增加的海冰融化是北极植物浮游生物开花的驱动力
Andrew P Castagno1, Till J W Wagner1,2, Mattias R Cape3,4
1University of North Carolina Wilmington, Wilmington, North Carolina, USA.
Global change biology
|June 19, 2023
概括
北极植物浮游生物的开花正在增加. 弗拉姆海峡2019年创纪录的开花与海冰融水,温度升高和分层增加有关,这突显了气候变化对北极初级生产的影响.
科学领域:
- 海洋学 海洋学 海洋学
- 海洋生物学 海洋生物学
- 气候科学 气候科学
背景情况:
- 北冰洋植物浮游生物的初级生产显示了二十年来不断增长的趋势.
- 在2019年,弗拉姆海峡发生了创纪录的春季植物浮游生物开花,其中有一个早期和大的叶绿素峰值.
研究的目的:
- 调查2019年春季在弗拉姆海峡创纪录的植物浮游生物开花的条件和驱动因素.
- 为了分析海冰融水,分层和甲度在过去20年的关系.
主要方法:
- 利用现场测量,遥感数据和数据同化技术.
- 分析了海冰融水,海面温度和叶绿素和颜料度.
- 研究了长期 (20年) 趋势和空间相关性.
主要成果:
- 在2019年开花期间,观察到海冰融水和叶绿素a度之间存在直接关系.
- 海冰的增加和更高的表面温度导致了更高的融化水输入和分层.
- 在过去二十年中,增加的叶绿素a和海冰融化的淡水流之间存在显著的空间相关性.
结论:
- 海冰融水是推动弗拉姆海峡早期和强烈植物浮游生物繁荣的关键因素.
- 气候变化,体现在温度升高和海冰动态变化,正在加剧北极浮游生物的生长.
- 这些发现强调了北极海洋生态系统对持续的气候变化的敏感性.
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