Matthew W. Schmidt

Learn More
Variations in the strength of the North Atlantic Ocean thermohaline circulation have been linked to rapid climate changes during the last glacial cycle through oscillations in North Atlantic Deep Water formation and northward oceanic heat flux. The strength of the thermohaline circulation depends on the supply of warm, salty water to the North Atlantic,(More)
Geochemical and sedimentological evidence suggest that the rapid climate warming oscillations of the last ice age, the Dansgaard-Oeschger cycles, were coupled to fluctuations in North Atlantic meridional overturning circulation through its regulation of poleward heat flux. The balance between cold meltwater from the north and warm, salty subtropical gyre(More)
[1] We present new experimentally determined trace element partition coefficients for nine garnet/melt and two clinopyroxene/melt pairs at 2.9–3.1 GPa and 1325 –1390 C, applicable to anhydrous partial melting of MORB-like eclogite in the upper mantle. Phase compositions are similar to those documented in partial melting experiments of eclogite at these(More)
The muscle component of the force applied to a bicycle pedal (foot force) by seated humans provided insight into the organization of the motor system. Healthy adults (n=11) pedaled a stationary cycle ergometer while attempting to match peak foot force magnitude to visually presented force targets (200, 250, ..., 650 N). Pedaling cadence was maintained at 60(More)
This Article is brought to you for free and open access by the Ocean, Earth & Atmospheric Sciences at ODU Digital Commons. It has been accepted for inclusion in OEAS Faculty Publications by an authorized administrator of ODU Digital Commons. For more information, please contact Repository Citation Schmidt, Matthew W. and(More)
not buffered externally. However, f°2 calculations based on biotite-sanidine-magnetite-H20-02 equilibrium [D. R. Wones, Kozan Chishitsu 31, 191 (1981)] yield f°2 values 1.5 to 2 log units above the nickel-nickel oxide buffer. This is consistent with the estimated f[2 conditions of natural epidote-bearing magmas (6, 16). Quenched experimental charges were(More)
[1] The waters passing through the Florida Straits today reflect both the western portion of the wind‐driven subtropical gyre and the northward flow of the upper waters which cross the equator, compensating North Atlantic Deep Water export as part of the large‐scale Atlantic meridional overturning circulation. It has been postulated from various lines of(More)
The abilities of a kinematic model and a muscle model of the human lower limb to predict the stereotyped direction of the muscular component of foot force produced by seated subjects in a static task were tested and compared. Human subjects (n=11) performed a quasi-static, lower-limb pushing task against an instrumented bicycle pedal, free to rotate about(More)
Both instrumental data analyses and coupled ocean-atmosphere models indicate that Atlantic meridional overturning circulation (AMOC) variability is tightly linked to abrupt tropical North Atlantic (TNA) climate change through both atmospheric and oceanic processes. Although a slowdown of AMOC results in an atmospheric-induced surface cooling in the entire(More)
Heinrich events—surges of icebergs into the North Atlantic Ocean—punctuated the last glacial period. The events are associated with millennial-scale cooling in the Northern Hemisphere. Fresh water from the melting icebergs is thought to have interrupted the Atlantic meridional overturning circulation, thus minimizing heat transport into the northern North(More)