Table 21— RADIOISOTOPES IN SURFACE WATER* Year Lat Long Total Date depth, miles Isothermal depth, miles sr% Shelf Area 1956 41°31’N 40°18’N 40° WN 6/4 2/9 2/10 5 110 275 79 35 12.7 + 3.4 15.0 + 3.0 30.0 + 1.6 OW W 2/10 2/11 2000 2750 120 150 10.3 + 1.6 6.3 + 1.6 40°19°N 71°29°W 2/14 78 60 12.8 + 2,0 39°18’N 39°19'N 39°26’N 71°40°W 72°02’ W 72°10 W 2/15 2/15 2/16 1630 1550 784 200 200 175 8.6 + 2.0 6.7+ 4.7 10,2 + 2.0 39°39'N 73°07 W 2/16 39 30 8.6 + 2.0 39°46’N 73°57) W 2/16 24 L5 18.8 + 3.0 500 75 125 10.0 + 1.5 9.1+ 1.8 6600 5340 6300 5700 50 60 40 100 10.3+1.7 10,0 + 2.5 8.141.5 12.0 + 2.0 39°42'N 39°10‘'N 1957 70°40 W 71°) W 71° OW 71° “71° Southerly Samples 1956 1957 21°34’ N 38°17 N 86°12) W 69°02) W 5/18 6/4 17°49°N 20°15'N 22°00'N 24°50'N 60°07’ W 60°05’ W 60°09 W 61°55’ W 12/9 12/10 12/11 12/12 27°47'N 63°41'W 12/13 5120 260 12.2+1.5 21°08’N 8°18’S 33°20’ W 7°42.5'W 2/13 3/7 5100 4582 150 20 4.7+ 1.0 5.0 + 1,0 8°18'S 31°17 W 3/20 5300 125 8°16'N 17°19 W 5/8 4600 39 4.5+1.0 8°17'N 49°15’ W 5/18 4400 80 5.4 + 1.0 *Radioactivity, dis/min/100 liters. o4