in Belgium techniques intercomparison and time series analysis R Van Malderen 15 E Pottiaux 25 H Brenot 35 S Beirle 4 C Hermans 3 M De Mazière 3 ID: 623119
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Slide1
The Integrated Water Vapour project in Belgium: techniques intercomparison and time series analysis
R. Van Malderen1,5, E. Pottiaux2,5, H. Brenot3,5, S. Beirle4, C. Hermans3, M. De Mazière3, T. Wagner4, H. De Backer1 and C. Bruyninx2,5
Royal Meteorological
Institute of Belgium
1
Royal Observatory of Belgium
2
Belgian Institute
for Space
Aeronomy
3
Max Planck Institute
for Chemistry
4
Solar-Terrestrial Centre of Excellence
5Slide2
GNSS4SWEC, WG3
Valencia, Spain16-17 October 2013IWV techniques intercomparison
total column
water vapour
GOME/SCIAMACHY/GOME-2
AIRS
CIMEL
sun
photometer
radiosondes
GPS (IGS)
satellite
ground-based
ROB
Techniques
intercomparison
NASASlide3
ROB
Techniques
intercomparison
GNSS4SWEC, WG3
Valencia, Spain
16-17
October
2013
s
election
of 28 sites world-
wide
(NH),
with
focus on CIMEL-GPS
co-location and based on
meteo data availability (GPS)!altitude correction between data (raw data, meteo data and IWV data)
gathered at sites with different altitudes!Slide4
GPS-CIMEL
GPS-RS9xGPS-GOMESCIA
ROB
GPS-AIRS
y
= 0.984x
bias
with
GPS ranges
between
-0.6 mm and +0.6 mm
R
2
= 0.993
Impact of
cloud
cover
???
Techniques
intercomparison
GNSS4SWEC, WG3
Valencia, Spain
16-17
October
2013
BrusselsSlide5
s
catter
plot
properties
for the 28
co-locations
,
ordered
with increasing latitute from
left to right
geographical dependency?
ROB
GPS -
CIMEL
GPS - RS
GPS - GOMESCIA
GPS - AIRS
GNSS4SWEC, WG3
Valencia, Spain
16-17
October
2013
Techniques
intercomparisonSlide6
s
catter
plot
properties
for the 28
co-locations
,
ordered
with increasing latitute from
left to right
geographical dependency?
ROB
GPS -
CIMEL
GPS - RS
GPS - GOMESCIA
GPS - AIRS
GNSS4SWEC, WG3
Valencia, Spain
16-17
October
2013
Techniques
intercomparisonSlide7
geographical
inconsistencies
Are
these
related with the chosen
database for meteorological
parameters (NCEPDOE)?
What are the ERA-interim
and GOME (2)/SCIAMACHY trends at these stations?
ROB
●
○
□
▪
IWV
↗
IWV
↗
significantly
IWV
↘
IWV
↘
significantly
Sensitivity analysis/trends
GNSS4SWEC, WG3
Valencia, Spain
16-17
October
2013
IWV trends for all IGS stations
starting
in 1995/1996