TY - JOUR AU - Baroni, Carlo AU - Tenti, Martina AU - Bart, Philip J. AU - Salvatore, Maria Cristina AU - Gasperini, Luca AU - Busetti, Martina AU - Sauli, Chiara AU - Stucchi, Eusebio Maria AU - Tognarelli, Andrea TI - ANTARCTIC ICE SHEET RE-ADVANCE DURING THE ANTARCTIC COLD REVERSAL IDENTIFIED IN THE WESTERN ROSS SEA JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 45 PY - 2022 IS - 1 SP - 3 EP - 18 PG - 18 SN - 0391-9838 DO - 10.4461/GFDQ.2022.45.1 UR - https://m2.mtmt.hu/api/publication/34292828 ID - 34292828 AB - Marine geophysical data collected from the Ross Sea continental shelf during several oceanographic expeditions enabled evaluation of the Last Glacial Maximum (LGM) extent of the Antarctic Ice Sheet (AIS) through the presence of large Grounding Zone Wedges (GZWs), particularly evident in the outer reaches of the Drygalski and Joides basins to the north of Coulman Island. Seismo-stratigraphic obser-vations confirmed by geomorphological and stratigraphic data show a deep grounding line embayment dating back to the early deglacial transition, which preceded the last rapid sea-level and atmospheric CO2 rise. In this work, a new reconstruction based on the analysis of mor-pho-bathymetric and seismic reflection data from the middle reaches of the Drygalski Basin shows that the post-LGM retreat was followed by a short-lived re-advance of the grounding line during the Antarctic Cold Reversal (ACR). Evidences include GZWs that partly overprint mega-scale glacial lineations associated with the Coulman Island grounding line, followed by a Holocene retreat phase, which caused the final south-ward withdrawal of the grounded and floating ice. This late re-advance suggests a significant impact on the extent and thickness of the ground-ed ice from relatively small amplitude climate oscillations, able to exert a significant control on the AIS during the latest Pleistocene (i.e. the Last Glacial Termination). Given that the marine-based portion of the AIS in the Ross Sea was sensitive to millennial-scale climate oscillations, this evidence will contribute to clarify how the ice sheet may respond to ongoing and future climate change. LA - English DB - MTMT ER - TY - JOUR AU - Carturan, Luca AU - Gasperini, Norman TI - GEOMORPHIC IMPRINT OF A SMALL GLACIER AND ITS RAPID VANISHING DURING 20th CENTURY: THE MARMOTTE GLACIER (ORTLES-CEVEDALE, ITALY) br JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 44 PY - 2021 IS - 2 SP - 139 EP - 157 PG - 21 SN - 0391-9838 DO - 10.4461/GFDQ.2021.44.11 UR - https://m2.mtmt.hu/api/publication/34032510 ID - 34032510 N1 - Export Date: 23 June 2023 Correspondence Address: Carturan, L.; Department of Land, Legnaro, Italy; email: luca.carturan@unipd.it AB - Carturan l. & Gasperini n.,Geomorphic imprint of a small glacier and its rapid vanishing during 20th century: the Marmotte Gla-cier (Ortles-Cevedale, Italy). (IT ISSN 0391-9838, 2021).This work presents a glaciological and geomorphological study car-ried out on an area of three square kilometers in the southern part of the Ortles-Cevedale Group. In this area, at the head of the Val di Peio (Province of Trento), a small glacier existed until the first half of the 20thcentury, named Marmotte Glacier. This study was aimed at defining the maximum extent of the glacier during the Little Ice Age (LIA), recon-structing its fluctuations in the last century, and providing a geomorpho-logical context through the compilation of a detailed geomorphological map, at the scale of 1:2500.A geomorphological survey was performed in the field, combining different survey techniques for establishing the transport history of gla-cigenic sediments and the relative age since deglaciation of rock surfaces. Historical glacier fluctuations have been reconstructed analysing histor-ical sources, in particular old photos (aerial and oblique terrestrial pho-tos) and glaciological observations started in the 1920s.During the LIA, the glacier extent was 0.33 km2, but already in the 1940s it was 40% smaller, and quickly become a glacieret by the end of the 1950s. In the following decades, the ice body went through a rapid fragmentation and completely vanished in the early 2000s. These results point to a high climatic