Nasa found a way to track ocean currents from space. what they saw is troubling – the washington post electricity definition physics


Some scientists have already suggested gas oil that the odd cold “blob” pattern on the map above, featuring record cold North Atlantic temperatures on an otherwise quite hot planet, may be attributable to this development. The gigantic circulation, technically termed the Atlantic Meridional Overturning Circulation or AMOC, carries warm water northward even as it also ag gaston birmingham sends cold salty water back south at depth. Thus, changes here can reverberate around the globe — one recent study even found that a full AMOC shutdown could trigger a temporary period of global cooling.

Now, in a new paper in Geophysical Research Letters, researchers from NASA’s Jet Propulsion Laboratory and the University of Texas at Austin use a new and sophisticated tool — the “Gravity Recovery and Climate Experiment” satellites, or GRACE electricity and circuits class 6 cbse — to confirm some pretty odd behavior in the circulation in 2009 and 2010 that has also been linked to a sudden and extreme 4-inch sea-level rise on the East Coast.

The new satellite technique, the researchers say, holds great promise to determine if — as feared — the circulation is indeed slowing down. “A lot of the evidence that has been amassed is indirect, and electricity definition what we’re trying to do is provide a way to really observe the AMOC across all latitudes,” says Felix Landerer, a researcher with NASA’s Jet Propulsion Laboratory who is lead author of the study.

To understand how gasoline p the researchers achieved this, it’s first important to describe — and profusely praise — the GRACE satellites that made it all possible. These satellites are not only a fascinating tool but, frankly, a testament to the stunning power of science — and they’re already responsible for a huge number of new electricity and magnetism study guide 5th grade insights into the workings of our planet.

The GRACE satellites are a pair of twin observing devices that orbit the Earth 137 miles from electricity generation by source by country one another. The Earth’s gravitational pull on the satellites varies depending upon the mass of what is below them at a particular time — a mountain, an ocean — and so by measuring slight perturbations in the distance between the two satellites, scientists detect these mass changes.

But when does the Earth’s mass change in a significant way, one that would suggest an important anomaly? Mostly, this does not happen with the ground, rocks, mountains — at least not on human time scales. But water gas kush at the Earth’s surface moves around a great deal — California’s drought has been picked up by GRACE, as has dramatic melting of the glaciers of Alaska.

The new research now shows that the same can be done with changes in the oceans. Specifically, the researchers electricity quiz for grade 5 used GRACE to detect what they call ocean “bottom pressure anomalies” between 3,000 and 5,000 meters deep in the Western part of the North Atlantic in 2009 and 2010. The anomalies were so big that the researchers estimate that they translate into a decline gas national average of 5.5 sverdrups of ocean flow — and a sverdrup is a gigantic number. It refers to a water flow of one million cubic meters of water per second.

What GRACE picks up on, specifically, is regions where the ocean contains more or less mass because more water is collected in that area, due to the actions of waves, winds or currents. “If you imagine putting a bathroom scale electricity examples under that water it would weigh more,” says Watkins. “So that’s really what GRACE measures. As ocean gas x ultra strength during pregnancy circulation piles up water somewhere, we see it, and the AMOC has a particular geographic distribution of that piling up of water, and that’s the thing that we’re grabbing.”

Some of the key measurements were taken for the latitude line at 26.5 degrees North, which cuts across Florida, but the GRACE technique is not limited to any particular line of latitude. It just so happens that 26.5 North is also where ocean based measurements have detected changes in the circulation e85 gas stations in san antonio tx in the last decade or so — and the new satellite observations are in general agreement with those findings. Which means that if the ortega y gasset revolt of the masses ocean keeps changing in the way that it has apparently been changing so far, we’ll going to have a new and impressive way of monitoring it that doesn’t simply rely on major ship voyages.