Hygrometer Intercomparison Campaign at Sodankylä, LAUTLOS Jan 26-feb 28, 2004

Meteorologisches Observatorium Lindenberg

22.04.23 Folie 1

Hygrometer Intercomparison Campaign at Sodankylä, LAUTLOSJan 26-feb 28, 2004

Esko Kyrö1, Rigel Kivi1, Juha Karhu1, Timo Turunen1, Tuomo Suortti1, Timo Sukuvaara1, Ari Paukkunen2, Paul Ruppert3, Rolf Maag3, Thomas Brossi3, Ulrich Leiterer4, Tatjana Naebert4, Gisela Peters4, Vladimir Yuskov5, Alexander Lukyanov5, Alexander Kats5, Sergey Khaikin5, Leonid Korshunov5, Daria Vasilyeva5, Holger Vömel6, Roland Neuber7, Marion Müller7, Niklaus Kämpfer8, Beat Deuber8, Alexander Häfele8, Dietrich Feist8

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

Esko Kyrö, Finnish Meteorological Institute


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Vaisala RS-90 sonde has dual H-polymer humicap switching sequentially between heating(=de-icing) and measuring cycles (1999-2004 at FMI).

FN-sonde of Lindenberg Observatory, Germany, uses slightly modified Vaisala RS-90 and Lindenberg’s own calibration/calculation method



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Vaisala Radiosonde RS-92 (2005 –> at FMI). Humicap-h Unit in the Sensorboom Is the Same As in RS-90. Main Developments in Temperature Sensor (Very Small Radiation Corr/fast), in Calibration and Computation Procedures of Humicap, and Correlating GPS Wind Finding. All Digital.



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Peltier cooled dew/frostpoint mirror hygrometer ”Snow White” of Meteolabor AG, Switzerland. The mirror and sondepackage.



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Cryogen cooled Frostpoint mirror Hygrometer (CFH) of Colorado University: The mirror, control board and sonde package



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Lyman Alpha hygrometer from Central Aerological Observatory, FLASH



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MIAWARA, the 22 GHz travelling microwave radiometer of University of Bern



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An example of Balloon Trajectories during LAUTLOS Campaign

Rigel Kivi, Tuomo Suortti, Finnish Meteorological Institute


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RS-92

FLASH,

RS-80 A

FN-90, Lindenberg, raw RS-90

NOAA, RS-80 H

SnowWhite

LAUTLOS

Heavy payload configuration

17 UT, with NOAA and FLASH



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RS-80 A

LAUTLOS

Light weight payload configuration

11:30 UT and 17 UT

without NOAA/FLASH

RS-92

RS-90

FN-90, Lindenberg, RS-90 SnowWhite

Battery package



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Date 550KThursday 29 Jan 04 in NOAA FLASH MWFriday 30 Jan 04 edge NOAA FLASH MWSaturday 31 Jan 04 in CFH FLASH MWSunday 01 Feb 04 MWMonday 02 Feb 04 MWTuesday 03 Feb 04 MWWednesday 04 Feb 04 FLASH rec MWThursday 05 Feb 04 MWFriday 06 Feb 04 in NOAArec FLASH MWSaturday 07 Feb 04 MWSunday 08 Feb 04 MWMonday 09 Feb 04 MWTuesday 10 Feb 04 opening meeting MW 11:30 UT 17:30 UTWednesday 11 Feb 04 out NOAA FLASH MW daytime nightimeThursday 12 Feb 04 MW daytime nightimeFriday 13 Feb 04 MW daytime nightimeSaturday 14 Feb 04 MW daytime nightimeSunday 15 Feb 04 out CFH FLASH, SZA 98deg MW daytime nightimeMonday 16 Feb 04 filaments NOAA FLASH LearJet 17:15 MW daytime nightimeTuesday 17 Feb 04 filaments 2 NOAAs, NyAlesund + SodankylaFLASH LearJet 17:15 MW daytime nightime

Wednesday 18 Feb 04 edge NOAA FLASHLearJet mo+evening MW daytime nightime

Thursday 19 Feb 04 LearJet 17:15 MW daytime nightimeFriday 20 Feb 04 LearJet 17:15 MW daytime nightimeSaturday 21 Feb 04 LearJet 9:00 LT ? MW daytime nightimeSunday 22 Feb 04 MWMonday 23 Feb 04 edge NOAA rec FLASH rec MW daytime nightimeTuesday 24 Feb 04 edge NOAA rec FLASH rec MW daytime nightimeWednesday 25 Feb 04 edge CFH evening FLASH rec MW daytime nightime

