Group Title: Climatological report for Range Cattle Experiment Station, University of Florida
Title: Climatological report.
ALL VOLUMES CITATION PDF VIEWER THUMBNAILS PAGE IMAGE ZOOMABLE
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00075797/00027
 Material Information
Title: Climatological report.
Series Title: Climatological report.
Physical Description: Serial
Publisher: Range Cattle Station,
Publication Date: 2000
 Record Information
Bibliographic ID: UF00075797
Volume ID: VID00027
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 143383408

Downloads

This item has the following downloads:

00001 ( PDF )


Full Text


Range Cattle Research and Education Center
Research Report RC-2001-1
January 2001



CLIMATOLOGICAL REPORT 2000


Range Cattle Research and Education Center


R. S. Kalmbacher
Professor, IFAS, Range Cattle Research and Education Center, Ona, Florida.


Weather conditions strongly influence agricultural operations from planting through harvesting. Knowledge of annual
rainfall and temperature cycles along with their extremes help producers determine optimum times to prepare and
plant seedbeds, fertilize pastures, apply herbicides, control water, and to supplement cattle on pasture or range.
Weather conditions influence germination, forage growth, palatability, and nutritive value. A knowledge of weather cycles
and extremes is helpful to a successful cattle operation.

This research report presents a summary of rainfall, air temperature, evapotranspiration, and solar radiation for 2000
obtained at the Range Cattle Research and Education Center (REC) Ona, Florida. The center is located 820 55' W and 270 26'
N in south central Florida approximately 45 miles (72 km) east of the Gulf of Mexico and 100 miles (160 km) west of
the Atlantic Ocean.

Weather observations were collected with a Weather Watch 2000 (Campbell Scientific, Inc). Accuracy of rainfall as
measured by the Weather Watch 2000 was checked by comparing with rainfall measured by a US Weather Service
standard gauge.

Rainfall:

Annual rainfall for 2000 was 32.02 inches, which was 21.13 inches (40%) less than the 59-year average (53.15 inches).
The driest year had been 1956 when 36.73 inches were measured, and the year with the greatest rainfall was 1959, when
78.82 inches were recorded.


Table 1. Weather at Range Cattle REC, 2000.








Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

23
24
25
26
27
28
29
30
31


January
Max Min Rain MJI
oF "F inches m:
77 57 0.00 12.10
81 57 0.00 12.10
80 56 0.00 14,69
82 59 000 12,96
82 56 0.00 12.10
69 56 0.00 12 96
82 64 0.00 9.50
80 63 0.00 12 10
79 57 0 00 950
81 I9 0.00 13.82
81 65 0.18 12.10
78 44 0.00 16.42
81 47 0.00 15.55
80 54 000 15.55
67 44 0.00 16.42
69 46 0.00 15.55
72 41 000 15 55
73 45 0.00 16.42
73 53 000 1469
76 60 0.00 12.10
76 37 0.00 10 37
62 36 0.00 17 28
73 46 000 16.42
77 5 1.95 14.69
67 41 006 .864
58 34 0.00 1037
54 30 0.00 17.28
59 38 0,00 1728
71 52 0.00 12 9
79 53 0.00 13.82
79 57 0.00 15 55


w I


February
Max Min Rain MJ/
F F inches m:
58 48 0.14 2.59
66 49 0.03 12.96
61 49 004 7.78
64 46 0 13 5,18
71 41 0.00 17.28
62 34 000 19.01
69 41 0,00 19.01
73 46 0,00 18.14
71 43 0.00 10.37
69 37 0 00 18.14
72 39 0,00 18.14
76 43 000 18,14
78 49 0.00 18.14
81 61 000 13.82
80 54 002 950
82 48 0.00 19.01
84 54 0.00 18.14
84 53 0,00 19.01
85 56 0.00 15.55
83 61 001 15,55
81 48 0.00 16.42
74 52 0 00 20.74
79 52 000 18.14
78 '3 000 12.10
77 55 000 14.69
81 56 000 17.28
83 55 000 20.74
83 56 0.00 17.28
82 52 0.00 19.01


