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首页> 外文期刊>Journal of quaternary science: JQS >Quantitative palaeotemperature estimates based on fossil chydorid ephippia: calibration and validation of a novel method for northern lakes
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Quantitative palaeotemperature estimates based on fossil chydorid ephippia: calibration and validation of a novel method for northern lakes

机译：基于化石chydorid ephippia的定量古温度估计：北部湖泊的一种新方法的校准和验证

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摘要

To fully utilize palaeolimnological archives for tracking past environmental changes, methodological advances are necessary. We present a novel method to quantitatively reconstruct past summer air temperatures based on fossil chydorid (Cladocera: Chydoridae) ephippia assemblages. We examined a 76-lake training set from Finland for chydorid ephippia distribution to develop a transfer function for summer air temperatures. Subsequently, we tested its usability in downcore reconstructions by inferring Holocene temperatures from Lake Arapisto in southern Finland. Significant climate-related variation was found in the distribution and abundance of chydorid ephippia in the training set. A transfer function for palaeotemperature reconstructions was developed using the partial least squares technique, which showed favourable performance statistics, enabling the test use of the model in a downcore reconstruction. The ephippia assemblages were responding to the Holocene climate development in the Lake Arapisto core. The ephippium-inferred temperatures correlated closely with the previously available independent palaeoclimate data from Lake Arapisto and from an adjacent lake, although the early Holocene samples had poor modern analogues in the training set. The use of fossil chydorid ephippia in palaeoclimatological reconstructions is a promising tool and it can contribute as a valuable addition for multiproxy assessments of past climate changes. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译：为了充分利用古脂学档案来跟踪过去的环境变化，方法学的进步是必要的。我们提出了一种新的方法来定量重建基于化石chydorid（Cladocera：Chydoridae）ephippia组合的夏季夏季气温。我们检查了一个来自芬兰的76个湖的训练场，以了解蛇嘴兽以弗匹的分布情况，以开发夏季气温的传递函数。随后，我们通过推断芬兰南部Arapisto湖的全新世温度来测试其在下层重建中的可用性。在训练组中，硬鳞蝇属的分布和数量都发现了与气候有关的显着变化。使用偏最小二乘技术开发了古温度重建的传递函数，该函数显示出良好的性能统计数据，使得该模型可以在下层重建中进行测试使用。 ephippia的组织正在响应Arapisto湖中心全新世的气候发展。 eph推断的温度与Arapisto湖和邻近湖的先前可获得的独立古气候数据密切相关，尽管早期全新世样本在训练集中具有较差的现代类似物。在古气候重建中使用化石鳞甲鱼类化石是一种很有前途的工具，它可以为过去气候变化的多代理评估提供有价值的补充。版权所有（c）2015 John Wiley＆Sons，Ltd.

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