Sentences with phrase «mean ocean oxygen»
The worst - case result is that mean ocean oxygen concentration falls to a low of about 68 % of pre-industrial levels in the next few millennia, while low - oxygen «dead zones» — which don't support fish or many other marine animals such as crabs and clams — spread nearly six-fold to cover 12.8 % of the sea surface area.
http://blogs.nature.com/ Not exact matches
But this doesn't mean that oceans needed animals in order to get oxygen.
This means that (1) animals are directly involved in an oxygen - regulating cycle or feedback loop that has previously been overlooked, and (2) we can directly test the idea (despite the uncertainties associated with looking so far back in time) by looking for a decrease in ocean oxygenation in conjunction with the spread of bioturbation.
Less photosynthesis, in turn, meant less oxygen released into the ocean.
It also appears that there are decreasing rates of bottom water formation; that means that oxygen input to the deep ocean is probably decreasing... is it possible that we could be pushing the global oceans towards a state where bottom water anoxia is much more prevalent?
That means building the global scientific network to monitor changes in the ocean's vital signs: pH, temperature and dissolved oxygen.
This means that the warmer the oceans are near the location of the glaciers or ice sheets, the more heavy oxygen there is in the ice core.
Low - oxygen bottom waters mean that the microbial population of the deep ocean is limited in its ability to oxidise photsynthetically produced organic matter back to CO2; thus the sediments accumulate a higher proportion of organic matter.
Add the facts in trend: The oceans are acidifying, The climate has already shifted 4 degrees of latitude in the past 30 years; the Arctic will likely be virtually ice free during the summer melt within the decade, all the uncertainty ranges are positive and none of them are negative, CO2 is plant food, but what does that mean when the oxygen levels are dropping, the Hoover dam is supposed to shut down in 2023 due to no water (latitudinal shift), the Yangtze in China is getting very low, etc. etc..