In the Colorado Rocky Mountains, the association of high topography and low seismic
velocity in the underlying mantle suggests that recent changes in lithospheric buoyancy may have
been associated with surface uplift of the range. This paper examines the relationships among
late Cenozoic fluvial incision, channel steepness, and mantle velocity...
We give continued fraction algorithms for each conjugacy class of triangle Fuchsian group of signature
(3, n, ∞), with n ≥ 4. In particular, we give an explicit form of the group that is a subgroup of the Hilbert
modular group of its trace field and provide an interval map...
We compare two families of continued fractions algorithms, the symmetrized Rosen algorithm and the Veech algorithm. Each of these algorithms expands real numbers in terms of certain algebraic integers. We give explicit models of the natural extension of the maps associated with these algorithms; prove that these natural extensions are...
We give explicit pseudo-Anosov homeomorphisms with vanishing
Sah–Arnoux–Fathi invariant. Any translation surface whose Veech group
is commensurable to any of a large class of triangle groups is shown to have
an affine pseudo-Anosov homeomorphism of this type. We also apply a reduction
to finite triangle groups and thereby show the...
A fundamental debate exists regarding the geometry and depth extent of seismogenic faults in eastern Tibet. Along the Longmen Shan, geologic and seismic reflection data reveal a belt of low to moderate angle thrust faults, some of which may have been activated in devastating earthquakes in 2008 (Mw ~7.9, Wenchuan)...
Although variations in insolation and emergent feedbacks among soil moisture,
vegetation, and soil cohesion are commonly invoked to explain topographic asymmetry that
depends on aspect, few studies have directly quantified the efficiency of regolith transport along
hillslopes of opposing aspect. We utilize meteoric ¹⁰Be concentrations in regolith (n = 74)...
Ice core records show atmospheric methane mixing ratio and interpolar gradient varying with climate. Changes in wetland sources have been implicated as the basis for this observed variation in the record, but more recently, modeling studies suggest that changes in the CH₄ sink resulting from changes in sea surface temperature...
In this study, we use a time domain numerical model based on the fully nonlinear extended Boussinesq equations [Wei et al., 1995] to investigate surface wave transformation and breaking-induced nearshore circulation. The energy dissipation due to wave breaking is modeled by introducing an eddy viscosity term into the momentum equations,...
A new class of enclosed path gas analyzers suitable for eddy covariance applications combines the advantages
of traditional closed-path systems (small density corrections, good performance in poor weather)
and open-path systems (good spectral response, low power requirements), and permits estimates of
instantaneous gas mixing ratio. Here, the extent to which...