The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 90
... permafrost 300 metres thick Brooks Range active layer 0.5-3.0 metres thick 75 metres thick Alaska Range Chugach Range Pacific Ocean active layer 0.5-3.0 ... permafrost layer will become thicker each winter. 90 Permafrost Arctic Ocean ...
... permafrost 300 metres thick Brooks Range active layer 0.5-3.0 metres thick 75 metres thick Alaska Range Chugach Range Pacific Ocean active layer 0.5-3.0 ... permafrost layer will become thicker each winter. 90 Permafrost Arctic Ocean ...
Page 91
... permafrost layer reaches an equilibrium depth at which the amount of geothermal heat reaching the permafrost is on the average equal to that lost to the atmosphere . Thousands of years are re- quired to attain a state of equilibrium ...
... permafrost layer reaches an equilibrium depth at which the amount of geothermal heat reaching the permafrost is on the average equal to that lost to the atmosphere . Thousands of years are re- quired to attain a state of equilibrium ...
Page 92
... permafrost unfrozen sediment floodplain 咖 road river sea level of permafrost . If the net effect of timely snowfalls is to prevent heat from leaving the ground in the cold winter , permafrost becomes warmer . Actually , local ...
... permafrost unfrozen sediment floodplain 咖 road river sea level of permafrost . If the net effect of timely snowfalls is to prevent heat from leaving the ground in the cold winter , permafrost becomes warmer . Actually , local ...
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activity America animals appear areas atoms became become body called camera century changes characteristics chemical Church colour common complete compounds consists containing continued drugs early effect electrons elements energy example existence experience Family field Figure fins fishes groups human important increase individual industry Italy known later lens less light liquid living lower major material means ment methods move movement natural North object occur organic original Peking Pentecostal percent period permafrost personality pest Peter petroleum Philip philosophy photographs plants political position possible practice present printing problems production Quakers range region result rocks similar social South species structure surface temperature theory tion United usually widely