sensitivity and high vulnerability for this small glacier, whose reconstructed equilibrium line altitude (ELA) matches very well with ELAs reconstructed for neighbouring glaciers in the LIA. This study provides evidence for significant marginal glaciation (i.e. the existence of very small glaciers and glacierets) during the LIA, in areas where geomorphological evidence is poorly expressed or even absent. LA - English DB - MTMT ER - TY - JOUR AU - Whalley, W. Brian TI - MAPPING SMALL GLACIERS, ROCK GLACIERS AND RELATED FEATURES IN AN AGE OF RETREATING GLACIERS: USING DECIMAL LATITUDE-LONGITUDE LOCATIONS AND 'GEOMORPHIC INFORMATION TENSORS' JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 44 PY - 2021 IS - 1 SP - 39 EP - 51 PG - 15 SN - 0391-9838 DO - 10.4461/GFDQ.2021.44.4 UR - https://m2.mtmt.hu/api/publication/33501671 ID - 33501671 N1 - Cited By :1 Export Date: 22 February 2023 Correspondence Address: Whalley, W.B.; University of SheffieldUnited Kingdom; email: b.whalley@sheffield.ac.uk AB - The need to study and record small, vanishing or vanished glaciers, moraines and rock glaciers, is examined with respect to climate changes since the Little Ice Age maximum. Geo-location, rather than just naming a location or inventory entry, should be used to allow comparisons with earlier records (in papers, as maps, images and inventories) and in subsequent research. Geo-locations can be given as metadata in texts, tables and figures with a decimal Latitude-Longitude (dLL) specified as a comma separated string. Linking a dLL to a topographic feature allows identification of and searching for landscape elements in a landsystem with a precision given by the decimal places used. Google EarthTM provides a convenient way to find a dLL as well as examine landform elements and relationships between those elements. A dLL defined location can also act as an origin for a transect, with a bearing incorporated as a three-element csv string. Locations and bearings can be derived from Google Earth (TM) as well as displayed on images. Information, such as slope elements, can be added to a transect to give a geo-referenced `geomorphic information tensor'. Examples show how these devices can be used to explore connectivity relationships between rock glaciers, debris-charged small glaciers and ice patches. This has implications for future mapping and inventories such as the Randolph Glacier Inventory as well as mapping sites of potential hazards. LA - English DB - MTMT ER - TY - JOUR AU - Traversa, Giacomo AU - Zappetti, Marta AU - Senese, Antonella TI - QUATERNARY PHYSICAL AND DYNAMIC GEOGRAPHY JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 44 PY - 2021 IS - 1 SP - 79 EP - 90 PG - 14 SN - 0391-9838 DO - 10.4461/GFDQ.2021.44.7 UR - https://m2.mtmt.hu/api/publication/33247029 ID - 33247029 AB - TRAvERsA G., ZAppETTi M., sENEsE A., Spring and Sum -mer Spatial Evolution of Blue Ice Areas in Antarctica. (IT ISSN 0391-9838, 2021). Blue ice areas (BIAs) are relevant ablation surfaces present on the Antarctic continent, mainly located in proximity of the coast or moun-tainous zones, in sloping areas. Featuring negative values of surface mass balance, in a continent where this parameter is averagely positive, their study gains of importance, in particular regarding their evolution in time and space and the reasons of their variations. Therefore, taking advan-tage of remote sensing techniques and satellite products, we analysed the intra-annual BIA variation in 2000-2021 spring-summer periods. Basing the detection on topographic slope and albedo values from MCD43A3 product of Moderate Resolution Imaging Spectroradiometer (MODIS), trends are detected for all the analysed seasons, showing a steady and significant increase from the spring to the summer and only in half of the cases a final decrease in early autumn. Comparing these areal patterns with meteorological parameters (i.e., air temperature and wind speed) acquired by an automatic weather station located on the Amery Ice Shelf (Eastern Antarctica), a relation between positive temperatures and BIA increase was found (R = 0.60), possibly due to snow melting or sublima-tion processes, which expose the beneath bare blue ice. In