Agriculture Reference
In-Depth Information
Box 1.1 (
cont.
)
100
Los Angeles, CA
40
80
30
60
20
40
10
20
0
0
J
FMAMJ J ASOND
Jerome, AZ
40
80
30
60
20
40
10
20
0
0
J
FMAMJ J ASOND
100
Chihuahua, Mex
40
80
30
60
20
40
10
20
0
0
J
FMAMJ J ASOND
Month
Fig. B1.1.1
Climate diagrams contrasting the mediterranean-type climate of Los Angeles,
California, USA, with two other non-MTC regions in western North America all with MTV
(solid line, monthly precipitation; dashed line, monthly mean daytime temperature; area
filled with hatching, periods when precipitation exceeds evaporation; dotted area, period
when precipitation < evaporation): Los Angeles, California (100 m, 34
ο
5
0
N, 118
ο
5
0
W),
Jerome, Arizona (1600 m, 34
ο
5
0
N, 112
ο
7
0
W), and Chihuahua, Mexico (1350 m, 28
ο
2
0
N,
105
ο
7
0
W). In addition to differences in seasonal distribution of precipitation, the annual
variance in precipitation is much greater in California than interior regions. For example,
40 years of data for Los Angeles showed 5 months with a coefficient of variation
between 220% and 350%, whereas the Arizona site had no month with more than 120%
.
(From Keeley
2000
.)
Continued
