High‐resolution stratigraphy of the northernmost concentric raised bog in Europe: Sellevollmyra, Andøya, northern Norway
High‐resolution stratigraphy of the northernmost concentric raised bog in Europe: Sellevollmyra, Andøya, northern Norway
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欧洲最北端同心凸起沼泽的高分辨率地层学：挪威北部安岛塞勒沃尔米拉
DOI：
10.1111/j.1502-3885.2007.tb01249.x
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发表时间：
2007
期刊：
影响因子：
2.2
通讯作者：
C. Jensen
中科院分区：
文献类型：
--
作者：
Karl‐Dag Vorren;M. Blaauw;S. Wastegård;J. Plicht;C. Jensen
在挪威北方Andøya的Sellevollmyra沼泽，一个440厘米长的泥炭芯覆盖了最后一个c。对7000个日历年的腐殖化作用、烧失量、微体化石、大型化石和火山灰进行了检查。年龄模型基于35个14 C日期和两个历史锚定火山灰层的贝叶斯摆动匹配。根据岩性和生物地层气候代用指标的变化，确定了几种气候变化（斜体字为最根本性变化的时期）：6410-6380、6230-6050、5730-5640、5470-5430、5340-5310、5270-5100、4790-4710、4890-4820、4380-4320、4220-4120、4000-3810、3610-3580、3370-3340（区域2850-2750;在Sellevollmyra一个间断之间2960-2520），2330-2220，1950，1530-1450，1150-840，730？和c.六百？校准年BP这些气候变化中的大多数是通过对北方和中欧不同古气候代用指标的其他调查而知道的。一些火山爆发似乎与泥炭中记录的植被变化相吻合，例如大约5760 cal. yr BP;然而，已知的Hekla‐4火山灰层的气候恶化在火山爆发事件发生前几十年就开始了。
From the Sellevollmyra bog at Andøya, northern Norway, a 440‐cm long peat core covering the last c. 7000 calendar years was examined for humification, loss‐on‐ignition, microfossils, macrofossils and tephra. The age model was based on a Bayesian wiggle‐match of 35 14C dates and two historically anchored tephra layers. Based on changes in lithology and biostratigraphical climate proxies, several climatic changes were identified (periods of the most fundamental changes in italics): 6410–6380, 6230–6050, 5730–5640, 5470–5430, 5340–5310, 5270–5100, 4790–4710, 4890–4820, 4380–4320, 4220–4120, 4000–3810, 3610–3580, 3370–3340 (regionally 2850–2750; in Sellevollmyra a hiatus between 2960–2520), 2330–2220, 1950, 1530–1450, 1150–840, 730? and c. 600? cal. yr BP. Most of these climate changes are known from other investigations of different palaeoclimate proxies in northern and middle Europe. Some volcanic eruptions seemingly coincide with vegetation changes recorded in the peat, e.g. about 5760 cal. yr BP; however, the known climatic deterioration at the time of the Hekla‐4 tephra layer started some decades before the eruption event.