Book review     

S. J. Gibowicz  Jeremy Bloxham  Petr Vaniček  Gerardo G. Tango  Gerardo G. Tango  Lev Truskinovsky  Konrad Bajer  Krzysztof Haman 《Pure and Applied Geophysics》1991,135(3):493-512

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X-ray computed microtomography—a useful tool for petrophysical properties determination     

Jadwiga A. Jarzyna  Paulina I. Krakowska  Edyta Puskarczyk  Kamila Wawrzyniak-Guz  Jakub Bielecki  Konrad Tkocz  Jacek Tarasiuk  Sebastian Wroński  Marek Dohnalik 《Computational Geosciences》2016,20(5):1155-1167

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Sub-regional snow cover distribution across the southern Appalachian Mountains     

Johnathan W. Sugg  Christopher M. Fuhrmann  L. Baker Perry  Dorothy K. Hall  Charles E. Konrad II 《自然地理学》2017,38(2):105-123

Abstract

Snowfall in the Southern Appalachian Mountain region of the eastern US is characterized by much spatiotemporal variability. Annual snowfall totals vary by up to 75 cm, and variations in snowfall intensity can lead to large differences in the local snowfall distribution. Research has shown that the synoptic pattern associated with the snowfall strongly influences the regional-scale distribution of snow cover. However, topographic variability results in locally complex snow cover patterns that are not well understood or documented. In this study, we characterize the snow covered area (SCA) and fractional snow cover associated with different synoptic patterns in 14 individual sub-regions. We analyze 63 snow events using Moderate-resolution Imaging Spectroradiometer standard snow cover products to ascertain both qualitative and quantitative differences in snow cover across sub-regions. Among sub-regions, there is significant variation in the snow cover pattern from individual synoptic classes. Furthermore, the percent SCA follows the regional snowfall climatology, and sub-regions with the highest elevations and northerly latitudes exhibit the greatest variability. Results of the sub-regional analysis provide valuable guidance to forecasters by contributing a deeper understanding of local snow cover patterns and their relationship to synoptic-scale circulation features.  相似文献   

Buchbesprechungen     

F. Steinhauser  P. Steinhauser  K. Cehak 《Meteorology and Atmospheric Physics》1968,17(2-3):290-300

Ohne Zusammenfassung  相似文献   

Bücher- und Zeitschriftenschau     

Bubnoff  Konrad Richter  Wilckens 《International Journal of Earth Sciences》1933,24(1-2):122-124

Ohne Zusammenfassung  相似文献   

Ergebnisse und Aussichten der Gefügeforschung im pommerschen Diluvium     

Konrad Richter 《International Journal of Earth Sciences》1936,27(2):196-206

Zusammenfassung Die Bewegungsrichtungen der diluvialen, nordischen Inlandeismassen können mit ihren Veränderungen des Nachschubes auf Grund ihres Geschiebeinventars in. Norddeutschland festgestellt werden. Derartige Eisstromstriche im großen stehen mit den lokalen Lagerungsverhältnissen diluvialer Schichtpakete des Jungmoränengebietes sehr oft im Widerspruch. Besonders ist das im küstennahen Gebiet Norddeutschlands der Fall. Selten sind genügend große Aufschlüsse vorhanden, die aus der Art der Schichtenlagerung die bis 90^° betragenden Abweichungen von der normalen Bewegungsrichtung des Inlandeises erkennen lassen. Es wird daher das Kleingefüge der Geschiebemergel zum Erkennen dieser Abweichungen benutzt. Im allgemeinen wurden die Geschiebe im Eis als Stromlinienkörper bewegt, so daß für Pommern eine Karte beigegeben ist, die eine Glazialschrammenkarte ersetzt. Sie läßt die stärkeren lokalen Schwankungen im küstennahen Gebiet deutlich erkennen. Weitere Einregelungsstudien in fluvioglazialen Sedimenten führten besonders bei Osern zur Möglichkeit, ehemalige Stromrichtungen und -stärken festzustellen. Als Darstellungsmethode werden Gefügediagramme empfohlen, wie sieSander, Rüger u. a. vorwiegend bei Schmelztektoniten benutzten. Die Urstromtäler und großen radialen Rinnen in Norddeutschland bergen noch Probleme, die voraussichtlich mit Einregelungsstudien zu lösen sind.  相似文献   

