Minimum winter temperature reconstruction from average earlywood vessel area of European oak (Quercus robur) in N-Poland
Minimum winter temperature reconstruction from average earlywood vessel area of European oak (Quercus robur) in N-Poland
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DOI：
10.1016/j.palaeo.2016.02.046
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发表时间：
2016-05
期刊：
影响因子：
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通讯作者：
C. Pritzkow;T. Ważny;K. Heussner;M. Słowiński;Anne Bieber;I. D. Liñán;G. Helle;I. Heinrich
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文献类型：
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作者：
C. Pritzkow;T. Ważny;K. Heussner;M. Słowiński;Anne Bieber;I. D. Liñán;G. Helle;I. Heinrich
基于树木年轮的温度重建构成了国际代用数据库的重要组成部分，该数据库用于检查和模拟上个千年的全球气候变化。然而，大多数基于树木年轮的重建是来自高纬度或高海拔的研究地点，很少关注低海拔地点。因此，在气候重建的地理覆盖范围从温带低海拔地区在中欧仍然存在很大的差距。这促使我们将精力集中在波兰北部的欧洲橡木（Quercus robur）上。我们开发了一个新的强大的树轮宽度年表（TRW），以及四个木材解剖年表（如平均导管面积和导管数量）从Q。1810年至2010年期间。年表的气候响应进行了检查。虽然TRW被发现有弱的相关性与气候，早材容器参数（EVP），特别是平均容器面积（AVA），揭示了显着的正相关性，冬季最低温度。基于稳定的气候增长的相关性，重建的最低冬季温度（11月29日至1月20日）回到1810年波兰北部。重建表明，一个有前途的潜力，揭示低频气候信息。另一项极端年份分析表明，在寒冷的冬季，最低温度的冷-暖-冷模式是造成早期木材船只相对较小的原因。空间场的相关性意味着我们的重建是更多的欧洲东部的温度变化。重建的温度与两个现有的温度重建，特别是在大多数的20世纪世纪，即使温度重建不同的空间和时间。基于这些发现，该地区相对广泛的考古橡木材料资源可能有助于在温带气候区进行数百年的气候重建。
Tree-ring-based temperature reconstructions form a substantial part of the international proxy data base used to examine and model global climate variations of the last Millennium. However, most tree-ring-based reconstructions are derived from study sites in the high latitudes or high altitudes, paying very little attention to low elevation sites. Thus, a large gap in the geographical coverage of climate reconstructions from temperate low elevation sites in central Europe still exists. This motivated us to concentrate our efforts on the European oak (Quercus robur) in N-Poland. We developed a new robust tree-ring width chronology (TRW), as well as four wood anatomical chronologies (e.g. average vessel area and number of vessels) fromQ. roburfor the period 1810 to 2010. The chronologies were examined for their climatological responses. While TRW was found to have weak correlations with climate, the earlywood vessel parameters (EVP), especially average vessel area (AVA), revealed significant positive correlations to minimum winter temperatures. Based on stable climate–growth correlations, a reconstruction of minimum winter temperatures (29th November to 20th January) back to 1810 was performed for north Poland. The reconstruction indicates a promising potential to reveal low-frequency climate information. An additional extreme year analysis suggested that in cold winters, a cold–warm–cold pattern in the minimum temperatures was responsible for the relatively small earlywood vessels. Spatial field correlations imply that our reconstruction is more related to temperature variations towards the east of Europe. The reconstructed temperature compared well with two existing temperature reconstructions, especially during most of the 20th century, even though the temperature reconstructions differ spatially and temporally. Based on these findings, the relatively extensive resource of archeological oak material from this region may be useful to perform multicentennial climate reconstructions in the temperate climate zone.