Polar Science最新文献_第4页

Estimation of annual and seasonal glaciological-based mass balance of Ladakh range in cold-arid Himalayan region – Case studies of Phuche and Khardung glaciers in 2014–2017 喜马拉雅寒冷干旱地区拉达克山脉年度和季节性冰川学物质平衡估算——以2014-2017年普彻和卡东冰川为例

IF 1.5 4区地球科学

Polar Science Pub Date : 2025-03-01 DOI: 10.1016/j.polar.2024.101132

Jaydeo K. Dharpure , Ajanta Goswami , Akansha Patel , Sanjay K. Jain , Anil V. Kulkarni

{"title":"Estimation of annual and seasonal glaciological-based mass balance of Ladakh range in cold-arid Himalayan region – Case studies of Phuche and Khardung glaciers in 2014–2017","authors":"Jaydeo K. Dharpure , Ajanta Goswami , Akansha Patel , Sanjay K. Jain , Anil V. Kulkarni","doi":"10.1016/j.polar.2024.101132","DOIUrl":"10.1016/j.polar.2024.101132","url":null,"abstract":"<div><div>The continuous estimation of glacier surface mass balance (MB) in the cold-arid trans-Himalayan region is crucial for understanding glacier-atmospheric interactions and managing future water resources. Therefore, it is essential to investigate glacier mass variability and its sensitivity to climate drivers. This study uses the direct glaciological surface MB measurements for the Phuche and Khardung glaciers from 2014 to 2017. The mean annual surface MB was observed to be −0.17 for the Phuche glacier and −0.63 m w.e. for the Khardung glacier. The maximum mass loss occurred in 2015/16 for both glaciers. The Phuche glacier experienced positive surface MB in 2014/15 and 2016/17, while the Khardung glacier exhibited negative surface MB throughout the study period. No equilibrium line altitude (ELA) or accumulation area ratio (AAR) was observed either glacier in 2015/16 period. However, the two-year average (2014/15 and 2016/17) ELA and AAR of the Phuche glacier were approximately 5480 m above sea level (asl) and 92%, respectively, while the Khardung glacier they were 5500 m asl and 13%. Results demonstrated that the timing of snowpack melt during the ablation periods significantly influenced glacier mass balance. Overall, the Khardung glacier experienced 3.7 times more mass loss than the Phuche glacier. This higher glacier melt may be attributed to changes in climatic variables and topographical variations.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"43 ","pages":"Article 101132"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579393","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

Granulite facies metamorphism of the metasediments from Tallaksenvarden and Starheimtind nunataks, central Dronning Maud Land (cDML), East Antarctica and their correlation with the eastern granulites of the East African Orogen (EAO) 东南极洲中部Dronning Maud Land (cDML) Tallaksenvarden和Starheimtind nunataks沉积的麻粒岩相变质作用及其与东非造山带东部麻粒岩的对比

IF 1.5 4区地球科学

Polar Science Pub Date : 2025-03-01 DOI: 10.1016/j.polar.2025.101166

Raghuram , Mohd Yunus Shah , Monika Mishra , Anubha Bhandari , Raymond Duraiswami

