Oceanologia最新文献

{"title":"The significance of sea-level change and ancient submerged landscapes in human dispersal and development: A geoarchaeological perspective","authors":"Geoff Bailey ,&nbsp;Hayley C. Cawthra","doi":"10.1016/j.oceano.2021.10.002","DOIUrl":"10.1016/j.oceano.2021.10.002","url":null,"abstract":"<div><p>In this paper we highlight the impact of sea-level change on the archaeological record of key developments in human history that took place during the late Pleistocene and the early Holocene. Before modern sea level became established from ∼7 ka onwards, most palaeoshorelines and large areas of coastal hinterland were exposed as habitable land and then drowned again by sea-level rise. We summarise the archaeological implications of this pattern and the conditions in which archaeological and geoarchaeological evidence from these submerged landscapes is preserved despite the potentially destructive erosional impact of sea-level rise. We provide examples of palaeolandscape reconstruction made possible through multi-disciplinary collaboration between archaeology and marine science, drawing on recent underwater research in the North Sea, the Red Sea and on the Cape Coast of South Africa, and discuss evidence of past human responses to sea-level change. We identify the types of modelling procedures that need to be developed to advance this field of research, emphasise the importance of inter-disciplinary collaboration involving two-way exchange of ideas and information between archaeology and marine science, and highlight the value of a long-term perspective in understanding the present and future human impact of sea-level rise.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"65 1","pages":"Pages 50-70"},"PeriodicalIF":2.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44126337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perceptions of an endangered Baltic Sea","authors":"Hans von Storch","doi":"10.1016/j.oceano.2021.08.005","DOIUrl":"10.1016/j.oceano.2021.08.005","url":null,"abstract":"<div><p>In a series of ad-hoc surveys at different academic institutions in the Baltic Sea region, students and young scholars were asked about their views about the environmental issues of the Baltic Sea, and who would be responsible for the management of the Baltic Sea. Overfishing, climate change and waste were considered the most significant issues, while tourism and constructions (of bridges, etc.) were less often recognized as severe. The responsibility for the management of the Baltic Sea was mostly attributed to the European Union or to the respective national governments.</p><p>Since climate is one of these issues, one question has dealt with the main task of climate science. It turns out that the most frequent assertion was not the genuine scientific task of generating knowledge about the dynamics of the system. Instead, the task of solving the problem and, equally often, supporting climate activism was favored.</p><p>The results are not representative – neither for the separate surveys, nor for the selection of the sites of surveying. However, when taken all surveys together, the emergence of consistent perceptions may be considered evidence for a general attitude among students and young scholars in the Baltic regions. However, differences between groups – in terms of nationality, seniority and discipline - may be related to sampling randomness.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"65 1","pages":"Pages 44-49"},"PeriodicalIF":2.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.oceano.2021.08.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45123247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intermediate plumes of low oxygen in the southeastern Baltic Sea","authors":"Maria Golenko,&nbsp;Vadim Paka,&nbsp;Victor Zhurbas,&nbsp;Andrey Korzh,&nbsp;Alexey Kondrashov","doi":"10.1016/j.oceano.2021.12.003","DOIUrl":"10.1016/j.oceano.2021.12.003","url":null,"abstract":"<div><p>Closely spaced CTDO profiling on the pathway of saltwater flow in the southeastern Baltic Sea in August and December 2019 revealed low oxygen intermediate layers-plumes with dissolved oxygen concentration (<em>DOC</em>) less than 2 mg/l under the upper boundary of permanent halocline. At the same time, <em>DOC</em> in the underlying layers was higher and reached 5.0–5.3 mg/l. In order to test the hypotheses about the origin of the intermediate hypoxic plumes, numerical hydrodynamic modelling was performed for time intervals including the measurement periods. The model was validated against bottom current velocity instrumental measurements by a TCM (Tilt Current