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Instrument

CWM
Johnson-Williams Cloud Water Meter

The Johnson-Williams Cloud Water Meter (CWM) is a mounted airborne hot wire probe developed by Johnson-Williams, Inc. The CWM measures the liquid water content (LWC) of clouds using an electrical circuit that detects resistivity changes caused by cloud droplets evaporating from an exposed heated wire. It can detect LWC levels ranging from 0 to 6 grams per cubic meter and operates at airspeeds between 50 and 150 meters per second. The device runs on a constant current and typically records data at 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    • Unpublished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

6 Campaigns · 32 Instruments
TARFOX

Tropospheric Aerosol Radiative Forcing Observational Experiment

1996
Western Atlantic Ocean, US Eastern Seaboard
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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
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5 Deployments
· 131 Data Products
ASTEX

Atlantic Stratocumulus Transition Experiment

1992
Azores and Madeira islands
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1 Deployment
· 0 Data Products
MAST

Monterey Area Ship Track

1994
Central California Coast, Pacific Ocean
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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
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5 Deployments
· 131 Data Products
CaPE

Convection and Precipitation/Electrification Experiment

1991
East-Central Florida
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1 Deployment
· 0 Data Products
Sabreliner

NCAR Sabreliner

3 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
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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
CEPEX

Central Equatorial Pacific Experiment

1993
Central Pacific Ocean
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1 Deployment
· 1 Data Product
CEPEX

Central Equatorial Pacific Experiment

1993
Central Pacific Ocean
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1 Deployment
· 1 Data Product
CAMEX

Convection and Moisture Experiment

1993—2001
US Atlantic coast, Gulf of Mexico, Caribbean
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4 Deployments
· 70 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