Part of HuffPost News. From each one they extracted the ocean’s kinetic energy month by month, at a coarse scale that would ignore the turbulence of eddies and storms. There's a lot going on at NOAA's National Ocean Service. “The results highlight the need for policy interventions to limit the future flow of plastics into natural environments and minimise impacts on ocean ecosystems.”. You may hesitate at first because you are essentially falling into a deep, dark, narrow hole, but soon you realize that you can't afford to panic and the only option left is to enjoy the ride. The best way to go down the Devil's Throat is to plunge in head first. Hello Guest ! Using underwater robots, scientists have found that larvae use swimming motions to affect their course and reach suitable places to … AAAS is a partner of HINARI, AGORA, OARE, CHORUS, CLOCKSS, CrossRef and COUNTER. Yet when it comes to the question of whether the droughts in Australia, California and the Mediterranean are due to the expansion of the tropics, Gerrit Lohmann can't give a definitive answer. What led the experts to explore this avenue: data on ocean gyres that they happened to come across five years ago—data on ocean temperatures and satellite-based data, freely available on databases. The severe droughts in the USA and Australia are the first sign that the tropics, and their warm temperatures, are apparently expanding in the wake of climate change. This site uses cookies to assist with navigation, analyse your use of our services, and provide content from third parties. The Kuroshio Current, running up Eastern Asia, has seemed stable, whereas the Agulhas, flowing along Africa’s eastern coast, has broadened, fracturing into meandering eddies. Based on observations combined with models, the authors claim that from 1990 to 2013, the energy of the currents increased by some 15% per decade. ), Harmful Algal Blooms: Regional Information, Hurricane Dorian Damage Assessment Imagery, NOAA Responds to Ongoing Outbreak of Coral Disease in Florida, Assessing Barry's Damage to Coastal Communities from the Air, NOAA report: Growth in U.S. Receive mail from us on behalf of our trusted partners or sponsors? Scientists: Revolutionary Device Can Harness Ocean Currents To Power The World A revolutionary device that can harness energy from slow-moving rivers and ocean currents … Ocean currents in the deep sea are creating microplastic hotspots which house around 1.9 million tiny pieces of debris per square metre, scientists have said. (Image: © NASA/Goddard Space Flight Center Scientific Visualization Studio). Oceanography news. Temperatures could plummet while sea levels spike. According to his calculations, this phenomenon is the catalyst for the tropics expanding to the north and south. "However, we can safely assume that the ocean currents and expansion of the tropics make droughts and hurricanes more likely to occur.". Even deep-sea animals have synthetic fibres in their guts. Researchers attribute this to the fact that the tropics, the warm region surrounding the Equator, appear to be expanding. In the U.S., where over half of us live along the coast and more than 78 percent of our overseas trade by volume comes and goes along our marine highways, the health of our coasts is intricately connected to the health of our nation's economy. Wake up to the day's most important news. They don’t track velocity through the water column. New evidence suggests ocean currents are moving faster now than they did two decades ago. NY 10036. Differences in water density, resulting from the variability of water temperature (thermo) and salinity (haline), also cause ocean currents. A major ocean current in the Arctic is faster and more turbulent as a result of rapid sea ice melt, a new study from NASA shows. Instead, Hu’s team turned to so-called reanalyses, which combine observations of the ocean and atmosphere with computer models to fill in the gaps and produce a global picture. Your email address is used only to let the recipient know who sent the email. The simplified drawing shows how changes in polar vortex winds high in the stratosphere can influence the North Atlantic, Ever dipped a toe in salt water? Sign in to manage your newsletter preferences. Researchers believe slow-moving currents concentrate 1.9 million pieces of microplastic per square metre under the oceans. A warming climate appears to be altering global currents, reconstructed here from satellite and ship readings. Ocean currents move heat around the globe, which can in turn affect ocean habitats, local weather and local temperatures. Because carbon dioxide (CO2) is less soluble in warm water, that could slow the ocean’s uptake of CO2 from the atmosphere. PLUS a free mini-magazine for you to download and keep. The data set, compiled by oceanographer Alison Gray of the University of Washington, Seattle, covers only 6 years, from 2005 to 2010, but Hu found that it reveals an even clearer global speedup than the reanalysis models. What does biodegradable plastic degrade into? But to get a picture of how ocean, The oil that has been gushing out of a broken well in the Gulf of Mexico for more than a month will likely reach the Atlantic, A revolutionary device that can harness energy from slow-moving rivers and ocean currents could provide enough power for.
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