A Robust Surface Matching Technique for Integrated Monitoring of Coastal Geohazards     

Pauline Miller  Jon Mills  Stuart Edwards  Paul Bryan  Stuart Marsh  Peter Hobbs 《Marine Geodesy》2013,36(1-2):109-123

At the dynamic coastal fringe, numerous processes interact with local morphology. In soft-cliff environments, this can often lead to the occurrence of coastal geohazards. These can pose a major threat to property and cultural heritage, and an effective monitoring strategy is therefore essential. While contemporary monitoring techniques have been applied, these are often unsuitable in isolation. This paper presents an integrated approach, with the development of weighted surface matching software enabling reliable dataset fusion and multi-temporal change detection, even where significant surface differences exist. Evaluation of this approach is presented and discussed.  相似文献   

The Madden–Julian oscillation wind-convection coupling and the role of moisture processes in the MM5 model     

Erwan Monier  Bryan C. Weare  William I. Gustafson Jr. 《Climate Dynamics》2010,35(2-3):435-447

The Madden–Julian oscillation (MJO) produced by a mesoscale model is investigated using standardized statistical diagnostics. Results show that upper- and lower-level zonal winds display the correct MJO structure, phase speed (8 m s^?1) and space–time power spectrum. However, the simulated free atmosphere moisture, outgoing longwave radiation and precipitation do not exhibit any clear MJO signal. Yet, the boundary layer moisture, moist static energy and atmospheric instability, measured using a moist static energy instability index, have clear MJO signals. A significant finding is the ability of the model to simulate a realistic MJO phase speed in the winds without reproducing the MJO wind-convection coupling or a realistic propagation in the free atmosphere water vapor. This study suggests that the convergence of boundary layer moisture and the discharge and recharge of the moist static energy and atmospheric instability may be responsible for controlling the speed of propagation of the MJO circulation.  相似文献   

Relic H ii regions and radiative feedback at high redshifts     

Andrei Mesinger †  Greg L. Bryan  Zoltán Haiman 《Monthly notices of the Royal Astronomical Society》2009,399(3):1650-1662

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On the spreading of power plant cooling water in a tidal river applied to the river Elbe     

Ingrid Bork  Ernst Maier-Reimer 《Advances in water resources》1978,1(3):161-168

By means of a simple one-dimensional model some basic features of the spreading of cooling water are discussed. Based on the idea of equilibrium temperature, a numerical technique for the simulation of diffusion and cooling processes is presented. The technique is applied to a two-dimensional time-dependent model of the tide in the lower river Elbe. The measurements at the outlet of an existing nuclear power plant (Stade) are reproduced quantitatively.  相似文献   

MINERALOGY AND CHEMISTRY OF THE ASHMORE CHONDRITE     

W. B. Bryan  G. Kullerud 《Meteoritics & planetary science》1975,10(1):41-50

The Ashmore olivine-bronzite chondrite is a group H, type 5 stone which differs from other H5 chondrites mainly in its higher proportion of chromite (0.9 wt %) and in the relatively lower iron and higher magnesium content of the chromite. The modal proportions of opaque phases were obtained by point-counting in reflected light, and the modal proportions of nonopaque silicate phases in the matrix were estimated from traverses of a selected small area by electron microprobe. The consistency between the bulk chemical analysis and the chemical composition calculated from the modal mineral proportions implies that the bulk silicate composition of the chondrules is very similar to that of the silicate matrix and suggests a common source for both chondrules and matrix.  相似文献   

Der Nachweis der Standsicherheit von Hohlraumbauten     

Ernst Kurzmann 《Rock Mechanics and Rock Engineering》1979,12(2):137-162

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Geochemical subdivision and correlation of clay-rich beds in Turonian sediments of northern Germany     

David S. Wray  Christopher J. Wood  Gundolf Ernst  Ulrich Kaplan 《地学学报》1996,8(6):603-610

Thin, clay-rich beds form a key component of the lithostratigraphic scheme established for Middle and Upper Turonian sediments in northern Germany. Previously, using limited petrographic evidence, clay-rich beds across much of this region have been classified as either containing altered volcanic ash (bentonites) or detrital clays. This paper demonstrates that the use of rare-earth element (REE) data enables a rapid and reliable subdivision of clay-rich beds into those composed of bentonitic clays and those composed of detrital clays. Application of this method to the Lower Saxony region of northern Germany demonstrates that four bentonites (T_C T_di, T_e and T_f) and a number of detrital beds can be reliably identified and correlated. Three beds previously proposed to be bentonites are reinterpreted as being composed of detrital clays (T_o, T_D2 and T_G) and a revision of the stratigraphic nomenclature is proposed. Analysis of clay-rich beds from the Munster Basin demonstrates that it is possible to correlate individual bentonites and detrital beds between Lower Saxony and the Miinster Basin, and between shallow and deep water facies.  相似文献   

General joint conditional simulations using a fast fourier transform method     

Allan Gutjahr  Bryan Bullard  Sean Hatch 《Mathematical Geology》1997,29(3):361-389

A procedure for generating joint statistically homogeneous random fields is examined. The method is based on the spectral representation theorem. It handles large fields easily and is both rapid and flexible. Algorithm development and examples are presented. The procedure is adapted further to include the possibility of generating fields that are jointly conditioned on data from two related fields.  相似文献   

Spatial characteristics of surface and atmospheric properties during HartX     

S. Ernst  M. Wüthrich 《Theoretical and Applied Climatology》1996,53(1-3):59-67

Summary Remote sensing and ground measurements were used to evaluate the homogeneity of the Scots pine plantation of Hartheim and the interactions between the forest and its surroundings during HartX.Remote sensing data contribute to characterization of the Scots pine plantation of Hartheim in terms of surface properties and thermal and biological characteristics of the forest. The surroundings of the main experiment site in the forest has homogenous normalized difference vegetation index, microwave specle and brightness temperatures to all directions for at least 500 m. Local sensible heat flux estimates using satellite measured brightness temperatures andin situ measured wind and air temperatures showed good agreement.On some days during HartX the test area was influenced by advection of dry air from the northern Upper Rhine Valley. Agricultural surroundings close to the forest are influenced by breezes flowing out of the forest during radiative nights with weak large-scale motion.With 7 Figures  相似文献   

Comment on “the Canary Islands: an example of structural control on the growth of large oceanic-island volcanoes” by J.C. Carracedo     

J. Martí  G. J. Ablay  S. Bryan 《Journal of Volcanology and Geothermal Research》1996,72(1-2)

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