大陆淡水排放影响了世界大型三角洲附近的海面盐度变化
Fahad K Khadim1, Augusto Getirana1,2, Rajat Bindlish1
1Hydrological Sciences Lab, NASA Goddard Space Flight Center, Greenbelt, MD 20771.
概括
全球河流排放对大三角洲附近的海洋盐度产生重大影响. 增加的溪流流量降低了海面盐度,特别是在全球的大型,热带和河流影响的三角洲.
科学领域:
- 海洋学 海洋学 海洋学
- 水文学的水文学
- 气候科学 气候科学
背景情况:
- 海洋表面盐度 (SSS) 对于海洋热盐循环至关重要.
- 大三角洲是河流淡水影响海洋盐度的关键区域.
- 需要对流量流量对SSS波动性的影响进行全球量化.
研究的目的:
- 全球量化海洋表面盐度和内陆流量在48个大三角洲之间的统计关联.
- 确定调节淡水排放对SSS的影响的因素.
主要方法:
- 利用遥感和观察驱动的数据集.
- 分析了全球48个大三角洲的SSS和流量之间的统计关联.
- 检查了季节性和季节性数据以评估相关性.
主要成果:
- 在大多数大三角洲中,在SSS和流量之间发现了强有力的负相关性.
- 在26/48的大三角洲的季节性数据中,相关系数低于-0.5,在21/48的大三角洲的季节性数据中,相关系数低于-0.3.
- 在大型,热带和受河流影响的三角洲中,反相对比较强.
结论:
- 内陆流动是海面盐度变化的主要驱动因素,大三角洲附近的海面盐度变化.
- 气候,三角洲形态和分层显著影响淡水排放效应.
- 了解这些联系对于全球海洋和气候循环研究至关重要.
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