Subject: Case Study: ATOC vs Microwaves and Global Warming

Michael Williamson (whe_william)
Mon, 18 Apr 1995 14:12:30

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From: Michael Williamson <WHE_WILLIAM@FLO.ORG>
Subject: Case Study: ATOC vs Microwaves and Global Warming
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From:	SMTP%"MARMAM@UVVM.BITNET" 16-APR-1995 12:33:23.93
To:	WHE_WILLIAM
CC:	
Subj:	Alternative to ATOC?
 
Date:         Sat, 15 Apr 1995 16:08:02 -0700
Reply-To:     Marine Mammals Research and Conservation Discussion
              <MARMAM@UVVM.BITNET>
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              <MARMAM@UVVM.BITNET>
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From:         Jim Moore <jmoore@weber.ucsd.edu>
Subject:      Alternative to ATOC?
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To:           Multiple recipients of list MARMAM <MARMAM@UVVM.BITNET>
 
The NY Times today (Saturday, 15 April) on p. 10 has an article about
the use of microwave signals sent out by NAVSTAR satellites to measure
air temperature by difraction in the atmosphere at elevations from
ground level to 80 miles.  Basically, the NAVSTAR satellites are the
ones used for GPS; a just-launched "GPS/MET" satellite will pick up
signals of NAVSTARs near occlusion & since locations are precisely
known, difraction can be worked out (atmospheric water is a problem
the proponents believe is solvable--ie, the system's not proven yet).
If it works, a fleet of 50 - 100 GPS/MET satellites is envisioned.
 
Sounds like it uses a technique conceptually very similar to ATOC and
would collect spatially-averaged atmospheric temps that should permit
trend analysis etc.
 
As I understand it, ocean temperatures via ATOC would still be uniquely
valuable for developing/calibrating global climate models, but GPS/MET
might take some of the urgency away, justifying a go-slow-and-careful
approach to the ATOC project ... ???  Opinions from climatologists out
there?
 
cheers
Jim
Jim Moore   Anthropology-0101/UCSD/La Jolla CA 92093   jjmoore@ucsd.edu