Document ID: EPA-HQ-OAR-2003-0061-0700
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2005-04-06T04:00Z

April
15,
2003
Kansas
Agricultural
Fires
Chattanooga
Tennessee
did
not
provide
any
trajectory
analyses.

Back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1500
m
and
2468
m.
The
trajectories
indicate
that
except
at
the
top
of
the
mixed
layer,
air
within
the
mixed
layer
over
Chattanooga
came
from
Georgia
and
circled
around
back
through
Tennessee,
Kentucky
and
Illinois
but
did
not
originate
in
Kansas.
The
top
trajectory
indicates
it
could
have
originated
over
Kansas
4
to
5
days
prior
to
April
15.
Fires
over
Kansas
around
April
10,
2003
would
need
to
be
shown
in
order
to
provide
any
evidence
of
an
impact
upon
Chattanooga.

June
26,
2003
Canadian
Fires
from
Western
Ontario
Chattanooga
did
not
provide
any
trajectory
analyses.

Back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1000
m
and
1908
m.
The
trajectories
inicate
air
within
the
mixed
layer
over
Chattanooga
was
rather
stagnant
and
came
from
the
south
and
southeast
around
Georgia
and
Florida
coastal
areas,
not
from
Canada.

June
29,
2003
Canadian
Fires
from
Western
Ontario
Chattanooga
did
not
provide
any
trajectory
analyses.

Back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1000
m
and
2020
m.
The
trajectories
indicate
that
air
at
low
levels
of
the
atmosphere
was
nearly
stagnant
and
meandered
around
Alabama
and
Georgia.
However,
near
the
top
of
the
mixed
layer
the
air
was
shown
to
have
come
from
central
Canada.
Although
only
one
trajectory
supports
it,
it
does
indicate
that
smoke
from
the
fires
in
Ontario
could
have
transported
down
to
Tennessee
and
could
have
entrained
into
the
mixed
layer
to
the
surface
in
Chattanooga.

August
19,
2003
Canadian
Fires
Chattanooga
did
not
provide
any
trajectory
analyses.

Back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1000
m,
and
1679
m.
Trajectories
do
indicate
that
the
air
within
the
mixed
layer
over
Chattanooga
may
have
originated
in
south
central
Canada
3
to
5
days
prior
to
August
19.
However,
there
were
no
satellite
photographs
in
the
supporting
documentation
to
indicate
whether
smoke
was
over
south
central
Canada
or
not
during
that
same
time
period.
August
22,
2003
Canadian
Fires
Chattanooga
did
not
provide
any
trajectory
analyses.

Back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1000
m
and
1697
m.
The
trajectories
do
not
show
any
evidence
of
originating
in
Canada
within
the
120
hour
run.
They
remain
within
the
southeast
and
midwestern
regions
of
the
U.
S.
Although
TOMS
satellite
photographs
show
smoke
from
Canada
traveling
near
Tennessee,
the
trajectory
evidence
does
not
support
the
smoke
entraining
down
into
the
mixed
layer.

August
25,
2003
Canadian
Fires
Chattanooga
did
not
provide
any
trajectory
analyses.

Back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1000
m
and
1294
m.
This
analysis
does
provide
evidence
that
smoke
from
the
Canadian
fires
may
have
impacted
Chattanooga.
Trajectories
originate
in
south
central
Canada
3
to
5
days
prior
to
their
potential
impact
with
Tennessee.
The
TOMS
satellite
photographs
indicate
smoke
in
south
central
Canada
at
the
same
location
as
the
trajectories
at
the
same
time
3
to
5
day
period
prior
to
the
potential
impact
over
Tennessee.
It
is
uncertain
whether
the
smoke
over
that
region
was
at
the
same
height
as
the
trajectories
though.

August
28,
2003
Canadian
Fires
Chattanooga
did
not
provide
any
trajectory
analyses.

Back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1000
m
and
1723
m.
The
trajectories
do
not
show
any
evidence
of
originating
in
Canada.
They
remain
within
the
southeast
and
midwestern
regions
of
the
U.
S.
June
8,
2004
Arkansas
Agricultural
Wheat
Fires
Chattanooga
performed
a
trajectory
analysis
using
FNL
low
resolution
data
which
is
not
the
recommended
data
set
for
this
analysis.
They
used
start
heights
of
7000
m,
6500
m
and
6750
m.
These
start
heights
are
inappropriate
because
they
are
well
above
the
calculated
mixed
layer.

More
appropriate
back
trajectories
were
performed
using
EDAS
high
resolution
data
and
start
heights
of
500
m,
1000
m
and
1834
m.
These
trajectories
show
evidence
against
any
smoke
from
Arkansas
moving
over
Chattanooga
and
affecting
the
mixed
layer.
The
trajectories
come
from
a
southeast
direction
near
the
Georgia
and
Florida
coasts,
not
from
a
westward
direction
from
Arkansas.

June
11,
2004
Arkansas
Agricultural
Wheat
Fires
Chattanooga
performed
a
trajectory
analysis
using
FNL
low
resolution
data
which
is
not
the
recommended
data
set
for
this
analysis.
They
used
start
heights
of
9000
m,
8000
m
and
7000
m.
These
start
heights
are
inappropriate
because
they
are
well
above
the
calculated
mixed
layer.

More
appropriate
back
trajectories
were
performed
using
EDAS
high
resolution
data
and
start
heights
of
500
m,
1500
m
and
2154
m.
These
trajectories
do
not
show
any
evidence
of
originating
in
Arkansas.
They
indicate
that
the
air
meandered
throughout
eastern
Tennessee,
Alabama
and
Georgia
within
3
days
prior
to
June
11.

