Assessing water contamination risk from vegetation fires: Challenges,opportunities and a framework for progress          下载免费PDF全文

Joao P. Nunes  Stefan H. Doerr  Gary Sheridan  Jonay Neris  Cristina Santín  Monica B. Emelko  Uldis Silins  Peter R. Robichaud  William J. Elliot  Jacob Keizer 《水文研究》2018,32(5):687-694

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Hydrology needed to manage droughts: the 2015 European case   总被引：1，自引：0，他引：1       下载免费PDF全文

Henny A.J. Van Lanen  Gregor Laaha  Daniel G. Kingston  Tobias Gauster  Monica Ionita  Jean‐Philippe Vidal  Radek Vlnas  Lena M. Tallaksen  Kerstin Stahl  Jamie Hannaford  Claire Delus  Miriam Fendekova  Luis Mediero  Christel Prudhomme  Ekaterina Rets  Renata J. Romanowicz  Sébastien Gailliez  Wai Kwok Wong  Mary‐Jeanne Adler  Veit Blauhut  Laurie Caillouet  Silvia Chelcea  Natalia Frolova  Lukas Gudmundsson  Martin Hanel  Klaus Haslinger  Maria Kireeva  Marzena Osuch  Eric Sauquet  James H. Stagge  Anne F. Van Loon 《水文研究》2016,30(17):3097-3104

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Ice-margin retreat and grounding-zone dynamics during initial deglaciation of the Storfjordrenna Ice Stream,western Barents Sea     

Calvin S. Shackleton  Monica C. M. Winsborrow  Karin Andreassen  Renata G. Lucchi  Lilja R. Bjarnadóttir 《Boreas: An International Journal of Quaternary Research》2020,49(1):38-51

Processes occurring at the grounding zone of marine terminating ice streams are crucial to marginal stability, influencing ice discharge over the grounding-line, and thereby regulating ice-sheet mass balance. We present new marine geophysical data sets over a ~30×40 km area from a former ice-stream grounding zone in Storfjordrenna, a large cross-shelf trough in the western Barents Sea, south of Svalbard. Mapped ice-marginal landforms on the outer shelf include a large accumulation of grounding-zone deposits and a diverse population of iceberg ploughmarks. Published minimum ages of deglaciation in this region indicate that the deposits relate to the deglaciation of the Late Weichselian Storfjordrenna Ice Stream, a major outlet of the Barents Sea–Svalbard Ice Sheet. Sea-floor geomorphology records initial ice-stream retreat from the continental shelf break, and subsequent stabilization of the ice margin in outer-Storfjordrenna. Clustering of distinct iceberg ploughmark sets suggests locally diverse controls on iceberg calving, producing multi-keeled, tabular icebergs at the southern sector of the former ice margin, and deep-drafted, single-keeled icebergs in the northern sector. Retreat of the palaeo-ice stream from the continental shelf break was characterized by ice-margin break-up via large calving events, evidenced by intensive iceberg scouring on the outer shelf. The retreating ice margin stabilized in outer-Storfjordrenna, where the southern tip of Spitsbergen and underlying bedrock ridges provide lateral and basal pinning points. Ice-proximal fans on the western flank of the grounding-zone deposits document subglacial meltwater conduit and meltwater plume activity at the ice margin during deglaciation. Along the length of the former ice margin, key environmental parameters probably impacted ice-margin stability and grounding-zone deposition, and should be taken into consideration when reconstructing recent changes or predicting future changes to the margins of modern ice streams.  相似文献   

Quantification of displacement and particle crushing around a penetrometer tip     

Eshan Ganju  Fei Han  Monica Prezzi  Rodrigo Salgado  Juliana Spohr Pereira 《地学前缘(英文版)》2020,(2):389-399

Particle crushing occurs near the tip of a penetrometer and influences the development of the tip resistance.To study particle crushing near a penetrometer tip,a cone penetrometer was monotonically jacked and then load-tested in medium dense and dense silica sand samples prepared in a halfcylindrical calibration chamber with viewing windows.During the tests,images of the advancing penetrometer and the surrounding soil were taken using digital cameras and analyzed to obtain the displacement and strain fields around the penetrometer using the Digital Image Correlation(DIC)technique.Subsequently,soil samples were collected near the tip of the penetrometer using a novel agarimpregnation technique and digitized using an X-ray microscope.The digitized samples were analyzed to reconstruct the three-dimensional models of individual particles,generating the gradation and relative breakage parameters of the sand around the cone penetrometer.  相似文献   

