Numerical Prediction of Cold Season Fog Events over Complex Terrain: the Performance of the WRF Model During MATERHORN-Fog and Early Evaluation     

Zhaoxia Pu  Catherine N. Chachere  Sebastian W. Hoch  Eric Pardyjak  Ismail Gultepe 《Pure and Applied Geophysics》2016,173(9):3165-3186

  相似文献   

Assessment of the Black Sea observing system. A focus on 2005-2012 Argo campaigns     

Sebastian Grayek  Emil V. Stanev  Johannes Schulz-Stellenfleth 《Ocean Dynamics》2015,65(12):1665-1684

  相似文献   

UV‐Irradiation of the Antibiotic Sulfathiazole Surprisingly Leads to Former Antituberculotic Promizole          下载免费PDF全文

Astrid Spielmeyer  Myriam Heer  Siegrun A.I. Mohring  Heike Hausmann  Jessica Stahl  Manfred Kietzmann  Sebastian Dold  Bernhard Spengler  Gerd Hamscher 《洁净——土壤、空气、水》2015,43(4):490-495

  相似文献   

Greenland and Antarctica Ice Sheet Mass Changes and Effects on Global Sea Level   总被引：1，自引：0，他引：1  

Rene Forsberg  Louise Sørensen  Sebastian Simonsen 《Surveys in Geophysics》2017,38(1):89-104

Thirteen years of GRACE data provide an excellent picture of the current mass changes of Greenland and Antarctica, with mass loss in the GRACE period 2002–2015 amounting to 265 ± 25 GT/year for Greenland (including peripheral ice caps), and 95 ± 50 GT/year for Antarctica, corresponding to 0.72 and 0.26 mm/year average global sea level change. A significant acceleration in mass loss rate is found, especially for Antarctica, while Greenland mass loss, after a corresponding acceleration period, and a record mass loss in the summer of 2012, has seen a slight decrease in short-term mass loss trend. The yearly mass balance estimates, based on point mass inversion methods, have relatively large errors, both due to uncertainties in the glacial isostatic adjustment processes, especially for Antarctica, leakage from unmodelled ocean mass changes, and (for Greenland) difficulties in separating mass signals from the Greenland ice sheet and the adjacent Canadian ice caps. The limited resolution of GRACE affects the uncertainty of total mass loss to a smaller degree; we illustrate the “real” sources of mass changes by including satellite altimetry elevation change results in a joint inversion with GRACE, showing that mass change occurs primarily associated with major outlet glaciers, as well as a narrow coastal band. For Antarctica, the primary changes are associated with the major outlet glaciers in West Antarctica (Pine Island and Thwaites Glacier systems), as well as on the Antarctic Peninsula, where major glacier accelerations have been observed after the 2002 collapse of the Larsen B Ice Shelf.  相似文献   

Solifluction meets vegetation: the role of biogeomorphic feedbacks for turf‐banked solifluction lobe development          下载免费PDF全文

Jana Eichel  Daniel Draebing  Lasse Klingbeil  Markus Wieland  Christian Eling  Sebastian Schmidtlein  Heiner Kuhlmann  Richard Dikau 《地球表面变化过程与地形》2017,42(11):1623-1635

Vegetation is an important factor influencing solifluction processes, while at the same time, solifluction processes and landforms influence species composition, fine‐scale distribution and corresponding ecosystem functioning. However, how feedbacks between plants and solifluction processes influence the development of turf‐banked solifluction lobes (TBLs) and their geomorphic and vegetation patterns is still poorly understood. We addressed this knowledge gap in a detailed biogeomorphic investigation in the Turtmann glacier foreland (Switzerland). Methods employed include geomorphic and vegetation mapping, terrain assessment with unmanned aerial vehicle (UAV) and temperature logging. Results were subsequently integrated with knowledge from previous geomorphic and ecologic studies into a conceptual model. Our results show that geomorphic and vegetation patterns at TBLs are closely linked through the lobe elements tread, risers and ridge. A conceptual four‐stage biogeomorphic model of TBL development with ecosystem engineering by the dwarf shrub Dryas octopetala as the dominant process can explain these interlinked patterns. Based on this model, we demonstrate that TBLs are biogeomorphic structures and follow a cyclic development, during which the role of their components for engineer and non‐engineer species changes. Our study presents the first biogeomorphic model of TBL development and highlights the applicability and necessity of biogeomorphic approaches and research in periglacial environments. Copyright © 2016 John Wiley & Sons, Ltd.  相似文献   

A first application of a marine inductive source electromagnetic configuration with remote electric dipole receivers: Palinuro Seamount,Tyrrhenian Sea          下载免费PDF全文

Roxana Safipour  Sebastian Hölz  Marion Jegen  Andrei Swidinsky 《Geophysical Prospecting》2018,66(7):1415-1432

