< 100
> 300
0
20
0
20
< 30
1
II
2
W
z
270
090
h
P
Z
4
5
g
IV
f
3
III
e
j
200
r
Rive
d
200
k
c
I
< 30
A
Clay
Hollow
ti
ec
n
on
b
C
< 100
V
<5
> 300
0
20
a
X
Indian
Pond
> 300
m
Figure 9. Enlarged map section showing topography (from USGS 7.5-minute quad-
rangle) of the area where large morning air temperature differences were observed.
The symbols coordinate this figure with those in Parts I and III. The stippled layer
lies 5 to 30 m above river level, the hatched layer 30 to 100 m above river level, and the
alternate hatched layer 300 m above river level.
It is also necessary to critically examine the
bic numerals are used to designate individual tem-
relationship among measured snow depth (Baker
perature observation points cited in the text, tables,
et al. 1991, 1992), observed snow cover, and in-
or figures.
ferred vertical temperature structure to support
objective analysis of the influence of snow cover
(Namias 1985) and local features on temperature
ANALYSIS OF VERTICAL
difference. A quasi-simultaneous set of tempera-
TEMPERATURE STRUCTURE
ture observations were made on winter mornings
IN THE STUDY AREA
in varying terrain along a curved path within 6
km of the Connecticut River, in the area east of
The temperature differences along the path P
the Piermont bridge along PWA in Figure 9.
WA, with respect to the temperature (Tp) at the
Figure 9 shows detail of this transect route, within
bridge P, were stratified to produce 10 quasi-ho-
the experiment area defined in Part I. The coordi-
mogeneous data subsets. The temperature differ-
nated designators are again noted. Roman nu-
ence WA was again used to identify apparent
merals are used to designate small basins in Figure
lapse or inversion structure over the study area.
9; capital letters designate fixed observation sites,
The mean temperature difference at each obser-
or important landmarks, along the measurement
vation point was calculated for each subset; the
path cited in the text. Lower case letters and Ara-
five subsets corresponding to lapse conditions are
14
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