Cool North European summers and possible links to explosive volcanic eruptions
Cool North European summers and possible links to explosive volcanic eruptions
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北欧夏季凉爽，可能与火山喷发有关
DOI：
10.1002/jgrd.50513
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Jones P
中科院分区：
文献类型：
--
作者：
Jones P
精确的树木年轮测量，如年轮宽度（TRW）和最大晚材密度（MXD），对夏季温度敏感，可以提供可能的途径来调查半球范围内凉爽夏季的发生，这可能与爆炸性的热带火山爆发有关。这些测量可以提供比仪器周期长得多的记录，从而能够评估更长的周期，并有可能看到比过去200年记录的更大的喷发。本文着眼于TRW证据从北方芬诺斯坎迪亚延伸到过去的7500年，使用两个独立制作的年表从北方瑞典和北方芬兰。TRW比MXD对凉爽的夏季温度的反应要慢，但MXD只在最近2000年才可用。此外，与北方平均值相比，观察相对较小的位置会增加相当大的噪声。这一领域的进展很可能是通过在北方高纬度地区开发更多千年之久的TRW系列，或者能够从亚化石材料中开发MXD系列，其中包括过去1000年之前的大部分样品。在过去的2000年里，该地区最极端的三个负值是1601年，542年和1837年，尽管后者在该地区的长期仪器记录中并不极端。最极端的一年发生在公元前330年。在20个最极端的负年中，9个发生在公元年，其余11个发生在之前的5500年。
Exactly dated tree‐ring measurements such as ring width (TRW) and maximum latewood density (MXD), which are sensitive to summer temperatures, can provide possible routes to investigate the occurrence of hemispheric‐wide cool summers that might be linked to explosive tropical volcanic eruptions. These measurements can provide much longer records than the instrumental period, enabling much longer periods to be assessed and offers the potential to look at much larger eruptions than recorded over the last 200 years. This paper looks at TRW evidence from Northern Fennoscandia extending over the last 7500 years, using two independently produced chronologies from northern Sweden and northern Finland. TRW is less responsive than MXD to cool summer temperatures, but MXD is only available for the last 2000 years. Additionally, looking at a relatively small location, compared to the Northern Hemisphere average, adds considerable noise. Progress in this area is likely to be made by developing more millennial‐long TRW series across northern high latitudes or being able to develop MXD series from the sub‐fossil material, which comprises most of the samples prior to the last 1000 years. The three most extreme negative values for the region for the last 2000 years are 1601, 542, and 1837, although the latter is not extreme in a long instrumental record for the region. The most extreme year of all occurred in 330BC. Of the 20 most extreme negative years, nine occurred during the AD years with the remaining 11 occurring during the prior 5500 years.
欧洲长期温度记录和北半球周围中高纬度树木年轮密度中观察到的地表气候对火山喷发的响应
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
P. Jones;A. Moberg;T. Osborn;K. Briffa
通讯作者：
K. Briffa
影响因子：
5.2
作者：
Miller, Gifford H.;Geirsdottir, Aslaug;Thordarson, Thorvaldur
通讯作者：
Thordarson, Thorvaldur