We study a new marine electromagnetic configuration that consists of a ship‐towed inductive source transmitter and a series of remote electric dipole receivers placed on the seafloor. The approach was tested at the Palinuro Seamount in the southern Tyrrhenian Sea, at a site where massive sulphide mineralization has been previously identified by shallow drilling. A 3D model of the Palinuro study area was created using bathymetry data, and forward modelling of the electric field diffusion was carried out using a finite volume method. These numerical results suggest that the remote receivers can theoretically detect a block of shallowly buried conductive material at up to ～100 m away when the transmitter is located directly above the target. We also compared the sensitivity of the method using either a horizontal loop transmitter or a vertical loop transmitter and found that when either transmitter is located directly above the mineralized zone, the vertical loop transmitter has sensitivity to the target at a farther distance than the horizontal loop transmitter in the broadside direction by a few tens of metres. Furthermore, the vertical loop transmitter is more effective at distinguishing the seafloor conductivity structure when the vertical separation between transmitter and receiver is large due to the bathymetry. As a horizontal transmitter is logistically easier to deploy, we conducted a first test of the method with a horizontal transmitter. Apparent conductivities are calculated from the electric field transients recorded at the remote receivers. The analysis indicates higher apparent seafloor conductivities when the transmitter is located near the mineralized zone. Forward modelling suggests that the best match to the apparent conductivity data is obtained when the mineralized zone is extended southward by 40 m beyond the zone of previous drilling. Our results demonstrate that the method adds value to the exploration and characterization of seafloor massive sulphide deposits.  相似文献   

Characterizing spatiotemporal trends in extreme precipitation in Southeast Texas     

Fagnant  Carlynn  Gori  Avantika  Sebastian  Antonia  Bedient  Philip B.  Ensor  Katherine B. 《Natural Hazards》2020,104(2):1597-1621

Natural Hazards - Rainfall extreme value analysis provides information that has been crucial in characterizing risk, designing successful infrastructure systems, and ultimately protecting people...  相似文献   

Soft X-ray Focusing Telescope Aboard AstroSat: Design,Characteristics and Performance     

K. P. Singh  G. C. Stewart  N. J. Westergaard  S. Bhattacharayya  S. Chandra  V. R. Chitnis  G. C. Dewangan  A. T. Kothare  I. M. Mirza  K. Mukerjee  V. Navalkar  H. Shah  A. F. Abbey  A. P. Beardmore  S. Kotak  N. Kamble  S. Vishwakarama  D. P. Pathare  V. M. Risbud  J. P. Koyande  T. Stevenson  C. Bicknell  T. Crawford  G. Hansford  G. Peters  J. Sykes  P. Agarwal  M. Sebastian  A. Rajarajan  G. Nagesh  S. Narendra  M. Ramesh  R. Rai  K. H. Navalgund  K. S. Sarma  R. Pandiyan  K. Subbarao  T. Gupta  N. Thakkar  A. K. Singh  A. Bajpai 《Journal of Astrophysics and Astronomy》2017,38(2):29

The Soft X-ray focusing Telescope (SXT), India’s first X-ray telescope based on the principle of grazing incidence, was launched aboard the AstroSat and made operational on October 26, 2015. X-rays in the energy band of 0.3–8.0 keV are focussed on to a cooled charge coupled device thus providing medium resolution X-ray spectroscopy of cosmic X-ray sources of various types. It is the most sensitive X-ray instrument aboard the AstroSat. In its first year of operation, SXT has been used to observe objects ranging from active stars, compact binaries, supernova remnants, active galactic nuclei and clusters of galaxies in order to study its performance and quantify its characteriztics. Here, we present an overview of its design, mechanical hardware, electronics, data modes, observational constraints, pipeline processing and its in-orbit performance based on preliminary results from its characterization during the performance verification phase.  相似文献   

Whose sustainability? Top–down participation and emergent rules in marine protected area management in Indonesia     

Marion Glaser  Wasistini Baitoningsih  Sebastian C.A. Ferse  Muhammad Neil  Rio Deswandi 《Marine Policy》2010

A review of a major community-based marine protected area programme (CB-MPA) in an Indonesian island archipelago is the point of departure for this article. Despite a well-designed institutional structure to facilitate local participation, local knowledge about the CB-MPA is found to be low and resource access and influence on decision-making in the programme is negligible for the majority of islanders. At the same time, most of those who know about the programme consider it as pertaining to the public authority only. These findings stand in contrast to evidence on non-formal ways of protecting and managing marine areas in the same geographical area but outside the formal MPA institutional framework. In particular, the article identifies a number of emergent rules-in-use in marine management, which operate parallel to legally established MPAs. It is argued that emergent forms of marine area protection such as non-formal self-organising island exclusion zones (IEZ) offer as yet mostly unused potentials for formal MPA development, particularly in those coastal and marine areas without traditional forms of marine and coastal management.  相似文献   

Unanswered questions on the Budyko framework     

Wouter R. Berghuijs  Sebastian J. Gnann  Ross A. Woods 《水文研究》2020,34(26):5699-5703

  相似文献