3 Works

Tidal dispersion in short estuaries

Adrian Mikhail P. Garcia & W. Rockwell Geyer
The salinity distribution of an estuary depends on the balance between the river outflow, which is seaward, and a dispersive salt flux, which is landward. The dispersive salt flux at a fixed cross-section can be divided into shear dispersion, which is caused by spatial correlations of the cross-sectionally varying velocity and salinity, and the tidal oscillatory salt flux, which results from the tidal correlation between the cross-section averaged, tidally varying components of velocity and salinity....

Causes of oceanic crustal thickness oscillations along a 74-Myr Mid-Atlantic Ridge flow line

William Shinevar, Hannah Mark, Fiona Clerc, Emmanuel A. Codillo, Jianhua Gong, Jean-Arthur Olive, Stephanie Brown, Paris T. Smalls, Yang Liao, Véronique Le Roux & Mark Behn
Gravity, magnetic, and bathymetry data collected along a continuous 1400-km-long spreading-parallel flow line across the Mid-Atlantic Ridge indicate significant tectonic and magmatic fluctuations in the formation of oceanic crust over a range of timescales. The transect spans from 28 Ma on the African Plate to 74 Ma on the North American plate, crossing the Mid-Atlantic Ridge at 35.8 ºN. Gravity-derived crustal thicknesses vary from 3–9 km with a standard deviation of 1 km. Spectral analysis...

Increased typhoon activity in the Pacific deep tropics driven by Little Ice Age circulation changes

James Bramante, Murray Ford, Paul Kench, Andrew D. Ashton, Michael Toomey, Richard M. Sullivan, Kristopher B. Karnauskas, Caroline C. Ummenhofer & Jeffrey P. Donnelly
The instrumental record reveals that tropical cyclone activity is sensitive to oceanic and atmospheric variability on inter-annual and decadal scales. However, our understanding of climate’s influence on tropical cyclone behavior is restricted by the short historical record and sparse prehistorical reconstructions, particularly in the western North Pacific where coastal communities suffer loss of life and livelihood from typhoons annually. Here we reconstruct three millennia of deep tropical North Pacific cyclogenesis and compare with other records...

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