Proposed 10-year change in ozone amount (1990 to 2000) shown as a ratio of year 2000 to year 1990 amount (i.e. 10 percent increase in bottom layer) Mid-latitude Summer Mid-latitude Winter Pres (mb) O3 2000/1990 Pres (mb) O3 2000/1990 1001.1000 1.100008e+00 1005.0000 1.100037e+00 977.3300 1.099830e+00 979.0900 1.099843e+00 953.5600 1.099652e+00 953.2200 1.099649e+00 929.7800 1.099473e+00 927.4000 1.099455e+00 906.0300 1.099295e+00 901.6800 1.099263e+00 882.2300 1.099117e+00 875.9500 1.099070e+00 858.4600 1.098938e+00 850.3200 1.098877e+00 834.6800 1.098760e+00 824.7500 1.098686e+00 810.9600 1.098582e+00 799.3000 1.098495e+00 787.1300 1.098403e+00 774.1600 1.098306e+00 763.3500 1.098225e+00 749.3300 1.098120e+00 739.5800 1.098047e+00 724.5600 1.097934e+00 715.8200 1.097869e+00 699.8400 1.097749e+00 692.0300 1.097690e+00 674.9600 1.097562e+00 668.2500 1.097512e+00 650.0800 1.097376e+00 644.4700 1.097334e+00 625.2600 1.097189e+00 620.7400 1.097156e+00 600.5400 1.097004e+00 596.9200 1.096892e+00 575.7700 1.096515e+00 573.1500 1.096060e+00 551.1100 1.096022e+00 549.4400 1.095230e+00 526.6300 1.095533e+00 525.6000 1.094396e+00 502.1500 1.095043e+00 501.8200 1.093564e+00 477.8300 1.094557e+00 478.0900 1.092733e+00 453.7600 1.094075e+00 454.2700 1.091899e+00 429.8600 1.093597e+00 430.5200 1.091068e+00 406.1100 1.093122e+00 406.7200 1.090235e+00 382.1600 1.092108e+00 382.9500 1.086590e+00 358.2800 1.090914e+00 359.1600 1.081832e+00 334.4300 1.089721e+00 335.3900 1.077078e+00 310.6600 1.088533e+00 311.6100 1.072322e+00 287.0200 1.086442e+00 287.8700 1.058679e+00 263.5900 1.083631e+00 264.0500 1.036447e+00 240.3500 1.079684e+00 240.3800 1.014355e+00 217.5500 1.074212e+00 216.5500 9.887334e-01 195.2800 1.068112e+00 192.7600 9.570133e-01 173.5300 1.059412e+00 169.0400 9.381734e-01 152.1300 1.050852e+00 145.2900 9.345290e-01 131.0900 1.031090e+00 121.3900 9.321390e-01 110.0300 1.010030e+00 97.6910 9.305773e-01 88.5570 9.744949e-01 73.8890 9.365277e-01 66.8400 9.675260e-01 53.1150 9.468850e-01 47.7700 9.665610e-01 37.9010 9.701650e-01 33.7400 9.791990e-01 26.9880 9.883533e-01 23.7510 9.906864e-01 19.2370 1.001526e+00 16.6110 1.000000e+00 13.6970 1.004717e+00 11.5510 9.992517e-01 9.7894 1.001316e+00 8.0127 9.910508e-01 6.9648 9.918592e-01 5.5634 9.815734e-01 4.9686 9.862649e-01 3.8787 9.754099e-01 3.5420 9.827853e-01 2.7051 9.711162e-01 2.5247 9.803041e-01 1.8920 9.769273e-01 1.8009 9.854463e-01 1.3246 9.846646e-01 1.2830 9.901417e-01 0.9342 9.895729e-01 0.9151 9.932075e-01 0.6569 9.930381e-01 0.6522 9.953983e-01 0.4625 9.954689e-01 0.4652 9.969566e-01 0.3263 9.971707e-01 0.3313 9.980725e-01 0.2303 9.983709e-01 0.2362 9.988650e-01 0.1630 9.992124e-01 0.1683 9.994308e-01 0.1155 9.998062e-01 0.1200 9.998333e-01 0.0825 1.000219e+00 0.0503 1.000414e+00 0.0348 1.000815e+00