波斯湾后冰期洪水和全新世气候变迁

IF 1.9 3区 地球科学 Q3 GEOGRAPHY, PHYSICAL Journal of Quaternary Science Pub Date : 2024-03-12 DOI:10.1002/jqs.3614
Abdolmajid Naderi Beni, Guillaume Leduc, Morteza Djamali, Arash Sharifi, Nick Marriner, Kazuyo Tachikawa, Frauke Rostek, Rik Tjallingii, Hamid Lahijani, Mahboubeh Molavi Arabshahi, Marta Garcia, Laetitia Licari, Martin Tetard, Marie-Charlotte Bellinghery, Edouard Bard
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引用次数: 0

摘要

波斯湾(PG)的冰川后洪水对该地区人类历史的形成和地貌变化具有重要影响。然而,有关冰期后横断面的数据却十分匮乏。波斯湾位于印度洋夏季季风(IOSM)和中纬度西风(MLW)等主要同步系统的边缘,这使得其环境对全新世气候变迁尤为敏感。为了研究洪水泛滥的时间,并探测全新世期间重大气候变迁对区域环境的影响,对来自 PG 两个深部地点的三个短沉积物岩芯进行了多代研究。对岩心进行了沉积学、古生物学和地球化学分析。研究结果表明,PG 西部地区的淹没始于约 11.5 ka bp,并以 10.4 和 9.2 ka cal bp 为中心连续经历了几个显著的横断阶段,并在 8.8 ka cal bp 左右形成了明确的海洋条件。在大约 9 至大约 6.3 ka cal bp 之前,IOSM 一直是该地区的主导系统。此后,IOSM 的强度下降,MLW 在大约 6.3 ka cal bp 之后成为该地区的主导。这些气候转变引起了该地区植被和水文的重大变化,并可能引发了社会文化的转型。
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Postglacial flooding and Holocene climate shifts in the Persian Gulf

Postglacial flooding of the Persian Gulf (PG) was important in shaping human history and driving landscape changes in the region. However, there is a paucity of data regarding the postglacial transgression. The position of the PG at the edge of major synoptic systems of the Indian Ocean Summer Monsoon (IOSM) and Mid-latitude Westerlies (MLW) makes the environment particularly sensitive to Holocene climate shifts. To investigate the timing of the flooding and to detect the impacts of significant climate shifts on the regional environment during the Holocene, a multiproxy study was conducted on three short sediment cores from two deep sites in the PG. Sedimentological, palynological and geochemical analyses were performed on the cores. The results show that inundation of the western part of the PG that started from ca. 11.5 ka bp continued with successive prominent phases of transgression centered on 10.4 and 9.2 ka cal  bp, and definitive marine conditions were established around 8.8 ka cal  bp. The IOSM was the dominant system in the region until about 9 to ~6.3 ka cal  bp. After that time, the intensity of the IOSM declined, as MLW dominated the region after ~6.3 ka cal  bp. These climatic shifts induced significant changes in regional vegetation and hydrology, and possibly triggered socio-cultural transformations.

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来源期刊
Journal of Quaternary Science
Journal of Quaternary Science 地学-地球科学综合
CiteScore
4.70
自引率
8.70%
发文量
82
审稿时长
6-12 weeks
期刊介绍: The Journal of Quaternary Science publishes original papers on any field of Quaternary research, and aims to promote a wider appreciation and deeper understanding of the earth''s history during the last 2.58 million years. Papers from a wide range of disciplines appear in JQS including, for example, Archaeology, Botany, Climatology, Geochemistry, Geochronology, Geology, Geomorphology, Geophysics, Glaciology, Limnology, Oceanography, Palaeoceanography, Palaeoclimatology, Palaeoecology, Palaeontology, Soil Science and Zoology. The journal particularly welcomes papers reporting the results of interdisciplinary or multidisciplinary research which are of wide international interest to Quaternary scientists. Short communications and correspondence relating to views and information contained in JQS may also be considered for publication.
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