Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Dewpoint
Name:  Marshall
Status: other
    age         40s
Age: N/A
Location: N/A
Country: N/A
Date: 2000-2001


Question:
Is it possible to lower the dew point in a controlled environment? If so how might it be done?


Replies:
Dear Marshall-

Yes it is possible to lower the dew point. The dew point is determined by the amount of moisture in the air. The closer the air is to saturation, the dew point approaches the air temperature.

To lower the dew point, moisture must be removed from the air. This can be done in several ways...the most common is to "condition" the air...that is, run it through an air conditioner, which cools the air to condense moisture, and then when it warms, the dew point will be lower. Another method is to use a chemical dessicant, which absorbs moisture or humidity from the air.

Wendell Bechtold, Meteorologist
Forecaster, National Weather Service
Weather Forecast Office, St. Louis, MO


The dew point depends of the amount of moisture in the air. Processes that reduce the humidity, such as the use of dessicants (materials that bind to water vapor), a dehumidifier, or air conditioning , will lower the dew point.

Richard E. Barrans Jr., Ph.D.
Assistant Director
PG Research Foundation, Darien, Illinois


Click here to return to the Weather Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory