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Instrument

CWM
Johnson-Williams Cloud Water Meter

The Johnson-Williams Cloud Water Meter (CWM) utilizes a resistance wire that has been calibrated to infer liquid water content (LWC) within clouds. Evaporation of water droplets that impact the wire lead to temperature variations of the wire which can be linearly correlated with liquid water content. Additionally, a second wire allows compensation of altitude, temperature, and speed for more accurate measurements. The CWM can be operated over LWC ranges between 0 and 6 grams per cubic meter and at air speeds between 50 and 150 meters per second. Collection efficiency for the instrument has been shown to decrease when water droplets are larger than 30 micrometers; making the probe more beneficial for small droplet usage.

NASA's DC-8 flying laboratory passes Antarctica's tallest peak, Mount Vinson, on Oct. 22, 2012, during a flight over the continent to measure changes in the massive ice sheet and sea ice. Credit: NASA/Michael Studinger (Photography courtesy NASA Images)

Instrument Details

Magnetic/Electric
Earth Science > Atmosphere > Clouds > Cloud Microphysics > Cloud Liquid Water/ice
Troposphere
1 second - < 1 minute
Point Resolution
This data will be added in future versions
External Linkhttps://doi.org/10.1175/1520-0450(1982)021%3C0098:COJWLW%3E2.0.CO;2
  • Currently unavailable

  • This data will be added in future versions

  • Johnson-Williams, Inc.

  • Currently unavailable

  • Currently unavailable

C-131A

Convair C-131 Samaritan

2 Campaigns · 18 Instruments
Sabreliner

NCAR Sabreliner

1 Campaign · 16 Instruments

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External Link10.5067/ASDC_DAAC/TARFOX/0002
External Link10.5067/ASDC_DAAC/FIRE/0089