Polar Science最新文献_第4页

Evaluating and locating a suitable bedrock drilling site near zhongshan station with airborne and ground-based observations 通过航空和地面观测评估和确定中山站附近合适的基岩钻探地点

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101076

Yanjun Li , Xiangbin Cui , Gang Qiao , Lin Li , Shinan Lang

{"title":"Evaluating and locating a suitable bedrock drilling site near zhongshan station with airborne and ground-based observations","authors":"Yanjun Li , Xiangbin Cui , Gang Qiao , Lin Li , Shinan Lang","doi":"10.1016/j.polar.2024.101076","DOIUrl":"10.1016/j.polar.2024.101076","url":null,"abstract":"<div><div>Understanding the interaction between the Antarctic biogeochemical cycle<span><span> and global environmental change requires a comprehensive investigation of the ice sheet and underlying bedrock. An effective approach to investigating subglacial characteristics is through bedrock drilling, making the identification of a suitable drilling site a crucial prerequisite. In this study, data from airborne ice-penetrating radar and an Uncrewed Aerial Vehicle (UAV) </span>remote sensing were used in combination to obtain real-time and high-resolution information about the surface, ice thickness, and subglacial conditions in a local area near Zhongshan Station, and further to identify a drilling site that is both safe and optimal for the successful acquisition of bedrock samples beneath the East Antarctic Ice Sheet. By analyzing the airborne ice-penetrating radar data from the 35th Chinese National Antarctic Research Expedition (CHINARE) (2018–2019), a potential drilling site was selected based on ice thickness (≤200 m) and a dry basal condition with no channels or basal crevasses, to avoid drilling fluid leakage. UAV data confirmed stable surface topography, ice flow, and the absence of surface crevasses. The optimal site was identified as located close to the western flank of the upstream part of the Dålk Glacier. In 2019, CHINARE successfully retrieved a valuable bedrock core sample from the borehole at this location. This study provides a feasible and effective methodology for locating a bedrock drilling site by using data from airborne ice-penetrating radar and UAV remote sensing.</span></div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101076"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141059896","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

Collaboration network analysis for the Arctic issues based on a collection of international collaborative events 基于国际合作活动集的北极问题合作网络分析

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101091

Xiaoxue Ma , Qiaoling Du , Weiliang Qiao , Yang Liu

{"title":"Collaboration network analysis for the Arctic issues based on a collection of international collaborative events","authors":"Xiaoxue Ma , Qiaoling Du , Weiliang Qiao , Yang Liu","doi":"10.1016/j.polar.2024.101091","DOIUrl":"10.1016/j.polar.2024.101091","url":null,"abstract":"<div><div>In recent years, global warming has accelerated the melting of Arctic ice. The value of the Arctic has been increasing in various aspects and has received widespread attention from the international community. The significance of globalization of the Arctic issue has become more and more prominent, the member states of the Arctic Council, observer states, and non-Arctic countries that have intensively developed and updated their respective Arctic strategies have actively participated about Arctic issues. The international collaboration has gradually become an effective way of addressing Arctic issues. In order to explore the pattern behind the collaborative events about Arctic issues, with the application of complex network analysis, the international collaborative events about Arctic issues from 2013 to 2023 are selected to construct the collaborative networks. Then the collaborative networks are quantitatively analyzed by the relevant parameters of complex network. These parameters for quantitative analysis include network density, average path length, clustering coefficient, degree centrality, closeness centrality and betweenness centrality. The results of the study reveal the changes in international collaboration about Arctic issues from 2013 to 2023.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101091"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141198056","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

Application of menthol anesthetics for body size measurements of the sea angel Clione elegantissima (Mollusca: Gymnosomata) 薄荷醇类麻醉剂在测量海象（软体动物：裸鱼）体型中的应用

