This
century
could
____________________
(
see
)
the
Arctic
Ocean
without
the
cap
of
sea
ice
during
the
summer
.
A
new
study
____________________
(
conclude
)
that
an
open
-
water
Arctic
in
summers
could
be
more
likely
in
this
century
than
had
been
____________________
(
stimate
)
in
the
latest
international
review
of
climate
research
____________________
(
release
)
in
February
.
The
largest
area
of
sea
ice
can
be
____________________
(
see
)
in
September
.
The
maximum
and
minimum
area
of
Arctic
sea
ice
,
which
typically
____________________
(
expand
)
most
in
March
and
____________________
(
shrink
)
most
in
September
.
Since
the
fifties
,
the
area
of
sea
ice
is
____________________
(
decrease
)
at
a
rate
of
more
than
7%
every
ten
years
.
Dr
.
Stroeve
____________________
(
find
)
that
since
1953
the
area
of
sea
ice
in
September
has
declined
at
an
average
rate
of
7
.
8
per
cent
per
decade
.
