Journal of Glaciology最新文献_第4页

MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors MODIS 南极洲东部陆地表面温度：精度及其主要影响因素

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-14 DOI: 10.1017/jog.2024.17

Zhao-Hui Zhai, Yetang Wang, C. Reijmer, P. Smeets, Xueying Zhang, Wuying Zhang

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Angle of Repose of Granulated Ice: Effect of Wood Ash 粒状冰的仰角：木灰的影响

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-14 DOI: 10.1017/jog.2024.18

William M. Harris, A. Murdza, E. Schulson

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MODIS land surface temperature in East Antarctica: accuracy and its main affecting factors MODIS 南极洲东部陆地表面温度：精度及其主要影响因素

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-14 DOI: 10.1017/jog.2024.17

Zhao-Hui Zhai, Yetang Wang, C. Reijmer, P. Smeets, Xueying Zhang, Wuying Zhang

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Recent Change in Surface Mass-Balance Trends of Glaciers on James Ross Island, North-Eastern Antarctic Peninsula 南极半岛东北部詹姆斯罗斯岛冰川地表质量平衡趋势的近期变化

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-08 DOI: 10.1017/jog.2024.16

Zbyněk Engel, K. Láska, J. Smolikova, J. Kavan

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Recent Change in Surface Mass-Balance Trends of Glaciers on James Ross Island, North-Eastern Antarctic Peninsula 南极半岛东北部詹姆斯罗斯岛冰川地表质量平衡趋势的近期变化

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-08 DOI: 10.1017/jog.2024.16

Zbyněk Engel, K. Láska, J. Smolikova, J. Kavan

引用次数: 0

Response of lacustrine glacier dynamics to atmospheric forcing in the Cordillera Darwin 科迪勒拉达尔文湖泊冰川动力学对大气强迫的响应

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-05 DOI: 10.1017/jog.2024.14

Lukas Langhamer, Tobias Sauter, Franziska Temme, Niklas Werner, Florian Heinze, Jorge Arigony-Neto, Inti Gonzalez, Ricardo Jaña, Christoph Schneider

{"title":"Response of lacustrine glacier dynamics to atmospheric forcing in the Cordillera Darwin","authors":"Lukas Langhamer, Tobias Sauter, Franziska Temme, Niklas Werner, Florian Heinze, Jorge Arigony-Neto, Inti Gonzalez, Ricardo Jaña, Christoph Schneider","doi":"10.1017/jog.2024.14","DOIUrl":"https://doi.org/10.1017/jog.2024.14","url":null,"abstract":"Calving glaciers respond quickly to atmospheric variability through ice dynamic adjustment. Particularly, single weather extremes may cause changes in ice-flow velocity and terminus position. Occasionally, this can lead to substantial event-driven mass loss at the ice front. We examine changes in terminus position, ice-flow velocity, and calving flux at the grounded lacustrine Schiaparelli Glacier in the Cordillera Darwin using geo-referenced time-lapse camera images and remote sensing data (Sentinel-1) from 2015 to 2022. Lake-level records, lake discharge measurements, and a coupled energy and mass balance model provide insight into the subglacial water discharge. We use downscaled reanalysis data (ERA-5) to identify climate extremes and track land-falling atmospheric rivers to investigate the ice-dynamic response on possible atmospheric drivers.Meltwater controls seasonal variations in ice-flow velocity, with an efficient subglacial drainage system developing during the warm season and propagating up-glacier. Calving accounts for 4.2% of the ice loss. Throughout the year, warm spells, wet spells, and landfalling atmospheric rivers promote calving. The progressive thinning of the ice destabilizes the terminus position, highlighting the positive feedback between glacier thinning, near-terminus ice-flow acceleration, and calving flux.","PeriodicalId":15981,"journal":{"name":"Journal of Glaciology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140025509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Validating ensemble historical simulations of Upernavik Isstrøm (1985–2019) using observations of surface velocity and elevation 利用地表速度和海拔观测数据验证乌珀纳维-伊斯特拉姆的历史模拟集合（1985-2019 年

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-05 DOI: 10.1017/jog.2024.10

