Baltica最新文献_第5页

South Baltic rip currents detected by a field survey 实地调查发现的南波罗的海离岸流

IF 0.7 4区地球科学

Baltica Pub Date : 2020-08-01 DOI: 10.5200/BALTICA.2020.1.2

R. Ostrowski, Jan Schönhofer, M. Stella, A. Grave, A. Babakov, B. Chubarenko

{"title":"South Baltic rip currents detected by a field survey","authors":"R. Ostrowski, Jan Schönhofer, M. Stella, A. Grave, A. Babakov, B. Chubarenko","doi":"10.5200/BALTICA.2020.1.2","DOIUrl":"https://doi.org/10.5200/BALTICA.2020.1.2","url":null,"abstract":"The paper presents results of experimental investigations of currents in the nearshore region of the south Baltic Sea. The analysis is based on the field data collected near Lubiatowo (Poland) using the measuring equipment which was simultaneously operated both by the Polish and Russian research teams. The venture was aimed at detection of rip currents that are rare and insufficiently explored phenomena in the south Baltic coastal zone. The data include wind velocity and direction, deep-water wave buoy records and currents surveyed by means of drifters. The measurements were carried out in the area whose hydrodynamics, lithodynamics and morphodynamics are typical of the south Baltic sandy coast. It appears that the nearshore water flows are mostly represented by longshore wave-driven currents with mean velocities of 0.22–0.53 m/s, and the maximum velocity of 1.32 m/s. Water circulation patterns resembling rip currents with velocities of up to 0.34 m/s were identified only on one day, when specific wave conditions occurred at the study site. Contrary to strong longshore currents generated by storm waves, rip currents occur under mild or moderate wave conditions, when many beach users are willing to swim in nearshore waters. The present findings can therefore be useful for the improvement of swimmers’ safety in the south Baltic Sea regions.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":"33 1","pages":"11-20"},"PeriodicalIF":0.7,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41878666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hydrogeological assumptions for stormwater management in Tallinn 塔林雨水管理的水文地质假设

IF 0.7 4区地球科学

Baltica Pub Date : 2020-08-01 DOI: 10.5200/BALTICA.2020.1.7

R. Perens, A. Käärd, A. Raukas

引用次数: 0

Morphological and geochemical record of historical erosion on the example of small alluvial and deluvial fans accumulated on the Bug River terraces in the Neple area (Podlasie Lowland, eastern Poland) 波兰东部波德拉西低地Neple地区布格河阶地小冲积扇和洪积扇历史侵蚀的形态和地球化学记录

IF 0.7 4区地球科学

Baltica Pub Date : 2020-08-01 DOI: 10.5200/BALTICA.2020.1.1

P. Szwarczewski, Anna Rogóż‐Matyszczak, Łukasz Zbucki

引用次数: 3

Seasonal variability in the supply of dissolved matter to catchments of basins without outlets in northern Poland, measured by selected physiochemical indicators 通过选定的物理化学指标测量的波兰北部无出口盆地集水区溶解物供应的季节变化

IF 0.7 4区地球科学

Baltica Pub Date : 2020-08-01 DOI: 10.5200/BALTICA.2020.1.3

R. Cieśliński, M. Major, Ł. Pietruszyński

{"title":"Seasonal variability in the supply of dissolved matter to catchments of basins without outlets in northern Poland, measured by selected physiochemical indicators","authors":"R. Cieśliński, M. Major, Ł. Pietruszyński","doi":"10.5200/BALTICA.2020.1.3","DOIUrl":"https://doi.org/10.5200/BALTICA.2020.1.3","url":null,"abstract":"The aim of the study is to determine the seasonal variability in the size of dissolved matter supplied to selected kettle ponds located in the glacial areas of northern Poland, using selected physicochemical indicators. The study area consisted of the drainage basin of the Parsęta River and a small catchment of the Borucinka River that flows across the Kaszubskie Lake District in northern Poland. Measurements of pH, electrolytic conductivity, oxygenation, and water temperature were performed in the field. The concentration of Ca2+, Mg2+, Na+, K+, HCO3-, SO42-, Cl-, NH4+, NO3-, PO43- was measured in the laboratory. Also, the atmospheric precipitation was determined using automatic precipitation stations. Climate conditions served as the primary determinants of seasonal change in the supply of dissolved matter to basins without outlets in the drainage basin. This is especially true of atmospheric precipitation and the effects of vegetation in the contact zone between precipitation and the biosphere. In the case of biogenic substances, one of the main factors was the length of the vegetation season. The main determinant of the hydrochemical state of kettle ponds was land use.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":"33 1","pages":"21-34"},"PeriodicalIF":0.7,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42607267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temporal and spatial variability of the suspended particulate matter in the Gdansk Deep and Eastern Gotland Basin 格但斯克深部和哥特兰盆地东部悬浮颗粒物的时空变化

