COST 723 Workshop Sofia, May 17-19, 2006

Data Exploitation and Modeling for the Upper Troposphere and Lower Stratosphere

www.cost723.org

WG1 Activities

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

Overview

Focus on humidity measurements (But also one ozone activity) Improvements of different techniques and intercomparisons – In Situ – Ground Based – Satellite Summary and Conclusions

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

In Situ

MOL Lindenberg (RS80, RS92) FMI Sodankylä (LAUTLOS campaign) Institute of Meteorology Portugal (ozone RS)

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

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

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

RS92 and RS80-A(corrected with the Lindenberg method) mean humidity difference  U [%] related to Lindenberg FN-reference sounding and their standard deviation ( s ) on main pressure levels

100



U U RS80 - U FN

(1999-2004 / n=308, 12 UT ) 

U U RS92 - U FN

(07/04 - 08/05 / n=48, 12 UT)

RS80

s

RS80 RS92

s

RS92 200

s RS92 improvement s RS80

500 1000 -2 -1 0 1 2 rel. hum. [%] 3 4 5 6 Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006 temperature difference (day minus night) 1 -0.5

0 0.5

T [K] 1 1.5

RS92[day(12UTC)- night(00UTC)] RS80[day(12UTC)- night(00UTC)] 2 10 day-nigth-comparison of sondes RS80 and RS92 difference of relative humidity (day minus night) RH[%] 10 -10 -8 -6 -4 -2 0 RS80[day(12UTC)-night(00UTC)] RS92[day(12UTC)-night(00UTC)] 2 100 100 1000 1000 Stefan Buehler

COST 723 Workshop Investigation of direct solar radiation influence on temperatur and humidity radiosonde sensor

ventilated low pressure (3-1000 hPa) vacuum chamber with quartz window

Sofia, May 17-19, 2006 Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006 Hygrometer Intercomparison Campaign at Sodankylä, LAUTLOS Jan 26-Feb 28 2004

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

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

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

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

Arctic H

2

O observations in the LS

18 16 14 12 10 2 28 Balloon borne frost point hygrometers flown in the winters of 2002/2003 2005/2006 in Sodankylä (67.4°N). Profiles inside the Arctic vortex (right) and in the vicinity of the vortex (left). From Kivi et al., 2006 26 24 Outside vortex Inside vortex 22 20 3 April 2003 Feb 2004 Mar 2006 4 5 6 7 water vapor (ppmv) 8 9 10 3 Jan 2003 Feb 2004 Feb 2005 Jan 2006 4 5 6 7 water vapor (ppmv) 8 9 10

Stefan Buehler

COST 723 Workshop

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.

Sofia, May 17-19, 2006 Stefan Buehler

COST 723 Workshop

COST 723 Contributions

Sofia, May 17-19, 2006

2 LAUTLOS Meetings (Lindenberg and Helsinki) Several STSMs, mostly about radiosonde correction algorithms

Stefan Buehler

COST 723 Workshop

Ground Based

Uni Bern (Microwave) CNR-IMAA Potenza (LIDAR) CNR-ISAC Rome (LIDAR)

Sofia, May 17-19, 2006 Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006 Combined Water Vapor Profiles over Sodankylä during the LAUTLOS Campaign

Alexander Haefele, University of Bern

MW 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.

balloon Contour: ECMWF modified PV Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

Comparison Microwave aircraft H2O versus ECMWF Model

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

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.) [email protected]

CNR-IMAA Raman Lidar operative since May 2002 2 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

Involvements

    Validation of MIPAS water vapor product NDSC for UT/LS water vapor monitoring LAUNCH 2005 Aura, AIRS, IASI validation

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

Stefan Buehler

COST 723 Workshop Raman Lidar Water Vapor Measurements CNR- ISAC, Rome – Tor Vergata During the last year the complete set of the array of nine 50-cm telescopes has been performed.

(F.Congeduti

) 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 Sofia, May 17-19, 2006 Stefan Buehler

COST 723 Workshop

COST 723 Contributions

Sofia, May 17-19, 2006

1 LIDAR meeting 1 STSM Contacts and data exchange

Stefan Buehler

COST 723 Workshop

Satellite

Chalmers Göteborg (Odin SMR) HIPC Prague (Odin SMR isotopes) Uni Bremen (AMSU-B)

Sofia, May 17-19, 2006 Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

Odin-SMR: Upper tropospheric retrievals

First retrieval: uses only lowest tangent altitudes Only tropics Humidity: 2 layers @ 200/130 hPa (10-25 km possible) Cloud ice: column above 12.5 km Rydberg et al.

DJF 2001-2004 mean M. Ekström, P. Eriksson and B. Rydberg, Chalmers ([email protected])

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

Odin-SMR: Strato-mesospheric humidity

20 – 100 km: 488GHz -> 20-75km 556GHz -> 40-100km Also isotopomers: H 2 18 O and HDO

Roughly 4 observation days per month since Nov 2001

488 GHz zonal mean 2001-12-15 J. Urban, N. Lautie and D. Murtagh, Chalmers ([email protected])

Stefan Buehler

COST 723 Workshop Sofia, May 17-19, 2006

Observation of HD18O, CH3OH and vibrationally-excited N2O from Odin/SMR measurements By averaging more than 400 000 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.

2.0

1.5

1.0

0.5

0.0

d c b a 501.54

501.56

Frequency (GHz) 501.58

Sub-millimeter wave spectra over the 501.52-501.59 GHz micro-window minus modeled fit: a) Southern Hemisphere, lat < 30 °S; b) Global, 90°S < lat < 90°N; c) Northern Hemisphere, lat > 30 °N; d) Tropics, 30°S < lat < 30°N. Data were averaged over the range 17.5 - 67.5 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 Stefan Buehler

COST 723 Workshop

AMSU-B Work in Bremen

Stefan Buehler Institute of Environmental Physics University of Bremen www.sat.uni-bremen.de

Sofia, May 17-19, 2006 Stefan Buehler

COST 723 Workshop

AMSU UTH-Climatology

Sofia, May 17-19, 2006

AMSU-B, Channel 18, NOAA 15, Winter 1999-2000. 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:10.1029/2004JD005111)

Stefan Buehler

COST 723 Workshop Comparison radiosonde ↔ AMSU Sofia, May 17-19, 2006

• Comparison of corrected radiosondes from Lindenberg to AMSU • Increasing dry bias for dry conditions (4%RH at 0%RH) Buehler et al., JGR 2004

Stefan Buehler

COST 723 Workshop

COST 723 Contributions

Sofia, May 17-19, 2006

1 STSM Contacts and data exchange

Stefan Buehler

COST 723 Workshop

Summary and Conclusions

Sofia, May 17-19, 2006

A lot of ongoing activities (19 publications so far on www.cost723.org/publications) 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

Stefan Buehler