自然海洋铁肥和气候在地质时期的变化
Hai-Bo Jiang1,2,3, David A Hutchins4, Wentao Ma2
1Key Laboratory of Marine Biotechnology of Zhejiang Province, School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, China.
Global change biology
|October 19, 2023
概括
铁的可用性影响了海洋的初级生产力和二氧化碳 (CO2) 捕获. 这篇评论探讨了铁的研究.
科学领域:
- 海洋科学 海洋科学
- 古气候学 古气候学
- 生物地质化学生物地质化学
背景情况:
- 对于气候调节至关重要的海洋初级生产者,往往受到铁的可用性限制.
- 铁的供应对生物碳和大气中二氧化碳的封存有重大影响.
- 铁和海洋生物之间的关系因气候和环境的变化而在地质时间尺度上有所不同.
研究的目的:
- 在不同地质时期对铁在海洋初级生产中的作用进行审查.
- 在不同的古代气候场景中评估铁假设的有效性.
- 为气候调节提供关于海洋铁化肥的见解.
主要方法:
- 关于海洋初级生产率,铁的生物可用性和海洋条件的文献综述.
- 从大氧化事件,雪球地球,纪冰川 - 间冰川周期和全新纪的地质记录的分析.
- 铁,气候和海洋生产力之间的趋势的比较评估.
主要成果:
- 铁假设,将铁供应与海洋生产力和二氧化碳吸收联系起来,与冰川 - 冰川间周期保持一致.
- 在大氧化事件和雪球地球时期,观察到的铁的生物可用性和气候趋势与铁假说相矛盾.
- 在这些古代时期,铁的可用性和气候发生了显著的变化.
结论:
- 铁假设在所有地质时期并不普遍适用.
- 了解过去的铁气候生产力动态是评估未来海洋铁化肥战略的关键.
- 海洋铁化肥对二氧化碳去除和气候调节的影响需要细致的,特定时期的评估.
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