July
17,
2004
Alaskan
Fires
Chattanooga
performed
a
trajectory
analysis
using
FNL
low
resolution
data
which
is
not
the
recommended
data
set
for
this
analysis.
They
used
start
heights
of
4000
m,
5000
m
and
7000
m.
These
start
heights
are
inappropriate
because
they
are
well
above
the
calculated
mixed
layer.

More
appropriate
back
trajectories
were
performed
using
EDAS
high
reolution
data
and
start
heights
of
500
m,
1000
m
and
1484
m.
These
trajectories
originate
over
south
central
Canada
about
5
days
prior
to
July
17.
TOMS
satellite
data
shows
smoke
from
Alaska
traveling
down
into
south
central
Canada
about
2
to
3
days
prior
to
July
17.
According
to
the
trajectories,
the
timing
appears
to
be
off
to
provide
evidence
that
the
Alaskan
smoke
impacted
Chattanooga.
July
20,
2004
Alaskan
Fires
Chattanooga
performed
a
trajectory
analysis
using
FNL
low
resolution
data
which
is
not
the
recommended
data
set
for
this
analysis.
They
also
used
inappropriate
start
heights
of
3000
m,
7000
m
and
9000
m,
which
are
all
above
the
calculated
mixed
layer
height.

Appropriate
back
trajectory
analysis
was
performed
using
high
resolution
EDAS
data
and
start
heights
of
500
m,
1000
m
and
1834
m.
This
analysis
does
provide
evidence
that
smoke
from
the
Alaskan
fires
may
have
impacted
Chattanooga
Tennessee.
Trajectories
originate
in
south
central
Canada
5
days
prior
to
their
potential
impact
with
Tennessee.
The
TOMS
satellite
photographs
indicate
smoke
from
Alaska
at
the
same
location
in
south
central
Canada
as
the
trajectories
at
the
same
time
5
days
prior
to
the
potential
impact
over
Tennessee.
It
is
uncertain
whether
the
smoke
over
that
region
was
at
the
same
height
as
the
trajectories
though.

August
4,
2004
Alaskan
and
Canadian
Fires
Chattanooga
performed
a
trajectory
analysis
using
FNL
low
resolution
data
which
is
not
the
recommended
data
set
for
this
analysis.
They
also
used
inappropriate
start
heights
of
2000
m,
3000
m
and
4000
m,
which
are
all
above
the
calculated
mixed
layer
height.

Appropriate
back
trajectory
analysis
was
performed
using
start
heights
fo
500
m,
1000
m
and
1516
m.
Comparing
these
trajectories
with
the
satellite
photographs
does
indicate
that
the
smoke
from
the
Alaskan
and
Canadian
fires
could
have
impacted
Chattanooga.
The
trajectories
intersect
the
smoke
on
the
photographs.
There
is
some
uncertainty
about
the
height
of
the
smoke
and
whether
it
was
at
the
same
levels
as
the
trajectories.
August
10,
2004
Alaskan
and
Canadian
Fires
Chattanooga
performed
a
trajectory
analysis
using
FNL
low
resolution
data
which
is
not
the
recommended
data
set
for
this
analysis.
They
also
used
one
inappropriate
start
height
of
4000
m,
which
is
above
the
calculated
mixed
layer
height.

More
appropriate
back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1500
m
and
2138
m,
all
within
the
calculated
mixed
layer
height.
The
trajectories
do
not
provide
evidence
that
smoke
from
the
Alaskan
and
Canadian
fires
impacted
Chattanooga
based
on
the
satellite
photographs
provided.
The
day
before,
on
August
9,
the
trajectories
meandered
to
the
south
and
east
of
Chattanooga
when
the
satellite
photographs
indicate
the
smoke
was
north
and
west
of
Chattanooga
that
day.
Satellite
photographs
show
the
smoke
moving
across
the
state
of
Tennessee
from
the
northwest
to
the
southeast
which
appear
to
be
more
indicative
of
the
winds
at
higher
heights
above
the
mixed
layer.
There
is
some
uncertainty
that
the
trajectories
could
have
intersected
the
smoke
several
days
before
since
they
came
from
the
north,
but
satellite
photographs
were
not
provided
for
the
previous
days
so
it
could
not
be
verified.

August
16,
2004
Alaskan
and
Canadian
Fires
Chattanooga
performed
a
trajectory
analysis
using
high
resolution
EDAS
data.
They
used
an
inappropriate
start
height
of
6000
m,
well
above
the
mixed
layer.

Appropriate
back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1000
m
and
1784
m.
One
trajectory
does
originate
from
south
central
Canada
but
two
trajectories
do
not
and
they
remain
in
the
southeast
region
of
the
U.
S.
This
indicates
that
smoke
from
Canada
could
have
transported
south
to
Tennessee
although
only
one
trajectory
at
one
level
supports
it.

August
19,
2004
Alaskan
and
Canadian
Fires
Chattanooga
performed
a
trajectory
analysis
using
FNL
low
resolution
data
which
is
not
the
recommended
data
set
for
this
analysis.
They
used
start
heights
of
1000
m,
2000
m
and
3000
m.
The
3000
m
start
height
is
inappropriate
because
it
is
above
the
calculated
mixed
layer.
The
3000
m
start
height
trajectory
is
the
only
trajectory
that
originated
in
Canada.
The
other
lower
level
trajectories
remained
in
the
southern
U.
S.

More
appropriate
back
trajectory
analysis
was
performed
using
start
heights
of
500
m,
1000
m
and
2234
m.
These
trajectories
were
also
performed
using
high
resolution
EDAS
data.
These
trajectories
do
not
provide
any
evidence
of
smoke
transport
from
Canada
or
Alaska
and
the
trajectories
remained
in
the
south
and
central
regions
of
the
U.
S.