在东方赤道太平洋海洋生物生产的海洋控制
1Department of Geology and Environmental Geosciences, Northern Illinois University, DeKalb 60115, USA. paul@geol.niu.edu
Nature
|August 22, 2000
概括
海洋循环和水化学,而不是大气变化,控制了赤道太平洋的新生物生产. 这一发现对于了解海洋二氧化碳 (CO2) 释放至关重要.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 古气候学 古气候学
背景情况:
- 东方赤道太平洋推动了全球重要的新生物生产和二氧化碳排放.
- 据信,由外部营养素为燃料的新生产可以调节二氧化碳的释放,但其控制因素仍然不清楚.
研究的目的:
- 在过去的13万年里,在赤道太平洋的表面海洋生物生产量化重建.
- 调查这个关键的海洋地区长期生物生产的主要驱动因素.
主要方法:
- 使用古海洋学代理的过去生物生产的定量重建.
- 生物生产记录与古气温数据的比较.
主要成果:
- 在赤道太平洋的生物生产显示出比南赤道流更高频率的变化.
- 大气机制,如铁沉积或风驱动的上升,似乎无法控制长期的生产率.
结论:
- 海洋循环模式和上游水的化学成分是控制东方赤道太平洋生物生产的主要因素.
- 这种理解对于预测海洋二氧化碳动态和气候反至关重要.
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