globalchange  > 气候变化与战略
DOI: 10.5194/cp-12-849-2016
Scopus记录号: 2-s2.0-84966286517
论文题名:
Sea surface temperature variability in the central-western Mediterranean Sea during the last 2700 years: A multi-proxy and multi-record approach
作者: Cisneros M.; Cacho I.; Frigola J.; Canals M.; Masqué P.; Martrat B.; Casado M.; Grimalt J.O.; Pena L.D.; Margaritelli G.; Lirer F.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期:4
起始页码: 849
结束页码: 869
语种: 英语
Scopus关键词: climate change ; cooling ; data acquisition ; evaporation ; Holocene ; Little Ice Age ; Medieval Warm Period ; North Atlantic Oscillation ; planktonic foraminifera ; precipitation assessment ; proxy climate record ; reconstruction ; sea surface temperature ; seasonality ; temperature profile ; Atlantic Ocean ; Atlantic Ocean (North) ; Balearic Islands ; Mediterranean Sea ; Minorca ; Spain ; Globigerina bulloides
英文摘要: This study presents the reconstructed evolution of sea surface conditions in the central-western Mediterranean Sea during the late Holocene (2700 years) from a set of multi-proxy records as measured on five short sediment cores from two sites north of Minorca (cores MINMC06 and HER-MC-MR3). Sea surface temperatures (SSTs) from alkenones and Globigerina bulloides Mgĝ€/ĝ€Ca ratios are combined with Î 18O measurements in order to reconstruct changes in the regional evaporation-precipitation (E-P) balance. We also revisit the G. bulloides Mgĝ€/ĝ€Ca-SST calibration and re-adjusted it based on a set of core-top measurements from the western Mediterranean Sea. Modern regional oceanographic data indicate that Globigerina bulloides Mgĝ€/ĝ€Ca is mainly controlled by seasonal spring SST conditions, related to the April-May primary productivity bloom in the region. In contrast, the alkenone-SST signal represents an integration of the annual signal.

The construction of a robust chronological framework in the region allows for the synchronization of the different core sites and the construction of ĝ€œstackedĝ€? proxy records in order to identify the most significant climatic variability patterns. The warmest sustained period occurred during the Roman Period (RP), which was immediately followed by a general cooling trend interrupted by several centennial-scale oscillations. We propose that this general cooling trend could be controlled by changes in the annual mean insolation. Even though some particularly warm SST intervals took place during the Medieval Climate Anomaly (MCA), the Little Ice Age (LIA) was markedly unstable, with some very cold SST events mostly during its second half. Finally, proxy records for the last centuries suggest that relatively low E-P ratios and cold SSTs dominated during negative North Atlantic Oscillation (NAO) phases, although SSTs seem to present a positive connection with the Atlantic Multidecadal Oscillation (AMO) index. © Author(s) 2016.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49032
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Recommended Citation:
Cisneros M.,Cacho I.,Frigola J.,et al. Sea surface temperature variability in the central-western Mediterranean Sea during the last 2700 years: A multi-proxy and multi-record approach[J]. Climate of the Past,2016-01-01,12(4)
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