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101125

Tomoyasu Yamazaki , Takashi Kuwahara , Kunio T. Takahashi

{"title":"Application of menthol anesthetics for body size measurements of the sea angel Clione elegantissima (Mollusca: Gymnosomata)","authors":"Tomoyasu Yamazaki , Takashi Kuwahara , Kunio T. Takahashi","doi":"10.1016/j.polar.2024.101125","DOIUrl":"10.1016/j.polar.2024.101125","url":null,"abstract":"<div><div>Understanding body size variation has been a central goal in ecology for almost half a century. However, it is difficult to measure the size of soft-bodied invertebrates accurately, such as members of the genus <em>Clione</em>, which expand and contract their bodies. To allow for accurate body length measurements, anesthetic menthol was used to temporarily relax the bodies of <em>Clione elegantissima</em> collected from the southern Okhotsk Sea. A standard solution was prepared using 1.4 g <em>l</em>-menthol dissolved in 250 mL ethanol. Three test solutions were then prepared using 0.1, 0.25, or 0.5 mL of the standard solution and dissolved in 20 mL of filtered seawater. Using a menthol-based anesthetic, the animals extended their body parts (including foot lobes, wings, and head tentacles), remained motionless, and showed no reaction to pricking with forceps. All tested animals returned to their actual sizes within 1–15 min after placing them back in filtered seawater, indicating that the menthol-based solutions were effective and harmless. The best concentration for measuring the body size <em>C. elegantissima</em> was 0.1 mL of the standard solution. It allowed not only bodies but head tentacles to stretch, providing to the full-length of <em>Clione</em> samples for body size measurements. We suggest that this anesthetic can be used as a new standard for body measurements and morphological observations in <em>Clione</em> species.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101125"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170864","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

Thaw slump development and other rapid permafrost disturbances in Hollendardalen Valley, Svalbard 斯瓦尔巴群岛霍伦达达伦山谷的融化滑坡发展和其他快速的永久冻土扰动

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101122

Vasiliy Demidov , Sergey Verkulich , Aleksey Ekaykin , Anton Terekhov , Arina Veres , Anna Kozachek , Sebastian Wetterich , Diana Soloveva , Mikhail Varentsov , Kirill Barskov

{"title":"Thaw slump development and other rapid permafrost disturbances in Hollendardalen Valley, Svalbard","authors":"Vasiliy Demidov , Sergey Verkulich , Aleksey Ekaykin , Anton Terekhov , Arina Veres , Anna Kozachek , Sebastian Wetterich , Diana Soloveva , Mikhail Varentsov , Kirill Barskov","doi":"10.1016/j.polar.2024.101122","DOIUrl":"10.1016/j.polar.2024.101122","url":null,"abstract":"<div><div>From 2019 to 2022, for the first time in Svalbard, the rapid development of a thaw slump was observed in Hollendardalen Valley (Nordenskiöld Land, West Spitsbergen), affecting an area of 6300 m<sup>2</sup>. Fast-paced thermokarst and thermo-erosion processes exposed massive ground ice, as well as thick ground ice veins within frozen silt strata. In the riverbed – in a non-carbonate, non-karstifying geological setting – thaw funnels appeared, swallowing part of the river flow, presumably via a local fault zone connecting to deep aquifers. The exposed ground ice has extremely low mineralization, dominated by Na<sup>+</sup> and SO<sub>4</sub><sup>2−</sup> ions. The properties and morphology of the ice veins point to segregation origins. The broad middle reaches of the Hollendardalen Valley exhibit thermokarst depressions and lakes, tabular terrace remnants and traces of past thaw slumping. Such morphology represents a thermo-erosional plain, formed through the interplay of fluvial erosion and a series of fast-paced thermo-erosion and thermokarst events. The very presence of massive ground ice in places where its appearance was previously unexpected indicates the possibility of detecting further ground ice of various thicknesses in Svalbard. Thus, ongoing and future permafrost warming will likely accelerate rapid permafrost thaw in Svalbard, reshaping the surface morphology and subsurface hydrology.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101122"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169669","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

A statistical study of precipitation on the eastern antarctic plateau (Dome-C) using remote sensing and in-situ instrumentation 利用遥感和现场仪器对南极高原东部（Dome-C）降水量进行统计研究

