globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2013.10.001
Scopus记录号: 2-s2.0-84886284233
论文题名:
Late holocene glacial history of the copper river delta, coastal south-central alaska, and controls on valley glacier fluctuations
作者: Barclay D.J.; Yager E.M.; Graves J.; Kloczko M.; Calkin P.E.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 81
起始页码: 74
结束页码: 89
语种: 英语
英文关键词: Alaska ; First Millennium A.D. ; Holocene ; Little Ice Age ; Medieval Warm Period ; Solar irradiance ; Tree-rings ; Valley glacier
Scopus关键词: Alaska ; First Millennium A.D ; Holocenes ; Little Ice Age ; Medieval Warm Period ; Solar irradiances ; Tree rings ; Atmospheric aerosols ; Forestry ; Glacial geology ; Ice ; Ice control ; Solar radiation ; Stratigraphy ; Landforms ; climate forcing ; delta ; glacial history ; Holocene ; solar radiation ; tree ring ; valley glacier ; Aerosols ; Geology ; Ice ; Sun Light ; Alaska ; Copper Delta ; Switzerland ; United States
英文摘要: Fluctuations of four valley glaciers in coastal south-central Alaska are reconstructed for the past two millennia. Tree-ring crossdates on 216 glacially killed stumps and logs provide the primary age control, and are integrated with glacial stratigraphy, ages of living trees on extant landforms, and historic forefield photographs to constrain former ice margin positions. Sheridan Glacier shows four distinct phases of advance: in the 530s to c.640s in the First Millennium A.D., and the 1240s to 1280s, 1510s to 1700s, and c.1810s to 1860s during the Little Ice Age (LIA). The latter two LIA advances are also recorded on the forefields of nearby Scott, Sherman and Saddlebag glaciers. Comparison of the Sheridan record with other two-millennia long tree-ring constrained valley glacier histories from south-central Alaska and Switzerland shows the same four intervals of advance. These expansions were coeval with decreases in insolation, supporting solar irradiance as the primary pacemaker for centennial-scale fluctuations of mid-latitude valley glaciers prior to the 20th century. Volcanic aerosols, coupled atmospheric-oceanic systems, and local glacier-specific effects may be important to glacier fluctuations as supplemental forcing factors, for causing decadal-scale differences between regions, and as a climatic filter affecting the magnitude of advances. © 2013 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60448
Appears in Collections:过去全球变化的重建

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作者单位: Geology Department, SUNY Cortland, Cortland, NY 13045, United States; Center for Ecohydraulics Research, Department of Civil Engineering, University of Idaho, Boise, ID 83702, United States; INSTAAR, University of Colorado at Boulder, Boulder, CO 80309, United States

Recommended Citation:
Barclay D.J.,Yager E.M.,Graves J.,et al. Late holocene glacial history of the copper river delta, coastal south-central alaska, and controls on valley glacier fluctuations[J]. Quaternary Science Reviews,2013-01-01,81
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