US coastlines will face increasing flooding in the mid-2030s thanks to a regular lunar cycle that will magnify rising sea levels caused by climate change, according to research led by NASA scientists.
A key factor identified by the scientists is a regular “wobble” in the moon’s orbit – first identified in the 18th century – that takes 18.6 years to complete. The moon’s gravitational pull helps drive Earth’s tides.
In half of this lunar cycle, Earth’s regular daily tides are diminished, with high tides lower than usual and low tides higher than usual. In the cycle’s other half, the situation is reversed, with high tides higher and low tides lower.
The expected flooding will result from the combination of the continuing sea level rise associated with climate change and the arrival of an amplification part of the lunar cycle in the mid-2030s, the researchers said.
“In the background, we have long-term sea level rise associated with global warming. It’s causing sea level to increase everywhere,” Ben Hamlington, NASA team leader and one of the study’s authors, told Reuters.
“This effect from the moon causes the tides to vary, so what we found is that this effect lines up with the underlying sea level rise, and that will cause flooding specifically in that time period from 2030 to 2040,” Hamlington said.
The researchers studied 89 tide gauge locations in every coastal US state and territory aside from Alaska. The effect of the dynamic applies to the entire planet except for far northern coastlines like in Alaska.
The prediction pushes previous estimates for serious coastal flooding forward by about 70 years.
The study, published this month in the journal Nature Climate Change, was led by members of a NASA science team that tracks sea level change. The study focused on US coasts but the findings are applicable to coasts worldwide, NASA said.
“This is eye-opening for a lot of people,” Hamlington said. “It’s really critical information for planners. And I think there’s a great amount of interest in trying to get this information from science and scientists into the hands of planners.”
Hamlington said city planners should plan accordingly.
“A building or particular piece of infrastructure, you may want to be there for a very long amount of time, whereas something else you may just want to protect or have access to for a few years.”
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
Boeing Starliner Orbital Flight Test 2: Live updates – Space.com
The CST-100 Starliner capsule has passed its flight readiness review (FRR) for the upcoming liftoff, which will kick off the uncrewed Orbital Flight Test 2 (OFT-2) mission to the station, NASA and Boeing representatives announced today (July 22). Read the full story here.
Over the weekend, engineers mated the Starliner spacecraft to its Atlas V rocket, marking a key milestone ahead of the mission’s launch next week. See the photos here.
NASA hands SpaceX contract for first mission to Jupiter's moon Europa – Fox Business
NASA’s (National Aeronautics and Space Administration) Southern California-based Jet Propulsion Laboratory (JPL) has awarded SpaceX (Space Exploration Technologies Corp.) with the launch services contract for the Earth’s first mission to conduct detailed investigations of Europa.
The “Europa Clipper” mission is set for October 2024 and NASA said in a Friday release that the spacecraft will launch on a Falcon Heavy rocket from NASA’s Kennedy Space Center in Florida.
The contract award is approximately $178 million dollars.
The world – discovered first by famed astronomer Galileo Galilei – shows strong evidence for an ocean of salty water beneath the planet’s crust, thought to contain twice as much water as Earth’s oceans combined.
NASA believes that the moon’s ice shell is around 10 to 15 miles thick and its internal ocean is estimated to be around 40 to 100 miles deep.
The mission will send Europa Clipper to orbit around Jupiter to perform close flybys of Europa on an elliptical path. The orbiter’s suite of science instruments will help to measure the ocean’s depth and salinity and the thickness of its icy shell, map surface geology and composition, search for plumes of water vapor that could be emitted from Europa’s crust and subsurface lakes and produce high-resolution images of its surface.
JPL notes that understanding Europa habitability will help astrobiologists to better understand how life developed on Earth approximately 382 million miles away, in addition to efforts to find life beyond the blue marble.
While JPL leads the development of the Europa Clipper mission in partnership with the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, for NASA’s Science Mission Directorate in Washington, NASA’s Kennedy-based Launch Services Program will manage the Europa Clipper launch service.
Additionally, the Planetary Missions Program Office at NASA’s Marshall Space Flight Center in Huntsville, Alabama, will orchestrate program management of the Europa Clipper mission.
Buck Moon rises over Oshawa harbour – insauga.com
July’s orange- or yellow-tinted full moon – known as a Buck Moon – arrived at 10:36 p.m. Friday night.
It’s called the Buck Moon because the antlers of male deer are in full-growth mode at this time.
Indigenous people of Canada have several other names for the phenomenon, including Berry Moon (Anishinabe), Feather Moulting Moon (Cree), Salmon Moon, (Tlingit) and Raspberry Moon (Algonquin, Ojibwe).
The full moon can be viewed in all its glory until tomorrow night.
Photo: Colin Ryan
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