Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk-11-13 March 2004 COST723-WG1- Working Group I: Data and Measurement Techniques Overview Herman G.J.

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Presentation transcript:

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 COST723-WG1- Working Group I: Data and Measurement Techniques Overview Herman G.J. Smit Research Centre Jülich, Institute for Chemisty and Dynamics of the Geosphere: Troposphere (ICG-II), P.O. Box 1913, Juelich, Germany ( Objectives WG1: Collecting of observational data of key parameter Data access Assessment of data & techniques of observations

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 COST723-WG1: Collecting of data of key parameter (1) Key parameter are ??? Identification (September 2001) of: Humidity Ozone Temperature Pressure Elaborate at this Workshop with requirements from WG 2&3

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 COST723-WG1: Collecting of data of key parameter (2) Observation platforms are ??? Ground based: Balloon sondes Remote sensing Set up Inventory at this Workshop Aircraft: In-situ Remote sensing Satellites: Remote sensing

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 Data access already on-line available??? On-line available: Documentation data access Not on-line available: Create data base for on-line access Elaborate at this Workshop Data Protocoll Documentation of data usage COST723-WG1: Collecting of data of key parameter (4)

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 Assessment of ??? Instrumentation & Data sets Documentation of Techniques Sampling Precision &Accuracy Action plan at this Workshop Data Quality Comparability of data from different platforms through: Cross validation of data sets In-situ intercomparisons Is there a standard data set COST723-WG1: Assessment of Data & Techniques (1)

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 COST723-WG1: Assessment of Data & Techniques (2) State of the Art for Ozone and Water Vapor: SPARC-Assessments SPARC Assessment of Upper Tropospheric and Stratospheric Water Vapour 2000 STRATOSPHERIC PROCESSES AND THEIR ROLE IN CLIMATE SPARC A project of the WMO/ICSU/IOC World Climate Research Programme

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 Chapter 1: Instrumentation and Data Sets Chapter 2: Data Quality Chapter 3: Distribution and Variability of H2O in UT and Stratosphere SPARC Assessment of Upper Tropospheric and Stratospheric Water Vapour 2000 However: Strong Focus on Stratosphere Lack of reliable H2O in UT/LS

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 SPARC Assessment of Upper Tropospheric and Stratospheric Water Vapour 2000

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 MOZAIC-UTH: Comparison with MLS/UARS Satellite  MLS observe no ice super saturation (retrieval and/or limited horizontal resolution)  MLS lower than MOZAIC (Slope=0.64)  Large variations due to  Atmospheric variability &  Limited resolution of MLS (  Z=4-5 km) Source: Read et al., UARS Microwave Limb Sounder upper tropospheric humidity measurement: Method and validation, J. Geophys. Res., 2000 Coincidence criterion: 1º x 1º x 1 km x 3 h Total: 384 Coincidences Aug.1994-Dec.1997

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 MOZAIC-UTH: Comparison with POEM III Satellite  POEM III= Polar Ozone and Aerosol Measurement III satellite operational since April 1998  Good agreement POEM with MOZAIC (Slope=0.98)  Large variations due to  Atmospheric variability &  Limited resolution of POEM (  X=250 km) Source: Nedoluha et al., POAM III measurements of water vapor in the upper troposphere and lower most stratosphere, J. Geophys. Res., 2002 Coincidence criterion: 2.5º x 2.5º x 1 km x 6 h Total: 200 Coincidences April 1998-Feb.2000 Slope = 0.98 (r=0.70) Offset= 3.6 ppmv POEM-UTH (ppmv) MOZAIC-UTH (ppmv)

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 Coincidence in Time and Space (1): Water Vapor Variability Versus Horizontal Scale  FISH-Lyman(  )  CRISTA-Satellite  CRISTA-Satellite Z=12.5 km Lat.35 o -45 o N Source: Offermann et al. J. Geophys.Res., 107, 2002

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 Coincidence in Time and Space (2): CRISTA versus FISH Pressure: hPa  X  200 km ;  t  2 hours N = 413, Corr.Coef=0.93 Pressure: hPa  X  50 km ;  t  2 hours N = 28, Corr.Coef=0.97 Source: Offermann et al. J. Geophys.Res., 107, 2002 Source: Offermann et al. J. Geophys.Res., 107, 2002

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 Coincidence in Time and Space (3): CRISTA versus CRISTA (Eigen Scatter) Source: Offermann et al. J. Geophys.Res., 107, 2002 Pressure: 215 hPa ;  X  400 km ;  t  2 hours ; Shaded Area is instrumental noise (  11%)

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 RS80-Humicap-A: Comparison UTH with MOZAIC  Radiosounding station Lindenberg at 14.1 o E, 52.2 o N  Coindence less than (1 hour ; 2 degree lat. & long. ; Z AC +/-250m )

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 Integrated Global Atmospheric Chemistry Observations IGACO As part of IGOS = Integrated Global Observing Strategy

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 IGACO-Theme Report (Draft January 2004): Time Line Water Vapor Integrated Global Atmospheric Chemistry Observations System

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004 LAUTLOS: Hygrometer intercomparison campaign at Sodankylä, February 2004

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004

IGACO-Theme Report (Draft January 2004): Time Line Stratospheric Ozone Integrated Global Atmospheric Chemistry Observations System

Herman G.J. Smit/FZJ-COST723-WG-I Overview Noordwijk March 2004

IGACO-Theme Report (Draft January 2004): Time Line Tropospheric Ozone Integrated Global Atmospheric Chemistry Observations System