Warm water is mixing deep into the water column. “There’s definitely indications of warming in the upper 500 to 1,000 meters of the ocean,” Sweet said. That somewhere is up, and then out into flood zones. As it takes up more space, it has to go somewhere. “Right now we’re starting to get some high accumulations,” Sweet said.Ī second reason for the burgeoning seas in the region is that water changes size - the volume of hot water is larger than cool water, Sweet said. They also move in a westerly direction, meaning they pile water up on the eastern seaboard of the U.S. “There can be one- to two-decade oscillation to these trends,” said Sweet, and the NOAA website says they can take decades to cross a given ocean. Rossby waves are massive 600-mile-wide undulations in the ocean that are so large and slow that they’re invisible to the human eye. The Tulane study suggests that Rossby waves are partially to blame for the current spike. But they also found that there are some natural reasons why this water might be accumulating.” “There are two reasons: It’s human-induced, it’s the climate signal at play. Sweet said there’s a large volume of water right now in the Gulf and Southeastern United States. The Astoria, Oregon graph shows little change. Both the Pensacola and Virginia Key graphs show a steady increase, with a spike occurring around 2010.
These graphs indicate sea level rise over time, starting in the early 1900 through 2021. Data from the studies showed sea levels are 8 inches higher now than they were in 2006 at Lake Pontchartrain. Those rates are “unprecedented in at least 120 years,” the report said. Data revealed that while global mean sea-level rise has been about 1.5 millimeters per year since 1900, and more than 3 millimeters per year since 1992, in parts of the eastern Gulf, it’s been a rapid 10 mm per year since 2010. The second study, published in Nature by scientists from Tulane, Old Dominion and the University of Central Florida, looked at tide gauge records along the U.S. The paper warns that the trend coincides with record-breaking North Atlantic hurricane seasons in recent years, resulting in elevated storm surge and more intense coastal flooding during storm events. The rate of acceleration exceeds the long-term trend, says a recent paper by Jianjun Yin, of the University of Arizona, and seems to have begun around 2010. The data shows a rapid rise in areas such as Pensacola, Cedar Key and Lake Pontchartrain in New Orleans, as well as accelerated rises on the east coast, from Miami up to Cape Hatteras. in the last decade, according to two new studies. Sites are listed from North to South.Sea levels have risen faster in the Gulf of Mexico and the Southeast coast than other parts of the U.S. Predictions for other locations and dates can be found at the West Coast sites.
NOAA Predictions by the Center for Operational Oceanographic Products and Services They are based on predictions by the National Oceanic and Atmospheric Administration. The following are Tide Tables for the OSU Hatfield Marine Science Center Dock in Yaquina Bay, Oregon.
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