气候变化. 气候变化. 气候变化和沿海上游生态系统中的风力强化
W J Sydeman1, M García-Reyes2, D S Schoeman3
1Farallon Institute for Advanced Ecosystem Research, Suite Q, 101 H Street, Petaluma, CA 94952, USA. wsydeman@comcast.net.
Science (New York, N.Y.)
|July 5, 2014
概括
温室气体可能会加剧沿海风,支持安德鲁·巴昆1990年的假设. 对风力数据的元分析表明,主要上风系统的强化,与气候变化模式保持一致.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 环境科学 环境科学
背景情况:
- 安德鲁·巴昆 (Andrew Bakun) 1990年的假设提出,温室气体度上升将加剧东部边界电流系统中有利于上升的风.
- 东部边界电流系统对于海洋生态系统和全球气候调节至关重要.
- 关于当代风力趋势及其对Bakun假设的支持,目前仍在进行辩论.
研究的目的:
- 进行对上升有利风力强化的现有文献进行元分析.
- 为了确定当前的风力趋势是否支持或反驳巴昆的假设.
- 评估主要上游系统中风力变化的空间和度变化.
主要方法:
- 对已发表的关于上升有利风力趋势的研究进行了元分析.
- 综合了来自多个东部边界电流系统的数据,包括加利福尼亚,班格拉,洪堡,伊比利亚和加拿大群岛系统.
- 在长达60年的时间尺度上分析了风力数据.
主要成果:
- 大多数分析的研究表明,加利福尼亚州,班格拉和洪堡上游系统的风力加剧.
- 在伊比利亚上游系统中观察到风力减弱.
- 在加拿大群岛系统中风的变化被发现是模两可的,在更高的度处有更强的强化信号.
结论:
- 来自元分析的集体证据支持Bakun关于上游加剧的假设.
- 观察到的风力变化虽然微妙而变化,但与气候变化驱动的变暖模式是一致的.
- 这些发现突出了气候变化对关键海洋系统的复杂,空间变化的影响.
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