addition, weak relations between area increase and high and steady wind speed condi-tions are detected. Finally, the areal decrease in early autumn observed in a certain number of seasons could be explained with intense phenom-ena of melting, as a result of continuing days of positive air temperatures, which lead to the formation of drainage systems, or with extreme solid precipitation events. In both the cases, water and snow cover the BIAs, making them impossible to be detected from remote techniques. LA - English DB - MTMT ER - TY - JOUR AU - Enkhbold, Altanbold AU - Dorjsuren, Batsuren AU - Khukhuudei, Ulambadrakh AU - Yadamsuren, Gansukh AU - Badarch, Daariimaa AU - Dorjgochoo, Sanchir AU - Gonchigjav, Yumchmaa AU - Nyamsuren, Odkhuu AU - Ragchaa, Gantulga AU - Gedefaw, Mohammed TI - IMPACT OF FAULTS ON THE ORIGIN OF LAKE DEPRESSIONS: A CASE STUDY OF BAYAN NUUR DEPRESSION, NORTH-WEST MONGOLIA, CENTRAL ASIA JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 44 PY - 2021 IS - 1 SP - 53 EP - 66 PG - 16 SN - 0391-9838 DO - 10.4461/GFDQ.2021.44.5 UR - https://m2.mtmt.hu/api/publication/32951491 ID - 32951491 AB - This study focuses on the impact of faults on the origin and depres-sion morphology of Bayan Nuur in North-West Mongolia. The relation-ships of Nuur and faults have been studied using morphometric analysis, spatially-improved remote sensing and magnetic survey. According to the results, the main fault formed in the western part of the Bayan Nuur depression influenced the origin of the lake depression SW-NE orient-ed. The length of the Bayan Nuur main fault is 147.1 km; 4 lakes have been formed along this fault, of which, the Bayan Nuur is the largest one. This study suggests that the Bayan Nuur origin is different from that suggested by previous studies and we conclude that the depressions hosting lakes in Mongolia need to be further investigated. This study represents a new contribution to better understand both the origin of the depressions hosting the Mongolian lakes and the impact of neotectonic activity, through morphometric analysis integrated with remote sensing analysis and geophysical surveys. LA - English DB - MTMT ER - TY - JOUR AU - Dean, S AU - Pappalardo, M AU - Felja, I AU - Juračić, M AU - Boschian, G TI - Karst landforms and prehistoric settlement patterns: A case study from Korčula Island (Croatia) JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 43 PY - 2021 IS - 1 SP - 31 EP - 43 PG - 13 SN - 0391-9838 DO - 10.4461/GFDQ.2020.43.3 UR - https://m2.mtmt.hu/api/publication/31887030 ID - 31887030 N1 - Export Date: 22 February 2021 LA - English DB - MTMT ER - TY - JOUR AU - STRAT, D. AU - Kiss, Klaudia AU - SZABÓ, J. AU - Móga, János TI - GEOMORPHOLOGICAL ASSESSMENT OF THE BECIU MUD VOLCANO TERRAIN, EASTERN CARPATHIANS, ROMANIA JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 43 PY - 2020 IS - 1 SP - 15 EP - 30 PG - 16 SN - 0391-9838 DO - 10.4461/GFDQ.2020.43.2 UR - https://m2.mtmt.hu/api/publication/31848062 ID - 31848062 N1 - University of Bucharest, Faculty of Geography, 1 Nicolae Bǎlcescu Blvd., Bucharest, Romania Eötvös Loránd University, Faculty of Sciences Physical Geography Department 1117, Pázmány P. allé 1/C, Budapest, Hungary Geographical Institute, Research Centre for Astronomy and Earth Sciences 1112, Budaörsi Street 45, Budapest, Hungary Cited By :1 Export Date: 8 December 2023 Correspondence Address: Móga, J.; Eötvös Loránd University, Pázmány P. allé 1/C, Hungary; email: jmoga@freemail.hu LA - English DB - MTMT ER - TY - JOUR AU - Tsanakas, Konstantinos AU - Karymbalis, Efthimios AU - Cundy, Andrew AU - Gaki-Papanastassiou, Kalliopi AU - Papanastassiou, Dimitris AU - Drinia, Hara AU - Koskeridou, Efterpi AU - Maroukian, Hampik TI - LATE HOLOCENE GEOMORPHIC EVOLUTION OF THE LIVADI COASTAL PLAIN, GULF OF ARGOSTOLI, CEPHALONIA ISLAND, WESTERN GREECE JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 42 PY - 2019 IS - 1 SP - 43 EP - 59 PG - 17 SN - 0391-9838 DO - 10.4461/GFDQ.2019.42.4 UR - https://m2.mtmt.hu/api/publication/31083313 ID - 31083313 N1 - Department of Geography, Harokopio University, Kalithea, Athens, GR-17671, Greece School of Ocean and Earth Science, University of Southampton, National Oceanography