Bücher- und Zeitschriftenschau     

Bubnoff  L. Rutten  Ernst Habetha  Kienow  Strassl  Konrad Richter  Stickel  Gallwitz  Wilckens 《International Journal of Earth Sciences》1937,28(8):629-641

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Far-infrared emission from an intergalactic dust cloud?     

Bogdan Wszolek  Konrad Rudnicki  Silvia Masi  Paolo De Bernardis  Antonio Salvi 《Astrophysics and Space Science》1989,152(1):29-34

We used theIRAS All Sky Maps in order to search for infrared emission in the direction of the Okroy Cloud (R.A.=12^h50^m, =22°). An enhancement of 100 m diffuse emission is evident in such a region, with an anomalous value of the ratioI _v (100 m)/A _v ; hydrogen 21 cm emission is also present with low radial speed, thus suggesting that the cloud could be a satellite of our Galaxy.  相似文献   

Hydrologic metrics for status‐and‐trends monitoring in urban and urbanizing watersheds          下载免费PDF全文

Derek B. Booth  Christopher P. Konrad 《水文研究》2017,31(25):4507-4519

Local governmental agencies are increasingly undertaking potentially costly “status‐and‐trends” monitoring to evaluate the effectiveness of stormwater control measures and land‐use planning strategies or to satisfy regulatory requirements. Little guidance is presently available for such efforts, and so we have explored the application, interpretation, and temporal limitations of well‐established hydrologic metrics of runoff changes from urbanization, making use of an unusually long‐duration, high‐quality data set from the Pacific Northwest (USA) with direct applicability to urban and urbanizing watersheds. Three metrics previously identified for their utility in identifying hydrologic conditions with biological importance that respond to watershed urbanization—T_Qmean (the fraction of time that flows exceed the mean annual discharge), the Richards‐Baker Index (characterizing flashiness relative to the mean discharge), and the annual tally of wet‐season day‐to‐day flow reversals (the total number of days that reverse the prior days' increasing or decreasing trend)—are all successful in stratifying watersheds across a range of urbanization, as measured by total contributing area of urban development. All metrics respond with statistical significance to multidecadal trends in urbanization, but none detect trends in watershed‐scale urbanization over the course of a single decade. This suggests a minimum period over which dependable trends in hydrologic alteration (or improvement) can be detected with confidence. The metrics also prove less well suited to urbanizing watersheds in a semi‐arid climate, with only flow reversals showing a response consistent with prior findings from more humid regions. We also explore the use of stage as a surrogate for discharge in calculating these metrics, recognizing potentially significant agency cost savings in data collection with minimal loss of information. This approach is feasible but cannot be implemented under current data‐reporting practices, requiring measurement of water‐depth values and preservation of the full precision of the original recorded data. With these caveats, however, hydrologic metrics based on stage should prove as or more useful, at least in the context of status‐and‐trends monitoring, as those based on subsequent calculations of discharge.  相似文献   

New active galactic nuclei science cases with interferometry     

Sebastian F. Hönig  Almudena Alonso Herrero  Poshak Gandhi  Makoto Kishimoto  Jörg-Uwe Pott  Cristina Ramos Almeida  Jean Surdej  Konrad R. W. Tristram 《Experimental Astronomy》2018,46(3):413-419

Infrared (IR) interferometry has made widely recognised contributions to the way we look at the dusty environment of supermassive black holes on parsec scales. It finally provided direct evidence for orientation-dependent unification of active galaxies, however it also showed that the classical “torus” picture is oversimplified. New scientific opportunities for AGN have been suggested, and will soon be carried out, focusing on the dynamical aspects of spectrally and spatially resolved interferometry, as well as the potential to employ interferometry for cosmology. This will open interferometry to new scientific communities.  相似文献