PyWiFeS: a rapid data reduction pipeline for the Wide Field Spectrograph (WiFeS)     

Michael J. Childress  Frédéric P. A. Vogt  Jon Nielsen  Robert G. Sharp 《Astrophysics and Space Science》2014,349(2):617-636

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Historical seismicity of the Strait of Dover-Pas de Calais     

C.P. Melville  A. Levret  P. Alexandre  J. Lambert  J. Vogt 《地学学报》1996,8(6):626-647

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Near-IR Integral Field Spectroscopy of High-z Galaxies     

Andrew Bunker  Annette Ferguson  Rachel Johnson  Richard McMahon  Ian Parry  Max Pettini  Alfonso Aragón-Salamanca  Rachel Somerville  Nicole Vogt 《Astrophysics and Space Science》2002,281(1-2):529-529

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Flow network derivation from a high resolution DEM in a low relief,agrarian landscape   总被引：1，自引：0，他引：1  

Wolfgang Schwanghart  Geoff Groom  Nikolaus J. Kuhn  Goswin Heckrath 《地球表面变化过程与地形》2013,38(13):1576-1586

Digital flow networks derived from digital elevation models (DEMs) sensitively react to errors due to measurement, data processing and data representation. Since high‐resolution DEMs are increasingly used in geomorphological and hydrological research, automated and semi‐automated procedures to reduce the impact of such errors on flow networks are required. One such technique is stream‐carving, a hydrological conditioning technique to ensure drainage connectivity in DEMs towards the DEM edges. Here we test and modify a state‐of‐the‐art carving algorithm for flow network derivation in a low‐relief, agricultural landscape characterized by a large number of spurious, topographic depressions. Our results show that the investigated algorithm reconstructs a benchmark network insufficiently in terms of carving energy, distance and a topological network measure. The modification to the algorithm that performed best, combines the least‐cost auxiliary topography (LCAT) carving with a constrained breaching algorithm that explicitly takes automatically identified channel locations into account. We applied our methods to a low relief landscape, but the results can be transferred to flow network derivation of DEMs in moderate to mountainous relief in situations where the valley bottom is broad and flat and precise derivations of the flow networks are needed. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

Erratum to: Investigation of the geochemical impact of CO2 on shallow groundwater: design and implementation of a CO2 injection test in Northeast Germany     

Anita Peter  Hendrik Lamert  Matthias Beyer  Götz Hornbruch  Ben Heinrich  Alexandra Schulz  Helmut Geistlinger  Bernd Schreiber  Peter Dietrich  Ulrike Werban  Carsten Vogt  Hans-Hermann Richnow  Jochen Großmann  Andreas Dahmke 《Environmental Earth Sciences》2013,69(6):2123-2123

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Augmented Reality in astrophysics     

Frédéric P. A. Vogt  Luke J. Shingles 《Astrophysics and Space Science》2013,347(1):47-60

Augmented Reality consists of merging live images with virtual layers of information. The rapid growth in the popularity of smartphones and tablets over recent years has provided a large base of potential users of Augmented Reality technology, and virtual layers of information can now be attached to a wide variety of physical objects. In this article, we explore the potential of Augmented Reality for astrophysical research with two distinct experiments: (1) Augmented Posters and (2) Augmented Articles. We demonstrate that the emerging technology of Augmented Reality can already be used and implemented without expert knowledge using currently available apps. Our experiments highlight the potential of Augmented Reality to improve the communication of scientific results in the field of astrophysics. We also present feedback gathered from the Australian astrophysics community that reveals evidence of some interest in this technology by astronomers who experimented with Augmented Posters. In addition, we discuss possible future trends for Augmented Reality applications in astrophysics, and explore the current limitations associated with the technology. This Augmented Article, the first of its kind, is designed to allow the reader to directly experiment with this technology.  相似文献   

Visualizing Summertime Lightning Patterns on Colorado Fourteeners     

Brandon J. Vogt 《The Professional geographer》2013,65(1):41-57

In the context of lightning avoidance, this article explores temporal and spatial patterns of cloud-to-ground lightning strikes to Colorado Fourteeners, the popularly summited set of mountains that exceed 4,267 m (14,000 ft). The article describes the Fourteener concept, examines trends in lightning fatalities and injuries, and reviews thunderstorm climatology across the greater Colorado landscape. Fifteen years (1996–2010) of summertime lightning activity at near-summit locations are examined. Three measures characterize lightning activity for fifty-four Fourteeners: (1) overall strikes received, (2) lightning days, and (3) the time of day when lightning first strikes. Maps, histograms, and ranked lists identify trends and anomalies generated from the three measures. Examples of highest potential risks include Pikes Peak for Fourteener, Front Range for mountain range, and the third week of July for time of summer. The results can help avoid lightning when making long-term plans to visit Fourteeners and can heighten awareness when on Fourteeners. In addition to lightning avoidance, the article contributes to mountain geography and related atmospheric, physical, and social sciences.  相似文献   