Center, Southampton, United Kingdom Faculty of Geology and Geoenvironment, National University of Athens, Athens, Greece Institute of Geodynamics, National Observatory of Athens, Athens, Greece Cited By :5 Export Date: 10 November 2023 Correspondence Address: TSANAKAS, K.; Department of Geography, Greece; email: ktsanakas@hua.gr AB - This study deals with the late Holocene evolution of the coastal swampy Livadi plain, which is located on the northern part of the Gulf of Argostoli (Cephalonia Island). Cephalonia Island is located at the northwest edge of the Hellenic Arc in a tectonically and seismically highly active area. For the purposes of the study, a detailed DEM, produced by topographic sheets (at the scale of 1:5000), was utilized for geomorphological mapping together with extensive fieldwork. In addition, four shallow boreholes, varying in depth from 3 to 5 m, were drilled using a portable vibratory corer. The stratigraphy has been described in detail and four samples (peat - plant material, foraminifera assemblages and shell material) were collected for radiocarbon dating. Additionally, sedimentological and micro/macrofaunal identifications of forty-five sediment samples from the various stratigraphic units were performed to reconstruct the palaeoenvironments of deposition. The results suggest that cores L1 and L2, which are located close to the present day shoreline, are marine/coastal dominated while cores L3 and L4 have a shallowing-upward sedimentary sequence since the lower units correspond to a marine environment of shore-face conditions, which progressively becomes a backshore brackish environment that gradually changes upwards to a terrestrial environment. The dated sea-level indicators (samples of peats, foraminifera and shells) from 5000-4000 BP are too high compared to local relative sea-level curves, indicating local coseismic uplift(s) of around 1 m before 1200 BP and after 4800 BP. This uplift idea is supported by recent (ca. 0.2 m) uplift observed clearly along the beach face at Livadi caused by the recent Cephalonia earthquake in 2014. LA - English DB - MTMT ER - TY - JOUR AU - Evelpidou, Niki AU - Kawasaki, Satoru AU - Karkani, Anna AU - Saitis, Giannis AU - Spada, Giorgio AU - Economou, Georgios TI - EVOLUTION OF RELATIVE SEA LEVEL IN OKINAWA (JAPAN) DURING HOLOCENE JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 42 PY - 2019 IS - 1 SP - 3 EP - 15 PG - 13 SN - 0391-9838 DO - 10.4461/GFDQ.2019.42.1 UR - https://m2.mtmt.hu/api/publication/31083312 ID - 31083312 AB - Sea level indicators, such as tidal notches and beachrocks, may provide valuable information for the relative sea level (RSL) changes of an area. The study area, Okinawa, belongs to the Ryukyu Islands, Japan (Pacific Ocean), forming the emerged part of an active island arc, where the Philippine Sea plate is subducting beneath the Asian continent. Evidence of emergence has been noted by various studies. Beachrocks have also been studied, however, detailed examinations of their spatial extent and cement characteristics has not been accomplished. The purpose of this study is to discuss the RSL evolution in Okinawa through the reevaluation of reported sea level indicators, with additional observations of beachrocks and notches and RSL predictions. Our findings suggest that the majority of Okinawa beachrocks have formed in the intertidal zone. Although the vertical uncertainty of the produced SLIPs is relatively large, there is a good agreement between the different types of sea level indicators. Comparisons with RSL predictions as well as the presence of uplifted notches further suggest that Okinawa island is generally characterized by an uplift trend, which is larger in its southern part. LA - English DB - MTMT ER - TY - JOUR AU - Móga, János AU - Kohán, Balázs AU - Csüllög, Gábor AU - Strat, Daniela AU - Kiss, Klaudia AU - Suresh, Madha TI - THE GEOMORPHOLOGICAL SURVEY OF THE PSEUDOKARST IN THE AREA OF LAMAYURU PALEOLAKE BADLANDS (MOONLAND), LADAKH REGION, INDIA JF - GEOGRAFIA FISICA E DINAMICA QUATERNARIA J2 - GEOGR FIS DIN QUAT VL - 42 PY - 2019 IS - 1 SP - 87 EP - 97 PG - 11 SN - 0391-9838 UR - https://m2.mtmt.hu/api/publication/31015992 ID - 31015992 LA - English DB - MTMT ER -