocity: 0.40 (cm s-1)
Fig.: Topography Fig.: Population
 
Fig.: Land Cover

12 hour Catchment Area

Mean radius: 142 (km) Standard deviation radius: 23 (km)
Equivalent radius: 144 (km) Circularity: 0.60
Total area: 65470 (km2) Total residence time: 19.8 (%)
Maximal radius: 183 (km) Minimal radius: 123 (km)
Maximal radius direction:W Minimal radius direction:NE
Average population density: 29 (km-2) Standard deviation of population density: 110 (km-2)
 
Dominating Land Cover Types:
Water Bodies (natural & artificial) (20) 57.9 (%)
Cultivated and managed areas (16) 20.5 (%)
Mosaic: Cropland / Shrub or Grass Cover (18) 4.6 (%)
Tree Cover, needle-leaved, evergreen (4) 4.4 (%)
 
Average O3 deposition velocity: 0.39 (cm s-1) Standard deviation of O3 deposition velocity: 0.38 (cm s-1)
Catchment area derived from:FLEXPART nest
Fig.: Surface Footprint and Catchment Area , EuropeFig.: Surface Footprint Catchment Area , North Atlantic Region

24 hour Catchment Area

Mean radius: 305 (km) Standard deviation radius: 63 (km)
Equivalent radius: 309 (km) Circularity: 0.41
Total area:300738 (km2) Total residence time: 37.0 (%)
Maximal radius: 413 (km) Minimal radius: 248 (km)
Maximal radius direction:W Minimal radius direction:NE
Average population density: 35 (km-2) Standard deviation of population density: 113 (km-2)
 
Dominating Land Cover Types:
Water Bodies (natural & artificial) (20) 51.1 (%)
Cultivated and managed areas (16) 23.2 (%)
Tree Cover, needle-leaved, evergreen (4) 5.8 (%)
Mosaic: Cropland / Shrub or Grass Cover (18) 5.3 (%)
 
Average O3 deposition velocity: 0.44 (cm s-1) Standard deviation of O3 deposition velocity: 0.39 (cm s-1)
Catchment area derived from:FLEXPART nest
Fig.: Surface Footprint and Catchment Area , EuropeFig.: Surface Footprint Catchment Area , North Atlantic Region

48 hour Catchment Area

Mean radius: 570 (km) Standard deviation radius: 114 (km)
Equivalent radius: 576 (km) Circularity: 0.27
Total area:1041580 (km2) Total residence time: 60.7 (%)
Maximal radius: 789 (km) Minimal radius: 438 (km)
Maximal radius direction:W Minimal radius direction:NE
Average population density: 45 (km-2) Standard deviation of population density: 150 (km-2)
 
Dominating Land Cover Types:
Water Bodies (natural & artificial) (20) 43.3 (%)
Cultivated and managed areas (16) 27.0 (%)
Tree Cover, needle-leaved, evergreen (4) 7.8 (%)
Tree Cover, mixed leaf type (6) 5.5 (%)
 
Average O3 deposition velocity: 0.50 (cm s-1) Standard deviation of O3 deposition velocity: 0.38 (cm s-1)
Catchment area derived from:FLEXPART nest
Fig.: Surface Footprint and Catchment Area , EuropeFig.: Surface Footprint Catchment Area , North Atlantic Region


Please contact Stephan Henne in case of any questions.