102

Dl.hydrogr.Z.40.  1987  H  3.  Klein.  Benthic  storms

If  a  parcel  of  water,  which  can  be  distinguished  from  the  surrounding  water  mass,
comes  into  contact  with  a  xortex,  shear  leads  to  a  deformation  into  thin  filaments  which  can
be  wrapped  up  around  the  cortex.  Now.  small-scale  mixing  processes,  together  with  the
characteristic  diffusing  of  the  tracer,  flatten  out  the  concentration  to  a  more  eloudlike
distribution.
It  is  obvious  that  the  necessary  physical  conditions  for  the  aforementioned  exchange
mechanisms  arc  present  in  the  NOAMP  area.  A  more  detailed  analyses  of  these  processes
requires  better  information  about  the  vertical  transport  and  direct  measurements  of  lagrangian
  particle  dispersion.
The  next  step  will  concern  the  data  analysis  of  13  deep  Sofar-Floats,  which  were
released  in  the  NOAMP  area  in  May  '85  and  (taxe  been  tracked  over  more  than  one  year
These  data,  together  with  CTD  and  current  meter  measurements,  will  enable  a  more
quantitative  analysis  of  dispersion  and  exchange  processes  in  the  deep  sea.

Acknowledgements
This  work  was  supported  by  the  Bundesministerium  für  Forschung  und  Technologie  of
the  Federal  Republic  of  Germany,  grants  iVTFU  0519-9  and  MFU  0556-9.

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Eingegangen  am  2.  September  1987
Angenommen  am  23.  September  1987
Anschrift  des  Verfassers:
Holger  Klein.  Deutsches  Hydrographisches  Institut.  Bcmhard-Noclu-Straße  78,  20CX)  Hamburg  4