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An instrument used to record changes in atmospheric pressure with an accuracy of microbars.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌmaɪkrəʊˈbærəˌɡrɑːf; -ˌɡræf)
(General Physics) a barograph that records minute changes in atmospheric pressure
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌmaɪ krəˈbɑr əˌgræf, -ˌgrɑf)

a barograph for recording minute fluctuations of atmospheric pressure.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


a barograph for recording small fluctuations of atmospheric pressure.
See also: Atmosphere, Weather
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
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Figure 3 shows an example of a 20-min computer output that included turbulent-flux parameters from the fast-response sensors (10 Hz), mean data from the slow-response sensors (1 Hz), and output from the microbarograph array (Hooke 1979; Bedard and Georges 2000) and optical triangle (Hooke 1979; Lawrence et al.
Since 2001, the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) has operated a global network of 45 microbarograph arrays to monitor the atmosphere for the lowfrequency (less than 20 hertz) "booms" of nuclear blasts around the planet.