21世纪在南极海洋保护区发生严重的海洋酸化
Cara Nissen1,2, Nicole S Lovenduski3, Cassandra M Brooks4
1Department of Atmospheric and Oceanic Sciences and Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, USA. cara.nissen@colorado.edu.
Nature communications
|January 4, 2024
概括
海洋酸化威胁着南极海洋保护区 (MPAs). 预测显示,到2100年,pH值显著下降和阿拉戈尼特不和,需要减排和MPA扩张.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
背景情况:
- 南极沿岸水域在海洋保护区 (MPA) 中拥有丰富的生物多样性.
- 这些重要的生态系统面临着气候变化,特别是海洋酸化 (OA) 的威胁.
- 关于OA在这些地区的未来范围和影响的不确定性仍然存在.
研究的目的:
- 在各种排放场景下,在南极海洋保护区预测未来的海洋酸化.
- 评估OA对这些保护区内阿拉贡石和度状态的潜在影响.
- 为南极海洋生态系统的保护和管理战略提供信息.
主要方法:
- 使用了高分辨率的海洋-海冰-生物地质化学模型.
- 整合了现实的冰架几何,以提高准确性.
- 在四个不同的排放场景下模拟了21世纪的OA预测.
主要成果:
- 预计到2100年,在上层200米的pH值将降低至0.36,达到0.36.
- 由于人为碳的垂直混合,在整个水柱中观察到严重的OA.
- 在三个最高排放场景下发现了无处不在的阿拉贡石不和.
结论:
- 到2100年,南极海洋保护区将面临严重的海洋酸化,特别是在高排放场景下.
- 调查结果强调迫切需要强有力的减排战略.
- 建议包括扩大和延续南极保护区,以减少累积生态系统压力.
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