Eliot Jager, Fabien Gillet-Chaulet, Jérémie Mouginot, Romain Millan

{"title":"Validating ensemble historical simulations of Upernavik Isstrøm (1985–2019) using observations of surface velocity and elevation","authors":"Eliot Jager, Fabien Gillet-Chaulet, Jérémie Mouginot, Romain Millan","doi":"10.1017/jog.2024.10","DOIUrl":"https://doi.org/10.1017/jog.2024.10","url":null,"abstract":"The future of tidewater glaciers in response to climate warming is one of the largest sources of uncertainty in the contribution of the Greenland ice sheet to global sea-level rise. In this study, we investigate the ability of an ice-sheet model to reproduce the past evolution of the velocity and surface elevation of a tidewater glacier, Upernavik Isstrøm, by prescribing front positions. To achieve this, we run two ensembles of simulations with a Weertman and a regularised-Coulomb friction law. We show that the ice-flow model has to include a reduction in friction in the first 15 km upstream of the ice front in fast-flowing regions to capture the trends observed during the 1985–2019 period. Without this process, the ensemble model overestimates the ice flow before the retreat of the front in 2005 and does not fully reproduce its acceleration during the retreat. This results in an overestimation of the total mass loss between 1985 and 2019 of 50% (300 vs 200 Gt). Using a variance-based sensitivity analysis, we show that uncertainties in the friction law and the ice-flow law have a greater impact on the model results than surface mass balance and initial surface elevation.","PeriodicalId":15981,"journal":{"name":"Journal of Glaciology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140075585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Sub-regional variability in the influence of ice-contact lakes on Himalayan glaciers 冰湖对喜马拉雅冰川影响的次区域差异

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-02 DOI: 10.1017/jog.2024.9

Alex C. Scoffield, A. Rowan, D. Quincey, J. Carrivick, A. Sole, Simon J. Cook

引用次数: 0

Sub-regional variability in the influence of ice-contact lakes on Himalayan glaciers 冰湖对喜马拉雅冰川影响的次区域差异

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-02-02 DOI: 10.1017/jog.2024.9

Alex C. Scoffield, A. Rowan, D. Quincey, J. Carrivick, A. Sole, Simon J. Cook

引用次数: 0

Greater than the sum of its parts: optical remote sensing and sediment core data provide a holistic perspective on glacial processes 大于各部分之和：光学遥感和沉积岩芯数据提供了冰川过程的整体视角

IF 3.4 3区地球科学

Journal of Glaciology Pub Date : 2024-01-29 DOI: 10.1017/jog.2024.7

Henry Jacob Miller Gage, Carolyn Hope Eyles

{"title":"Greater than the sum of its parts: optical remote sensing and sediment core data provide a holistic perspective on glacial processes","authors":"Henry Jacob Miller Gage, Carolyn Hope Eyles","doi":"10.1017/jog.2024.7","DOIUrl":"https://doi.org/10.1017/jog.2024.7","url":null,"abstract":"In this letter we make the case that closer integration of sediment core and passive optical remote sensing data would provide new insights into past and contemporary glacio-sedimentary processes. Sediment cores are frequently used to study past glacial processes and environments as they contain a lengthy geochemical and sedimentological record of changing conditions. In contrast, optical remote sensing imagery is used extensively to examine contemporary glacial processes, including meltwater dynamics, glacial retreat, calving, and ice accumulation. While paleoenvironmental data from sediment cores and optical remote sensing imagery are rarely used in tandem, they are complementary. Sediment core records are spatially discrete, providing long-term paleoenvironmental proxy data which require assumptions about environment-sediment linkages. Optical imagery offers precise, spatially extensive data to visualize contemporary processes often limited in their temporal extent. We suggest that methodologies which integrate optical remotely sensing with sediment core data allow direct observation of processes interpolated from sedimentological analysis and achieve a more holistic perspective on glacial processes. This integration addresses the limitations of both data sources and can achieve a stronger understanding of glacier dynamics by expanding the spatiotemporal extent of data, reducing the uncertainty of interpretations, and broadening the local analyses to regional and global scales.","PeriodicalId":15981,"journal":{"name":"Journal of Glaciology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139969181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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