Arctic, Antarctic, and Alpine Research最新文献_第6页

New data on the palynostratigraphy of the Mikulinian (Eemian) deposits in the lower reaches of the Pyoza River (northeastern White Sea region) 白海东北部裴扎河下游米库期(Eemian)沉积孢粉地层新资料

IF 2 4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-07-12 DOI: 10.30758/0555-2648-2023-69-2-206-227

О. Rudenko, Е. Taldenkova, H. Bauch, Ya. S. Оvsepyan

{"title":"New data on the palynostratigraphy of the Mikulinian (Eemian) deposits in the lower reaches of the Pyoza River (northeastern White Sea region)","authors":"О. Rudenko, Е. Taldenkova, H. Bauch, Ya. S. Оvsepyan","doi":"10.30758/0555-2648-2023-69-2-206-227","DOIUrl":"https://doi.org/10.30758/0555-2648-2023-69-2-206-227","url":null,"abstract":"The palynological method was used to study a 455 cm thick marine sediment sequence, which overlies the Moscovian moraine in the Bychye-2 section on the Pyoza River (Arkhangel’sk region). The pollen records obtained allowed us to make a palynozonal subdivision of the section and to trace the plant cover transformations that occurred in the northeastern White Sea region during the Boreal transgression. When comparing the established local palynozones with the regional subdivisions of the reference sections Bychye-1, located 5 km upstream on the Pyoza River from the Bychye-2 site, and Peski on the Karelian Isthmus, we also employed the methods of correlation and event palynostratigraphy. It has been found that the marine sediments in the Bychye-2 section accumulated from the end of the Moscovian glaciation (~ 131 ka BP) until ~ 119,5 ka BP. The seven local palynozones established in the Bychye-2 section indicate a consistent change in climatic conditions and vegetational feedbacks. The main trend is the rapid displacement of Arctic-type shrub-herbaceous communities by pine-birch forests at the very beginning of the Mikulinian (Eemian) interglacial and the subsequent rise in the proportion of dark coniferous elements in the forests due to the growing humidity of the climate in the course of the transgression. A significant warming of the climate led to the emergence of thermophilic deciduous plants (oak, elm, hazel, and possibly even hornbeam) in the forests of the region. The predominance of pine-birch forests and the disappearance of all thermo- and hygrophilic elements of the vegetation followed the deterioration of climatic conditions during the final stage of the Mikulinian interglacial.","PeriodicalId":8391,"journal":{"name":"Arctic, Antarctic, and Alpine Research","volume":"45 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89924928","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

Multi-proxy evidence of unprecedented hydroclimatic change in a high Arctic proglacial lake: Linnévatnet, Svalbard 高北极前冰川湖空前水文气候变化的多代理证据:斯瓦尔巴群岛linnsamatnet

IF 2 4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-07-11 DOI: 10.1080/15230430.2023.2223403

Francois Lapointe, M. Retelle, R. Bradley, W. Farnsworth, E. Støren, Timothy L. Cook, Josiane Rosario

引用次数: 0

Tundra conservation challenged by forest expansion in a complex mountainous treeline ecotone as revealed by spatially explicit tree aboveground biomass modeling 空间显式树木地上生物量建模揭示了复杂山地树线交错带森林扩张对苔原保护的挑战

IF 2 4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-07-06 DOI: 10.1080/15230430.2023.2220208

S. Kruse, I. Shevtsova, B. Heim, L. Pestryakova, Evgeniy S. Zakharov, U. Herzschuh

引用次数: 0

Arctic ecosystem restoration with native tundra bryophytes 利用原生冻土带苔藓植物恢复北极生态系统

IF 2 4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-05-25 DOI: 10.1080/15230430.2023.2209394

Jasmine JM Lamarre, A. Dhar, M. Naeth

引用次数: 2

Drivers of soil temperature variation in alpine lichen heaths and shrub vegetation during the summer 夏季高寒地衣荒原和灌木植被土壤温度变化的驱动因素

IF 2 4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-05-25 DOI: 10.1080/15230430.2023.2209397

Peter Aartsma, A. Odland, S. Reinhardt, H. Renssen

{"title":"Drivers of soil temperature variation in alpine lichen heaths and shrub vegetation during the summer","authors":"Peter Aartsma, A. Odland, S. Reinhardt, H. Renssen","doi":"10.1080/15230430.2023.2209397","DOIUrl":"https://doi.org/10.1080/15230430.2023.2209397","url":null,"abstract":"Lichen heaths are decreasing in abundance in alpine and Arctic areas because of an increased competition with shrubs. This shift in vegetation might have important consequences for the soil temperature. The aim of this study is to find the drivers of the variation in soil temperature below lichen heaths and shrubs. Moreover, we want to gain more insight in the variability of the soil temperature below lichen heaths. We measured the soil temperature in thirty lichen plots and fifteen shrub plots in an alpine area in southern Norway during July and August 2019. We applied several treatments to study the drivers behind the variation in soil temperature between lichen heaths and shrub vegetation. We found that the average soil temperature was 1.45°C higher below lichen heaths than below shrub vegetation. Moreover, we measured a difference in soil temperature of 1.66°C between north-and south-facing lichen heaths, which contributes to the small-scale spatial variability in soil temperature below lichen heaths. Based on our experiments, we conclude that the buffering capacity of the litter layer below shrubs and shading of the soil by the shrub canopy lead to a lower soil temperature below shrubs compared to lichen heaths during the summer.","PeriodicalId":8391,"journal":{"name":"Arctic, Antarctic, and Alpine Research","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44936829","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

Will current protected areas harbor refugia for threatened Arctic vegetation types until 2050? A first assessment 到2050年，目前的保护区还会为受威胁的北极植被类型提供避难所吗?第一个评估

IF 2 4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-05-11 DOI: 10.1080/15230430.2023.2203478

Merin Reji Chacko, Jacqueline Oehri, E. Plekhanova, G. Schaepman‐Strub

引用次数: 0

Integrating local environmental observations and remote sensing to better understand the life cycle of a thermokarst lake in Arctic Alaska 整合当地环境观测和遥感，以更好地了解阿拉斯加北极热岩溶湖的生命周期

IF 2 4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-05-02 DOI: 10.1080/15230430.2023.2195518

B. Jones, Susan Schaeffer Tessier, T. Tessier, M. Brubaker, M. Brook, Jackie Schaeffer, M. W. Ward Jones, G. Grosse, Ingmar Nitze, Tabea Rettelbach, Sebastian Zavoico, Jason A. Clark, K. Tape

引用次数: 1

Meteorological conditions and snow-avalanche occurrence over three snow seasons (2017–2020) in Tasiapik Valley, Umiujaq, Nunavik 努那维克Umiujaq Tasiapik山谷三个雪季(2017-2020)的气象条件和雪崩发生

IF 2 4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-04-24 DOI: 10.1080/15230430.2023.2194492

Jérémy Grenier, N. Bhiry, A. Decaulne

引用次数: 0

About the cover — Arctic, Antarctic, and Alpine Research, Volume 55(1) 关于覆盖-北极，南极和高山研究，第55卷(1)

4区地球科学

Arctic, Antarctic, and Alpine Research Pub Date : 2023-04-11 DOI: 10.1080/15230430.2023.2192121

引用次数: 0

Heat balance of a low-elevated Svalbard glacier during the ablation season: A case study of Aldegondabreen 消融季节低海拔斯瓦尔巴冰川的热平衡：以Aldgondabreen为例

IF 2 4区地球科学