Meter) moored on the track of the CTDO profiling. Numerical experiments with Lagrangian particles of neutral buoyancy coupled with the operational circulation model showed that sub-halocline hypoxic intermediate layers in the southern part of the Eastern Gotland Basin and in the Gdańsk Basin could be formed as a result of intrusion into the underlying bottom layer of denser, moderately oxygenated water from the Słupsk Furrow, which replaced the old anoxic and hypoxic water of Gotland and Gdańsk origin. It is assumed that cyclonic eddy activity above the saltwater flow along sloping bottom caused fragmentation of the hypoxic intermediate layer into separate plumes. The hypoxic intermediate layers in the Słupsk Furrow, in accordance with the results of monitoring measurements and modelling the motion of particles of neutral buoyancy, could be formed in the Bornholm Basin and moved eastward over the Słupsk Sill.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"65 1","pages":"Pages 100-116"},"PeriodicalIF":2.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41976822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photosynthetic signatures of microbial colonies covering submerged hard surfaces as novel trophic status indicators: Baltic Sea studies","authors":"Katarzyna Boniewicz-Szmyt ,&nbsp;Maciej Grzegorczyk ,&nbsp;Stanisław J. Pogorzelski ,&nbsp;Paweł Rochowski","doi":"10.1016/j.oceano.2022.04.004","DOIUrl":"10.1016/j.oceano.2022.04.004","url":null,"abstract":"<div><p>The study aimed to determine photosynthetic signatures, i.e. photosynthetic energy storage (ES) efficiency and photoacoustic spectra of pigment-containing biofilm communities attached to submerged solid substrates in relation to the temporal variability of the trophic state of natural water. Biofouling phenomenon signatures on artificial solid surfaces, deployed in the shallow Baltic Sea waters (Gulf of Gdańsk, Poland) for a specific period of time, were determined over a three-year period using improved photoacoustic spectroscopy apparatus based on closed cell geometry. Selected chemical parameters (oxygen, nitrogen and phosphorus concentrations) and biological productivity (primary production and Chlorophyll <em>a</em>; hereinafter abbreviated as Chl <em>a</em>) of the water body were obtained from the SatBałtyk System platform (<span>http://satbaltyk.iopan.gda.pl</span><svg><path></path></svg>) and used as comprehensive data. As a result, close cross-correlations between photosynthetic energy storage and PAS amplitude spectra and the seawater chemical parameters were demonstrated. As found, ES was negatively correlated with concentrations of biogenic elements (correlation coefficient R given in brackets): O (–0.67), P (–0.81), N (–0.76), and positively correlated with concentrations of Chl <em>a</em> (0.82) and primary production (0.39). As periphyton is believed to respond dynamically to water quality and environmental stresses, its photosynthetic system features can be used as novel, modern and robust indicators in marine bioassessment, in addition to traditional trophic state indices based on chemical analysis.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"65 1","pages":"Pages 194-201"},"PeriodicalIF":2.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43709957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nearshore sandbar switching episodes and their relationship with coastal erosion at the Curonian Spit, Baltic Sea","authors":"Rasa Janušaitė ,&nbsp;Darius Jarmalavičius ,&nbsp;Donatas Pupienis ,&nbsp;Gintautas Žilinskas ,&nbsp;Laurynas Jukna","doi":"10.1016/j.oceano.2021.11.004","DOIUrl":"https://doi.org/10.1016/j.oceano.2021.11.004","url":null,"abstract":"<div><p>The longshore realignment of nearshore sandbars is a morphodynamic phenomenon of multiple sandbar systems that has been known about for several decades. However, it is unknown how switching-related nearshore changes influence the evolution of subaerial beaches. This study aims to define the relationship between sandbar switching episodes and the dynamic state of the beach-foredune system along the Curonian Spit coast (Baltic Sea) using decadal satellite-derived and beach profiling data. To define this connection, sandbar switching locations, sandbar cross-shore positions, shoreline positions, and sand volume changes in the beach-foredune system were assessed on interannual and storm-related time scales. Twenty-seven sandbar switching episodes were observed with an average duration of 14.3 months. Most of the switching episodes occurred at preferred locations, coinciding with breaking points of different shoreline orientations