March
Max Min Rain MJ/
F OF inches m2
82 50 0.00 20 74
80 54 000 17.28
81 57 0.01 19.01
80 59 0.00 16.42
80 45 000 1642
80 46 000 2160
82 54 0.00 2160
80 55 0.00 18.14
79 56 0.00 14 69
82 57 000 17.28
84 59 0.00 1901
83 67 0.00 18.14
80 47 000 19.87
79 50 0.00 22.46
S1 55 000 22.46
82 b3 0.00 15.55
84 59 0.02 14.69
82 50 000 12 96
84 66 1.13 19.01
75 65 0.00 8.64
S3 55 000 20.74
84 52 0.00 23.33
85 54 0.00 22.46
78 60 0,00 22.46
80 56 000 18.14
82 55 000 22.46
77 62 0.00 13.82
80 60 0.29 12.96
80 53 0.00 24.19
87 64 0.00 24.19
85 70 001 19.87


Avg 74 50 13.22 75 49 15.58 81 57 1873 82 55 23.16
Max 82 65 1.95 17 28 85 61 0.14 20.74 87 70 1,13 24.19 88 72 1,33 27,65
M n 54 30 0 8 4 58 34 0 2 59 75 45 0 8.64 71 38 0 6.91
Total 2 19 426 82 0.37 451.87 1.46 580.61 2 59 694.66


April
Max Min Rain MJ
f *IF inches mr
86 62 0.00 17.28
87 60 0.00 21 60
86 60 000 23 33
86 62 0.00 24.19
82 47 002 1296
72 38 000 27.65
81 48 0.00 27,65
82 53 0.00 25,06
83 46 000 23 33
.71 45 000 27.65
79 55 000 26.78
82 61 000 25 06
85 58 0.16 1001
84 64 133 13.82
72 62 0.18 691
82 62 090 18,14
87 63 0.00 23.33
83 61 0,00 26,78
80 53 0,00 26.78
84 58 000 26,78
88 5 000 26,78
82 58 000 22.46
79 47 0.00 27,65
83 42 0.00 25.06
85 72 000 2160
83 40 000 22.46
79 47 000 27.65
81 46 0,00 27,65
80 61 0.00 24.19
85 50 000 25 06






-,L II I ~II


Day
I
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31


June
Max Min Rain MJ/


May
Ma\x Min Rain MJ/
TF F inches m2
85 5n 0,00 27.65
85 57 0.00 25.06
86 56 1- 0(J 22.46
84 60 0.00 17.28
85 59 0,00 27.65
86 55 0.00 25 92
85 60 0.00 21 6(l
85 63 0.00 16.42
90 67 0.00 24.19
88 63 0.04 19.01
90 64 0.00 24,19
92 63 0.00 25 92
94 66 0.00 26,78
91 70 0.00 22 46
90 64 0.00 19.87
91 66 3 00 25,06
91 62 0.00 25.92
0o 58 0 00 25.06
91 60 ,3 00 25,92
91 55 1 00 27,65
92 61 0.00 27.65
91 66 0.00 24.19
88 65 0.00 22.46
89 65 0,01 24.19
91 67 0.00 25.92
93 65 0.00 23 33
95 72 0.00 23.33
97 70 0.00 25.92
95 67 0 00 2765
:92 ( 000 24 19
95 67 000 2506


"F "F
92 66
94 66
96 66
98 67
97 66
94 66
:3 69
91 68
89 65
91 63
90 65
87 68
93 67
95 70
95 70
94 70
95 72
96 68
96 68
94 68
)4 67
93 68
92 68
88 70
90 67
91 70
87 69
85 70
60 70
87 72


inches ra
0.00 24 19
0.00 25 )06
0,00 27,65
0.00 22.46
0.00 25.92
0,00 25,06
0,00 23.33
0.00 14 69
0.06 17.28
0,00 24.19
0.00 21,60
0,23 18.14
0.02 20.74
0 03 19,87
0.04 19,87
0.00 21.60
0 00 22.46
0.41 19.87
0.03 23.33
0.14 20.74
0.45 19 87
0.00 23.33
0.05 1 14
1.19 13.82
0.01 21 60
0,40 16.42
0 17 12 10
0.55 7.78
000 2246
000 2333


