{"title":"Fluvial transport in the deglaciated Antarctic catchment – Bohemian Stream, James Ross Island","authors":"J. Kavan","doi":"10.1080/04353676.2021.2010401","DOIUrl":null,"url":null,"abstract":"ABSTRACT\n With the ongoing climate change and the prolongation of the summer melting season and increasing air temperature that this entails, fluvial transport is likely to become a more important process shaping the deglaciated areas of Antarctica. Quantification of suspended sediment transport in the deglaciated catchment of the Bohemian Stream is presented in this study. It was shown that a large amount of fine-grained material is being transported even in the relatively small catchment during the short period of the Antarctic summer. The average calculated suspended sediment concentration during the 2018 austral summer reached 274.6 mg l−1, which corresponded to an average suspended sediment load of 3662 kg day−1 and suspended sediment yield of 68 t km−2 year−1 when considering the flow season to be approximately 4 months per year. Such values are considerably higher than those reported from continental Antarctica; however, they are lower compared to most of the Arctic catchments.","PeriodicalId":55112,"journal":{"name":"Geografiska Annaler Series A-Physical Geography","volume":"9 32 1","pages":"1 - 10"},"PeriodicalIF":1.4000,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geografiska Annaler Series A-Physical Geography","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1080/04353676.2021.2010401","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}
引用次数: 2
Abstract
ABSTRACT
With the ongoing climate change and the prolongation of the summer melting season and increasing air temperature that this entails, fluvial transport is likely to become a more important process shaping the deglaciated areas of Antarctica. Quantification of suspended sediment transport in the deglaciated catchment of the Bohemian Stream is presented in this study. It was shown that a large amount of fine-grained material is being transported even in the relatively small catchment during the short period of the Antarctic summer. The average calculated suspended sediment concentration during the 2018 austral summer reached 274.6 mg l−1, which corresponded to an average suspended sediment load of 3662 kg day−1 and suspended sediment yield of 68 t km−2 year−1 when considering the flow season to be approximately 4 months per year. Such values are considerably higher than those reported from continental Antarctica; however, they are lower compared to most of the Arctic catchments.
随着气候的持续变化和夏季融化季节的延长以及随之而来的气温的升高，河流运输可能成为塑造南极洲冰川消融地区的一个更重要的过程。本文对波希米亚河消冰流域的悬沙输运进行了定量研究。结果表明，在南极夏季的短时间内，即使在相对较小的集水区，也有大量细粒物质被输送。2018年南方夏季平均悬沙浓度为274.6 mg l−1，考虑每年约4个月的流季，平均悬沙负荷为3662 kg d−1，悬沙产出量为68 t km−2 year−1。这些数值远高于南极洲大陆报告的数值;然而，与大多数北极集水区相比，它们的水位较低。
期刊介绍：
Geografiska Annaler: Series A, Physical Geography publishes original research in the field of Physical Geography with special emphasis on cold regions/high latitude, high altitude processes, landforms and environmental change, past, present and future.
The journal primarily promotes dissemination of regular research by publishing research-based articles. The journal also publishes thematic issues where collections of articles around a specific themes are gathered. Such themes are determined by the Editors upon request. Finally the journal wishes to promote knowledge and understanding of topics in Physical Geography, their origin, development and current standing through invited review articles.
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