کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6348212 | 1621660 | 2014 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Franz Josef and Fox Glaciers, New Zealand: Historic length records
ترجمه فارسی عنوان
فرانتس یوسف و یخچال فاکس، نیوزیلند: پرونده های تاریخی
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کلمات کلیدی
طول یخچال، زمان پاسخ، تغییر آب و هوا، بقایای پوشش، یخچال فاکس، فرانسیس یوسف یخچال،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
Compilation of modern and historical length change records for Franz Josef and Fox Glaciers demonstrates that these glaciers have lost ~Â 3Â km in length and at least 3-4Â km2 in area since the 1800s, with the greatest overall loss occurring between 1934 and 1983. Within this dramatic and ongoing retreat, both glaciers have experienced periods of re-advance. The record from Franz Josef Glacier is the most detailed, and shows major advances from 1946 to 1951 (340Â m), 1965-1967 (400Â m), 1983-1999 (1420Â m) and 2004-2008 (280Â m). At Fox Glacier the record is similar, with advances recorded during 1964-1968 (60Â m), 1985-1999 (710Â m) and 2004-2008 (290Â m). Apart from the latest advance event, the magnitude of advance has been greater at Franz Josef Glacier, suggesting a higher length sensitivity. Analysis of the relationship between glacier length and a reconstructed annual equilibrium line altitude (ELA) record shows that the glaciers react very quickly to ELA variations - with the greatest correlation at 3-4Â years' lag. The present (2014) retreat is the fastest retreat in the records of both glaciers. While decadal length fluctuations have been linked to hemispheric ocean-atmosphere variability, the overall reduction in length is a clear sign of twentieth century warming. However, documenting glacier length changes can be challenging; especially when increased surface debris-cover makes identification of the 'true' terminus a convoluted process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Global and Planetary Change - Volume 121, October 2014, Pages 41-52
Journal: Global and Planetary Change - Volume 121, October 2014, Pages 41-52
نویسندگان
Heather Purdie, Brian Anderson, Trevor Chinn, Ian Owens, Andrew Mackintosh, Wendy Lawson,