Studying
Ocean
Currents
Scientists
today
are
making
greater
effort
to
study
ocean
currents
(洋流).Most
do
it
using
satellites
and
other
high-tech
equipment.
However,
ocean
expert
Curtis
Ebbesmeyer
does
it
in
a
special
way--by
studying
movements
of
random
floating
garbage.
A
scientist
with
many
years’
experience,
he
started
this
type
of
research
in
the
early
1990s
when
he
heard
about
hundreds
of
athletic
shoes
washing
up
on
the
shores
of
the
northwest
coast
of
the
United
States.
There
were
so
many
shoes
that
people
were
setting
up
swap
meets
to
try
and
match
left
and
right
shoes
to
sell
or
wear.
Ebbesmeyer
found
out
in
his
researches
that
the
shoes
-
about
60,000
in
total
-
fell
into
the
ocean
in
a
shipping
accident.
He
phoned
the
shoe
company
and
asked
if
they
wanted
the
shoes
back.
As
expected,
the
company
told
him
that
they
didn’t.
Ebbesmeyer
realized
this
could
be
a
great
experiment.
If
he
learned
when
and
where
the
shoes
went
into
the
water
and
tracked
where
they
landed,
he
could
learn
a
lot
about
the
patterns
of
ocean
currents.
I
The
Pacific
Northwest
is
one
of
the
world’s
best
areas
for
beach-combing(海滩搜寻）because
winds
and
currents
join
here,
and
as
a
result,
there
is
a
group
of
serious
beachcombers
in
the
area.
Ebbesmeyer
got
to
know
a
lot
of
them
and
asked
for
their
help
in
collecting
information
about
where
the
shoes
landed.
In
a
year
he
collected
reliable
information
on
l,600
shoes.
With
this
data,
he
and
a
colleague
were
able
to
test
and
improve
a
computer
program
designed
to
model
ocean
currents,
and
publish
the
findings
of
their
study.
As
the
result
of
his
work,
Ebbesmeyer
has
become
known
as
the
scientist
to
call
with
questions
about
any
unusual
objects
found
floating
in
the
ocean.
He
has
even
started
an
association
of
beachcombers
and
ocean
experts,
with
500
subscribers
from
West
Africa
to
New
Zealand.
They
have
recorded
all
lost
objects
ranging
from
potatoes
to
golf
gloves.(共42张PPT)
Question 1: what is the style of the passage?Narrative Text
Argumentative Text
Descriptive Text
Expository Text
Question 2: what is the structure of the passage?
Scientists today are making greater effort to study ocean currents（洋流）. Most do it using satellites and other high-tech equipment. However, ocean expert Curtis Ebbesmeyer does it in a special way — by studying movements of random floating garbage.
