Decadal climate variability of the North Sea during the last millennium reconstructed from bivalve shells (Arctica islandica)
Decadal climate variability of the North Sea during the last millennium reconstructed from bivalve shells (Arctica islandica)
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DOI：
10.1177/0959683614530438
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
Hilmar A. Holland;B. Schöne;Constanze Lipowsky;J. Esper
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文献类型：
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作者：
Hilmar A. Holland;B. Schöne;Constanze Lipowsky;J. Esper
不间断的，每年解决的古气候记录是至关重要的背景下，目前的全球变化。这些信息对于欧洲领域尤其重要，因为欧洲的天气和气候预测即使不是几乎不可能，也仍然非常具有挑战性。这项研究提出了第一个精确的日期，每年解决，多区域北极islandica年表从北海，涵盖了公元1040-2010年的时间间隔，并包含重要信息的超区域气候条件（海表温度（SST），海洋生产力，风应力）。贝壳的生长在3-8年、12-16年、28-36年、50-80年和120-240年的时间尺度上呈周期性变化，这可能表明与北大西洋涛动、由海洋-大气耦合控制的北大西洋海洋-内部循环以及大西洋多年代际涛动有密切的联系。气候不稳定性的增加，即准十年变率的增强，似乎与大气强迫的优势和一些显著减少的日照阶段（例如Spörer和Maunder Minima）有关。在一些特别温暖的阶段或政权转变期间（例如在“中世纪气候异常”期间和自c. 1970年）。然而，更稳定的气候条件，即延长的温暖或寒冷时期（“中世纪气候异常”，“小冰期”），与数十年海洋周期的优势一起下降。太阳黑子数量和更高频率的气候变率是否存在因果关系，以及需要哪些过程和机制，都超出了本研究的范围。
Uninterrupted, annually resolved paleoclimate records are crucial to contextualize the current global change. Such information is particularly relevant for the Europe realm for which weather and climate projections are still very challenging if not virtually impossible. This study presents the first precisely dated, annually resolved, multiregional Arctica islandica chronologies from the North Sea which cover the time interval ad 1040–2010 and contain important information on supra-regional climatic conditions (sea surface temperature (SST), ocean productivity, wind stress). Shell growth varied periodically on timescales of 3–8, 12–16, 28–36, 50–80, and 120–240 years, possibly indicating a close association with the North Atlantic Oscillation, ocean-internal cycles of the North Atlantic controlled by ocean–atmosphere couplings, and the Atlantic Multi-Decadal Oscillation. Increased climatic instability, that is, stronger quasi-decadal variability, seems to be linked to the predominance of atmospheric forcings and some significantly decreased insolation phases (e.g. Spörer and Maunder Minima). Increased climatic variability of shorter timescales was also observed during some particularly warm phases or regime shifts (e.g. during the ‘Medieval Climate Anomaly’ and since c. 1970). More stable climatic conditions, that is, extended warm or cold periods (‘Medieval Climate Anomaly’, ‘Little Ice Age’), however, fell together with a predominance of multi-decadal oceanic cycles. Whether the sunspot number and the higher frequency climate variability are causally linked and which processes and mechanisms are required lie beyond this study.