IPCC Scenario A1B Greenhouse Gas Mixing Ratios ---------------------------------------------------- CO2 N2O CH4 CFC-11 CFC-12 MPTGs+OTGs Year ppm ppm ppm ppb ppb ppb --------------------------------------------------- 2000 369.0 .3160 1.760 .267 .535 .367 2001 371.1 .3168 1.771 .265 .534 .379 2002 373.3 .3176 1.782 .263 .533 .391 2003 375.5 .3184 1.793 .261 .533 .404 2004 377.6 .3192 1.804 .258 .532 .417 2005 379.8 .3200 1.815 .256 .531 .431 2006 382.0 .3208 1.826 .254 .530 .444 2007 384.3 .3216 1.837 .252 .529 .459 2008 386.5 .3224 1.848 .250 .529 .474 2009 388.7 .3232 1.860 .248 .528 .489 2010 391.0 .3240 1.871 .246 .527 .505 2011 393.8 .3247 1.886 .243 .523 .509 2012 396.6 .3254 1.901 .239 .519 .512 2013 399.5 .3261 1.916 .236 .514 .516 2014 402.4 .3268 1.932 .233 .510 .519 2015 405.2 .3275 1.947 .229 .506 .523 2016 408.2 .3282 1.963 .226 .502 .527 2017 411.1 .3289 1.978 .223 .498 .531 2018 414.0 .3296 1.994 .220 .494 .534 2019 417.0 .3303 2.010 .217 .490 .538 2020 420.0 .3310 2.026 .214 .486 .542 2021 423.3 .3317 2.043 .210 .481 .544 2022 426.6 .3324 2.060 .207 .477 .545 2023 429.9 .3331 2.077 .203 .472 .547 2024 433.3 .3338 2.095 .200 .467 .548 2025 436.7 .3345 2.112 .196 .463 .550 2026 440.1 .3352 2.130 .193 .458 .552 2027 443.5 .3359 2.148 .190 .454 .553 2028 447.0 .3366 2.166 .186 .450 .555 2029 450.5 .3373 2.184 .183 .445 .556 2030 454.0 .3380 2.202 .180 .441 .558 2031 457.6 .3386 2.215 .177 .437 .566 2032 461.2 .3392 2.228 .173 .432 .575 2033 464.8 .3398 2.242 .170 .428 .584 2034 468.5 .3404 2.255 .167 .424 .593 2035 472.1 .3410 2.268 .164 .420 .602 2036 475.9 .3416 2.282 .161 .416 .611 2037 479.6 .3422 2.296 .158 .412 .620 2038 483.4 .3428 2.309 .155 .408 .630 2039 487.2 .3434 2.323 .152 .404 .639 2040 491.0 .3440 2.337 .149 .400 .649 2041 495.0 .3446 2.343 .146 .396 .661 2042 498.9 .3452 2.349 .143 .392 .674 2043 503.0 .3458 2.356 .141 .388 .687 2044 507.0 .3464 2.362 .138 .384 .700 2045 511.1 .3470 2.368 .135 .381 .713 2046 515.2 .3476 2.375 .133 .377 .726 2047 519.4 .3482 2.381 .130 .373 .740 2048 523.5 .3488 2.387 .128 .369 .754 2049 527.8 .3494 2.394 .125 .366 .768 2050 532.0 .3500 2.400 .123 .362 .783 2051 535.9 .3506 2.399 .121 .358 .797 2052 539.8 .3512 2.397 .118 .355 .810 2053 543.7 .3518 2.396 .116 .351 .824 2054 547.7 .3524 2.394 .114 .348 .839 2055 551.6 .3530 2.393 .111 .345 .853 2056 555.7 .3536 2.392 .109 .341 .868 2057 559.7 .3542 2.390 .107 .338 .883 2058 563.8 .3548 2.389 .105 .335 .899 2059 567.9 .3554 2.387 .103 .331 .914 2060 572.0 .3560 2.386 .101 .328 .930 2061 575.8 .3564 2.377 .099 .325 .942 2062 579.6 .3568 2.369 .097 .322 .954 2063 583.4 .3572 2.360 .095 .319 .967 2064 587.3 .3576 2.352 .093 .316 .979 2065 591.2 .3580 2.343 .092 .313 .992 2066 595.1 .3584 2.335 .090 .310 1.005 2067 599.0 .3588 2.326 .088 .307 1.018 2068 603.0 .3592 2.318 .086 .304 1.031 2069 607.0 .3596 2.309 .085 .301 1.044 2070 611.0 .3600 2.301 .083 .298 1.058 2071 614.7 .3605 2.290 .081 .295 1.065 2072 618.4 .3610 2.279 .080 .292 1.073 2073 622.2 .3615 2.267 .078 .289 1.080 2074 625.9 .3620 2.256 .077 .286 1.087 2075 629.7 .3625 2.245 .075 .284 1.095 2076 633.5 .3630 2.234 .074 .281 1.102 2077 637.4 .3635 2.223 .072 .278 1.110 2078 641.2 .3640 2.213 .071 .275 1.118 2079 645.1 .3645 2.202 .069 .273 1.125 2080 649.0 .3650 2.191 .068 .270 1.133 2081 652.5 .3653 2.179 .067 .267 1.138 2082 656.0 .3656 2.168 .065 .265 1.143 2083 659.6 .3659 2.156 .064 .262 1.147 2084 663.2 .3662 2.145 .063 .260 1.152 2085 666.8 .3665 2.134 .062 .257 1.157 2086 670.4 .3668 2.122 .061 .255 1.162 2087 674.0 .3671 2.111 .059 .252 1.167 2088 677.6 .3674 2.100 .058 .250 1.172 2089 681.3 .3677 2.089 .057 .247 1.177 2090 685.0 .3680 2.078 .056 .245 1.182 2091 688.1 .3684 2.067 .055 .243 1.184 2092 691.3 .3688 2.057 .054 .240 1.186 2093 694.4 .3692 2.046 .052 .238 1.189 2094 697.6 .3696 2.036 .051 .236 1.191 2095 700.8 .3700 2.025 .050 .233 1.193 2096 704.0 .3704 2.015 .049 .231 1.195 2097 707.2 .3708 2.005 .048 .229 1.197 2098 710.5 .3712 1.994 .047 .226 1.200 2099 713.7 .3716 1.984 .046 .224 1.202 2100 717.0 .3720 1.974 .045 .222 1.204 -------------------------------------------------