oceans

oceans /channels/taxonomy/term/10019/all en The global ocean out of balance /channels/channels/news/global-ocean-out-balance-334733 Surprising as it sounds, all life forms in the ocean, from small krill to large tuna, seem to obey a simple mathematical law that links an organism’s abundance to its body size. For example, although small krill are individually only about one millionth of the weight of a large tuna, they also tend to be a million times more numerous throughout the oceans. The idea, known as the Sheldon size spectrum theory, was first advanced in the 1970s, but has never been tested for a wide range of marine species and on a global scale until now. Wed, 10 Nov 2021 21:14:13 +0000 webfull 174633 at /channels Alterations to seabed raise fears for future /channels/channels/news/alterations-seabed-raise-fears-future-291163 The ocean floor as we know it is dissolving rapidly as a result of human activity. Mon, 29 Oct 2018 19:01:00 +0000 webfull 142609 at /channels The making of Antarctica /channels/news/making-antarctica-265483 One of the big mysteries in the scientific world is how the ice sheets of Antarctica formed so rapidly about 34 million years ago, at the boundary between the Eocene and Oligocene epochs. There are 2 competing theories: The first explanation is based on global climate change: Scientists have shown that atmospheric carbon dioxide levels declined steadily since the beginning of the Cenozoic Era, 66 million years ago. Once CO2 dropped below a critical threshold, cooler global temperatures allowed the ice sheets of Antarctica to form. Tue, 31 Jan 2017 18:20:08 +0000 webfull 124550 at /channels Study of oceans’ past raises worries about their future /channels/news/study-oceans%E2%80%99-past-raises-worries-about-their-future-228777 The ocean the Titanic sailed through just over 100 years ago was very different from the one we swim in today. Global warming is increasing ocean temperatures and harming marine food webs. Nitrogen run-off from fertilizers is causing coastal dead zones. A ƻ��Ժ-led international research team has now completed the first global study of changes that occurred in a crucial component of ocean chemistry, the nitrogen cycle, at the end of the last ice age. The results of their study confirm that oceans are good at balancing the nitrogen cycle on a global scale. But the data also shows that it is a slow process that may take many centuries, or even millennia, raising worries about the effects of the scale and speed of current changes in the ocean. Thu, 13 Jun 2013 19:11:51 +0000 webfull 97035 at /channels Microplastic pollution discovered in St. Lawrence River /channels/news/microplastic-pollution-discovered-st-lawrence-river-239101 A team of researchers from ƻ��Ժ and the Quebec government have discovered microplastics (in the form of polyethylene 'microbeads,' less than 2 mm in diameter) widely distributed across the bottom of the St. Lawrence River, the first time such pollutants have been found in freshwater sediments. Tue, 23 Sep 2014 16:23:10 +0000 webfull 105460 at /channels les océans brûlés - les années lumières /channels/news/les-oceans-brules-les-annees-lumieres-239678 Wed, 22 Oct 2014 18:58:37 +0000 webfull 106054 at /channels