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101106

Massimo Del Guasta , Philippe Ricaud , Claudio Scarchilli , Giuliano Dreossi

{"title":"A statistical study of precipitation on the eastern antarctic plateau (Dome-C) using remote sensing and in-situ instrumentation","authors":"Massimo Del Guasta , Philippe Ricaud , Claudio Scarchilli , Giuliano Dreossi","doi":"10.1016/j.polar.2024.101106","DOIUrl":"10.1016/j.polar.2024.101106","url":null,"abstract":"<div><div>Studying precipitation at very high latitudes is a challenge, particularly during the polar winter. Direct monitoring of ice habit and size in high latitude precipitation is crucial for validating the algorithms used to derive precipitation from radar, and for improving the climatological modeling of polar areas. The high plateau lacks long-term direct observations of precipitation. In this work, carried out at Concordia Station (Dome-C (DC), −75°S, 123°E, 3233 m a.m.s.l), the use of a depolarization LIDAR, a flatbed scanner (ICECAMERA), a microwave profiler (HAMSTRAD) and meteorological instrumentation made possible the study, over the period 2014–2021, of shape, size, height and temperature of formation of precipitation. The precipitation sources were classified into four types: ice fogs, liquid fogs, mixed-phase clouds, and cirrus. Ten representative ice habits for Dome-C were chosen. The size distribution for every habit was calculated, allowing for the estimation of the corresponding radar reflectivity. The use of W-band radars, such as CLOUDSAT, with a sensitivity of −28dB, resulted in capturing all the crystals observed in Concordia. A positive trend was observed between grain size and height in ice habits that are typical of cloud precipitation. North West (NW) and North East (NE) winds at cloud height, blowing from coastal regions, caused the majority of precipitation from clouds. The study also examined the height trend of the ice habit composition of precipitation. The ice habit composition for each of the four types of precipitation source was analyzed, and the possibility of determining the source by simply observing the precipitation was explored. This work marks the first comprehensive investigation of precipitation on the eastern Antarctic plateau.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101106"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comprehending the surface melt characteristics, calving processes, and seasonal ice velocity of Dålk glacier in Larsemann Hills, East Antarctica 从 2016 年到 2023 年了解南极洲东部拉尔斯曼丘陵 Dålk 冰川的表面融化特征和冰移动情况

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101081

Pooja Mishra , Naveen Tripathi , S.K. Singh , S.R. Oza , P.M. Solanki , N.Y. Bhatt

{"title":"Comprehending the surface melt characteristics, calving processes, and seasonal ice velocity of Dålk glacier in Larsemann Hills, East Antarctica","authors":"Pooja Mishra , Naveen Tripathi , S.K. Singh , S.R. Oza , P.M. Solanki , N.Y. Bhatt","doi":"10.1016/j.polar.2024.101081","DOIUrl":"10.1016/j.polar.2024.101081","url":null,"abstract":"<div><div>Surface melting induces hydro-fracturing and deformational changes on the ice surface, which have a substantial impact on its dynamics and stability and therefore, comprehending these processes is crucial for ice sheet mass balance and stability. The present study is an attempt to understand the surface melt characteristics, seasonal ice movement, and calving processes of the Dålk glacier located in the Larsemann Hills of East Antarctica<span> using multi-sensor remote sensing observations from 2017 to 2023. We identified and examined several melt features across the glacier and analysed their evolution during the study period. Frontal changes, calving events, and seasonal surface ice velocities of the glacier were also investigated during the study period. We found that the evolution and drainage of the melt features over the Dålk glacier is highly dynamic in nature with a significant inter-annual variability. We report substantial morphological changes in the ice doline structure that may be driven by the surface melt patterns, ice movement, and ice deformation in the region which also, affect the drainage of the nearby connected melt ponds and features. Several minor to very major calving events observed during the period due to immense disintegration processes during the preceding melting season that also affected the ice movement. We also highlight the need of monitoring and studying such melt features over the outlet glaciers that concerns the imminent catastrophic fragmentation and deformational changes over the glacier.</span></div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101081"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141026092","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

Corrigendum to “The digital beam forming technique in AgileDARN high-frequency radar”[Polar Sci, 28(2020) 100595, Special Issue on "SuperDARN/ studies of geospace dynamics - Today and future"] “AgileDARN高频雷达中的数字波束形成技术”勘误表[Polar Sci，28（2020）100595，“超级DARN/地球空间动力学研究——今天和未来”特刊]

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2022.100807

Jingye Yan , Xiang Deng , Ailan Lan , Ji Wu , Jiaojiao Zhang , Wei Wang , Hongbin Qiu

引用次数: 0

Community perspectives inform coastal marine ecosystem research in northwestern Greenland 格陵兰西北部沿海海洋生态系统研究中的社区观点

