COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Data Exploitation and Modeling for the Upper Troposphere and Lower Stratosphere WG1 Activities

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Overview Focus on humidity measurements (But also one ozone activity) Improvements of different techniques and intercomparisons –In Situ –Ground Based –Satellite Summary and Conclusions

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler In Situ MOL Lindenberg (RS80, RS92) FMI Sodankylä (LAUTLOS campaign) Institute of Meteorology Portugal (ozone RS)

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Lindenberg Observatory (DWD) [U.Leiterer/H.Dier]: 1. Examination of humidity-differences between radiosondes RS80 and RS92 with help of weekly Lindenberg FN-soundings 2. day-nigth-comparison of both sondes RS80 and RS92 and experimental investigation of influence of solar radiation

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler RS92 and RS80-A(corrected with the Lindenberg method) mean humidity difference  U [%] related to Lindenberg FN-reference sounding and their standard deviation (  ) on main pressure levels  RS92  RS80  RS92 improvement

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler day-nigth-comparison of sondes RS80 and RS92

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Investigation of direct solar radiation influence on temperatur and humidity radiosonde sensor ventilated low pressure ( hPa) vacuum chamber with quartz window

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler 1. Finnish Met. Institute-Arctic Research Centre, Sodankylä, Finland 2. Vaisala Oyj, Helsinki, Finland 3. Meteolabor AG, Zürich, Switzerland 4. German Weather Service, Meteorological Observatory Lindenberg, Germany 5. Central Aerological Observatory, Moscow, Russia 6. University of Colorado, Boulder, USA 7. Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany 8. University of Bern, Switzerland Hygrometer Intercomparison Campaign at Sodankylä, LAUTLOS Jan 26-Feb

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler LAUTLOS: Tropospheric results Tuomo Suortti Finnish Meteorological Institute Hygrometer inter-comparisons: Radiosondes: RS80-A, RS80-H, RS90, RS92 and FN Frost point hygrometers: NOAA/CMDL, CFH and Snow White Ly-alpha: FLASH-B PLOT KEY: - Plot shows RH differences as a function of temperature (i.e. temperature dependence, TD) - RS92 as used as a reference - Ambient RH is shown by the color scale. - CL=Leiterer TD-correction for RS80-A - CM=Miloshevich TD-correction

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Water vapour in the lower stratosphere during LAUTLOS ΔΘ above therm.trop Height above therm.trop.Potential temperature ΔΘ above dynam.trop DATA: 11 balloon flights of FLASH-B hygrometer; LAUTLOS campaign; ; Sodankylä, Finland. RESULTS: Troposphere-to-stratosphere transport (TST) occured mainly below 345K. Layer influenced by TST extended up to 2.5 km above local tropopause (or 30K in potential temperature scale) (see Karpechko et al., ACPD, 2006)

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Arctic H 2 O observations in the LS Balloon borne frost point hygrometers flown in the winters of 2002/ /2006 in Sodankylä (67.4°N). Profiles inside the Arctic vortex (right) and in the vicinity of the vortex (left). From Kivi et al., 2006

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Diamantino Henriques (Institute of Meteorology- Portugal) During May and April 2001 a campaign of simultaneously ozonesoundings at three upper air stations (Lisbon, Lajes and Funchal) was carried on using Brewer-Mast sondes adapted for Vaisala rawisondes. This experiment consisted in weekly soundings (total of 21) during winter-spring period when high changes of total ozone amount are normally observed at this latitudes.

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler The analyses of results show that most of the total ozone variability is due to lower stratosphere ozone variability due to dynamic processes, while absolute maximum values remains approximately constant. This experiment also show the capability of the existing stations to carry on an operational ozone sounding program.

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler COST 723 Contributions 2 LAUTLOS Meetings (Lindenberg and Helsinki) Several STSMs, mostly about radiosonde correction algorithms

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Ground Based Uni Bern (Microwave) CNR-IMAA Potenza (LIDAR) CNR-ISAC Rome (LIDAR)

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Combined Water Vapor Profiles over Sodankylä during the LAUTLOS Campaign Balloon data are used as a priori information in the MW retrieval. The result is a profile from the ground up to the mesopause based on the best inrormation source at every altitude level. Alexander Haefele, University of Bern Contour: ECMWF modified PV MW balloon

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Comparison Microwave aircraft H2O versus ECMWF Model