{"title":"Granulite facies metamorphism of the metasediments from Tallaksenvarden and Starheimtind nunataks, central Dronning Maud Land (cDML), East Antarctica and their correlation with the eastern granulites of the East African Orogen (EAO)","authors":"Raghuram , Mohd Yunus Shah , Monika Mishra , Anubha Bhandari , Raymond Duraiswami","doi":"10.1016/j.polar.2025.101166","DOIUrl":"10.1016/j.polar.2025.101166","url":null,"abstract":"<div><div>There are eight nunataks in cDML exposed through the vast expanse of the ice sheet between Schirmacher Oasis and the Gruber–Wohlthat Mountains. Tallaksenvarden and Starheimtind are two important nunataks that mark the eastern and western limits of their exposures. There is paucity of the metamorphic data from these nunataks which otherwise lie between the well-studied Schirmacher Oasis and Humboldt Range. These nunataks comprise a sequence of granulite facies metasedimentary rocks interlayered with pyroxene granulite. The granulite facies assemblage in the pelitic granulite is garnet + sillimanite ± kyanite + biotite + quartz + perthite ± plagioclase ± rutile ± ilmenite. <em>P-T-t</em> path estimations reveal ultrahigh temperature (UHT) metamorphism (M<sub>2</sub>, ca.630-570 Ma) with a clockwise path (>900 °C at ≥8 kbar) during the Cryogenian-Cambrian period well above the wet granite solidus for incongruent melting with significant increase in melt volume during decompression. Yttrium in garnet thermometry combined with textural evidence (symplectitic quartz, biotite and plagioclase embayment in porphyroblasts) suggest initiation of porphyroblasts growth in the pelitic granulite at c. 550 °C with continued growth during increase in temperature (∼645 °C) followed by resorption and growth coinciding with increased melt generation. These nunataks and Schirmacher Oasis expose the same lithopackage with identical metamorphic and structural evolution possibly extending southward till the inland mountains of the cDML. This study also identifies that these nunataks indeed represent a portion of the EAO with a possible transpressive deformation regime.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"43 ","pages":"Article 101166"},"PeriodicalIF":1.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579397","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

Assessment of various microwave brightness temperature products and methods for surface melt detection over Greenland ice sheet 格陵兰冰盖表面融化探测的各种微波亮度温度产品和方法评估

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101097

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

{"title":"Assessment of various microwave brightness temperature products and methods for surface melt detection over Greenland ice sheet","authors":"Pooja Mishra , Naveen Tripathi , S.R. Oza , S.K. Singh , N.Y. Bhatt , P.M. Solanki","doi":"10.1016/j.polar.2024.101097","DOIUrl":"10.1016/j.polar.2024.101097","url":null,"abstract":"<div><div><span><span>Microwave brightness temperature have widely been used for the detection of the ice sheet's surface melt conditions and understanding their spatio-temporal variability. In this study, we investigated the sensitivity of microwave brightness temperature products from three different sensors, namely, Advanced Microwave Scanning Radiometer-2 (AMSR2), Special Sensor Microwave Imager/Sounder (SSMIS) and Indian scatterometer satellite (SCATSAT-1) for surface melt detection over the Greenland ice sheet (GrIS). In-situ air temperature measurements from GC-Net </span>AWSs were used for sensitivity and inter-comparison analysis. Our findings show that brightness temperature (T</span><sub>b</sub>) from SSMIS better correlates (P<sub>coef</sub> = 0.81 for 19 GHz) with air temperature measurements in comparison to AMSR2 (P<sub>coef</sub> = 0.7 for 18 GHz) and SCATSAT-1 (P<sub>coef</sub> = 0.67). However, interestingly, AMSR2 and SCATSAT-1 uniquely discriminated the surface conditions during pre- and post-melt period, due to their heterogeneity in T<sub>b</sub> values during the two period. Error analysis with respect to AWS melt days shows that SSMIS 19 GHz T<sub>b</sub> (T<sub>b/SSMIS/19H</sub>) products with <span><em>TED</em></span> method giving the most promising observations. A wide variability in T<sub>b</sub> values is observed during the melt season across the various AWS sites depending upon the elevation, location and frequency. During our study period, using T<sub>b/SSMIS/19H</sub> for <em>TED</em> method, we observed the highest melt extent area for the extreme melt event in year 2019 (∼1.12 million km<sup>2</sup>), followed by another melt event year 2021 when it went as high as ∼1.02 million km<sup>2</sup>.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101097"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141691479","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

Rapid deceleration in the ice-flow velocity of the Shirase Glacier ice tongue and its influence on the velocity field: Observations from Sentinel-1 C-SAR 白濑冰川冰舌冰流速度的快速减速及其对速度场的影响：来自哨兵-1 C-SAR 的观测数据