OF F
88 72
81 70
90 71
90 71
91 69
89 69
95 72
91 75
88 70
92 71
93 69
96 70
95 70
92 73
89 72
81 71
91 73
02 73
90 75
92 75
93 73
92 71
86 73
89 70
86 70
89 70
93 68
91 71
93 71
93 70
88 60


Max Min Rain MJ/


inches m:
002 1901
0.10 9.50
0.00 23.33
000 22.46
0.09 19.01
000 1901
0.00 23.33
0.00 19.87
0.22 12.9
0.00 23.33
0 00 25 b
0.00 26.78
0.00 22.46
0.00 25.06
0,02 17.28
056 4.32
0,00 2333
0.00 25 92
0.42 15.55
000 19.87
0.01 23.33
1,45 1555
012 1469
0.27 22.46
0.23 12 10
0.77 17 28
0.00 21 60
0.00 1901
0 00 2419
0 22 23 33
000 1296


Avg 63 24 19 91 fi6 20 56 90 71 1948 91 70 20,43
Max 97 72 0.04 27.65 98 72 1.19 27.65 96 75 1.45 2678 95 73 1 58 25.06
Min 84 5u 0 1642 60 63 0 7.78 81 68 0 432 79 65 0 6.91
Total 005 74995 378 61690 4 0 60394 5.35 633 31
IL --


AX
Max
"F
93
91
89
92
93
94
90
)3
93
90
93
91
79
39
90
89
91
t1
93
95
94
94
89
94
94
oi"
92
91
91
85
91


t
Min Rain NMiu
TF inches m
71 0.53 23 33
69 0,94 23.33
09 006 1987
73 000 23.33
73 0.00 25 06
71 0.21 22,46
72 0.39 14.69
72 0 00 24.19
59 0.00 24 19
69 0.00 22.46
70 0 00 22.46
73 012 23.33
72 0.53 8.64
73 0 06 20.74
71 0,16 17.28
71 007 1901
65 0,00 24 19
67 000 24.19
69 0,00 23.33
70 0.00 24.19
69 000 18.14
71 000 22.46
72 0.00 12.10
73 0.07 1987
70 0.00 19.01
70 0.63 20.74
68 0.00 17.28
68 0 00 23.33
71 000 22.46
72 1 58 691
71 000 2074


"'









Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31


4 36
0
8.03


September
Max Min
[ F
88 75
91 73
92 70
93 71
)91 71
89 71
90 71
91 71
92 72
8g 741
93 71
91 66
91 68
94 71
93 70
91 73
81 67
79 69
M6 71
91 76
M9 75
91 76
91 73
94 73
93 71
94 70
90 73
91 72
86 70
89 72


17.63
23 32
5 1
528.7T


Rain
inches
000
0.00
00
0.16
0.00
0.79
0.04
0.75
0.06
0.00
0 00)
0 00
0 010
000
0 01)
0.00
4.36
0 55
0.14
0.01
0.61
3 IH1
0.00
0.33
0.00
0.00
0.00
0 23
0,00
0.00


84 61
89 74
7] 47


MJ/
mi
172,
18.14
21.60
18.14
21.60
17 2
15.55
17.28
20.74
12 10
21 60
20.74
23 33
22.46
19.01
15.55
5.18
9.50
16.42
18.14-
12.96
17.28
15,55
1987
19.01
19.87
19.01
15.55
19.01
1901


I 67
0
223


October
Max Min
OF "F
86 68
87 69
88 74
,84 72
S8 72
89 70(
X8 71
88 66
85 61
71 51
78 61
81 62
83 59
83 60
84 61
82 51
X3 49
83 52
84 54
85 57
85 62
86 62
84 62
83 66
84 63
81 63
83 56
81 47
84 52
85 5,4
85 61


16641
1987
9 50
51581


__ _I __ L


Y


Rain
inches

0.00
000
0.54
0.00
0.02
1.67

0.00

0.00
0 00
J 00
0.00




0.00
0,00

0.)