Observational information on a temperate reef community helps understanding the marine climate and ecosystem shift of the 1980–90s     

Giulia Gatti  Carlo Nike Bianchi  Monica Montefalcone  Sara Venturini  Giovanni Diviacco  Carla Morri 《Marine pollution bulletin》2017,114(1):528-538

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Impact of a harbour construction on the benthic community of two shallow marine caves     

Ettore Nepote  Carlo Nike Bianchi  Carla Morri  Marco Ferrari  Monica Montefalcone 《Marine pollution bulletin》2017,114(1):35-45

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The Emergence of Digital Twins in Remediation: How Platform Synchrony Will Change the Model for Delivery     

John Horst  Nick Welty  Allison Yanites  Francois Appere  Monica Dupre  Shahansha Shaik 《Ground Water Monitoring & Remediation》2020,40(3):14-20

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Holocene settlement in the rio de la plata littoral (argentina): A methodological approach     

Monica Salemme  Laura Miotti  Marina Aquirre 《Geoarchaeology》1989,4(1):69-80

Cultural and faunal remains from archaeological sites of the Rio de La Plata littoral, Argentina, have been studied, attempting to verify their primary associations and occupations during the Holocene. the sites were localized within shell beach ridges more or less parallel to the present shore and are composed of bivalves, gastropods, scarce barnacles, and sandy sediments. the thanatocoenosis found could be equivalent to a transitional area between fluviomarine (mixohaline) and oceanic (polyeuhaline) gradients, i.e., an environment with greater salinity conditions than that of the adjacent coast in the present estuary. These deposits correspond to the Las Escobas Formation (Holocene). Archaeological remains were found from the base of the shell ridge up into the overlying sediments. the hypothesis proposed here is that the human occupation is not contemporaneous with the formation of the shell ridge. the cultural sequence in this kind of site can be altered by disturbances of the stratigraphy as a consequence of environmental and geological events.  相似文献   

Phylogeography of the rocky intertidal periwinkle Echinolittorina paytensis through a biogeographic transition zone in the Southeastern Pacific     

Sergio P. Barahona  Ximena Vlez‐Zuazo  Monica Santa‐Maria  Aldo S. Pacheco 《Marine Ecology》2019,40(4)

Barriers to dispersal are recognized to play an important role in the differentiation of populations and ultimately in speciation. In the southeast Pacific, on the northern coast of Peru, a transition zone between the Peruvian and Panamic marine biogeographic provinces exists. Here, the convergence between two contrasting surface currents could generate a barrier effect for the larval dispersal of meroplanktonic invertebrates, which could in turn generate differentiated populations or genetic lineages on both sides of the transition zone. To address this, we studied to Echinolittorina paytensis, an abundant rocky intertidal periwinkle that spans both biogeographic provinces. A total of 95 individuals from Ecuador (2°19′S) to central Peru (7°31′S), covering the Panamic Province, the Peruvian Province, and the transition zone between, were collected. The mitochondrial markers cytochrome c oxidase I and 16SrRNA were sequenced in order to investigate phylogeography and genetic structuring. In general, no genetic structuring was found across the transition zone, suggesting this biogeographic boundary would not be acting as a barrier in this species. Factors such as a high larval dispersal capability and the occurrence of El Niño–Southern Oscillation events such as El Niño are discussed.  相似文献   

The influence of coastal dynamics on the upper limit of the Posidonia oceanica meadow     

Matteo Vacchi  Monica Montefalcone  Carlo Nike Bianchi  Carla Morri  Marco Ferrari 《Marine Ecology》2010,31(4):546-554

The recognized ecological importance of Posidonia oceanica, the most important seagrass of the Mediterranean Sea, makes it crucial to assess the state of health of its meadows, discriminating natural from anthropogenic impacts. In this paper, the hydrodynamic conditions at the upper limit of P. oceanica meadows along the Ligurian coast (NW Mediterranean Sea) were investigated. A relationship between the distance of the upper limit of the meadow from the shoreline and the morphodynamic domain of the beach (i.e. distinctive types of beach produced by the topography, wave climate and sediment composition) was found. A zonation of the state of the shallow portions of the meadows down the submerged beach profile was identified. Zone a, from the shoreline to the breaking limit, is naturally critical for the development of the meadow. Zone b, from the breaking limit to the closure depth, is subjected to natural and human impacts. Zone c, below the closure depth, is little influenced by coastal dynamics. This study quantifies for the first time how much the status of the shallow portions of P. oceanica meadows is dependent on coastal dynamics, which is important for their proper management.  相似文献