Estimates of C need to include the contribution of abyssal hill topography on scales O(10) km not resolved by current topography products.
For small-scale waves generated over subcritical abyssal hill topography, overturning of the upward-propagating waves (Muller and Buhler 2009) predicts a bottom-intensified dissipation, with a steeper than exponential decay with height and a local dissipation fraction as large as 60%.
2]) estimated using (top) the topography resolved in the Shuttle Radar Topography Mission (SRTM) global bathymetry and elevation data at 30 arc s resolution with data voids filled (SRTM30_PLUS) bathymetry database and (bottom) a statistical representation of unresolved abyssal hill topography estimates (Melet et al.
Melet, 2015: A threedimensional map of tidal dissipation over abyssal hills.
Remarkably delicate abyssal hill
Geophysicist John Crowley, now at Engineering Seismology Group Canada in Kingston, and colleagues noticed that the abyssal hills
that line the ocean floor between Australia and Antarctica appear to have been laid down during these sea level lows.
Caption: Abyssal hills
, which run parallel to the mid-ocean rift (yellow, center) in this seafloor map, formed when lower sea levels led to large magma outpourings at mid-ocean ridges.
For the first time, the orientation and the length of these abyssal hills
could be accurately measured.
in terms of sheer surface area, they can't compare to deep-sea ridges called abyssal hills, which cover 60 to 70 percent of Earth's face.
Some theories about abyssal hills suggest that they develop through eruptions along the midocean ridges.
This two-step process explains how abyssal hills form in the Pacific and other spots where the plates spread apart at their quickest rate, according to the scientists.