کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8914665 | 1640741 | 2018 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Subpolar North Atlantic sea surface temperature since 6 ka BP: Indications of anomalous ocean-atmosphere interactions at 4-2 ka BP
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کلمات کلیدی
North Atlantic - آتلانتیک شمالیPaleoclimatology - اقلیم شناسی دیرینهSea surface temperature - دمای سطح دریا، SSTDiatoms - دیاتومهاPaleoceanography - دیرینه اقیانوس شناسیSedimentology-marine cores - رسوب شناسی-هسته های مرکزیEast Greenland Current - شرق گرینلند جاری استMicropaleontology - میکروپلنتولوژیNorth Atlantic oscillation - نوسان قطبی شمالHolocene - هولوسن
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Atmospheric circulation may change with future climate change in response to modification of meridional temperature gradients, but the potential influence on ocean circulation is as yet unclear. Over the mid-late Holocene, atmospheric circulation in the North Atlantic region has fluctuated on millennial timescales; therefore, the ocean response to these changes can be investigated using the paleoceanographic records that have been developed in the north-eastern subpolar North Atlantic. Here, we present a diatom-based sea surface temperature reconstruction from the Iceland Basin, south of Iceland; the reconstruction shows the warmest temperatures of the record at 6.1-4 ka BP, cooler temperatures at 4-2 ka BP and warmer temperatures thereafter. Inter-record comparisons indicate that the cold period at c. 4-2 ka BP may have resulted from a strengthened East Greenland Current and/or melting of the Greenland ice sheet, in response to a negative North Atlantic Oscillation. The findings highlight that atmospheric circulation changes are likely to cause pronounced variations in the latitudinal exchange of heat, which may have consequences for deep-water formation and global ocean circulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Science Reviews - Volume 194, 15 August 2018, Pages 128-142
Journal: Quaternary Science Reviews - Volume 194, 15 August 2018, Pages 128-142
نویسندگان
Lisa Claire Orme, Arto Miettinen, Dmitry Divine, Katrine Husum, Christof Pearce, Nicolas Van Nieuwenhove, Andreas Born, Rahul Mohan, Marit-Solveig Seidenkrantz,