IF 0.7 4区地球科学

Baltica Pub Date : 2020-08-01 DOI: 10.5200/BALTICA.2020.1.4

V. Sivkov, E. Bubnova

{"title":"Temporal and spatial variability of the suspended particulate matter in the Gdansk Deep and Eastern Gotland Basin","authors":"V. Sivkov, E. Bubnova","doi":"10.5200/BALTICA.2020.1.4","DOIUrl":"https://doi.org/10.5200/BALTICA.2020.1.4","url":null,"abstract":"The work was carried out in the south-eastern part of the Baltic Sea on the meridional section along the Russian–Polish border during 2015–2018 using the CTD-sounding. The suspended particulate matter samples were taken with the use of ultrafiltration of sea water (0.4 micron filters). The research was focused on identifying the temporal and spatial variability of suspended particulate matter distribution after a series of inflows of the North Sea waters in 2014–2016. The vertical structure of the suspended particulate matter distribution in the south-eastern Baltic, both on a seasonal and interannual scale, contains the main features common for all marine basins, namely increased concentrations of SPM at the sea surface and bottom and an intermediate layer of minimum concentrations located at a depth of 50–70 m. Seasonal fluctuations in the SPM concentration are very significant and are mainly due to the seasonal variation of bioproduction in the surface layer of the sea and the flow of rivers. The confirmation of the barrier role of density boundaries (thermocline and halocline) in sedimentation and geochemical processes has not been obtained.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49378683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adding another piece to NE European Aeolian Sand Belt puzzles: a sedimentary age case study of Pērtupe site, eastern Latvia 为欧洲东北部风成沙带之谜增加了另一块:拉脱维亚东部Pērtupe遗址的沉积时代案例研究

IF 0.7 4区地球科学

Baltica Pub Date : 2020-08-01 DOI: 10.5200/BALTICA.2020.1.5

E. Kalińska, R. Kot, M. Krievāns

{"title":"Adding another piece to NE European Aeolian Sand Belt puzzles: a sedimentary age case study of Pērtupe site, eastern Latvia","authors":"E. Kalińska, R. Kot, M. Krievāns","doi":"10.5200/BALTICA.2020.1.5","DOIUrl":"https://doi.org/10.5200/BALTICA.2020.1.5","url":null,"abstract":"The NE European Sand Belt spreads over three Baltic States and consists of dunefields usually lying directly atop former glacial lakes. Some of these dunefields have so far been investigated in terms of their sediment properties and chronology. Nevertheless, there is a limited number of profiles where both glaciolacustrine and aeolian sediments co-occur and thus provide a unique environmental record where wet and dry conditions alternate. In this study, we investigated the Pērtupe profile, eastern Latvia, that represents sediment transition from glaciolacustrine silt to aeolian sand and along with a few known profiles helps to distinguish three sediment units as glaciolacustrine, transitional, and aeolian. This is most likely typical of the sediments of the NE European Sand Belt. A microstudy of sediments revealed that both aeolian and periglacial conditions alternated. However, this seems to be better expressed through prevalence of weathered quartz grains with some fracturing in the transitional unit. Aeolian deposition did take place in drier conditions, but micaceous interlayers argue for occasional watertable-controlled events.\u0000\u0000This study provides one more support regarding a start of aeolian deposition at ca. 11.3 ka in the NE European Sand Belt, which took place instantly after deglaciation rather than after a few-thousand-year hiatus. Enhanced aeolian activity is known from the region at a similar time frame, but mostly as its maximum or termination, meaning that aeolian activity must had been asynchronous.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":"33 1","pages":"46-57"},"PeriodicalIF":0.7,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45835092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Till macro- and microfabrics of mega-scale glacial lineations of Mūša–Nemunėlis Lowland, north Lithuania 立陶宛北部Mūša-Nemunėlis低地超大尺度冰川线的宏观和微观结构

IF 0.7 4区地球科学

Baltica Pub Date : 2020-08-01 DOI: 10.5200/BALTICA.2020.1.8

V. Baltrūnas, B. Karmaza, Valentas Katinas, Violeta Pukelytė, Danguolė Karmazienė, Saulius Lozovskis

{"title":"Till macro- and microfabrics of mega-scale glacial lineations of Mūša–Nemunėlis Lowland, north Lithuania","authors":"V. Baltrūnas, B. Karmaza, Valentas Katinas, Violeta Pukelytė, Danguolė Karmazienė, Saulius Lozovskis","doi":"10.5200/BALTICA.2020.1.8","DOIUrl":"https://doi.org/10.5200/BALTICA.2020.1.8","url":null,"abstract":"North Lithuania was chosen for a study of the “drumlinised” morainic surface produced during the Last Glaciation, typified as well-expressed mega-scale glacial lineations (MGSLs). The goal pursued in the present study was to investigate the morphology and macro- and microfabrics of some large glacial lineations to substantiate their formation mechanism. The geological structure of Quaternary strata of an area and the erosion depression of sub-Quaternary surface suggest favourable conditions for the glacier to rapidly fluctuate into the area during deglaciation of Late Glaciation. Investigations of Pleistocene tills observed in the MSGLs of the area preserved on the eastern and western margins of the study area show that these deposits are formed from the upper part of the Baltija Subformation – Middle Lithuanian till. According to two sets of grain sizes, MSGL tills are often notable for increased values of relative entropy. Therefore, morainic material deposited during the redeposition of the Baltija Subformation till was thoroughly mixed. The data on orientation and inclination of long axes of gravel and pebbles in the tills that form MSGLs, as well as the anisotropy of magnetic susceptibility (AMS) of microclast material suggest that the formation of MSGLs may have been influenced by directions of the local glacial stress that are different from the regional direction of glacial motion (about N–S). The change of macro- and microfabric of till confirms the formation of MSGLs during glacier erosion by groove-ploughing from the Baltija Subformation till. This occurred when basal ice carried over clast material to MSGL crests from interridge areas.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":"33 1","pages":"85-96"},"PeriodicalIF":0.7,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48712501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmental factors affecting recent benthic foraminiferal distribution in the south-eastern Baltic Sea 影响波罗的海东南部近期底栖有孔虫分布的环境因素

