کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8868335 | 1622097 | 2018 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Climate forcings on vegetation of the southeastern Yucatán Peninsula (Mexico) during the middle to late Holocene
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Climate and vegetation history from the Yucatán Peninsula, southeastern Mexico, are inferred from a mangrove sediment core deposited between the middle and late Holocene (~5600-1700â¯calâ¯yrâ¯B.P.) in the Rio Hondo Delta. Fossil pollen and concentrations of Ca and Fe and Ca/Fe ratio in sediments are used to record changes in vegetation and climate. Palaeoecological and palaeoclimatic interpretations obtained from pollen abundances and associations and Fe/Ca ratio coincide with dynamics of major global forcings of climate change like ITCZ, ENSO and global cooling. Mesic conditions enabled tropical forest expansion during the middle Holocene (~5600-3650â¯calâ¯yrâ¯B.P.), although there were periodic dry episodes at ~5200â¯calâ¯yrâ¯B.P. and at ~4300â¯calâ¯yrâ¯B.P. that caused disturbance and enabled herbaceous vegetation to expand. Changes in sedimentation and a gradual change from semi-evergreen to dry tropical forest occurred at ~3650â¯calâ¯yrâ¯B.P., with increasing ENSO activity and southward migration of the ITCZ during transition of the middle to late Holocene. The driest period and lowest forest cover occurred between ~2600 and 2000â¯calâ¯yrâ¯B.P. Data show that over the last two millennia, influence of the ENSO on southeastern Mexico is stronger compared to other proxy-records of climate variability from the Caribbean region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 495, 15 April 2018, Pages 214-226
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 495, 15 April 2018, Pages 214-226
نویسندگان
Alejandro A. Aragón-Moreno, Gerald A. Islebe, Priyadarsi D. Roy, Nuria Torrescano-Valle, Andreas D. Mueller,