Thursday 26 Feb 04

closing meeting 1:30 PM NOAA new FLASH new MW nightime

Friday 27 Feb 04 CFH MWSaturday 28 Feb 04 departure MW

14 14 6 31 14 15



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Notes to the abbrevations:

FN - Lindenberg reference sonde using polymer and FN method

92 - Vaisala RS92 advanced sonde using polymer and factory calibration

SWw - Meteolabor Snow White dew/frostpointmirror sonde with condensated water at the mirror

SWi - Meteolabor Snow White dew/frostpointmirror sonde with sublimated/frozen ice at the mirror

NOa - NOAA/CFH frostpoint mirror sonde with sublimated/frozen ice at the mirror, ascent data

NOd - NOAA/CFH frostpoint mirror sonde with sublimated/frozen ice at the mirror, descent data

SATi - RH related to water for ice saturation (only dependent of Tai)

Tai - air temperatur measured with F-Thermocap at the FN-sonde (modified RS90 sensor) and Vaisalafactory calibration

Tsw - Snow White mirror surface temperature

0

1

2

3

4

5

6

7

8

9

10

11

12

0 10 20 30 40 50 60 70 80 90 100 110 120 130RH [%]

H [k

m]

-140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10

T [°C]

Fig.1: Comparison of nighttime FN-SW-92-NO relative humidity profiles in the Arctic troposphere in the height range 0.18 - 12 km, Sodankylä, 15.02.04, 17:25 ascent. Details are presented in Fig.2 (0 - 2 km), Fig.3 (2 - 4 km), Fig.4 (4 - 6 km), Fig.5 (6 - 8 km), Fig.6 (7 - 10 km) and Fig.7 (9 - 12 km).

TaiTswSATi

NOa

FNNOd

SWi

SWw 92

Ulrich Leiterer, Meteorologisches Observatorium Lindenberg


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0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

40 50 60 70 80 90 100 110

RH [%]

H [k

m]

-20 -15 -10 -5 0 5 10 15

T [°C]

SWw

FN

92

NOa

SATi

Tsw

Tai

IV

III

II

I

Fig. 2: Details (0-2 km)



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2

2.2

2.4

2.6

2.8

3

3.2

3.4

3.6

3.8

4

10 20 30 40 50 60 70 80 90 100 110 120

RH [%]

H [k

m]

-70 -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 -15

T [°C]

92SWwNOaFN

SWi

TaiTsw

SATi

IV

III

II

I




22.04.23 Folie 15

4

4.2

4.4

4.6

4.8

5

5.2

5.4

5.6

5.8

6

0 10 20 30 40 50 60 70 80 90 100

RH [%]

H [k

m]

-75 -70 -65 -60 -55 -50 -45 -40 -35 -30 -25

T [°C]

NOd

NOa

SW i

92FN

TaiTswSATi

IV

III

II

I




22.04.23 Folie 16

TaiTswSATi

6

6.2

6.4

6.6

6.8

7

7.2

7.4

7.6

7.8

8

0 10 20 30 40 50 60 70 80 90 100

RH [%]

H [k

m]

-85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35

T [°C]

NOd

FN92SW i

NOa

III

II

I


TaiTswSATi



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7

7.5

8

8.5

9

9.5

10

0 10 20 30 40 50 60 70RH [%]

H [k

m]

-80 -75 -70 -65 -60 -55 -50 -45

T [°C]

tropopause

SATiTaiTswFN

92SW i

NOd

NOa

II

I




22.04.23 Folie 18

9

9.5

10

10.5

11

11.5

12

0 5 10 15 20RH [%]

H [k

m]

-130 -110 -90 -70 -50T [°C]

FN92

SW i

NOa

NOd

TaiTsw

I

tropopause



Hygrometer Intercomparison Campaign at Sodankylä, LAUTLOS Jan 26-feb 28, 2004

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Transcript of Hygrometer Intercomparison Campaign at Sodankylä, LAUTLOS Jan 26-feb 28, 2004