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首页> 外文期刊>GFF >Hot summers ahead? Multi-decadal spring season warming precedes sudden summer temperature rise in pre-anthropogenic climate change
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Hot summers ahead? Multi-decadal spring season warming precedes sudden summer temperature rise in pre-anthropogenic climate change

机译：炎热的夏天前进？ 多层春季变暖前期突然夏季温度升高，预期气候变化

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摘要

Waning annual seasonality is documented in an up to one-month advance in spring onset since the 1980?s in northern latitudes, perturbing ecosystems and socio-economic performance. Summer temperatures, in contrast, have been rising only recently, indicating an offset in seasonal warming. The limited time span of this observational data makes the asynchronous pattern difficult to quantify, hindering projections of intra-annual dynamics. We explore temporal phase relations of seasonal warming over the Late Pleniglacial/B?lling and the Younger Dryas/Holocene climate transitions that preceded present anthropogenic warming. We determine past spring onset and thermal properties from dwarf birch paleo-phenology. Reconstructed spring warming led maximum summer warming by about a century during both transitions. Long-term reconstruction of intra-annual temperature regimes provides the perspective required for seasonal response analysis. Our results document that multi-decadal spring season warming precedes sudden summer temperature rise also during natural climate change. The rapidity of present seasonality changes, however, is unprecedented.
机译：自1980年以来，在北纬，春季发病的春季发病中持续为期一年的季节性，扰乱了生态系统和社会经济绩效。相比之下，夏季气温最近一直在上升，表明季节变暖的抵消。该观察数据的有限时间跨度使异步模式难以量化，妨碍年度动态的投影。我们探讨了在晚期Pleniglacial / B中的季节性变暖的时间相位关系，以及前面的人为升温的年轻Dryas /全新世气候转变。我们确定过去矮小的春季发病和热性质从矮小的桦木古候选。重建春季变暖LED在两种过渡期间大约一个世纪的最大夏季变暖。年度内部温度制度的长期重建提供了季节性反应分析所需的视角。我们的成绩证明，在自然气候变化过程中，多层春季变暖的温暖突然夏季温度升高。然而，目前的季节性变化的速度是前所未有的。

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