where oblique waves and longshore currents prevailed. Shoreline retreat at an average rate of –14.2 m was observed within most of the sandbar switching zones. During major storm events, the average rate of erosion within the sandbar switching zones was significantly higher than the rate outside them. On an interannual time scale, a moderate average rate of erosion was observed within the sandbar switching zones compared to a small accretion rate outside them. Additional case studies of coastal evolution within the switching zones indicated well-correlated rates of switching-determined outer sandbar positions, shoreline positions, and sand volume on the beach and foredune during the switching episodes. The results of this study could be important for the identification of erosional hot spots and coastal prediction.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"65 1","pages":"Pages 71-85"},"PeriodicalIF":2.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49744948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Natural and synthetic estrogenic compounds in the Pearl River Estuary and northern shelf of the South China Sea","authors":"Carina Deich ,&nbsp;Marion Kanwischer ,&nbsp;Ruifeng Zhang ,&nbsp;Joanna J. Waniek","doi":"10.1016/j.oceano.2021.08.001","DOIUrl":"10.1016/j.oceano.2021.08.001","url":null,"abstract":"<div><p>Endocrine disrupting compounds and in particular estrogenic substances have the ability to interact with the hormone system of organisms. Among them are not only synthetic but also natural substances that potentially stress the aquatic ecosystem. High human population densities such as around the Pearl River Estuary (PRE) are suspected of exerting significant anthropogenic pressure onto coastal areas. In this study, natural and synthetic estrogens as well as estrogen-like substances derived from plants and fungi were investigated in the PRE and at the adjacent northern shelf of the South China Sea. Maximum concentration of 3.6 ng L⁻¹ for estrone (E1), 0.7 ng L⁻¹ for 17α-ethinylestradiol (EE2), 12.9 ng L⁻¹ for genistein (GEN), 11.9 ng L⁻¹ for daidzein (DAI) and 1.9 ng L⁻¹ for zearalenone (ZEN) were observed. While E1 and EE2 were detected in fresh and saltwater samples, GEN, DAI and ZEN were observed only at freshwater sampling sites. During the investigations, the analysis of 17β-estradiol (E2) and EE2 indicated a strong matrix dependence. Additionally, an estrogen screen observation showed estrogenic activity in form of estradiol equivalent quotients up to 0.18 ng L⁻¹.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"65 1","pages":"Pages 30-43"},"PeriodicalIF":2.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.oceano.2021.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43850167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors responsible for the sudden outburst of Noctiluca scintillans in the Chennai coastal waters, southeast coast of India – a case study","authors":"Pravakar Mishra,&nbsp;Mehmuna Begum,&nbsp;Anitha Gera,&nbsp;B. Charan Kumar,&nbsp;Garlapati Deviram,&nbsp;Uma Kanta Pradhan,&nbsp;Athan Vashi,&nbsp;Debasmita Bandyopadhyay,&nbsp;Subrat Naik,&nbsp;Uma Sankar Panda,&nbsp;M.V. Ramana Murthy","doi":"10.1016/j.oceano.2022.06.005","DOIUrl":"10.1016/j.oceano.2022.06.005","url":null,"abstract":"<div><p>The paper discusses the factors associated with the sudden outbreak of the nocturnal heterotrophic bioluminescent dinoflagellate <em>Noctiluca scintillans</em> along the Chennai coast. The bloom occurred along a stretch of 16 km following a spell of heavy rain in August 2019. The density of <em>N. scintillans</em> varied from 1000 to 19000 cells/L, with a distinguished distribution pattern. High <em>N. scintillans</em> abundance was recorded at Panaiyurkuppam and Kovalam, with 19000 cells/L and 18000 cells/L, recorded respectively. Adequate nutrients brought by substantial rainfall and a high abundance of the diatom <em>Thalassiosira</em> sp. triggered the <em>N. scintillans</em> bloom. The low wind speed (5 m/sec), lowering of atmospheric temperature (from 24.00 to 31.00°C, 27.5 ± 1.17°C), high rainfall (6 mm within one day), and low sea surface temperature (SST) (from 25.20 to 31.00°C, 29.37± 1.17°C) are probable environmental cues. Local hydrodynamics and the diverging currents governed the presence and dispersion of the bloom in the region.