WMOD00288 ‎(2)‎

• Title: Twelve Basin Investigation - Volume I
• Prepared For: Bureau of Reclaimation
• Prepared By: Robert D. Elliot, Jack F. Hannaford, Russell W. Chaffer
• Date: 5/15/1973
• Weather Modification - Doc Type: Report

Table 1. 2-1. Regression equation for pressure at nodal surface.

r- OH 1 fVH 1 2 r l2
PVF - PNS - 2(PVF - POC} i 02H - PVF P~ 1+ i I V2H !
+ i +
= an a, In 4- a2 Iv I a3 -I
T"\'tn:" TlLY1 ()
rvc - r.L\\J v_ ,
v ... , "2H . "H POC V ~ I L of J l . f .J
l- F
r 02H i 2 [ V -14 [ V 2H 14
- OH I
+ a4 PVF - POC I + HI
I a5 v;J + a6
l 02H + OH POC vF2 J VF J

Pressure tenus (PVF, PNS, PVF, POC) are identified in text. H is the height of the ridge crest above the

I-'
I
.....

'~lal1ey floor, arid 2H is tIle l"u3igllt at \&lhich the pressure difference from the valley floor is double the

difference from floor to crest. Po~ential temperatures, 0, are taken at ridge crest and at 2H; scalar
wind speeds (m/s) are taken at valley floor, ridge crest, and at 2H. g was determined from the intersec=
tion of the moist adiabat at the specified level with the 1000 rob. surface.

Only four tenus:

o

o

a6
o

Coefficients:

ao
.55618

al
-3171. 3

a2
.04455

a3
-.02110

a4

a5

All seven tenus:

.68471

-4817

.11568

-.05862

9,782,890

-.00190

.00043

~.

';::l~---::-:;.