M 00
0.00
0.00
0.00
0 00
0.00

0.00
0.00
0.00
0 00
(000
0-0(0
0j.00


79 53
87 66
64 29


MJ/

12.10
1814
15.55
9.50
13.82
13.82
10.37
18 14
16.42
15.55
18.14
19.01
19.01
19.01
17.28
19.87
19.87
19.87
19.01
18.14
15,55
1642
15.55
17.28
16.42
16.42
1642
18 14
18.14
1728
15 55


13,56
0 17 18.14
0 5.18
0.34 406 94


November
Max Min
"F OF
82 46
82 53
81 49
82 51
83 51
83 60
84 61
86 60
87 62
84 66
84 51
78 49
78 50
82 60
81 44
71 47
81 61
83 59
81 60
83 56
68 44
64 29
68 42
69 49
80 63
81 66
71 51
71 39
74 51
77 50


74 50 11,93
86 68 074 15.55
50 28 0 3.46
1.13 369.79


There were no records broken for low rainfall totals for individual months, but every month in 2000, except September
with 8.03 inches (compared to the 59-year mean of 7.13 inches), had lower rainfall compared to the 59-year mean for
that month (Tables 1 and 2, Figure 1). There were only eight occurrences during the year when daily rain exceeded 1 inch.


Rain MJ/
inches m'
0.00 17.28
0.00 18.14
000 17.28
0.00 17.28
0.00 15,55
0.00 14.69
0 )0 15.55
000 13.82
0,00 14.69
0U0 12 9l6
0.00 9 50
0.00 16,42
0 00 17.28
0.00 12 10
0.09 6 91
0.00 17.28
0.00 16.42
)(i3 12 96
:)00 13,82
000 11.23
0 00 11.23
0.00 17.28
0.00 16.42
0.00 9 50)
0.00 11.23
0 04 6.05
0.17 5.18
300 15.55
0.00 13.82
0.1tl 9 50


90 72
9- 76
79 66


December
Max Min Rain MJI
F F inches m2
76 47 0,00 15.55
79 52 0,00 1469
79 46 000 12 %
68 42 0 00 10.37
67 48 0.00 12,96
70 45 0.00 14,69
73 50 0.00 12.10
73 51 0.00 13 82
82 55 0.00 12 9
83 60 0.00 1296
83 68 0.00 10.37
80 63 0.02 6.91
83 62 0.00 10 37
86 66 0.00 11.23
86 66 0.00 10 37
36. 63 0.00 11.23
85 67 0.27 11,23
69 33 0.00 13,82
70 34 0.00 15.55
69 33 0 04 6,91
50 28 0.00 15.55
64 43 0.00 12.96
70 45 000 12.10
75 52 0.00 1296
74 51 00 12 10
75 50 0.00 12.96
75 47 0.00 12 96
77 56 006 12 10
74 52 0.74 3,46
57 38 0.00 605
56 28 0.00 15.55


A1v
Max
Min
Total





The single greatest daily rain event was on September 17 when 4.36 inches were recorded (13.5% of annual rainfall).
Limited rain resulted in none of the typical flooding in pastures, and most maidencane (Panicum hemitomon) ponds
and drainage ditches remained dry as well.

Table 2.Summary of rainfall by months. Range Cattle REC, 2000.
1942 to 2000 2000
Maximum Minimum 59-yr Total Diference from
month month Average 59-yr average
S------------------inches*------------------
January 8.45 0.03 2.26 2.19 -0.07
February 9 .59 0.13 2.55 0.37 -2.18
March 12.34 0.13 3.20 1.46 -1.74
April 11.91 0.00 2.52 2.59 +0.07
May 10.58 0.00 3.77 0.05 -3.72
June 18.99 2.79 8.33 3.78 -4.55
July 19.74 1.87 8.43 4.50 -3.93
August 15.72 3.13 7.96 5.35 -2.61
September 20.11 1.14 7.13 8.03 +0.90
October 11.23 0.04 3.16 2.23 -0.93
November 11.22 0.07 1.93 0.34 -1.59
December 8.61 0.16 1.91 1.13 -0.78
Year total 53.15 32.02 -21.13
*Inches x 2.54 = cm.









10

9 2000
-8 I- 59-yr avg.

