کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1045800 | 944835 | 2010 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Little Ice Age fluctuations of Glaciar RÃo Manso in the north Patagonian Andes of Argentina
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Little Ice Age fluctuations of Glaciar RÃo Manso in the north Patagonian Andes of Argentina Little Ice Age fluctuations of Glaciar RÃo Manso in the north Patagonian Andes of Argentina](/preview/png/1045800.png)
چکیده انگلیسی
Little Ice Age (LIA) fluctuations of Glaciar RÃo Manso, north Patagonian Andes, Argentina are studied using information from previous work and dendrogeomorphological analyses of living and subfossil wood. The most extensive LIA expansion occurred between the late 1700s and the 1830-1840s. Except for a massive older frontal moraine system apparently predating ca. 2240 14C yr BP and a small section of a south lateral moraine ridge that is at least 300 yr old, the early nineteenth century advance overrode surficial evidence of any earlier LIA glacier events. Over the past 150 yr the gently sloping, heavily debris-covered lower glacier tongue has thinned significantly, but several short periods of readvance or stasis have been identified and tree-ring dated to the mid-1870s, 1890s, 1900s, 1920s, 1950s, and the mid-1970s. Ice mass loss has increased in recent years due to calving into a rapidly growing proglacial lake. The neighboring debris-free and land-based Glaciar FrÃas has also retreated markedly in recent years but shows substantial differences in the timing of the peak LIA advance (early 1600s). This indicates that site-specific factors can have a significant impact on the resulting glacier records and should thus be considered carefully in the development and assessment of regional glacier chronologies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Research - Volume 73, Issue 1, January 2010, Pages 96-106
Journal: Quaternary Research - Volume 73, Issue 1, January 2010, Pages 96-106
نویسندگان
M.H. Masiokas, B.H. Luckman, R. Villalba, A. Ripalta, J. Rabassa,