Environment of Earth

March 11, 2008

Global warming data tables

Filed under: Global warming — gargpk @ 1:15 pm
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Table 1: Trace gas characteristics and their estimated future impacts on atmospheric warming.

Characteristics

H2O

CO2

CH4

N2O

CFC-11

CFC-12

O3

Concentration (ppmv)

Pre-1850

1985 A.D.

2030 A.D.

Variable

Variable

Variable

275

345

450

0.7

1.7

2.3

0.28

0.30

0.38

0

0.22

1.1

0

0.38

1.8

Upto 25% less than now

0.1-1.0

Upto 12.5% more than now

Main IR absorption wavelength (m)

6.3-8.0

>15

4.3

15

3.3

7.6

4.5, 7.6

8.6

9.22

11.22

8.68-9.13

10.93

4.75

9.6

Observed (%) increase 1975-1985

Variable

4.6

11.0

3.5

103.0

101.0

Variable

Approximate lifetime in atmosphere in years

Variable

2

5-10

120

65

110

0.1-0.3

IR trapping (W m-2)

1985

2050

Variable

Variable

50

53

1.7

2.5

1.3

1.5

0.06

0.3

0.12

0.6

1.3

1.7

Estimated temperate increase (oK)

Variable

0.71

0.2-0.25

0.10

0.24

0.12

0.06

Table 2. Effects of differences in potential climatic changes from doubling of carbon dioxide concentrations in three global GCMs compared to present-day control.

(Data: Schlesinger and Mitchell, 1987)

Parameter

Season

Model NCAR

Model GISS

Model DFDL

MAXIMUM SURFACE WARMING

Latitude average (0C)

Northern Hemisphere

Southern Hemisphere

Geographical Location

Northern Hemisphere

Southern Hemisphere

DJF

JJA

DJF

JJA

7

13

16

18

7

7

10

18

14

7

18

14

LATITUDE OF MAXIMUM SURFACE WARMING

Northern Hemisphere (0N)

Southern Hemisphere (0S)

DJF

JJA

65

65

80

80

80

80

Tropospheric min.

Maritime warming (0C)

Both

2

4

4

Stratospheric max.

cooling (0C)

Both

-6

-3

-8

Precipitation, 300N-300S

Both

More to S

Less to N

More to N

Less to S

More to S

Less to N

Indian summer monsoon strength

Tropical rain rate increase (mm/day)

JJA

Both

Same

0.75

Lesser

1.25

Much more

0

SOIL MOISTURE CHANGE

Australia

Africa

DJF

JJA

Drier

Drier except N

Wetter

Wetter except N

Wetter

Dry in E wetter in W

DJF = December, January, February (Winter in Northern Hemisphere); JJA = June, July, August (Winter in Southern Hemisphere)

Table 3. Estimated average growth and yield changes in C3 species assuming a doubling of CO2 concentration. (SCOPE, 1986)

C3-group

Species

Immature crop

Mature crop

No. of records

% increase in biomass

No. of records

% increase in biomass

Fiber crop

Fruit crop

Grain crop

Leaf crop

Pulses

Root crops

C3 weeds

Trees

Cotton

Cucumber, eggplant, okra, pepper, tomato

Barley, rice, wheat, sunflower

Cabbage, white clover, fescue, lettuce, chard

Pea, bean, soybean

Sugar beet, radish

Jimson weed, pigweed, ragweed, sicklepod, other weeds

Cottonwood

5

15

6

5

18

10

10

14

124

40

20

37

43

49

34

26

2

12

15

9

13

Nil

Nil

Nil

104

21

36

19

17

?

?

?

Mean of all C3 plants

83

40+7

51

26+9*

* = 95% confidence limits.

Note: C3 plants have the highest rate of photosynthesis and can assimilate carbon dioxide better than lower plants.

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