PEM West-B air mass classification. John Bradshaw , Georgia Institute of Technology Robert Talbot , University of New Hampshire Definition of terms: CN = Continental North CS = Continental South Date : July 17, 1995 _____________________________________________________________________ To : Pem-WB Science Team >From : John Bradshaw and Bob Talbot Re : Air Mass Classification Attached is the final listing of what we are designating air mass classification based on John Merrill's trajectory. This compilation has been adjusted for the latest set of extra trajectories that John released in early July. Thus it represents the final breakout we will be using in our air mass classification papers. These air masses were broken out following the same basic rules layed out in our Pem-WA analysis where an arc around the Pacific Rim is taken as "the continental boundary". This arc includes Japan, the Philippines, Indonesia, etc.. Please feel free to contact us if you have any questions regarding these break outs. Flt. Case Design. Start time Stop Time sec sec 5 CN<2 days 78600 1410 5 CS>2 days 1980 4800 5 CS<2 days 5430 7800 5 Marine 7680 13500 5 CN>2 days 13500 14580 6 CS<2 days 77250 81000 6 Marine 82800 85800 6 CS<2 days 85800 600 6 Marine 1800 4800 6 Marine 6690 8100 6 Marine 8970 10800 6 CS>2 days 11700 13140 6 CS>2 days 13380 16200 7 CS<2 days 85192 2700 7 CN<2 days 3540 4500 7 CN<2 days 5940 8130 7 CN<2 days 8430 11010 7 CS<2 days 12600 16170 7 CS<2 days 16200 18000 7 Marine 18900 20070 7 Marine 21000 22800 7 Marine 23280 24060 7 CN>2 days 20100 20670 8 CS<2 days 84210 2400 8 CN<2 days 5370 7800 8 CN<2 days 8190 10500 8 CN<2 days 13500 15000 8 CS>2 days 15000 18000 8 CN>2 days 18600 20400 8 CN>2 days 21090 22740 8 CS<2 days 24390 25800 9 Marine 12030 16890 9 Marine 18000 20850 9 CS<2 days 21870 24000 9 Marine 25080 29400 10 Marine 5100 15150 10 CS<2 days 15180 17070 10 CS<2 days 18360 20400 10 CN<2 days 21570 25650 10 CN<2 days 26370 28260 10 CN<2 days 29400 31800 11 CS<2 days 9300 15720 11 CS<2 days 16860 21000 11 CS<2 days 21000 25380 11 CS<2 days 26100 27900 11 CS<2 days 28800 33060 12 CN<2 days 7530 13800 12 CN<2 days 14400 15300 12 CN<2 days 17100 18000 12 CN<2 days 18570 22470 12 CN<2 days 30090 33600 12 CN<2 days 23430 24420 12 CN<2 days 24720 25680 12 CN<2 days 26640 28410 13 CS<2 days 8580 14100 13 CS<2 days 14760 16200 13 CN<2 days 21600 22200 13 CN<2 days 22800 24930 13 CN<2 days 25290 26100 13 CN<2 days 17940 19680 14 CN<2 days 16200 17100 14 CN>2 days 17400 18000 14 CN<2 days 21570 24210 14 CN<2 days 24690 28410 14 CN<2 days 28800 32880 14 CN<2 days 33630 34920 15 CN<2 days 4170 6930 15 CN<2 days 14880 17700 15 CN<2 days 18180 21000 15 CN<2 days 21740 23570 15 CN<2 days 86025 2730 15 CN<2 days 7260 10650 15 CN<2 days 12090 13290 16 CN<2 days 12600 14200 16 CN<2 days 15600 16800 16 CN<2 days 17280 18510 16 CN<2 days 20430 21300 16 CN<2 days 21900 22500 16 CN<2 days 23700 24690 16 CN<2 days 25170 26100 16 CN<2 days 27300 27960 16 CN<2 days 28470 29700 16 CN<2 days 5655 6300 16 CN<2 days 11310 11670 17 CN<2 days 2700 9000 Strat. Influence 17 CN<2 days 10440 13470 17 CN<2 days 14340 16500 17 CN<2 days 16770 17880 17 CN<2 days 18090 22890 17 CN<2 days 23430 24540 18 CN<2 days 2100 7500 18 CN<2 days 7800 9600 Strat. Influence 18 CN<2 days 10800 12900 18 CN<2 days 13800 15990 18 CN<2 days 17400 18000 Strat. Influence 18 CN<2 days 21000 23400 18 CN<2 days 23730 25230 18 CN<2 days 19530 19800 19 CN<2 days 64800 66000 Strat. Influence 19 Marine 68400 70200 19 Marine 72000 74400 19 CN>2 days 79200 80100 19 CN>2 days 81000 81450