Polish Polar Research最新文献_第3页

Ice surface near melting point: Effects on the tropospheric ice 接近熔点的冰表面:对对流层冰的影响

4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/ppr.2021.137144

{"title":"Ice surface near melting point: Effects on the tropospheric ice","authors":"","doi":"10.24425/ppr.2021.137144","DOIUrl":"https://doi.org/10.24425/ppr.2021.137144","url":null,"abstract":": Atmospheric gases and chemical impurities can be stored and chemically transformed in the tropospheric ice. Impurities are rejected during freezing of the ice to the grain boundaries, free ice surfaces or inclusions. Surface snow and tropospheric ice, however, may be exposed to high temperatures and, eventually, the gases and chemical impurities can be released into the environment. It is important to study the surface structure and transport mechanisms at temperatures near the melting point because the location of impurities and their interactions with water molecules in the ice are not yet sufficiently explained. In this work, the evolution of a scratch on the bicrystalline ice surface was studied at –5℃. The surface transport mechanisms near the melting point were studied and, as a consequence, the surface structure could be determined. An ice sample was kept immersed in ultra-pure silicone oil to prevent evaporation and, thus, isolate the effect of surface diffusion. The ice sample was made with water with chemical conditions similar to the water of polar ice sheets. Photographs of the scratch were taken periodically, for approximately 50 hours, using a photographic camera coupled to an optical microscope. From these images, the evolution of the width of the scratch was studied and the surface diffusion was the dominant transport mechanism in the experiment. Finally, the ice surface self-diffusion coefficient at –5℃ was determined and it was very similar to the super-cooled water diffusion coefficient. A liquid-like behavior of ice surfaces near the melting point was found and it could have a strong influence on the reaction rates with atmospheric gases.","PeriodicalId":49682,"journal":{"name":"Polish Polar Research","volume":"2008 26","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636271","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

Meteorological conditions on Kaffiøyra (NW Spitsbergen) in 2013–2017 and their connection with atmospheric circulation and sea ice extent kaffe øyra(西北斯匹次卑尔根)2013-2017年气象条件及其与大气环流和海冰范围的关系

IF 1.3 4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/PPR.2019.129670

M. Kejna, I. Sobota

{"title":"Meteorological conditions on Kaffiøyra (NW Spitsbergen) in 2013–2017 and their connection with atmospheric circulation and sea ice extent","authors":"M. Kejna, I. Sobota","doi":"10.24425/PPR.2019.129670","DOIUrl":"https://doi.org/10.24425/PPR.2019.129670","url":null,"abstract":"This article comprises an analysis of the variability of meteorological conditions on Kaffiøyra (NW Spitsbergen, Svalbard) in 2013–2017 in connection with atmospheric circulation and the extent of sea ice. The obtained results were compared with the results of observations made at the Ny-Ålesund station. Due to the situation of the area in the polar region and the large amount of clouds, especially in summer, the annual sum of incoming solar radiation was small, amounting to an average of 2,237.8 MJ.m-2 per year. The mean air temperature in the considered period was -2.0°C. Its extreme values ranged from 15.2°C to -23.8°C. In the annual course, the highest mean temperature occurred in July (6.5°C), and the lowest in March (-7.8°C). The mean relative humidity of air was high (83%). The prevailing wind directions were from south and north sectors and this coincided with the orientation of Forlandsundet. The mean wind speed was 3.6 m.s-1. In the summer season in 1975–2017, a statistically significant air temperature increase was observed, reaching 0.28°C/10 years. The high variability of local weather conditions was caused mainly by atmospheric circulation and the impact of sea ice was much smaller in comparison.","PeriodicalId":49682,"journal":{"name":"Polish Polar Research","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68952382","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: 7

In Memoriam: Professor Krzysztof Ludwik Birkenmajer (1929–2019) an outstanding Polish geologist and polar researcher 纪念:Krzysztof Ludwik Birkenmajer教授(1929-2019)，杰出的波兰地质学家和极地研究员

4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/ppr.2019.128373

Jacek Jania

引用次数: 0

Expression patterns of molecular chaperone genes in Antarctic psychrophilic yeast, Glaciozyma antarctica PI12 in response to heat stress 南极嗜冷酵母，Glaciozyma antarctica PI12分子伴侣基因在热胁迫下的表达模式