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"64 4","pages":"Pages 781-788"},"PeriodicalIF":2.9,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0078323422000744/pdfft?md5=1b646242550a9c7d019458733c08316f&pid=1-s2.0-S0078323422000744-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44922898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of absorption properties of CDOM and its composition in Likas estuary, North Borneo, Malaysia","authors":"Saiyidah Munirah Mohd-Shazali ,&nbsp;Jafar-Sidik Madihah ,&nbsp;Nurzaliah Ali ,&nbsp;Chen Cheng-Ann ,&nbsp;Robert J.W. Brewin ,&nbsp;Md. Suffian Idris ,&nbsp;P. Purba Noir","doi":"10.1016/j.oceano.2022.04.005","DOIUrl":"10.1016/j.oceano.2022.04.005","url":null,"abstract":"<div><p>Chromophoric Dissolved Organic Matter (CDOM) is a vital water constituent in aquatic ecosystems that contributes to water colour, affects light penetration, and impacts primary production. This study aims to determine the spatial and monsoonal variability of CDOM absorption properties in the Likas estuary, characterise the source of CDOM, and investigate the correlations between CDOM absorption properties and salinity. Likas estuary is a small estuary located in Kota Kinabalu city on the west coast of Sabah, facing the South China Sea. A mangrove ecosystem surrounds it with manufactured structures such as residential areas and public facilities. Surface water samples were collected at 19 stations: upstream of rivers to the river mouth and coastal area during spring tides every month, from June 2018 to July 2019, for 14-months. The distribution of a_CDOM(440) in the study area is predictable as a signature in a coastal area with a decreasing gradient from the upstream towards coastal water (0.29 ± 0.19 m⁻¹ to 1.05 ± 0.39 m⁻¹). There are increasing spatial patterns of spectral slopes S_275-295 and S_R. However, S_350-400 and S_300-600 declined spatial gradients from the upstream to coastal water. Thus, S_300-600 indicates a linear relationship between a_CDOM(440), which unconventional results in coastal water. We suspect this is due to a small coverage of the study site with a distance of 0.5 m intervals of each station. This could be why the S_300-600 had constant values throughout the study area (with no statistical difference between stations). In addition, S_300-600 was merely varied in the stations located at the river mouth and coastal water. Based on the spectral slope ratio (S_R), most of the stations located in the Darau, Inanam, and Bangka-Bangka rivers had S_R values less than 1. Hence, CDOM in these stations is a terrestrial-dominated source. Therefore, from our observations during the study period, monsoonal variation could alter the source of CDOM in the study area.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"64 4","pages":"Pages 583-594"},"PeriodicalIF":2.9,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0078323422000549/pdfft?md5=21d82e330dd7e823d7cf3e8cb6129292&pid=1-s2.0-S0078323422000549-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47049201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Sea spray volume flux estimation using joint statistics of wind and waves” [Oceanologia 64 (2022) 789–793]","authors":"D. Myrhaug, B. Leira, G. Radhakrishnan, Ha˚vard Holm","doi":"10.1016/j.oceano.2022.10.001","DOIUrl":"https://doi.org/10.1016/j.oceano.2022.10.001","url":null,"abstract":"","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47426083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sea spray volume flux estimation using joint statistics of wind and waves","authors":"Dag Myrhaug,&nbsp;Bernt J. Leira,&nbsp;Gowtham Radhakrishnan,&nbsp;Håvard Holm","doi":"10.1016/j.oceano.2022.07.005","DOIUrl":"10.1016/j.oceano.2022.07.005","url":null,"abstract":"<div><p>This article provides estimates of the sea spray volume flux using joint statistics of wind and waves. This is achieved by combining the sea spray volume flux parameterization proposed by <span>Xu et al. (2021)</span> with the joint statistics of wind and waves provided by <span>Bitner-Gregersen (2015)</span>. Both the sea spray volume flux formula and the joint statistics of wind and waves represent conditions for wind waves from the North-West Shelf of Western Australia. The expected value and the variance of the sea spray volume flux for a range of realistic wind and wave conditions are presented, as well as an illustrative example. Comparison is also made with data from <span>Xu et al. (2021)</span> showing a reasonable agreement for the relevant subset of the data.</p></div>","PeriodicalId":54694,"journal":{"name":"Oceanologia","volume":"64 4","pages":"Pages 789-793"},"PeriodicalIF":2.9,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0078323422000811/pdfft?md5=55cdbd786d76e5487acbd1cb3745ec42&pid=1-s2.0-S0078323422000811-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42818413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}