IF 0.7 4区地球科学

Baltica Pub Date : 2020-08-01 DOI: 10.5200/BALTICA.2020.1.6

E. Ponomarenko, V. Krechik, E. Dorokhova

{"title":"Environmental factors affecting recent benthic foraminiferal distribution in the south-eastern Baltic Sea","authors":"E. Ponomarenko, V. Krechik, E. Dorokhova","doi":"10.5200/BALTICA.2020.1.6","DOIUrl":"https://doi.org/10.5200/BALTICA.2020.1.6","url":null,"abstract":"The Baltic Sea is characterized by a restricted exchange of deep waters due to permanent stratification of the water column. The aim of the present study is to investigate the distribution of benthic foraminifera in the south-eastern part of the Baltic Sea in relation to environmental parameters. The distribution of benthic foraminifera was analyzed in 26 surface sediment samples collected in the south-eastern part of the Baltic Sea and in the Bornholm Basin during springtime and wintertime 2016. Foraminiferal diversity in the studied region was extremely low. Agglutinated specimens dominated the assemblages and were represented by small-sized individuals which belong to Psammosphaera, Pseudothurammina, Saccammina, and Reophax genera. Calcareous foraminifera were dominated by Cribroelphidium genus. Micropaleontological data were compared to the environmental parameters characterizing bottom water (temperature, salinity, and dissolved oxygen content) and substrate conditions (grain size composition and total organic carbon content). Higher foraminiferal concentrations and diversity were found in deeper parts of the study region where fine-grained sediments with a higher total organic carbon content were accumulated under stable hydrographical conditions. Calcareous tests were found only at the stations with elevated salinity, indicating that bottom water salinity is the main factor limiting the distribution of calcareous foraminifera. On the other hand, substrate parameters and hydrodynamic conditions appear to play a major role in the distribution of agglutinated foraminifera.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":"33 1","pages":"58-70"},"PeriodicalIF":0.7,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47712151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Disturbances in the primary stratigraphy of lake sediments on the Murmansk coast (Russia): their identification and relationship with catastrophic events 摩尔曼斯克海岸（俄罗斯）湖泊沉积物初级地层的扰动：它们的识别及其与灾难事件的关系

IF 0.7 4区地球科学

Baltica Pub Date : 2019-12-16 DOI: 10.5200/baltica.2019.2.3

S. Nikolaeva, D. Tolstobrov, Alena Tolstobrova

引用次数: 5

A new approach to local climate identification in the Baltic Sea’s coastal area 波罗的海沿岸地区当地气候识别的新方法

IF 0.7 4区地球科学

Baltica Pub Date : 2019-12-16 DOI: 10.5200/baltica.2019.2.8

Remigijus Dailidė, R. Povilanskas, J. A. Méndez Pérez, Greta Simanavičiūtė

{"title":"A new approach to local climate identification in the Baltic Sea’s coastal area","authors":"Remigijus Dailidė, R. Povilanskas, J. A. Méndez Pérez, Greta Simanavičiūtė","doi":"10.5200/baltica.2019.2.8","DOIUrl":"https://doi.org/10.5200/baltica.2019.2.8","url":null,"abstract":"One of the main tasks of this work is to investigate a different and new approach to coastal climate identification in the Baltic Sea’s coastal areas. A different approach of spatial correlation between solar net shortwave radiation flux and air temperature data helps to distinguish and derive areas which receive the same amount of energy but have a different average air temperature than the surrounding territories. Most of the successful climate classifications consist of three climatic variables (temperature, precipitation and temperature range). This work establishes that bivariate correlation maps of solar net shortwave radiation flux and air temperature can also be successfully used to identify local coastal climate around the Baltic Sea. The data used is the WorldClim global climate dataset and NOAH025_2.0 model output. Model data is used for calculating the correlation maps and is later compared to long-term air temperature range maps of the Baltic Sea’s coastal area. The study shows that in combination with standard classification methods, the research results can later be applied for classification of local coastal climates. Thus, the method proposed opens new potential to study coastal climate with a higher degree of accuracy. However, further studies are required to characterize the behaviour of this method for other than temperate climates.","PeriodicalId":55401,"journal":{"name":"Baltica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48145817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4