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Interaction and Variability of Ice Streams under a Triple-Valued Sliding Law and Non-Newtonian Rheology
(Wiley-Blackwell, 2011)
Ice streams are regions of fast flowing glacier ice that transport a significant portion of the total ice flux from present ice sheets. The flow pattern of ice streams can vary both temporally and spatially. In particular, ...
Biologically Induced Initiation of Neoproterozoic Snowball-Earth Events
(Proceedings of the National Academy of Sciences, 2011)
The glaciations of the Neoproterozoic Era (1,000 to 542 MyBP) were preceded by dramatically light C isotopic excursions preserved in preglacial deposits. Standard explanations of these excursions involve remineralization ...
Excitation of Intraseasonal Variability in the Equatorial Atmosphere by Yanai Wave Groups via WISHE-Induced Convection
(American Meteorological Society, 2011)
A mechanism is presented, based on multiscale interactions via nonlinear wind-induced surface heat exchange (WISHE), that produces eastward-propagating, intraseasonal convective anomalies in the tropical atmosphere. ...
An Atmospheric Teleconnection Linking ENSO and Southwestern European Precipitation
(American Meteorological Society, 2011)
Numerous studies have demonstrated statistical associations between the El Niño–Southern Oscillation (ENSO) and precipitation in the Mediterranean basin. The dynamical bases for these teleconnections have yet to be fully ...
Optimal Excitation of Interannual Atlantic Meridional Overturning Circulation Variability
(American Meteorological Society, 2011)
The optimal excitation of Atlantic meridional overturning circulation (MOC) anomalies is investigated in an ocean general circulation model with an idealized configuration. The optimal three-dimensional spatial structure ...
Possible early foraminiferans in post-Sturtian (716-635 Ma) cap carbonates
(Geological Society of America, 2011)
Foraminifera are an ecologically important group of modern heterotrophic amoeboid eukaryotes whose naked and testate ancestors are thought to have evolved ∼1 Ga ago. However, the single-chambered agglutinated tests of these ...
Partitioning of Localized and Diffuse Deformation in the Tibetan Plateau from Joint Inversions of Geologic and Geodetic Observations
(Elsevier BV, 2011)
The spatial complexity of continental deformation in the greater Tibetan Plateau region can be defined as the extent to which relative motion of the Indian and Asian plates is partitioned between localized slip on major ...
Improved estimate of the policy-relevant background ozone in the United States using the GEOS-Chem global model with 1/2° × 2/3° horizontal resolution over North America
(Elsevier BV, 2011)
The policy-relevant background (PRB) ozone is defined by the US Environmental Protection Agency (EPA) as the surface ozone concentration that would be present over the US in the absence of North American anthropogenic ...
Opportunity Mars Rover mission: Overview and selected results from Purgatory ripple to traverses to Endeavour crater
(Wiley-Blackwell, 2011)
[1] Opportunity has been traversing the Meridiani plains since 25 January 2004 (sol 1), acquiring numerous observations of the atmosphere, soils, and rocks. This paper provides an overview of key discoveries between sols ...
Skeletons and Ocean Chemistry: The Long View
(Oxford University Press, 2011)