Science, Том 292John Michels (Journalist) American Association for the Advancement of Science, 2001 |
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Стр. 283
... present amounts by 2020 and 2.7 times present values by 2050 ( Table 1 ) . By 2050 , N fertilization alone would annually add 236 × 106 MT of N to terrestrial ecosystems ( 20 ) , compared with 140 × 106 MT from all natural sources ( 2 ) ...
... present amounts by 2020 and 2.7 times present values by 2050 ( Table 1 ) . By 2050 , N fertilization alone would annually add 236 × 106 MT of N to terrestrial ecosystems ( 20 ) , compared with 140 × 106 MT from all natural sources ( 2 ) ...
Стр. 505
... present . Respirators are then introduced into the system at low frequency . In this simulation , respirators eventually outcompete fermenters . Pa- rameters : cell diffusion DN = 20 , re- source influx R 15. See ( 4 , 27 ) for further ...
... present . Respirators are then introduced into the system at low frequency . In this simulation , respirators eventually outcompete fermenters . Pa- rameters : cell diffusion DN = 20 , re- source influx R 15. See ( 4 , 27 ) for further ...
Стр. 662
... present knowledge of changes in temperatures and two major circulation fea- tures - El Niño - Southern Oscillation ( ENSO ) and the North Atlantic Os- cillation ( NAO ) —over much of the last 1000 years , mainly on the basis of high ...
... present knowledge of changes in temperatures and two major circulation fea- tures - El Niño - Southern Oscillation ( ENSO ) and the North Atlantic Os- cillation ( NAO ) —over much of the last 1000 years , mainly on the basis of high ...
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