Eighteen sediment samples from a 36 cm long sediment core retrieved from a proglacial lake (namely P 11) situated in the Schirmacher Oasis, East Antarctica, were analysed for the study of quartz grain morphology and microtexture, along with sand percentage, to reconstruct the paleoenvironmental changes in the lake during the Holocene. The age of the core ranges from 3.3 ka BP to 13.9 ka BP. The quartz grain morphology and microtexture reveal significant evidences of glacial transport along with some eolian and aqueous activities. On the basis of predominance of these signatures and the zonation from CONISS Cluster Analysis on the percentages of characteristic grain morphology and microtextures, the entire core has been subdivided into three major zones. From the paleoenvironmental perspective, it can be concluded that there is an onset of interglacial period at the advent of Holocene (12.3 ka BP), which reigned until 5.3 ka BP and thereafter, again a glacial environment prevailed until 3.3 ka BP with some variations in-between. The results indicate probable alternative colder and less colder phases in the study area, which are also well supported by the respective sand percentages in the sediments. © 2017 Polish Academy of Sciences 2017.

The present article is a short and very preliminary report about the Hellenistic coins found during excavations conducted by the team of the Institute of Archaeology, Jagiellonian University at the agora of the ancient Nea Paphos in 2011–2019. The first archaeological research at the agora had been conducted in the late 1960s and 1970s by Kyriakos Nicolaou. The Jagiellonian University team, led by Ewdoksia Papuci-Władyka started to explore the agora area in 2011. There were at least 480 coins and coin flans found during the Polish excavations. Great part of them are minted in the Hellenistic Period. The group consists mainly of Ptolemaic coins (over 67%), but includes also Cypriot bronzes of the Zeus/Zeus type (20.5%), coins of Syro-Palestinian region (Seleucid, Hasmonean rulers – over 6%), Macedonian-Antigonid issues (3.8%), the coins from south-eastern Aegean and Asia Minor (1.6%) as well as others. Some preliminary observations concerning chronology and structure of the finds are presented.

The paper presents the potential of combining satellite radar data and neural networks for quasi-automatic detection of glacier grounding lines. The conducted research covered five years and was carried out in the area of the Amery Ice Shelf. It has a very complex shoreline, so its grounding-line location is uncertain. Thus, it has always been the subject of much research. The main objective of our work was to find out if Synthetic Aperture Radar data combined with a deep learning implementation would enable rapid detection of ice shelf grounding lines over large areas. For this purpose, 290 radar images from the Sentinel-1 satellite covering 46 000 km2 were used. Processed by the Differential Interferometry of Synthetic Aperture Radar four-pass method, the images formed a time-consistent series between 2017 and 2021. As a result of performed calculations, a total length of 1280 km of grounding line was determined. They were validated by comparing with other independent data sources based on manual measurements. It has been demonstrated that the combination of satellite radar data and automated data processing allows for obtaining high-precision results continuously in a very short time. Such an approach allows monitoring of grounding line position in the long term with intervals of less than one week. It enables analysis of the dynamics changes with unprecedented frequency and the identification of patterns.