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CFC-11 Penetration into the Deep Ocean

Chlorofluorocarbons or CFC's are man-made pollutants which are extremely inert in sea water and detectable at very low concentrations. If they are found in deep ocean waters, some fraction of that water must have been in contact with the atmosphere since the 1930's, the time at which these chemicals were first introduced. CFCs are used by climate modelers to validate their computer models, particularly with respect to their representation of deep water pathways, by comparing model results with measured CFC concentrations. The following animations show CFC-11 invasion into the deep ocean over several decades, from 1951 to 1997.

         
         

CFC-11 .4 pmol/kg, Slice at 30° W

 

CFC-11 .04 pmol/kg, Slice at 30° W. Lon

 

CFC-11 Vertical Slice at 30° W

         
 

S.E. View, .04 isosurface

Quicktime | Real | MPEG

 

Slice at 30 degrees W. Lon

Quicktime | Real | MPEG

         
         

CFC-11 Horizontal Slice: -1.5 km

 

CFC-11: .7 pmol/kg

 

CFC-11: .4 pmol/kg

         

CFC-11 Top Plane Image

QuickTime | Real | MPEG

CFC-11 is most concentrated near Greenland and the Weddell Sea off of Antarctica.

 

QuickTime | Real | MPEG

 

CFC-11 Isosurface: .4 pmol/kg

QuickTime | Real | MPEG

         
         

CFC-11: .04 pmol/kg

 

Clock Display

   
         

CFC-11 Isosurface: .04 pmol/kg

QuickTime | Real | MPEG

 

clock image

  • Line 1: time of day (not used in these animations)
  • Line 2: year and day number (YYDDD)
  • Line 3: current frame number
   
         
         
Model  
Model Type:
Oceanic
Model Name:
Ocean component of NCAR Climate System Model (NCOM)
Data  
Data Size:
~1 GB
Start:
1961
End:
1997
Time Evolution:
46 years
Time Resolution:
Monthly Averages
Timesteps:
444
Supercomputer:
16 processor Cray YMP C90 (Antero)
CPU Time:
335 hours
Domain  
Atmosphere Layer:
Deep Ocean
Location:
Global
Spatial Resolution:
116x102x25
Research Project
Science:
Oceanography
Subject:
Ocean
Scientists:
Matthew Hecht, NCAR/CGD
Scott Doney, NCAR/CGD
Animators:
Tim Scheitlin, NCAR/SCD/VETS
Software:
Vis5D
Hardware:
Onyx2
Date Created:
2001-02-14
Date Catalogued:
2002-08-05
Rights:
© 2002, UCAR, All rights reserved.