控制海洋循环引起的磁场的物理海洋学因素控制海洋循环引起的磁场
David S Trossman1, Robert H Tyler2, Helen R Pillar3
1Cooperative Institute for Satellite Earth System Studies (CISESS)/Earth System Science Interdisciplinary Center (ESSIC), University of Maryland, College Park, MD, USA.
概括
海洋导电量含量 (OCC) 和速度数据对于计算海洋循环诱导磁场 (OCIMF) 是至关重要的. 这项研究使用海洋状态估计来计算OCIMF,揭示了受海洋变暖和外部强迫影响的趋势.
科学领域:
- 地质物理学 地质物理学
- 海洋学 海洋学 海洋学
- 电磁主义 电磁主义
背景情况:
- 海洋热量含量监测对于了解地球的能量不平衡至关重要.
- 准确的海洋一般循环模型需要巴罗临床特性.
- 海洋导电量含量 (OCC) 和深度集成导电量加权速度 ([公式:见文本]) 是关键参数.
研究的目的:
- 为了计算海洋循环诱导磁场 (OCIMF) 使用海洋状态估计由于缺乏直接的观测.
- 分析1993年至2017年间OCIMF的发展趋势.
- 评估OCC和[公式:参见文本]数据在限制海洋循环和混合参数方面的潜力.
主要方法:
- 利用海洋状态估计来计算OCIMF.
- 分析了OCIMF,OCC和[公式:参见文本]数据中的趋势.
- 研究了OCC和[公式:参见文本]在海洋状态估计框架中的同化.
主要成果:
- 在OCIMF中观察到显著的趋势,主要是由速度对外部强迫和OCC变暖的反应驱动的.
- 这些趋势在1993年至2017年期间在南大洋特别明显.
- 深度集成的OCC和[公式:参见文本]可以显著限制巴罗临床速度和海洋混合参数.
结论:
- 该研究强调了OCC和[公式:参见文本]对于改进海洋循环模型和OCIMF计算的重要性.
- 假设一批能够使用电磁波的浮标可以提高OCIMF的准确性.
- 这些发现为从卫星磁力测量数据中提取OCIMF提供了指导.
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