WMOD00593

• Contract/Permit #: 14-06-D-7052
• Title: Ecological Impacts of Snowpack Augmentation in the San Juan Mountains, Colorado
• Date: 3/1/1976
• State: CO
• Weather Modification - Doc Type: Report

t-
Z
W
U
~
~
w
o
u

z
o

~
...J
W
a::
a::
o
u

+.6
+.4
+.2
o
-.2
-.4
-.6

PRECIPITATION
A V i
l. - - -;: - - -=- -~- -:- 6" -"6-1" -~- - -1- - ~
A . rr 0 X
o 0 A 0
o X A X
----X- - - - - - - - - - - - - -Jt--

Tree -Ring Sites

SJS I - A
SJS 2 - 0
SJ S 3 - x

TEMPERATURE

+.6
+.4
+.2
o
-.2
-.4
-.6

~

o

x
o
A

~

A

t

X>

A

A

o
A 0 It
__i.-_

A

o
X

x
---&.-..

~ ---L

A

Jly. Aug. Sep. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May Jun. Jly. Aug. Sep.

Figure 4. Monthly correlation coeffieients of Pagosa 5prings precipitation and temperature with 5an Juan
study tree ring sites (5J5): 5J5-1, 5J5-2, and 5J5-3. Values outside dashed lines indicate
significance at 0(= 0.05 level.

+.6
+.4
+.2
t- O
z -.2
w -.4
u
~ -.6
~
w
0
u
z
0
t-
<t +.6
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w +.4
a:: +.2
a::
0 0
u
I -.2
I, -.4
( -.6
I

PRECIPITATION

A X A
o 0
_____ __~--- _ _ __~-x-- --_
6 A A A ~ 0

A

----~-~

----,------

Tree - Ring Sites
SJS I - A
SJS 2 - 0
SJS 3 - x

TEMPERATURE

x

-0..-- _ _
X A
A

---~
o
A

o 0 x
- - 0- - ~- - i- - - --!.- - - - ~ ~ - ~
~ A ·

Jly. Aug. Sep. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May Jun. Jly. Aug. Sep.

Figure 5. Monthly correlation coefficients of Vallecito Dam precipitation and temperature with 5an Juan
study tree ring sites (535): 535-1, 535-2, and 535-3. Values outside dashed lines indicate
significance at 0(=0.05 level.

77

'..