Results 21 to 30 of about 69,955 (264)

Mantle melting as a function of water content beneath back-arc basins [PDF]

open access: yes, 2006
Subduction zone magmas are characterized by high concentrations of H_(2)O, presumably derived from the subducted plate and ultimately responsible for melting at this tectonic setting.
Grove, Timothy L.   +5 more
core   +1 more source

A Global Plate Model Including Lithospheric Deformation Along Major Rifts and Orogens Since the Triassic [PDF]

open access: yes, 2019
Global deep‐time plate motion models have traditionally followed a classical rigid plate approach, even though plate deformation is known to be significant.
Bower, Dan J.   +9 more
core   +1 more source

Surface and lightning sources of nitrogen oxides over the United States: Magnitudes, chemical evolution, and outflow [PDF]

open access: yes, 2007
We use observations from two aircraft during the ICARTT campaign over the eastern United States and North Atlantic during summer 2004, interpreted with a global 3-D model of tropospheric chemistry (GEOS-Chem) to test current understanding of regional ...
Avery, M A   +22 more
core   +2 more sources

The Thin Raiment of the North Atlantic Triangle: Canada and the Decision for War, 1938-9

open access: yesThe London Journal of Canadian Studies
The concept of a North Atlantic triangle was perhaps never as appealing as during the decades surrounding the Second World War when John Bartlet Brebner formulated the idea in a book with that title, published in 1945.
Terry Crowley
doaj   +2 more sources

JIGSAW-GEO (1.0): locally orthogonal staggered unstructured grid generation for general circulation modelling on the sphere [PDF]

open access: yes, 2017
An algorithm for the generation of non-uniform, locally-orthogonal staggered unstructured spheroidal grids is described. This technique is designed to generate very high-quality staggered Voronoi/Delaunay meshes appropriate for general circulation ...
Engwirda, Darren
core   +2 more sources

Effects of mixing on evolution of hydrocarbon ratios in the troposphere [PDF]

open access: yes, 2007
Nonmethane hydrocarbon (NMHC) concentration ratios provide useful indicators of tropospheric oxidation and transport processes. However, the influences of both photochemical and mixing processes are inextricably linked in the evolution of these ratios ...
Atlas, EL   +7 more
core   +1 more source

Dental crown morphological variation and heterodonty in carcharhiniform sharks

open access: yesThe Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

Marine Spatial Planning: Case Studies [PDF]

open access: yes, 2016
With marine planning developing in many parts of the world, especially the E.U., U.S. and Australia, it is important for industry to be part of the creation of a shared vision for a marine area and the necessary elements (e.g., outreach, funding ...

core  

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

open access: yesThe Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro   +1 more
wiley   +1 more source

Lagged responses in the composition of small mammal communities to a century of climate change

open access: yesEcography, EarlyView.
Climate change has widespread effects on the distribution, abundance and behavior of species around the world, leading to the reshuffling of ecological communities. However, it remains unclear whether individual species' range shifts scale up to result in communities whose rate of change lag, lead, or track the rate of climate change. We capitalized on
Ethan Abercrombie   +3 more
wiley   +1 more source

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