北太平洋的地下水变暖
Masao Fukasawa1, Howard Freeland, Ron Perkin
1Ocean Observation and Research Department, Japan Marine Science and Technology Centre, Yokosuka, 237-0061, Japan. fksw@jamstec.go.jp
Nature
|February 27, 2004
概括
北太平洋最深的海洋水域已经显著变暖,这表明即使在绝缘水体中也可以检测到变化. 这一发现对了解海洋循环和气候变化有重要意义.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 地质物理学 地质物理学
背景情况:
- 由于信号大小小,观察深海水域的变化具有挑战性.
- 深水性质的时间变化对于理解海洋运输和热环循环至关重要.
研究的目的:
- 为了比较来自1985年和1999年的深度北太平洋海洋学数据.
- 检测和分析整个北太平洋盆地深海水的特性变化.
主要方法:
- 利用了1985年进行的跨太平洋海洋调查的数据.
- 将这些历史数据与1999年的重复调查进行了比较.
- 分析了深水群体的温度和属性变化.
主要成果:
- 在北太平洋最深的水域检测到显著的变暖.
- 在海洋盆地的整个宽度上观察到的变暖.
- 深水性质的变化现在可以测量,即使在孤立的水体中也是如此.
结论:
- 深海变暖正在北太平洋地区发生,挑战了关于隔热的先前假设.
- 这些发现表明,在以前认为与大气影响隔离的水体上,有可检测的影响.
- 观察到的变化给海洋水运输和全球热环流的循环模式带来了新的约束.
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