ocean stratification climate change

By • 一月 17th, 2021

Therefore, the observed ocean stratification increase is another irrefutable piece of evidence of human-driven global warming. Those multi-year warm-cold fluctuations affect temperatures around the world, with global hot spikes during strong El Niños and cool-downs during La Niña. If the current slows, more hot water could build up along the East Coast of the United States, leading to more coastal heat waves and rising sea levels. With increased stratification, heat from climate warming cannot penetrate into the deep ocean as readily, which helps to raise the surface temperature. ICN provides award-winning climate coverage free of charge and advertising. It also reduces the capability of ocean carbon storage, exacerbating the global warming. Ms. Zheng Lin Upper Ocean Water Masses Shrinking in Changing Climate: Less Efficient CO2 Sink Apr. buoyancy changes—could have dramatic climate feedbacks as the ocean absorbs less heat and CO2from the atmosphere. An oceanic feature called upper ocean stratification causes upper ocean layers to warm faster than deeper ones. Our no-nonsense daily digest of the day’s must-read headlines from around the web, curated by our expert staff. “Evidence is mounting that this circulation system is already slowing down, as has been predicted by climate models,” he said. With increased stratification, heat from climate warming cannot penetrate into the … This stable stratified configuration acts as a barrier to water mixing that impacts the efficiency of vertical exchanges of heat, carbon, oxygen and other constituents. And if less warm water is transported northward, the climate in northwestern Europe would become more volatile. Source: NOAA MESA Project. This indicates a significant change in tropical thermocline depth that is important to the El Nino phenomenon. Credit: Bob Berwyn. Other processes important in influencing global sea level include changes to groundwater storage including dams and reservoirs. is a service of the American Association for the Advancement of Science. This has major consequences for life in the ocean by reducing nutrients and oxygen, and it greatly affects climate. The interaction between climate and oceans is altering, and the exchange is intensifying. “This is why hurricanes are bigger and longer-lasting and more intense than before.”. The intensified layering, called ocean stratification, is happening faster than scientists expected, an international team of researchers reported in the study, published Sept. 28 in the journal Nature Climate Change. The areas characterized by the largest stratification changes include the Arctic, the tropics, the North Atlantic, and the northeast Pacific. As the climate responds to decades of increasing carbon emissions, the store of energy and heat from the atmosphere builds up in the ocean. Pulitzer Prize-winning, nonpartisan reporting on the biggest crisis facing our planet. by contributing institutions or for the use of any information through the EurekAlert system. Climate change is warming ocean waters and causing shifts in the distribution and abundance of seaweeds, corals, fish and other marine species. Disclaimer: AAAS and EurekAlert! The Earth’s climate and oceans are changing because of activities that emit greenhouse gases into the atmosphere. A new study, by a group of international researchers from China and U.S., published in Nature Climate Change found that the global ocean has become more layered and resistant to vertical mixing as warming from the surface creates increasing stratification. Near the surface of the ocean, global warming is creating increasingly distinct layers of warm water that stifle seawater circulations critical for regulating climate and sustaining marine life. A warming ocean has huge implications for climate change, some of which we’ve already discussed.Another of these implications is ocean stratification, or the increased layering of our oceans due to differences in temperature. Nature Climate Change. We deliver climate news to your inbox like nobody else. Stratification intensifies under warming. If the ocean surface warms faster and less carbon is carried to the depths, those processes along with other climate feedbacks could lead atmospheric CO2 to triple and the global average temperature could increase 8 degrees Fahrenheit by 2100, he added. Can have profound effects on zooplankton, fish and mammals, ” said. Daily email of our original stories and top headlines from around the.... American Association for the upper 600 feet of the ocean absorbs less heat and CO2from the atmosphere.! Continuing to use this site, you accept this policy that, us! Bad for marine life are already spreading in the oceans. ” prevents the vertical of... 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