Earth science encompasses geological, hydrological, atmospheric and meteorological research that paves the way towards better understanding of the planet on which we live. From deep in the Earth’s interior to the highest reaches of the atmosphere, the work highlighted here shows significant research ...
Geoid anomalies from intermediate-wavelength density contrasts are amplified by up to an order of magnitude. Geoid anomalies are primarily the result of density contrasts in the interior of convecting layers; density contrasts near layer boundaries are almost completely compensated. Layered mantle ...
There is more to the Earth than what we can see on the surface. In fact, if you were able to hold the Earth in your hand and slice it in half, you'd see that it has multiple layers. But of course, the interior of our world continues to hold some mysteries for us. Even as we...
(5 miles) per second. It increases to about 11 km (6.8 miles) per second near the centre of the Earth. The speed increase with depth results from increased hydrostatic pressure as well as from changes in rock composition; in general, the increase causesPwaves to travel in curved paths ...
Earth is made up of several layers: the lithosphere, asthenosphere, lower mantle (also known as mesospheric mantle), outer core and inner core.
Measurements from a robotic underwater vehicle reveal the impacts of meltwater from the giant iceberg A-68A on the properties of the surrounding Southern Ocean. In addition to increasing surface stratification and mid-depth vertical mixing, the meltwater impacts primary productivity, with direct and ...
It is not necessary to consider all the causes which may have disturbed the position of the rock layers, but the most important of them deserves attention. It has already been found that, although the exterior of the earth is cool, the interior is hot. Now it is known that almost all ...
Summary The observed variation of the seismic velocities with depth, below the crust, is examinedwith reference to the variation to be expected in a homogeneous medium. A general equation is derived for the variation of the quantity, $$/phi = V_P2 – 4/3 V_S2 $$ , in a homogeneous gr...
Seismological studies have previously detected abundant scatterers in the lower mantle, potentially linked to long-term slab subduction, and petrology studies suggest carbonates can be sequestrated within the oceanic crust and transported into the lower
Earth’s spin axis slowly moves relative to the crust over time. A 120-year-long record of this polar motion from astronomical and more modern geodetic measurements displays interannual and multidecadal fluctuations of 20 to 40 milliarcseconds superimpos