منابع مشابه
Deep Radar Sounding of Martian Polar Deposits: Radiative Transfer Models
Introduction: Investigation of the internal structure of martian polar caps, being a challenging task during past decades [1], is now going to be solved with the ground penetrating radar (GPR) instruments, both orbital and landed. In the present report the propagation of ultra wide band (UWB) chirp pulse in martian polar ice caps is investigated. The specific nature of the problem is that rathe...
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A residual sphere is formed by projecting seismic ray travel-time anomalies, relative to a reference Earth model, onto an imaginary sphere around an earthquake. Any dominant slab-like fast band can be determined with spherical harmonic expansion. The technique is useful in detecting trends associated with high-velocity slabs beneath deep earthquakes after deep-mantle and near-receiver effects a...
متن کاملDeep-reaching thermocline mixing in the equatorial pacific cold tongue
Vertical mixing is an important factor in determining the temperature, sharpness and depth of the equatorial Pacific thermocline, which are critical to the development of El Ninõ and Southern Oscillation (ENSO). Yet, properties, dynamical causes and large-scale impacts of vertical mixing in the thermocline are much less understood than that nearer the surface. Here, based on Argo float and the ...
متن کاملHabitat-forming deep-sea corals in the Northeast Pacific Ocean
We define habitat-forming deep-sea corals as those families of octocorals, hexacorals, and stylasterids with species that live deeper than 200 m, with a majority of species exhibiting complex branching morphology and a sufficient size to provide substrata or refugia to associated species. We present 2,649 records (name, geoposition, depth, and data quality) from eleven institutions on eight hab...
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The Asia Pacific region was characterized in the second half of the twentieth century by an absence of regional trading arrangements. The situations changed after 2000, raising questions of sequencing and of the boundaries of the region. This paper argues that the proliferation of regional and bilateral agreements has been driven by the rapid emergence of regional value chains and centres on tr...
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ژورنال
عنوان ژورنال: Nature
سال: 1895
ISSN: 0028-0836,1476-4687
DOI: 10.1038/052550a0