4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/ppr.2019.129674

Nur Athirah Yusof, Clemente Michael Vui Ling Wong, Abdul Munir Abdul Murad, Farah Diba Abu Bakar, Nor Muhammad Mahadi, Ahmad Yamin Abdul Rahman, Nursyafiqi Zainuddin, Mohd Nazalan Mohd Najimudin

{"title":"Expression patterns of molecular chaperone genes in Antarctic psychrophilic yeast, Glaciozyma antarctica PI12 in response to heat stress","authors":"Nur Athirah Yusof, Clemente Michael Vui Ling Wong, Abdul Munir Abdul Murad, Farah Diba Abu Bakar, Nor Muhammad Mahadi, Ahmad Yamin Abdul Rahman, Nursyafiqi Zainuddin, Mohd Nazalan Mohd Najimudin","doi":"10.24425/ppr.2019.129674","DOIUrl":"https://doi.org/10.24425/ppr.2019.129674","url":null,"abstract":": Microbes living in the polar regions have some common and unique strategies to respond to thermal stress. Nevertheless, the amount of information available, especially at the molecular level is lacking for some organisms such as Antarctic psychrophilic yeast. For instance, it is not known whether molecular chaperones in Antarctic yeasts play similar roles to those from mesophilic yeasts when they are exposed to heat stress. Therefore, this project aimed to determine the gene expression patterns and roles of molecular chaperones in Antarctic psychrophilic Glaciozyma antarctica PI12 that was exposed to heat stress. G. antarctica PI12 was grown at its optimal growth temperature of 12ºC and later exposed to heat stresses at 16ºC and 20ºC for 6 hours. Transcriptomes of those cells were extracted, sequenced and analyzed. Thirty-three molecular chaperone genes demonstrated differential expression of which 23 were up-regulated while 10 were down-regulated. Functions of up-regulated molecular chaperone genes were related to protein binding, response to a stimulus, chaperone binding, cellular response to stress, oxidation, and reduction, ATP binding, DNA-damage response and regulation for cellular protein metabolic process. On the other hand, functions of down-regulated molecular chaperone genes were related to chaperone-mediated protein complex assembly, transcription, cellular macromolecule metabolic process, regulation of cell growth and ribo-some biogenesis. The findings provided information on how molecular chaperones work together in a complex network to protect the cells under heat stress. It also highlights the evolutionary conserved protective role of molecular chaperones in psychrophilic yeast, G. antarctica , and cerevisiae .","PeriodicalId":49682,"journal":{"name":"Polish Polar Research","volume":"11 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135544629","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

Lichens of the Frankenhalvøya Peninsula (Northern of Barentsøya, Svalbard archipelago) Frankenhalvøya半岛的地衣(斯瓦尔巴群岛巴伦支øya北部)

4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/ppr.2021.138591

Liudmila Konoreva, Sergey Chesnokov

引用次数: 0

The impact of expeditioners’ personality traits on their interpersonal interactions during long-term Antarctic expeditions 长期南极考察中探险者人格特质对人际交往的影响

4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/ppr.2021.136512

{"title":"The impact of expeditioners’ personality traits on their interpersonal interactions during long-term Antarctic expeditions","authors":"","doi":"10.24425/ppr.2021.136512","DOIUrl":"https://doi.org/10.24425/ppr.2021.136512","url":null,"abstract":": Interpersonal interaction performance is significantly determined by group members’ personality traits. If a group lives in long-term isolation, the influence of personality traits on interpersonal interaction performance will be even stronger. The current study identified and examined the impact of the personality traits of the personnel living at the Ukrainian Antarctic Akademik Vernadsky station ( N = 35) on their interpersonal interactions during long-term Antarctic expeditions. The results show that expeditioners’ personality traits significantly determined their interpersonal interactions. However, the influence of personality traits on different areas of interactions can vary significantly among different groups of expeditioners, even sometimes in diametrically opposite directions. The main reason for this is a formed microclimate specific to each group and corresponding group norms for formal and informal relations due to significant differences in personality traits that are characteristic of different groups’ participants. We determined that eleven indicators, out of a total of 23 examined personality traits, significantly differed among expeditioners from different groups (different expeditions). The study results can be used to enable better psychological selection of Antarctic expedition participants and to provide psychological support for these individuals.","PeriodicalId":49682,"journal":{"name":"Polish Polar Research","volume":"16 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135634142","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: 2

