北半球冬季大尺度瞬变大气波的出现

IF 4.6 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Itamar Karbi, Rei Chemke
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引用次数: 0

摘要

在北半球冬季,调制中纬度风暴路径的瞬态大气波预计将在大部分中纬度地区加强,但仅在欧亚大陆地区出现内部变率,这意味着该地区的局部气候变化影响。然而,这种评估汇总了波浪的不同长度尺度,因此没有考虑到不同尺度上可能存在的不同波浪响应。在这里,通过大尺度和小尺度的分离,我们发现在整个中纬度地区,大尺度北方冬季瞬变大气波在21世纪的内部变率中被预估为增强和出现。在北美、北大西洋和北太平洋,当汇集所有尺度时,预测的小尺度海浪减弱掩盖了海浪的出现。我们的分析进一步表明,瞬态大气波的区域依赖性变化与北极区域变暖模式有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Emergence of Winter Large-Scale Transient Atmospheric Waves in the Northern Hemisphere

Emergence of Winter Large-Scale Transient Atmospheric Waves in the Northern Hemisphere

Emergence of Winter Large-Scale Transient Atmospheric Waves in the Northern Hemisphere

Emergence of Winter Large-Scale Transient Atmospheric Waves in the Northern Hemisphere

Emergence of Winter Large-Scale Transient Atmospheric Waves in the Northern Hemisphere

Transient atmospheric waves, which modulate the mid-latitude storm tracks, are projected to intensify over most of the mid-latitudes in Northern Hemisphere winter, but to emerge out of the internal variability only over Eurasia, implying localized climate change impacts over this region. This assessment, however, aggregates different length scales of the waves, thus not accounting for possible different wave responses over various scales. Here, by separating large and small scales, we find that throughout the mid-latitudes large-scale boreal winter transient atmospheric waves are projected to intensify and emerge from the internal variability over the 21st century. In North America, the North Atlantic and the North Pacific, it is the projected weakening of small-scale waves that obscures the emergence of the waves when pooling together all scales. Our analysis further suggests that the region-dependent changes in transient atmospheric waves are linked to the regional Arctic warming patterns.

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来源期刊
Geophysical Research Letters
Geophysical Research Letters 地学-地球科学综合
CiteScore
9.00
自引率
9.60%
发文量
1588
审稿时长
2.2 months
期刊介绍: Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.
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