Data trends at meteoLCD: 1998 to 2008
Trends computed from yearly averages at meteoLCD,
Diekirch, Luxembourg.
Graphs may be freely copied and used, under the condition to cite:
MASSEN, Francis: Data trends at meteoLCD, 1998 to 2008. http://meteo.lcd.lu
Older trends are here!
Ground
Ozone [ug/m3] ("bad ozone") negative trend: -1.4 ug/m3 per year
mean : 39.9 ug/m3
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Total
Ozone Column [DU] ("good ozone") positive trend: + 4.5 DU per year calibration
factor applied if needed!
See [4] [8]
([8] shows strong |
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CO2
mixing ratio in ppmV
The 1998-2001 data are too unreliable to be retained
for the trend analysis. For 2002-2008:
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Air
temperature [°C]
positive trend: + 0.04 °C per year
mean : 10.34 °C
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Diurnal
Temperature Range (DTR) [°C] not yet updated to 2008!
See [5]
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. |
Total
Yearly Rainfall [mm]
negative trend: - 24 mm per year
mean : 736.8 mm |
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Solar
energy on a horizontal plane
negative trend: -3.2 kWh/m2 per year
mean: 1117 kWh/m2
Note strong negative trend
starting 2004! Is this a signature of the end of solar cycle 23 and the
much delayed solar cycle 24 ? |
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Sunshine
duration (derived from pyranometer data by Olivieri's method) positive trend: + 25 hours per year mean: 1673 hours Note strong negative trend from 2004 to 2008. Sunshine duration in 2008 is approx. 100 hours less than in 2004. |
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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: 0.130 eff. kWh/m2 Trend is negative (-0.0003) from 2004 to 2008. See [10] |
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UVA
dose on a horizontal plane in kWh/m2
positive trend: + 0.3 k Wh/m2 per year mean: 54 kWh/m2 Trend w/o 1998: -0.2 kW/(m2*y-1) Note strong negative trend from 2004 to 2008! |
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NO
concentration in ug/m3
The 1998-1999 data are too unreliable to be retained. For 2000-2008:: negative trend: -0.31 ug/m3 per year mean: 9.9 ug/m3 see [11] which gives ~30% reduction from 1990 to 2005 for the EU-15 countries. |
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NO2
concentration in ug/m3
The 1998-1999 data are too unreliable to be retained. For 2000-2008: mean: 22.6 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. |
6 | R.G. Vines, CSIRO: European rainfall patterns. International Journal of Climatology, vol.5, issue 6, p. 607-616. |
7 | http://global-warming.accuweather.com (15 Jan 2009). |
8 | J.W. Krzyscin, J.L.Borkowski: Total ozone trend over Europe: 1950 - 2004. ACPD, 8, 47-69, 2008. |
9 | NASA: Solar Physics: The Sunspot Cycle. |
10 | de Backer et al: ftp://ftp.kmi.be/dist/meteo/hugo/posters/20080630tromso_hdb.pdf (temporarly unavailable) |
11 | EEA: Emission trends of NOx 1990 - 2005 |
file: meteolcd_trends.html
francis.massen@education.lu
last revision:17 Jan 09