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Instrument

CWM
Johnson-Williams Cloud Water Meter

The Johnson-Williams Cloud Water Meter (CWM) is an in situ airborne hot wire probe manufactured by Johnson-Williams, Inc. The CWM measures the liquid water content (LWC) of clouds through an electric circuit that senses resistivity changes from cloud droplets that evaporate from an exposed heated wire. CWM can detect LWC ranges between 0 and 6 grams per cubic meter and operate at airspeeds between 50 and 150 meters per second. It operates at a constant current and has a typical data frequency of 2 Hz.

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)

Overview

Instrument Details

Meter/Analyzer
Earth Science > Atmosphere > Clouds > Cloud Microphysics > Cloud Liquid Water/ice
Earth Science > Atmosphere > Clouds > Cloud Microphysics
Troposphere
2 Hz
Point
N/A
https://doi.org/10.1175/1520-0450(1982)021%3C0098:COJWLW%3E2.0.CO;2External Link

  • Currently unavailable

  • Currently unavailable

  • Johnson-Williams, Inc.

  • Currently unavailable

  • Currently unavailable

    • Unpublished

Instrument Operation

C-131A

Convair C-131 Samaritan

4 Campaigns · 22 Instruments
TARFOX

Tropospheric Aerosol Radiative Forcing Observational Experiment

1996
Western Atlantic Ocean, US Eastern Seaboard
view all deployment dates
1 Deployment
· 5 Data Products
FIRE

First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment

1986—1998
Central and Midwest United States, California Coast, Northwest Africa, Alaska
view all deployment dates
5 Deployments
· 131 Data Products
ASTEX

Atlantic Stratocumulus Transition Experiment

1992
Azores and Madeira islands
view all deployment dates
1 Deployment
· 0 Data Products
FIRE

First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment

1986—1998
Central and Midwest United States, California Coast, Northwest Africa, Alaska
view all deployment dates
5 Deployments
· 131 Data Products
Sabreliner

NCAR Sabreliner

2 Campaigns · 21 Instruments
FIRE

First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment

1986—1998
Central and Midwest United States, California Coast, Northwest Africa, Alaska
view all deployment dates
5 Deployments
· 131 Data Products
FIRE

First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment

1986—1998
Central and Midwest United States, California Coast, Northwest Africa, Alaska
view all deployment dates
5 Deployments
· 131 Data Products
FIRE

First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment

1986—1998
Central and Midwest United States, California Coast, Northwest Africa, Alaska
view all deployment dates
5 Deployments
· 131 Data Products
FIRE

First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment

1986—1998
Central and Midwest United States, California Coast, Northwest Africa, Alaska
view all deployment dates
5 Deployments
· 131 Data Products

Data Products

Filter data products from this instrument by specific campaigns, platforms, or formats.

Campaigns
CAMPAIGNS
Platforms
PLATFORMS
Formats
FORMATS
10.5067/ASDC_DAAC/TARFOX/0002External Link
10.5067/ASDC_DAAC/FIRE/0089External Link
Native