Not exact matches
Those sites gave her the chance to gather fossils from many different depths in the ancient ocean, from the more oxygen -
rich surface waters to deeper
zones.
Their simulations suggest that at least one planet in the one to two Earth - mass range could have formed within orbital distances of 0.5 to 1.5 AUs around both heavy - element -
rich stars; of particularly note, the simulations frequently generated a Earth - like planet in or near Star B's habitable
zone (where liquid water could exist on the planet's
surface).
Off California, the combined effects of sluggish circulation in semi-isolated basins, continental margin depths within the oxygen minimum
zone, and high
surface water productivity all contribute to accumulation of laminated, organic -
rich sediments in the Santa Barbara basin.
Climate change can influence the distribution of dead
zones by increasing water temperature and hence microbial activity, as well as reducing mixing of the ocean (i.e., increasing layering or stratification) of the Ocean — which have different temperatures, densities, salinities — and reducing mixing of oxygen -
rich surface layers into the deeper parts of the Ocean.
When the intensity of ultraviolet light from the sun increases, temperature rises in this ozone
rich air and weakens the downdraft, lowers the
surface pressure and with it the strength of the trade winds that blow across the ocean to the low pressure
zones that form over the warm waters that accumulate in the west.
The
zones form when nutrient -
rich waters from the depths rise to the
surface and enable a bloom in plankton growth.
Since phytoplankton form the base of marine food webs, the world's most productive fisheries are located in areas of coastal upwelling that bring cold nutrient
rich waters to the
surface (especially in the eastern boundary regions of the subtropical gyres); about half the world's total fish catch comes from upwelling
zones.