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ESTIMATED ATMOSPHERIC C0 2 LEVELS AND SEA LEVEL RISE 

 USING THE TWO BASIC ANALYTICAL APPROACHES 



(High-Growth Scenario, High-Temperature Sensitivity, 



No Trace Gases) 



Fixed-Retention Factor Coupled ORML-GISS Modeling 



(0.53A)* Initial Final GISS 



ORNL Results Iteration Results 



Sea Sea 



C0 2 Level C0 2 Level 



C0 2 Level Sea Level Level Rise Level Rise 



( ppm) Rise (cm) (ppm) ( cm) ( ppm) ( cm) 



1980 339 339 339 



1990 354 0.99 359 1.06 356 1.02 



2000 370 2.22 382 2.47 375 2.32 



2010 392 3.72 412 4.27 401 3.95 



2020 420 5.58 451 6.57 436 6.03 



2030 457 7.88 502 9.45 482 8.66 



2040 511 10.80 578 13.15 555 12.09 



2050 584 14.52 681 17.86 654 16.56 



2060 676 19.13 814 23.71 784 22.19 



2070 787 24.68 979 30.77 947 29.05 



2080 919 31.19 1181 39.04 1147 37.16 



2090 1083 38.71 1439 48.63 1403 46.62 



2100 1281 47.31 1756 59.59 1720 57.48 



* A is a conversion factor to convert tons of carbon retained in 

 the atmosphere into ppm of C0 2 . A = 0.472 Gigatons of Carbon 

 per ppm of C0 2 . 



