Data trends at meteoLCD


This page with the 9 year trends will be populated in the coming weeks; the trends, mean and standard deviations are computed from the original data series.

 

Ground Ozone [ug/m3]
("bad ozone")

mean : 41.13 ug/m3
stdev:  34.50

mean of daily max   =   76.5 +/- 38.4
daily max. variation = - 4 (1998-2006)

Air temperature [C]

mean : 10.25 C
stdev:    7.61


As the sensor has been moved several times, this trend should be taken with caution!

Diurnal Temperature             
Range (DTR)  [C]

DTR = daytimeMAX-nighttimeMIN
daytime = 08:00 - 20:00 UTC
DTR mean :               7.81 +/- 4.58
daytimeMAX mean: 14.37 +/- 8.34
trend:                      +0.15 C/year
nighttimeMIN mean:   6.58 +/- 6.03
trend:                      +0.03 C/year

If DTR is computed as the difference between the diurnal (i.e. 24 hours) Max and Min the trend is +0.08 C/year
Total Ozone Column [DU]
("good ozone")

positive trend + 3 DU/year

mean : 323.2  DU
stdev :   12.4  DU

Total Yearly Rainfall [mm]

 

mean : 744.4 mm
stdev : 163.7 mm

Solar energy on a     horizontal plane

 

 

mean: 1127 kWh/m2
stdev:    52  kWh/m2

Sunshine duration
(derived from pyranometer data by Olivieri's method)

 

mean: 1655 hours
stdev:   200 hours

Biologically eff. UVB dose on a horizontal plane in kWh/m2

 

mean:  0.131 eff. kWh/m2
stdev:  0.012 eff. kWh/m2

 

UVA dose on a horizontal plane in kWh/m2

 

mean:  54 kWh/m2
stdev:    5 kWh/m2

CO2 mixing ratio in ppmV

The 1998-2001 data are too unreliable to be retained.

For 2002-2006:

mean: 403.8 ppm
stdev:     3.6 ppm

 

NO concentration in ug/m3

The 1998-1999 data are too unreliable to be retained.

For 2000-2006:

mean: 10.5 ug/m3
stdev:   1.0 ug/m3

NO2 concentration in ug/m3

The 1998-1999 data are too unreliable to be retained.

For 2000-2006:

mean: 22.1 ug/m3
stdev:   1.8 ug/m3

 

 

 

  

 


file: meteolcd_trends.html

francis.massen@education.lu
last revision: 14 Jun 07 (19:13 UTC)