Deutsche  Hydrographische  Zeitschrift  -  German  Journal  of  Hydrography

156

depth  [mj  depth  [mj

salinity  [PSU]
34.715  34.720  34.725  34.730

t-pot  [grd  C]

t-pot  [grd  C)

salinity  [PSU]
34.715  34.720  34.725  34.730

t-pot  [grd  C|
Fig.6:  Near-bottom  CTD  profiles  of  stations  8,  9,  and
10  showing  potential  temperature  (solid  line)
and  salinity  (broken  line).  The  arrows  mark  the
top  of  an  eroded  bottom  mixed  layer.  The  small
arrow  at  station  9  marks  the  top  of  the  present
BML.  The  position  of  the  stations  is  shown  in
Fig.2.
three  profiles  were  taken  at  the  SEDIPERU  site  with
a  KMS  6000  multisonde  manufactured  by  ME  Meerestechnik
  Elektronic  (Fig.  6).  One  profile  was  taken
on  top  of  a  250  m  hill,  another  one  at  the  foot  of  the
hill  running  1.5  nm  to  the  east,  and  a  third  profile
another  1.5  nm  to  the  east  in  the  abyssal  plain  very
close  to  the  MK1  position  (see  Fig.  2).  Profiles  9  and
10  stopped  at  about  2-3  mab,  profile  8  at  about
10mab  because  an  additional  chemical  sampling
system  hung  suspended  from  the  CTD.  All  profiles
were  taken  within  12  hours  in  a  period  of  extremely
low  velocities.  Nevertheless,  there  is  a  weak  BML  of
at  least  150  m  height  at  all  positions.  The  top  of  the
BML  is  indicated  by  an  arrow  in  Figure  6.  It  is  the
point  where  the  slope  of  the  curve  changes  due  to
bottom  mixing.  If  the  BML  were  homogeneously