دورية أكاديمية
Landscape evolution under the southern Laurentide Ice Sheet.
| العنوان: | Landscape evolution under the southern Laurentide Ice Sheet. |
|---|---|
| المؤلفون: | Naylor S; Center for Geospatial Data Analysis and Indiana Geological and Water Survey, Indiana University, Bloomington, IN 47405, USA., Wickert AD; Department of Earth and Environmental Sciences and Saint Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN 55455, USA., Edmonds DA; Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN 47405, USA., Yanites BJ; Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN 47405, USA. |
| المصدر: | Science advances [Sci Adv] 2021 Nov 26; Vol. 7 (48), pp. eabj2938. Date of Electronic Publication: 2021 Nov 24. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 101653440 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2375-2548 (Electronic) Linking ISSN: 23752548 NLM ISO Abbreviation: Sci Adv Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: | Original Publication: Washington, DC : American Association for the Advancement of Science, [2015]- |
| مستخلص: | Subglacial landscapes, revealed in regions of recent ice-sheet retreat, provide a window into ice-sheet dynamics and interactions with evolving subglacial topography. Here, we document landscape evolution beneath the southern Laurentide Ice Sheet of North America since the end of the Pliocene, 2.6 million years (Ma) ago, by reconstructing the isostatically adjusted preglacial surface and modern bedrock topography at 250 m horizontal resolution. We use flow routing to reconstruct drainage networks and river longitudinal profiles, revealing the pattern and extent of their glacially forced reorganization. The overall mean Quaternary (2.6 Ma ago to present) erosion rate is 27 m/Ma, rising within ice-streaming corridors to 35 m/Ma (and locally reaching 400 m/Ma) and falling to 22 m/Ma in non–ice-streaming regions. Our results suggest that subglacial erosion was sufficient to lower the southern Laurentide Ice Sheet into warmer environments, thereby enhancing ablation and reducing ice-sheet extent over time. |
| References: | Proc Natl Acad Sci U S A. 2016 Mar 29;113(13):3459-64. (PMID: 26903645) Science. 1914 Feb 20;39(999):263-74. (PMID: 17834115) Nat Commun. 2019 Aug 16;10(1):3713. (PMID: 31420542) Nat Commun. 2021 Feb 23;12(1):1199. (PMID: 33623046) Science. 2015 Oct 9;350(6257):193-5. (PMID: 26450208) Science. 2012 Jan 6;335(6064):73-6. (PMID: 22223803) Nature. 2013 Dec 19;504(7480):423-6. (PMID: 24352288) Sci Adv. 2019 Jan 30;5(1):eaav2366. (PMID: 30729164) |
| تواريخ الأحداث: | Date Created: 20211124 Latest Revision: 20220302 |
| رمز التحديث: | 20221213 |
| مُعرف محوري في PubMed: | PMC8612676 |
| DOI: | 10.1126/sciadv.abj2938 |
| PMID: | 34818050 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 2375-2548 |
|---|---|
| DOI: | 10.1126/sciadv.abj2938 |