IF 1.8 4区地球科学

Polar Science Pub Date : 2024-09-04 DOI: 10.1016/j.polar.2024.101112

Mayuko Otsuki, Shin Sugiyama

{"title":"Community perspectives inform coastal marine ecosystem research in northwestern Greenland","authors":"Mayuko Otsuki, Shin Sugiyama","doi":"10.1016/j.polar.2024.101112","DOIUrl":"https://doi.org/10.1016/j.polar.2024.101112","url":null,"abstract":"The Arctic is warming faster than the rest of the world, affecting the natural environment ecosystem and society. Because human society utilizes coastal areas and relies on marine resources for living, research is needed to study human impacts on the coastal marine ecosystem as well as the influence of the changing ecosystem on society. To better understand the changing coastal environments and the impact on society, we performed multidisciplinary research in Qaanaaq, northwestern Greenland. To share and discuss our research results, we organized workshops with residents in Qaanaaq from 2016 to 2019, and in 2022 and 2023. One workshop topic of intense discussion was the summer distribution of Greenland halibut (), because of its socio-economic importance in the region. Another point of interest for the residents was the potential presence of pollution on the beach, as a result of the nearby village. Residents voiced concern about the accumulation of heavy metals in spp. (blue mussel) because residents catch mussels near the dump site. Close collaboration with residents as well as co-design and direction of the research is increasingly important for researchers to contribute to a sustainable future for populations living in the Arctic.","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"199 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249945","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

Russia lacks the financial resources to improve living standards in the Arctic: A case of the Sakha Republic 俄罗斯缺乏提高北极地区生活水平的财政资源：萨哈共和国的案例

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-09-01 DOI: 10.1016/j.polar.2024.101051

{"title":"Russia lacks the financial resources to improve living standards in the Arctic: A case of the Sakha Republic","authors":"","doi":"10.1016/j.polar.2024.101051","DOIUrl":"10.1016/j.polar.2024.101051","url":null,"abstract":"<div><p><span><span>This paper focuses on the Sakha Republic in the Russian Far East as one of the Arctic regions. Russia's Arctic policy gives priority to improving the </span>living standard<span> and quality of life of Arctic inhabitants. I examine the feasibility of Russia's Arctic policy in the context of economic and social situation in the Sakha Republic and fiscal capacity of local governments, which are responsible for the provision of social public services. The Arctic region is an important ‘donor’ for the Russian economy, which can bring abundant tax revenues to the state budget. However, it has not been considered enough if this wealth<span> contributes to the sustainable development of Arctic societies. This paper provides an overview of Russia's Arctic policy, followed by an analysis of the socio-economic situation in the Sakha Republic after the collapse of the </span></span></span>USSR<span><span>. Then, local public service provision and its </span>finance<span> is analyzed based on the fiscal statistics of the Republic. I conclude that local governments face difficulties in enhancing their public services due to a lack of financial resources and absence of decision-making autonomy, because of centralization in the past decades.</span></span></p></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"41 ","pages":"Article 101051"},"PeriodicalIF":1.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139555118","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 changes in iodine-129 and radiocesium in the Canada Basin in the Arctic Ocean between 1993 and 2020 1993-2020 年间北冰洋加拿大海盆中碘-129 和放射性铯的时间变化

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-09-01 DOI: 10.1016/j.polar.2024.101071

{"title":"Temporal changes in iodine-129 and radiocesium in the Canada Basin in the Arctic Ocean between 1993 and 2020","authors":"","doi":"10.1016/j.polar.2024.101071","DOIUrl":"10.1016/j.polar.2024.101071","url":null,"abstract":"<div><p>The Arctic Ocean plays an important role in global climate and global warming through freshwater and heat exchange with subarctic waters. A better understanding of circulation time scales in the Arctic Ocean is essential to predict changes in climate and biogeochemical cycling in the Arctic Ocean. <sup>129</sup>I and <sup>137</sup>Cs, which have been discharged from the nuclear fuel-reprocessing facilities, have been employed to determine the time scale of the circulation in the Arctic Ocean. However, its temporal change has not been understood well. In 2017, 2019, and 2020, we measured <sup>129</sup>I and <sup>137</sup>Cs in the Canada Basin in the Arctic Ocean. Using our new and historical data, we discuss temporal changes in the circulation in the basin between 1993 and 2020. The tracer ages derived from the <sup>129</sup>I/<sup>137</sup>Cs ratio indicate that the transport of the Atlantic water into the Canada Basin was accelerated in 2020. This is consistent with results of recent studies that indicated the intensified inflow of the Atlantic water into the eastern Arctic Ocean in the late 2010s, which is termed “atlantification”. Our results confirmed the “atlantification” in the Canada Basin by temporal changes in the transient tracers for the first time.</p></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"41 ","pages":"Article 101071"},"PeriodicalIF":1.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1873965224000409/pdfft?md5=8643431f6cdeb965a42b67b83c174cbf&pid=1-s2.0-S1873965224000409-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140399863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0