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

COST 723 Workshop Sofia, May 17-19, 2006

Stefan Buehler

Data Exploitation and Modeling for the Upper Troposphere and Lower Stratosphere

www.cost723.org

WG1 Activities


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


Stefan Buehler

In Situ

MOL Lindenberg (RS80, RS92)

FMI Sodankylä (LAUTLOS campaign)

Institute of Meteorology Portugal (ozone RS)


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


Stefan Buehler

100

1000

-2 -1 0 1 2 3 4 5 6

rel. hum. [%]

P [

hP

a]

RS80

RS92

U URS80 - UFN(1999-2004 / n=308, 12 UT)U URS92 - UFN(07/04 - 08/05 / n=48, 12 UT)

200

500

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

RS80

RS92

improvement


Stefan Buehler

temperature difference (day minus night)

1

10

100

1000

-0.5 0 0.5 1 1.5 2

T [K]

P[h

Pa

]

RS92[day(12UTC)- night(00UTC)]

RS80[day(12UTC)- night(00UTC)]

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1000

-10 -8 -6 -4 -2 0 2

RH[%]

P[h

Pa

]

RS80[day(12UTC)-night(00UTC)]

RS92[day(12UTC)-night(00UTC)]

difference of relative humidity (day minus night)

day-nigth-comparison of sondes RS80 and RS92


Stefan Buehler

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

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


Stefan Buehler

1. Finnish Met. Institute-Arctic Research Centre , Sodankylä, Finland2. Vaisala Oyj, Helsinki, Finland3. Meteolabor AG, Zürich, Switzerland 4. German Weather Service, Meteorological Observatory Lindenberg, Germany 5. Central Aerological Observatory, Moscow, Russia 6. University of Colorado, Boulder, USA7. Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany 8. University of Bern , Switzerland

Hygrometer

Intercomparison

Campaign

at Sodankylä,

LAUTLOS

Jan 26-Feb 28

2004


Stefan Buehler

LAUTLOS: Tropospheric resultsTuomo 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

Arctic H2O observations in the LS

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

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28

water vapor (ppmv)

Alti

tud

e (

km)

April 2003Feb 2004Mar 2006

Outsidevortex

3 4 5 6 7 8 9 10

water vapor (ppmv)

Jan 2003Feb 2004Feb 2005Jan 2006

Insidevortex


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.


Stefan Buehler

COST 723 Contributions

2 LAUTLOS Meetings (Lindenberg and Helsinki)

Several STSMs, mostly about radiosonde correction algorithms


Stefan Buehler

Ground Based

Uni Bern (Microwave)

CNR-IMAA Potenza (LIDAR)

CNR-ISAC Rome (LIDAR)


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


Stefan Buehler

Comparison Microwave aircraft H2O versus ECMWF Model


Stefan Buehler

Water vapour Raman lidar at CNR-IMAAG. 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

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


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)


Stefan Buehler


1 LIDAR meeting

1 STSM

Contacts and data exchange


Stefan Buehler

Satellite

Chalmers Göteborg (Odin SMR)

HIPC Prague (Odin SMR isotopes)

Uni Bremen (AMSU-B)


Stefan Buehler

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.

M. Ekström, P. Eriksson and B. Rydberg, Chalmers ([email protected])

DJF 2001-2004 mean


Stefan Buehler

Odin-SMR: Strato-mesospheric humidity

20 – 100 km:488GHz -> 20-75km556GHz -> 40-100km

Also isotopomers:H

218O and HDO

Roughly 4 observation days per month since Nov 2001

J. Urban, N. Lautie and D. Murtagh, Chalmers ([email protected])

488 GHzzonal mean2001-12-15


Stefan Buehler

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.

0.0

0.5

1.0

1.5

2.0

d

c

b

501.

5672

16

a

Brig

ht. T

empe

ratu

re (

K)

14N

14N

16O

501.54 501.56 501.58

CH

3OH

HD

18O

501.

5354

64

501.

5889

89

Frequency (GHz)

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

AMSU-B Work in Bremen

Stefan BuehlerInstitute of Environmental PhysicsUniversity of Bremen

www.sat.uni-bremen.de


Stefan Buehler

AMSU UTH-Climatology

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

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)


Stefan Buehler


1 STSM

Contacts and data exchange


Stefan Buehler

Summary and Conclusions

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

Documents

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