Micromorphology of cryoconite on Garabashi and Skhelda glaciers and soils of Baksan Gorge, Mt. Elbrus, Central Caucasus 中高加索厄尔布鲁士山Baksan峡谷Garabashi和Skhelda冰川和土壤中冰结石的微观形态

4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/ppr.2021.138590

引用次数: 1

Seasonality of isotopic and chemical composition of snowpack in the vicinity of Jang Bogo Station, East Antarctica 东南极洲张伯果站附近积雪同位素和化学成分的季节性特征

4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/ppr.2021.137146

{"title":"Seasonality of isotopic and chemical composition of snowpack in the vicinity of Jang Bogo Station, East Antarctica","authors":"","doi":"10.24425/ppr.2021.137146","DOIUrl":"https://doi.org/10.24425/ppr.2021.137146","url":null,"abstract":": Seasonal variations of the isotopic and chemical compositions of snowpits can provide useful tools for dating the age of the snowpit and examining the sources of aerosol. Based on the seasonal layers with δD and δ 18 O maxima and minima, it was determined that the snowpit, conducted in the vicinity of the Jang Bogo Station in Antarctica, contained snow deposited over a three-year period (2008–2010). Distinct seasonal variations of stable water isotopes were observed, with a slope of 8.2 from the linear isotopic relationship between oxygen and hydrogen, which indicates that the snow accumulated during three years without a significant post-depositional process. The positive correlations (r > 0.85) between Na + and other ions in the winter period and the positive relationship with the concentrations of the methanesulphonic acid (MSA) and non-sea salt sulfate (nssSO 42– ) in the warm period (r = 0.6, spring to summer) indicate the significant contributions of an oceanic source to the snowpit. Based on principal component analysis, the isotopic and chemical variables were classified into species representing input of sea-salt aerosol and suggesting potential seasonal markers. This study will support further investigations using ice cores in this region.","PeriodicalId":49682,"journal":{"name":"Polish Polar Research","volume":"2014 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135637270","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: 2

Flora of lichens, mosses and liverworts of Wrangel Island: New records 弗兰格尔岛地衣、苔藓和苔类植物区系:新记录

4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/ppr.2022.140361

引用次数: 0

Sea ice regime in the Kara Sea during 2003–2017 based on high-resolution satellite data 基于高分辨率卫星数据的2003-2017年喀拉海海冰状况

IF 1.3 4区地球科学

Polish Polar Research Pub Date : 2023-11-06 DOI: 10.24425/PPR.2019.129671

C. Duan, S. Dong, Zhifeng Wang

{"title":"Sea ice regime in the Kara Sea during 2003–2017 based on high-resolution satellite data","authors":"C. Duan, S. Dong, Zhifeng Wang","doi":"10.24425/PPR.2019.129671","DOIUrl":"https://doi.org/10.24425/PPR.2019.129671","url":null,"abstract":"In this paper, the recent ice regime variations in the Kara Sea have been described and quantified based on the high-resolution remote sensing database from 2003 to 2017. In general, the Kara Sea is fully covered with thicker sea ice in winter, but sea ice cover is continuously declining during the summer. The year 2003 was the year with the most severe ice conditions, while 2012 and 2016 were the least severe. The extensive sea ice begins to break up before May and becomes completely frozen at the end of December again. The duration of ice melting is approximately twice than that of the freezing. Since 2007, the minimum ice coverage has always been below 5%, resulting in wide open-waters in summer. Furthermore, the relevant local driving factors of external atmospheric forcing on ice conditions have been quantitatively calculated and analyzed. Winter accumulated surface air temperature has been playing a primary role on the ice concentration and thickness condition in winter and determining ice coverage index in the following melt-freeze stage. Correlation coefficients between winter accumulated temperature and ice thickness anomaly index, the ice coverage anomaly index, duration of melt-freeze stage can approach -0.72, -0.83 and 0.80, respectively. In summer, meridional winds contribute closely to summer ice coverage anomaly index, with correlation coefficient exceeding 0.80 since 2007 and 0.90 since 2010.","PeriodicalId":49682,"journal":{"name":"Polish Polar Research","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68952450","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