LIST OF ILLUSTRATIONS xv 



PIGUBB PAGE 



62. Average northern limits of pack ice around the Antarctic Con- 



tinent 218 



63. Annual variation of air- and sea-surface temperatures at Yoko- 



hama and San Francisco 225 



64. Total amount of energy given off in summer from the North 



Pacific and North Atlantic Oceans 229 



65. Total amount of energy given off in winter from the North 



Pacific and North Atlantic Oceans 229 



66. Net annual surplus of radiation penetrating the water surface. 229 



67. Total annual surplus of energy received by the ocean water when 



the exchange of energy with the atmosphere is considered . . 230 



68. Energy exchange between the sea surface and the atmosphere in 



lat. 35° to 40°N in the Pacific and Atlantic Oceans 231 



69. Energy exchange between the sea surface and the atmosphere in 



the Western and Eastern North Pacific Ocean 232 



70. Energy exchange between the sea surface and the atmosphere in 



the Western and Eastern North Atlantic Ocean 233 



The following charts follow p. 235: 



Chart 1. Surface temperatures of the oceans in February. 



Chart 2. Surface temperatures of the oceans in August. 



Chart 3. Surface salinity of the oceans in northern summer. 



Chart 4. Surface currents of the oceans in February-March. 