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101109

S. Ohkawa , K. Doi , K. Nakamura , Y. Aoyama , H. Nagai

引用次数: 0

Mercury levels in tissues (cartilage, skin, and muscle) of the Greenland shark (Somniosus microcephalus): Potential contamination sources and implications for health and conservation 格陵兰鲨（Somniosus microcephalus）组织（软骨、皮肤和肌肉）中的汞含量：潜在污染源及其对健康和保护的影响

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101079

Sebastian Biton-Porsmoguer , Françoise Marco-Miralles , Marc Bouchoucha

{"title":"Mercury levels in tissues (cartilage, skin, and muscle) of the Greenland shark (Somniosus microcephalus): Potential contamination sources and implications for health and conservation","authors":"Sebastian Biton-Porsmoguer , Françoise Marco-Miralles , Marc Bouchoucha","doi":"10.1016/j.polar.2024.101079","DOIUrl":"10.1016/j.polar.2024.101079","url":null,"abstract":"<div><div><span><span>The jaws of the Greenland shark have high levels of mercury. Hg of cartilage in comparison with skin and muscle from the same specimen makes it possible to apprehend the distribution of the pollutant in the body. The level of the pollutant between jaw, skin and fresh meat (muscle) shows a strong correlation. The muscle is the most contaminated element in comparison with the skin and cartilage. The species presents the highest levels among different groups of sharks and the results are in accordance with previous studies. Marine ecosystems in the Arctic are globally contaminated by mercury (atmosphere, water, sediments, food web). The methylmercury reduces blood calcium levels, directly affecting the metabolism of </span>cartilage cells<span>. Even if cases of malformations could not be observed in the Greenland shark, numerous cases for other shark species have been documented in connection with heavy metals (</span></span><em>e.g</em><span>., Hg), and in particular for aplacental viviparous with potential morphological anomalies on embryos. The situation of the Greenland shark is worrying due to the conservation status, the fishing catches, the tardive sexual maturity and reproduction, the climate change and the level of mercury on its organism. The results incite to recommend ecological, environmental and fisheries management measures.</span></div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101079"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141024327","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

Unveiling risk factors influencing the selection of the Northern Sea Route: A conjoint analysis approach for Japanese shippers 揭示影响北海航线选择的风险因素：日本托运人的联合分析方法

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101129

Shinichi Yamaguchi , Hidetaka Oshima , Shinnosuke Tanabe , Hajime Yamaguchi

{"title":"Unveiling risk factors influencing the selection of the Northern Sea Route: A conjoint analysis approach for Japanese shippers","authors":"Shinichi Yamaguchi , Hidetaka Oshima , Shinnosuke Tanabe , Hajime Yamaguchi","doi":"10.1016/j.polar.2024.101129","DOIUrl":"10.1016/j.polar.2024.101129","url":null,"abstract":"<div><div>This paper explores how Japanese corporations assess risks associated with using the Northern Sea Route (NSR) as a new maritime transport route in Asia and identifies measures to promote its usage. We address two key questions: (1) What risks influence shippers' route choices in maritime transport? (2) Does risk evaluation vary by cargo type and company size? Using choice-based conjoint analysis and a conditional logit model with online survey data, we identified five main risk factors influencing shippers: route unavailability rate, delay probability, piracy probability, transport costs, and war conditions, ranked in importance from highest to lowest as war conditions, delay probability, transport costs, route unavailability rate, and piracy probability. Additionally, the risk factors significantly influencing route selection were found to be robust, showing minimal variation across company size, type of trade (import/export), and the nature of the goods transported. Our findings suggest several policy implications. Diplomatic efforts are crucial for safe vessel navigation on the NSR. Government initiatives should focus on reducing transport delays through technology investments and implementing strategies to decrease NSR delay rates without increasing shippers' costs. Additionally, emphasizing the lower piracy risks on the NSR compared to Suez Canal Route could boost its attractiveness.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101129"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169972","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

Annual velocities of the ablation zone of Panchi Nala Glacier, western Himalaya: Trends and controlling factors 喜马拉雅山西部 Panchi Nala 冰川消融区的年速度：趋势和控制因素

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101068

Purushottam Kumar Garg , Mohit Prajapati , Aparna Shukla , Supratim Guha , Iram Ali

