Data trends at meteoLCD: 1998 to 2007
Trends computed from yearly averages at meteoLCD,
Diekirch, Luxembourg.
Graphs may be freely copied and used, under the condition to cite:
Massen F.: Data trends at meteoLCD, 1998 to 2007. http://meteo.lcd.lu
Older trends are here!
Ground
Ozone [ug/m3] ("bad ozone") negative trend: -1.22 ug/m3 per year
mean : 41.0 ug/m3
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Total
Ozone Column [DU] ("good ozone") positive trend: + 4.2 DU per year calibration
factor applied if needed!
See [4] |
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CO2
mixing ratio in ppmV
The 1998-2001 data are too unreliable to be retained
for the trend analysis. For 2002-2007:
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Air
temperature [°C]
positive trend: + 0.07 °C per year
mean : 10.34 °C
Increase is smallest from 2006 to 2007. |
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Diurnal
Temperature Range (DTR) [°C]
See [5]
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Total
Yearly Rainfall [mm]
negative trend: - 31 mm per year
mean : 737.8 mm Note zig-zag
pattern! |
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Solar
energy on a horizontal plane
positive trend: + 0.06 kWh/m2 per year
mean: 1123 kWh/m2
Note practically flat trend! |
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Sunshine
duration (derived from pyranometer data by Olivieri's method) positive trend: + 25 hours per year mean: 1692 hours Trend would be +22 hours/year without |
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Biologically
eff. UVB dose on a horizontal plane in kWh/m2
positive trend: + 0.001 eff. kWh/m2 per year
mean: 0.131 eff. kWh/m2 Trend would be negative (-0.0003) without year 1998. |
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UVA
dose on a horizontal plane in kWh/m2
mean: 54 kWh/m2
Trend would be flat without year 1998. |
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NO
concentration in ug/m3
The 1998-1999 data are too unreliable to be retained. For 2000-2007: negative trend: -0.31 ug/m3 per year mean: 10.4 ug/m3 |
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NO2
concentration in ug/m3
The 1998-1999 data are too unreliable to be retained. For 2000-2007: mean: 22.2 ug/m3
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References:
1 | Europe's Environment 4th AR (2007) Fig. 2.2.3 http://reports.eea.europa.eu/state_of_environment_report_2007_1/en/Belgrade_EN_all_chapters_incl_cover.pdf |
2 | EPA: Ozone trends. http://www.epa.gov/airtrends/ozone.html |
3 |
Jonson et al: Can we explain the trends in European ozone levels? Atmos. Chem. Phys. Discuss., 5, 5957–5985, 2005. http://www.atmos-chem-phys-discuss.net/5/5957/2005/acpd-5-5957-2005.pdf |
4 | Ozone trends at Uccle http://ozone.meteo.be/ozone/trends.php |
5 | Rebetez, Beniston: Analyses of the elevation dependency of correlations between sunshine duration and diurnal temperature range this century in the Swiss Alps. 1998. |
file: meteolcd_trends.html
francis.massen@education.lu
last revision: 06 Jan 08 (16:00 UTC)