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 Katz5, Sergey Khaikin5, Leonid Korshunov5, Daria Vasilyeva5, Holger Vömel6, Roland Neuber7, Marion Müller7, Niklaus Kämpfer8, Beat Dauber8, 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

Vaisala radiosonde RS-80 uses single Humicap A-polymer or H-polymer (used 1982-1999 at FMI)

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

Vaisala radiosonde RS-92 (2005 –> at FMI). Humicap-H unit in the sensorboom is the same as in RS-90. Developments in sensor technology, in ground preparation of Humicap, calibration and computation procedures of Humicap, and code correlating GPS Wind finding. All digital.

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

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

Lyman Alpha hygrometer from Central Aerological Observatory, FLASH

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

D. Feist, University of Bern

Date 550K PayloadThursday 29 Jan 04 in Full NOAA FLASH MWFriday 30 Jan 04 edge Full NOAA FLASH MWSaturday 31 Jan 04 in Full 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 Full NOAArec FLASH MWSaturday 07 Feb 04 MWSunday 08 Feb 04 MWMonday 09 Feb 04 MW smaller payloadTuesday 10 Feb 04 opening meeting MW 11:30 UT 17:30 UTWednesday 11 Feb 04 out Full 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 Full CFH FLASH, SZA 98deg MW daytime nightimeMonday 16 Feb 04 filaments Full NOAA FLASH LearJet 17:15 MW daytime nightimeTuesday 17 Feb 04 filaments Full 2 NOAAs, NyAlesund + SodankylaFLASH LearJet 17:15 MW daytime nightime

Wednesday 18 Feb 04 edge Full 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 MW daytime nightimeMonday 23 Feb 04 edge Full NOAA rec FLASH rec MW daytime nightimeTuesday 24 Feb 04 edge Full NOAA rec FLASH rec MW daytime nightimeWednesday 25 Feb 04 edge Full CFH evening FLASH rec MW daytime nightime

Thursday 26 Feb 04

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

Friday 27 Feb 04 CFH MWSaturday 28 Feb 04 departure MW

13 14 14 6 31 15 16

RS-80

RS-92

FLASH

FN-90 Lindenberg

NOAA

SnowWhite

LAUTLOS

Payload configuration

LAUTLOS water vapor campaign action at Sodankylä, Jan 26 - Feb 27, 2004

Typical balloon trajectory

Tropospheric part of profiles

Water vapour profiles from the ground to the mesosphereData from LAUTLOS campaign in Sodankylä, Feb. 2004

Profiles of Cryogenic Frostpoint Hygrometer of NOOA and Lyman-alpha hygrometer of CAO on the flight of Feb 17.

A.Luklyanov

300

350

400

450

500

550

600

650

700

0 1 2 3 4 5 6 7 8 9 10300

350

400

450

500

550

600

650

7000 20 40 60 80 100 120 140 160 180 200 220

Water vapour (ppmv)

Pote

ntia

l tem

pera

ture

(K)

H2O NOAA

H2O FLASH

PV

RDF PV