{"title":"Annual velocities of the ablation zone of Panchi Nala Glacier, western Himalaya: Trends and controlling factors","authors":"Purushottam Kumar Garg , Mohit Prajapati , Aparna Shukla , Supratim Guha , Iram Ali","doi":"10.1016/j.polar.2024.101068","DOIUrl":"10.1016/j.polar.2024.101068","url":null,"abstract":"<div><div>Information on the glacier velocity is imperative to understand the glacier ice volume, supraglacial feature evolution and glacier-climate interaction. The present study investigates annual velocities of the ablation zone (∼4500–4800 m asl) of Panchi Nala Glacier, western Himalaya through feature tracking. For this, multi-temporal Landsat (TM and OLI) and Sentinel −2 MSI images, acquired between 2000 and 2021, were correlated using the Co-registration of Optically Sensed Images and Correlation (COSI-Corr) tool. Results reveal a mean velocity of the ablation zone to be 10.6 ± 5.6 m/y during 2000–2021, with the highest (13.8 ± 4.6 m/y) and lowest velocity (8.9 ± 2.8 m/y) observed in 2005 and 2015, respectively. There is no significant trend in the velocity, rather it is highly heterogeneous on the inter-annual scale. Further, the influence of several factors such as slope, debris cover, altitude, annual average temperature and precipitation on the glacier velocity was investigated. Results indicate that the inter-annual heterogeneity in velocity is inversely correlated with the variation of summer precipitation implying that an increase in summer precipitation decreases the glacier velocity. The spatio-temporal velocity variations are also linked with the presence of supraglacial ponds, ice cliffs and heterogeneous debris distribution over the glacier. Findings indicate that, though annual glacier velocities have not changed significantly, their magnitudes are consistently low which coupled with consistent debris increase (19.74%) and gentle slope (8.2° over ablation zone) can promote rapid growth of supraglacial ponds and ice cliffs.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101068"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140398817","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

The diversity, composition and functions of soil bacterial communities surrounding Syowa Station, East Antarctica, under different intensities of human disturbances 不同人为干扰强度下南极洲东部 Syowa 站周围土壤细菌群落的多样性、组成和功能

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101095

Shu-Kuan Wong , Satoshi Imura , Masaki Uchida , Kenichi Watanabe , Mizuho Mori , Sakae Kudoh

{"title":"The diversity, composition and functions of soil bacterial communities surrounding Syowa Station, East Antarctica, under different intensities of human disturbances","authors":"Shu-Kuan Wong , Satoshi Imura , Masaki Uchida , Kenichi Watanabe , Mizuho Mori , Sakae Kudoh","doi":"10.1016/j.polar.2024.101095","DOIUrl":"10.1016/j.polar.2024.101095","url":null,"abstract":"<div><div><span>Since the establishment of Syowa Station over six decades ago, the study on the terrestrial bacterial community surrounding the station has been notably lacking and inadequately documented. Using the latest sequencing technology, we revealed the soil bacterial composition from soil samples collected from the surrounding of the station. In doing so, we also assessed the effect of human disturbances brought upon by different activities in the proximity of the station, in contrast to those in less human interference and pristine areas. Our results show that human activities near the main station facilities, especially within the 100-m range, visibly changed the structure and functions of the </span>soil microbial community<span>. Areas with high levels of human disturbances displayed a decrease in both microbial diversity and richness, accompanied by a lower count of unique amplicon sequence variants (ASVs) compared to regions with intermediate and low human disturbances. Moreover, higher proportions of functions related to hydrocarbon degradation were also predicted from samples collected within this area. In contrast, soil microbial communities from intermediate and low human disturbances samples have higher proportions of bacterial groups and functions consistent with those in undisturbed natural habitats.</span></div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101095"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141689529","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

ALBATROSS: Advancing Southern Ocean tide modelling with high resolution and enhanced bathymetry 信天翁：推进南大洋潮汐模型的高分辨率和增强的水深测量