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Water vapour Raman lidar at CNR-IMAA G. Pappalardo, A. Amodeo, C. Cornacchia, G. D’Amico, F. Madonna, L. Mona CNR-IMAA, Tito Scalo (Potenza) Italy (40°36' N - 15°44' E, 760 m a.s.l.) CNR-IMAA Raman Lidar operative since May systematic lidar measurements per week, more than 2000 hours (day and nigth) of measurements performed up to now Calibration checked systematically with radiosondes and MW profiler Calibration factor results constant within 5% About 200 radiosonde launches from May 2002 MW profiler operational since February 2004 (24h per day, 7 days a week): Temperature, water vapor, cloud liquid water profiles up to 10 km above the station Recent activities Integration of Raman Lidar and MW profiler to improve water vapour profiling Assessment of the impact of the assimilation of high resolution profiles data into NWPM Involvements Validation of MIPAS water vapor product NDSC for UT/LS water vapor monitoring LAUNCH 2005 Aura, AIRS, IASI validation

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler During the last year the complete set of the array of nine 50-cm telescopes has been performed. The slide compares the water vapor vertical profile (30 min integration) taken by the 9-telescope channels of the lidar (red line), with the radiosounding (black line) from the Meteo Service of the Italian Military Aeronautics in Pratica di Mare, 25km S.E. of Tor Vergata Raman Lidar Water Vapor Measurements CNR- ISAC, Rome – Tor Vergata (F.Congeduti )

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler WV mixing ratio logarithmic contour [g/kg] Contour obtained by merging the profiles from lower (30-cm telescope) and upper (9-telescope array) channels of the lidar (merging altitude 4 km). Data taken in the framework of the LAUNCH campaign

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler COST 723 Contributions 1 LIDAR meeting 1 STSM Contacts and data exchange

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Satellite Chalmers Göteborg (Odin SMR) HIPC Prague (Odin SMR isotopes) Uni Bremen (AMSU-B)

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Odin-SMR: Upper tropospheric retrievals First retrieval: uses only lowest tangent altitudes Only tropics Humidity: 2 200/130 hPa (10-25 km possible) Cloud ice: column above 12.5 km Rydberg et al. M. Ekström, P. Eriksson and B. Rydberg, Chalmers DJF mean

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Odin-SMR: Strato-mesospheric humidity 20 – 100 km: 488GHz -> 20-75km 556GHz -> km Also isotopomers: H 2 18 O and HDO Roughly 4 observation days per month since Nov 2001 J. Urban, N. Lautie and D. Murtagh, Chalmers 488 GHz zonal mean

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Observation of HD18O, CH3OH and vibrationally-excited N2O from Odin/SMR measurements By averaging more than Odin/SMR spectra over the period from November 2002 to March 2003, we have been able to detect weak lines in the atmosphere. These weak lines have been attributed to water isotopic species HD18O, to a vibrationally-excited N2O, and to CH3OH. Sub-millimeter wave spectra over the GHz micro-window minus modeled fit: a) Southern Hemisphere, lat 30°N; d) Tropics, 30°S < lat < 30°N. Data were averaged over the range km and curves a, b and c are offset. Superimposed are the theoretical lines (vertical bars). Z. ZELINGER†, B. BARRET‡, P. KUBÁT†, P. RICAUD‡, J.-L. ATTIE‡, E. LE FLOCHMOËN‡, J. URBAN††, D. MURTAGH††, M. STŘIŽÍK‡‡ †J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic ‡Laboratoire d'Aerologie UMR 5560 CNRS/Universite Paul Sabatier, Observatoire de Midi-Pyrenees 14, Toulouse, France †† Chalmers University, Goteborg, Sweden ‡‡VŠB - Technical University of Ostrava, Ostrava, Czech Republic

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler AMSU-B Work in Bremen Stefan Buehler Institute of Environmental Physics University of Bremen

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler AMSU UTH-Climatology AMSU-B, Channel 18, NOAA 15, Winter Figure by Mashrab Kuvatov, paper in preparation. (Method explained in Buehler, S. A. and V. O. John, A Simple Method to Relate Microwave Radiances to Upper Tropospheric Humidity, GJR, 110, D02110, doi: /2004JD005111)

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Comparison radiosonde ↔ AMSU Buehler et al., JGR 2004 Comparison of corrected radiosondes from Lindenberg to AMSU Increasing dry bias for dry conditions (4%RH at 0%RH)

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler COST 723 Contributions 1 STSM Contacts and data exchange

COST 723 WorkshopSofia, May 17-19, 2006 Stefan Buehler Summary and Conclusions A lot of ongoing activities (19 publications so far on Intercomparisons give valuable insights –Inside a technique by different instruments –Across different techniques A pity to stop the good collaboration now  Suggestion for a follow-up action