Oxygen running low for deep sea animals

[Cetacea]

Increasing carbon dioxide and decreasing oxygen in the oceans

will make it harder for deep-sea animals to "breathe"

New calculations made by marine chemists from the Monterey Bay Aquarium Research Institute (MBARI) suggest that low-oxygen "dead zones" in the ocean could expand significantly over the next century.These predictions are based on the fact that, as more and more carbon dioxide dissolves from the atmosphere into the ocean, marine animals will need more oxygen to survive.

Concentrations of carbon dioxide are increasing rapidly in the Earth's atmosphere, primarily because of human activities.

Read more...

[doesnt_matter]

As if those animals didn't have it hard enough as it is!

[Insaniac]

Man, again, is the problem. ****ing parasite's we human being's have become. On a religous view, I wonder if the truth is that God created the Eart and the animal's to live in peace, and Satan created us human's to ****ing wreck the place?

Make's sense. ^ ^

[stevewinn]

hang on. these findings come from "New calculations" its all guess work and suggestions. We want is hard evidence. jesus.

"Concentrations of carbon dioxide are increasing rapidly in the Earth's atmosphere, primarily because of human activities".

and this line is the biggest steaming pile of bull **** i've read on here for a good while. its this type of reporting that does the green movement no good at all.

People need to find out how much C02 is produced by Humans and then add all the Natural sources. Volcano's for instance. just look at the amount of C02 released into the atmosphere when Mount Pinatubo went bang or Krakatoa. it would take two decades of Human C02 to reach the levels they released in one day. i remember this from the BBC's program Horizons

good night Vienna

Edited April 21, 2009 by stevewinn

[Wickian]

So increasing the amount of Carbon Dioxide in the air 0.004% (the current amount of carbon dioxide in the air is about 0.036% or so) somehow severely dwindles the amount of oxygen the deep sea has? How the hell can they determine that "dead zones" in the ocean could expand significantly over the next century when we've just barely started scratching the surface of how the deep sea even works?

I guess there's another article for this guy to add the list of "global warming caused disasters"

[Mattshark]

So increasing the amount of Carbon Dioxide in the air 0.004% (the current amount of carbon dioxide in the air is about 0.036% or so) somehow severely dwindles the amount of oxygen the deep sea has? How the hell can they determine that "dead zones" in the ocean could expand significantly over the next century when we've just barely started scratching the surface of how the deep sea even works?

I guess there's another article for this guy to add the list of "global warming caused disasters"

Well clearly they know more about it and about equilibriums than you wickian .

But you have never been one to let evidence get in your way.

Oh and how is going 280ppm to 380pmm 0.4% exactly? I let you figure that bit of maths out.

Edited April 21, 2009 by Mattshark

[Mattshark]

hang on. these findings come from "New calculations" its all guess work and suggestions. We want is hard evidence. jesus.

"Concentrations of carbon dioxide are increasing rapidly in the Earth's atmosphere, primarily because of human activities".

and this line is the biggest steaming pile of bull **** i've read on here for a good while. its this type of reporting that does the green movement no good at all.

People need to find out how much C02 is produced by Humans and then add all the Natural sources. Volcano's for instance. just look at the amount of C02 released into the atmosphere when Mount Pinatubo went bang or Krakatoa. it would take two decades of Human C02 to reach the levels they released in one day. i remember this from the BBC's program Horizons

good night Vienna

Calculations are not guess work Steve.

Sorry Steve, but it is true, we are constantly exponentially increasing our output of CO2, volcanoes are sporadic and part of the natural carbon cycle. What we are doing is not.

It is the shift we are causing that causing is the problem and there is clear evidence of this problem.

And I have previously posted hard evidence mate

Edit: Humans CO2 yearly is higher than volcanoes

Volcanos: 27 billion tonnes per year

Humans: 32 billion tonnes per year

Edited April 21, 2009 by Mattshark

[Cetacea]

hang on. these findings come from "New calculations" its all guess work and suggestions. We want is hard evidence. jesus.

So without further exploration and calculations how do you expect to get hard evidence?

Ignoring the large body of supporting scientific work. Science is always careful about it's wording you will be hard pressed to find a paper that states; this is the way it is full stop.

People need to find out how much C02 is produced by Humans and then add all the Natural sources. Volcano's for instance. just look at the amount of C02 released into the atmosphere when Mount Pinatubo went bang or Krakatoa. it would take two decades of Human C02 to reach the levels they released in one day. i remember this from the BBC's program Horizons

Do you think they're not?!

Not scientific as such but well explained, though I might be biased due to presence of all time favourite David Attenborough:

If a little documentary like this does it, do you seriously think scientific papers do not?!

How the hell can they determine that "dead zones" in the ocean could expand significantly over the next century

By using calculations and evidence like such:

An example of respiration stress at a station in the eastern tropical Pacific (WOCE P16C Sta 413: 13°01.75′N, 91°45.60′W). (A) The calculated pCO2 rises with increasing atmospheric CO2 concentration. The preindustrial profile was calculated from the modern data by removing the anthropogenic CO2 at constant alkalinity. The projections (two times preindustrial and three times preindustrial) were calculated by determining the stepwise change in total CO2 in the sea surface for each case and then propagating this change throughout the ocean. ( Calculation of the respiration index with depth (RI) reveals the existence of a formal dead zone for aerobic life, where RI ≤ 0 (gray band). However, even at RI = 0.0 to 0.4 (red band), aerobic respiration is not observed. Bacteria appear to set the practical limit for all aerobic respiration at RI = 0.4 to 0.7 (orange band). Some marine animals can tolerate RI = 1 or slightly less, but others cannot (yellow band). With increasing atmospheric CO2 concentrations, dead zones for aerobic life will grow in size. Rising ocean temperatures will further exacerbate the growth of the dead zones by decreasing oxygen saturation.

What is of concern is the impact of rising oceanic CO2 concentrations on this ratio. Present-day pCO2 at 500 m depth at this site is about 1000 µatm, but an increase of +280 parts per million by volume CO2 to the atmosphere and surface ocean translates into a far greater change at depth. As surface sea water is transferred to depth, its buffer capacity is reduced by the acidic components of the normal Redfield cycle (6). A doubling of surface-water pCO2 leads to a doubling or more of pCO2 at depth (see the figure) due to the different geochemistry of the deeper water masses. From ocean equilibration with a doubled CO2 atmosphere, the pCO2 at the example station at 500 m depth will rise to 2500 µatm and possibly higher. Such levels have not been considered previously in many of the models designed to predict the status of the future ocean.

[Lt_Ripley]

could the melt of glaciers ( fresh water ) into the oceans and the resulting desalinization and change of current play a part in that ?

could it also just be pollution ? as with what's happening in the Gulf of Mexico ? a dead zone .

Edited April 22, 2009 by Lt_Ripley