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101124

Eva Le Merle , Carole Belot , Ergane Fouchet , Mathilde Cancet , Ole Baltazar Andersen , Florent Lyard , Geir Moholdt , Michel Tsamados , Mahmoud El Hajj , Josephine Maton , Jérôme Benveniste , Marco Restano

{"title":"ALBATROSS: Advancing Southern Ocean tide modelling with high resolution and enhanced bathymetry","authors":"Eva Le Merle , Carole Belot , Ergane Fouchet , Mathilde Cancet , Ole Baltazar Andersen , Florent Lyard , Geir Moholdt , Michel Tsamados , Mahmoud El Hajj , Josephine Maton , Jérôme Benveniste , Marco Restano","doi":"10.1016/j.polar.2024.101124","DOIUrl":"10.1016/j.polar.2024.101124","url":null,"abstract":"<div><div>The knowledge of bathymetry and ocean tides plays a pivotal role at the crossroads of various scientific fields, especially in the Polar regions. Its significance extends to ocean circulation modeling and understanding the coupled dynamical response of the ocean, sea-ice and ice-sheet systems. In the Southern Ocean, conventional satellite altimetry measurements are rare below the 66° parallel. Hydrodynamic models are thus useful tools to provide spatially continuous information about ocean tides. However, the accuracy of ocean tide models around the Antarctic continent is currently limited by the quality of bathymetry. Recent reprocessing of decade-long CryoSat-2 data has facilitated a new computation of bathymetry around Antarctica, bringing innovative information on bathymetry gradients. This, combined with new compilations of bathymetry, ice draft, coastline, and grounding line datasets in ice-shelf regions, allows improving models and knowledge of ocean tides in the Southern Ocean. We developed a new high-resolution tidal model that implements the improved bathymetry data and includes data assimilation of satellite-altimetry tidal retrievals computed from CryoSat-2, filling the gap between the 66°S-limited coverage of the TOPEX-Jason suite missions and the Antarctic coast. Comparisons with tidal estimates derived from tide gauge measurements showed very good consistencies with an RMSE of 3 cm.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101124"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170865","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

Role of atmospheric and oceanic processes on interannual summertime (2016–2017) decrease of sea ice in the Antarctic regions of the Southern Ocean 大气和海洋过程对南大洋南极地区夏季海冰年际减少（2016-2017 年）的作用

IF 1.5 4区地球科学

Polar Science Pub Date : 2024-12-01 DOI: 10.1016/j.polar.2024.101108

Ananthu Pradeep , A. Mukherjee

{"title":"Role of atmospheric and oceanic processes on interannual summertime (2016–2017) decrease of sea ice in the Antarctic regions of the Southern Ocean","authors":"Ananthu Pradeep , A. Mukherjee","doi":"10.1016/j.polar.2024.101108","DOIUrl":"10.1016/j.polar.2024.101108","url":null,"abstract":"<div><div>In this article, the interannual variability of sea ice in the Antarctic sea ice regions between 2013–2018 is studied using a global ocean sea ice coupled model and satellite observation. The numerical model reasonably well simulates satellite observed interannual variability of sea ice concentration (SIC) and sea surface temperature (SST) in the Antarctic regions of Southern Ocean during all four austral seasons; summer (December–February), autumn (March–May), winter (June–August), and spring (September–November).</div><div>A comparison of satellite and model shows that, during last two decades between 2001–2020, summertime of 2016–2017 had the lowest (highest) SIC (SST) across the Antarctic sea ice regions. Mixed layer heat budget analysis has been performed to comprehend how thermodynamic processes affect changes in SIC and SST in the Antarctic sea ice regions. The strong positive net atmospheric heat flux and the negative ocean vertical entrainment during summertime of 2016–2017 resulted in increased SST compared to other years, which lead to decreased SIC during above years. Also, loss of sea ice during summertime of 2016–2017 in the Antarctic sea ice regions are linked with significant decrease of wind stress magnitude and increase of wind stress curl.</div></div>","PeriodicalId":20316,"journal":{"name":"Polar Science","volume":"42 ","pages":"Article 101108"},"PeriodicalIF":1.5,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179323","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