2007-11-01 Patrick Eriksson <patrick.eriksson@chalmers.se>

	* ARTS-XML-DATA-1-1-17

	* atmosphere/cira86/: Created files describing the CIRA86
	reference atmosphere. See README.FIRST.



git-svn-id: https://radiativetransfer.org/svn/rt/arts-xml-data/trunk@5529 aaf1aab0-4228-0410-ad68-8dceda47f409

ChangeLog

+2007-11-01  Patrick Eriksson  <patrick.eriksson@chalmers.se>
+
+	* ARTS-XML-DATA-1-1-17
+
+	* atmosphere/cira86/: Created files describing the CIRA86
+	reference atmosphere. See README.FIRST.
+
 2007-10-24  Stefan Buehler  <sbuehler(at)ltu.se>
 
 	* ARTS-XML-DATA-1-1-16

atmosphere/cira86/README

+COSPAR International Reference Atmosphere (CIRA-86)
+
+This directory contains 7 ascii files with the CIRA data in a
+self-explanatory format: 
+
+nht.dat  Zonally averaged monthly mean temperature as a function of
+         latitude and log-pressure scale height (resolution: 5 degrees
+         x 0.25 log-pressure scale heights) for the Northern Hemisphere 
+
+nhw.dat  Zonally averaged monthly mean zonal wind as a function of
+         latitude and log-pressure scale height (resolution: 5 degrees
+         x 0.25 log-pressure scale heights) for the Northern Hemisphere 
+
+nhz.dat  Zonally averaged monthly mean geopotential height as a function of
+         latitude and log-pressure scale height (resolution: 5 degrees
+         x 0.25 log-pressure scale heights) for the Northern Hemisphere 
+
+sht.dat  Zonally averaged monthly mean temperature as a function of
+         latitude and log-pressure scale height (resolution: 5 degrees
+         x 0.25 log-pressure scale heights) for the Southern Hemisphere 
+
+shw.dat  Zonally averaged monthly mean zonal wind as a function of
+         latitude and log-pressure scale height (resolution: 5 degrees
+         x 0.25 log-pressure scale heights) for the Southern Hemisphere 
+
+shz.dat  Zonally averaged monthly mean geopotential height as a function of
+         latitude and log-pressure scale height (resolution: 5 degrees
+         x 0.25 log-pressure scale heights) for the Southern Hemisphere 
+
+twp.dat  Zonally averaged monthly mean temperature, wind, and pressure
+         as a function of latitude and altitude (10 dregrees x 5 km)
+         for the entire globe  
+
+References:
+
+Fleming, E.L., S. Chandra, J.J. Barnett, and M. Corney, Zonal mean
+temperature, pressure, zonal wind, and geopotential height as
+functions of latitude, COSPAR International Reference Atmosphere:
+1986, Part II: Middle Atmosphere Models, Adv. Space Res., Vol. 10,
+No. 12, pp. 11-59, 1990. 
+
+Fleming, E.L., S. Chandra, M.R. Schoeberl, and J.J. Barnett, Monthly
+mean global climatology of temperature, wind, geopotential height, and
+pressure for 0-120 km, NASA Tech. Memo. NASA TM-100697, 85 pp., 1988. 
+(reprints available from Eric Fleming fleming@kahuna.gsfc.nasa.gov)
+------------------------------------------------------------------
+SPARC Data Center August 31, 2000 
+Petra Udelhofen, e-mail: petra.udelhofen@sunysb.edu

atmosphere/cira86/README.FIRST

+This directory contains files describing the COSPAR International Reference 
+Atmosphere (CIRA-86)
+
+The original CIRA-86 data are zonally averaged monthly mean
+climatologies of several atmospheric parameters.
+
+ * Temperatures, 
+ * zonal winds, and 
+ * geopotential heights 
+
+are available on a grid with a resolution of 5 degrees in latitude and 0.25 
+in log-pressure scale height. In addition, data sets of
+
+ * temperatures, 
+ * zonal winds, and 
+ * pressures 
+
+are accessible on a grid with a resolution of 10 degrees latitude and 5 km 
+altitude.
+
+Further information in the README file.
+
+The files described in README were downloaded from the SPARC
+data centre 2002-08-13 (www.sparc.sunysb.edu/html/fleming.html).
+
+
+The files sht.dat and nht.dat have been used to create xml files
+giving temperature and geometrical altitude as a function of pressure,
+for different months. This was done by create_cira_xml.m, found in
+this folder. The function modifies the data in some ways:
+
+* Data for latitudes +-80 deg have been copied to +-90 deg, to
+  cover all possible latitudes.
+
+* CIRA does not contain temperatures for some low altitudes above
+  Antarctica (no data available as always covered by ice). The
+  temperature for lowest OK altitude has been copied to all "empty"
+  positions".
+
+* Altitudes have been calculated by *zt2p*, instead of using CIRA's
+  own altitudes as they are only approximative (and geopotential
+  instead of geometrical). A complete dry atmosphere, and that 1013
+  hPa equals 0 m, are assumed when calculating hydrostatic equilibrium
+  by *zt2p*.
+
+Patrick Eriksson
+2007-11-01
\ No newline at end of file