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- W3031004097 abstract "长时间尺度气候变化的定量重建结果可为理解气候自然变率及其机制提供参考, 并为气候模拟提供边界条件与验证. 然而, 由于已有定量重建方法体系并不完善, 许多重建结果的可信度存在很大不确定性. 本研究建立了一个基于高质量现代孢粉数据库的定量重建方法体系: 包括现代孢粉数据筛选、训练集选择、主控气候因子分析、最优模型建立、评估检验和生态解释等多个步骤. 将该方法体系应用于青藏高原东部若尔盖盆地的三个高分辨率孢粉记录, 定量重建了研究区全新世温度变化. 结果表明, 全新世早期最暖月温度(MTwa)约为10.4℃, 随后温度逐步升高, 在8.5~6ka BP达到全新世最高(约11℃). 经历了早、中全新世的温暖气候后, 温度持续降低1.2℃, 在新冰期期间达到全新世温度最低值. 除全新世整体变冷趋势外, MTwa还具有明显的500年周期波动, 其信号强度随时间有所波动. 温度的高(低)值与太阳活动的最大值(最小值)同相位变化, 这表明青藏高原东部地区百年尺度气候波动很可能受到了太阳活动的影响." @default.
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- W3031004097 date "2020-04-24" @default.
- W3031004097 modified "2023-09-24" @default.
- W3031004097 title "孢粉<bold>-</bold>气候定量重建方法体系的建立及其应用——以青藏高原东部全新世温度重建为例" @default.
- W3031004097 doi "https://doi.org/10.1360/n072019-0180" @default.
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