Radiosondes launched at NSA during the WVIOP04

VAISALA RS90(operated by ETL and ARM)

4 times per day at the ARMduplex (00, 06, 12, 18 UTC)

1 time per day at the ARM “Great White” site

(00 UTC)Humidity sensor: H-Humicap

Meteolabor “SNOW WHITE” (operated by NASA)

5 during the night, 3 during the day

Humidity sensors: VIZ Carbon Hygristor; Snow White

Chilled Mirror

Sondes VIZ-B2 (from National Weather

Service)2 times per day in Barrow

(00, 12 UTC)Humidity sensor: VIZ Carbon

Hygristor

Dual launches: Vaisala RS90 and Snow White at the ARM

duplex

Comparisons of relative humidity Comparisons of relative humidity measurementsmeasurements

0 20 40 60 80 1000

5

10

15

RH (%)

He

igh

t (km

)

20040328--11(UTC) (first 15 km)

RH Snow White Carbon HygristorRH Snow White Chilled MirrorRH NWS AIR VIZRH Vaisala RS90 at DPLX

70 75 80 85 90 95 1000

0.5

1

1.5

Julian Day (UTC)

PW

V (

cm)

PWV from DPLX sondesPWV form NWS sondesPWV from GW sondesPWV from SW-CH sondesPWV from SW-CM sondes

Comparisons of PWV from RAOBs

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

PWV from DPLX sondes (cm)

PW

V fr

om

NW

S s

on

de

s (c

m)

N. Samples = 40

Std = 0.047 (cm)

Bias (NWS-DPLX) = 0.048 (cm)

Slope = 1.0343

Int = 0.039 (cm)

0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.40.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

PWV from SW-CM sondes (cm)

PW

V fr

om

DP

LX

so

nd

es

(cm

)

N. Samples = 8

Std = 0.0085 (cm)

Bias (DPLX-SWCM

) = -0.0004 (cm)

Slope = 0.95104

Int = 0.0067374