7

6-

o 5

4








Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Month




Total 2000 rainfall=32.02 vs. 59-yr average=53.15


Figure 1.Monthly 2000 rainfall at the Range Cattle REC compared to the 59-year mean rainfall at Range Cattle REC.

Evapo-transpiration

Evapo-transpiration exceeded rainfall in 9 months during 2000 (Figure 2). Only during July to September did rainfall
exceed evapo-transpiration. For the year, evapo-transpiration exceeded rainfall by 10.8 inches.







10

9" Rain total=32 02"
8"[ Evapo-transpiration=42 80"

7

a 6
C
u 5










Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Month



Figure 2. Monthly rainfall compared with evapo-transpiration during 2000.


Temperature:

The average low shelter temperature was colder for eight months compared with the 57-year average for that month (Table
3). The annual average low shelter temperature for 2000 was 1VF colder than that for the 57-year period. There were four
and nine days when extreme daily low shelter and ground temperatures, respectively, dropped below 32F.


Table 3. Summary of minimum temperature (OF)* by months, Range Cattle REC.
Shelter Temperature Ground Temperature
1944-00 2000 1944-00 2000 2000
Avg. Avg. Extreme Yr Extreme Avg. Extreme
Low Low Low Low Low Low
SJanuary 49.5 50.5 18 1981 30 48.2 27
February 50.5 49.3 26 1976 34 46.7 30
S March 54.3 56.9 26 1980 45 54.0 43
April 58.1 55.2 34 1971 38 52.8 35
May 63.3 62.8 43 1945 50 60.2 46
June 68.8 68.0 52 1984 63 65.9 60
July 71.1 71.2 62 several 68 69.5 66
August 71.7 70.5 61 1977 65 68.6 63





September 71.0 71.5 56 1962 66 69.9 64
October 64.6 60.9 42 several 47 59.0 45
November 56.8 52.7 25 1970 29 49.7 27
December 51.1 49.7 20 1962 28 47.4 25
Avg. 60.9 59.9 46.9 57.7 44.3
oC =( F 32)x 0.555


Solar Radiation:

Daily solar radiation is shown in Table 1, and 2000 total monthly solar radiation can be seen graphically in Figure 3.
For interpretation of solar radiation as it pertains to plant growth, 1 MJ results in about 14.3 lb/A of plant dry matter if
soil water, temperature, and fertility are not limiting and vegetative cover is complete. Theoretically, enough solar
radiation was received in May 2000 (750 MJ) to produce 10,725 lb/A of plant dry matter. Total solar radiation for 2000
was 6579 MJ.


800

700

600

500

400

300

200

100

0


Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Month


Figure 3. Total monthly solar radiation for 2000.


Freeze hazard:

The fall and spring freeze hazards for the Range Cattle REC are shown in Figures 4 and 5, respectively. The fall freeze
hazard shows the chance of experiencing the first attainment of a critical temperature before a selected date, while the
spring freeze hazard shows the chance of the last attainment of a critical temperature before a critical date. Based on
records from 1944 to 1991, these data will not predict what will occur in a given year, but what can be expected over a
period of years. In an example using the spring freeze hazard, a frost susceptible crop (assuming 32F) planted before the 1st





of February would stand a 50% chance of survival (Figure 4). A grower would probably lose five crops over 10 years
by planting before the 1st of February.

100.--- --

/0 .- ^-" ,""- ..


TO O

/ 35 F/

3 2/ 32 E9
r / / 28
i-o -/----^ ^ -^----


DI1EB


Figure 4. Fall freeze hazard showing the chance of the first attainment of a given temperature before a selected date.


~IRI~Y ~rYerYLLT~ 1 """' 7~ ----- ~ PI I

















'40'

'40
.


0 .J 45 F'
-.-----""- .--.--

10. ._hij




I -1


Figure S.Spring freeze hazard showing the chance of the last attainment of a given temperature before a selected date.

Acknowledgments:
We gratefully acknowledge data collections by Shirley Searcy, as well as data preparation by Lisa Roberts.



SBack to the Publications Page




University of Florida Home Page
© 2004 - 2010 University of Florida George A. Smathers Libraries.
All rights reserved.

Acceptable Use, Copyright, and Disclaimer Statement
Last updated October 10, 2010 - - mvs