Comment on: Geochemical and isotopic (Sr,U) variations of lake waters in the Ol’khon Region,Siberia, Russia: Origin and paleoenvironmental implications by F. Chabaux,M. Granet,P. Larqué, J. Riotte,E.V. Skliarov,O. Skliarova,L. Alexeieva,F. Risacher [C. R. Geoscience 343 (2011) 462–470]     

Thea Vogt 《Comptes Rendus Geoscience》2012,344(10):535-537

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Changes in North Sea storm surge conditions for four transient future climate realizations   总被引：1，自引：0，他引：1  

Lidia Gaslikova  Iris Grabemann  Nikolaus Groll 《Natural Hazards》2013,66(3):1501-1518

Storm surges in the North Sea are one of the threats for coastal infrastructure and human safety. Under an anthropogenic climate change, the threat of extreme storm surges may be enlarged due to changes in the wind climate. Possible future storm surge climates based on transient simulations (1961–2100) are investigated with a hydrodynamical model for the North Sea. The climate change scenarios are based on regionalized meteorological conditions with the regional climate model CCLM which is forced by AR4 climate simulations with the general circulation model ECHAM5/MPIOM under two IPCC emission scenarios (SRES A1B and B1) and two initial conditions. Possible sea level rise in the North Sea is not taken into account. The analysis of future wind-induced changes of the water levels is focused on extreme values. Special emphasis is given to the southeastern North Sea (German Bight). Comparing the 30-year averages of the annual 99 percentiles of the wind-induced water levels between the four climate realizations and the respective control climates, a small tendency toward an increase is inferred for all climate change realizations toward the end of the twenty-first century. Concerning the German Bight, the climate change signals are higher for the North Frisian coastal areas than for the East Frisian ones. This is consistent with an increase in frequency of strong westerly winds. Considering the whole time series (1961–2100) for selected areas, this tendency is superimposed with strong decadal fluctuations. It is found that uncertainties are related not only to the used models and emission scenarios but also to the initial conditions pointing to the internal natural variability.  相似文献   

A critical evaluation of calcium isotope ratios in tests of planktonic foraminifers   总被引：1，自引：0，他引：1  

Nikolaus Gussone  Bärbel Hönisch  Anton Eisenhauer  Christoph Hemleben 《Geochimica et cosmochimica acta》2009,73(24):7241-5818

We critically evaluate the applicability of Ca-isotope ratios in planktonic foraminifers as proxy for past sea surface temperatures (SST) and isotope composition of paleo-seawater (δ⁴⁴Ca_sw) reconstructions. Previous studies have shown discrepancies regarding the temperature sensitivity of Ca isotope fractionation in foraminifers of more than one order of magnitude. We present new data from the planktonic foraminifer species Orbulina universa, Globigerinoides sacculifer and Neogloboquadrina pachyderma (sinistral) from culture experiments, multinet deployments and coretop samples. Specimens of G. sacculifer cultured at low salinities (33-34.5) show predominantly no major temperature dependent Ca isotope fractionation, in contrast to previous individuals cultured at higher salinities of 34.5-36. The new data of O. universa are consistent with previously published results, revealing a small but significant temperature sensitivity. Calcium isotope fractionation in tests of N. pachyderma shows a significant variation with temperature, which is not uniform over the total investigated temperature range (−1.6 °C to +10 °C), possibly reflecting the influence of additional controlling factors besides temperature. Controlled dissolution experiments in the laboratory indicate that the Ca-isotope composition of G. sacculifer and N. pachyderma is relatively insensitive to partial dissolution of their tests.Calcium isotope ratios in the planktonic foraminifers G. sacculifer and N. pachyderma (s) reveal a complex Ca isotope fractionation behaviour, which is not yet fully understood. Additional validation studies are crucial to enhance the basic understanding of the calcium isotope systematics in planktic foraminifer shells, and the potential for applying Ca-isotope ratios as proxies for seawater temperature and the oceanic Ca budget.  相似文献