
© REUTERS/Yuriko NakaoA wild dolphin swims in the ocean near Mikura island, 200km south of Tokyo, August 3, 2008 file photo.
Lower levels of oxygen in the Earth's oceans, particularly off the United States' Pacific Northwest coast, could be another sign of fundamental changes linked to global climate change, scientists say.
They warn that the oceans' complex undersea ecosystems and fragile food chains could be disrupted.
In some spots off Washington state and Oregon , the almost complete absence of oxygen has left piles of Dungeness crab carcasses littering the ocean floor, killed off 25-year-old sea stars, crippled colonies of sea anemones and produced mats of potentially noxious bacteria that thrive in such conditions.
Areas of hypoxia, or low oxygen, have long existed in the deep ocean. These areas - in the Pacific, Atlantic and Indian oceans - appear to be spreading, however, covering more square miles, creeping toward the surface and in some places, such as the Pacific Northwest , encroaching on the continental shelf within sight of the coastline.
"The depletion of oxygen levels in all three oceans is striking," said Gregory Johnson, an oceanographer with the National Oceanic and Atmospheric Administration in Seattle.
Comment: What a load of nonsense: "Barth and others say the changes are consistent with current climate-change models. Previous studies have found that the oceans are becoming more acidic as they absorb more carbon dioxide and other greenhouse gases."
The oceans are warming due to undersea volcanism. This is heating the LOWER atmosphere, while the UPPER atmosphere is cooling rapidly due to space dust and other possible factors. When the moisture in the lower atmosphere hits the colder upper atmosphere, you get torrential rains, hail, snow. All of this is precursor to the rapid onset of the next Ice Age.
There is no Global Warming, though there is certainly coming Global Climate change.