Surface soil pollen and climate in northern Xinjiang, China: Implications for paleoclimate reconstruction
Surface soil pollen and climate in northern Xinjiang, China: Implications for paleoclimate reconstruction
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DOI：
10.1016/j.palaeo.2023.111817
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发表时间：
2023-09
期刊：
影响因子：
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通讯作者：
Yun Zhang;Lixin Chen;Yuanyuan Li;Z. Kong
中科院分区：
文献类型：
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作者：
Yun Zhang;Lixin Chen;Yuanyuan Li;Z. Kong
基于区域尺度的表层土壤、花粉和气候记录的定量古气候重建被广泛用作研究过去气候变化的标准方法。采用排序和相关分析方法，探讨了新疆北部地区1900~3235m表层土壤中438个花粉样品的花粉类群分布与19个环境参数之间的定量关系。结果表明，年平均降水量、7月降水量、年平均气温、7月平均气温和年平均风速是影响表层花粉分布的主要环境因子；春风主要影响松属花粉的扩散和运移，说明外来花粉在表层花粉分布中起重要作用；青海松花粉在−5.1~1.2℃和MAP为212~459℃、MAP为212~459 mm的地点分布，其百分含量和浓度分别超过30%和30000粒/g。其百分含量和浓度分别超过50%和50,000粒/g和50%和10,000粒/g，主要分布在−1.9~9.1℃和145~416℃，−3.2~8.9℃和129~449 mm的地点，为古气候重建提供了准确的参考依据。这项研究提供了表层土壤花粉与气候记录之间关系的信息，可能有助于重建新疆历史气候，促进新疆生态建设，中国，并有助于预测未来气候趋势。
Quantitative paleoclimate reconstruction based on surface soil pollen and climate records on a regional scale is widely applied as a standard approach to investigating past climate changes. This study aimed to explore the quantitative relationships between the distribution of pollen taxa in 438 pollen samples from surface soils at altitudes ranging from 190 m to 3235 m and 19 environmental parameters in northern Xinjiang, China, using ordination and correlation analyses. The results showed that mean annual precipitation (MAP), precipitation in July, mean annual temperature (MAT), mean temperature in July and mean annual wind speed were the main environmental factors influencing the surface pollen distribution.Pinuspollen dispersal and transportation were primarily affected by spring wind, suggesting that exotic pollen played an essential role in surface pollen distribution.Piceapollen, with a percentage and concentration of over 30% and 30000 grains/g, was distributed at sites with MAT and MAP of −5.1–1.2 °C and 212–459 mm, respectively.Artemisiaand Chenopodiaceae, with percentages and concentrations of over 50% and 50,000 grains/g and 50% and 10,000 grains/g, respectively, were mainly distributed at sites with MAT and MAP of −1.9–9.1 °C and 145–416 mm, and −3.2–8.9 °C and 129–449 mm, respectively, providing an accurate reference for paleoclimates reconstruction. This study presents information regarding the relationship between surface soil pollen and climate records, which may contribute to the reconstruction of historical climates, promote ecological development in Xinjiang, China, and assist in predicting future climate trends.