Australia's unique influence on global sea level in 2010-2011
Australia's unique influence on global sea level in 2010-2011
复制标题
DOI：
10.1002/grl.50834
复制
发表时间：
2013-08-28
影响因子：
5.2
通讯作者：
Nerem, R. Steven
中科院分区：
文献类型：
--
作者：
Fasullo, John T.;Boening, Carmen;Nerem, R. Steven
2011年，全球海平面发生了在高度计时代前所未有的大幅下降，同时发生了异常强烈的拉尼娜现象。这项分析检查了多个数据集，以探索下降的异常强度和持久性的物理基础。澳大利亚的水文表面质量异常被证明是2011年全球总量的主要贡献者，相关的降水异常是有记录以来最高的。澳大利亚质量异常的持续性归因于该大陆独特的地表水文，其中包括阻止径流进入海洋的广阔的非流和内陆盆地。基于澳大利亚的关键作用，海平面变化的归因处理。印度洋偶极子和南半球环状模态对拉尼娜遥相关的调制影响被认为是大陆内部异常降水以及相关表面质量和海平面响应的关键驱动因素。
In 2011, a significant drop in global sea level occurred that was unprecedented in the altimeter era and concurrent with an exceptionally strong La Nina. This analysis examines multiple data sets in exploring the physical basis for the drop's exceptional intensity and persistence. Australia's hydrologic surface mass anomaly is shown to have been a dominant contributor to the 2011 global total, and associated precipitation anomalies were among the highest on record. The persistence of Australia's mass anomaly is attributed to the continent's unique surface hydrology, which includes expansive arheic and endorheic basins that impede runoff to ocean. Based on Australia's key role, attribution of sea level variability is addressed. The modulating influences of the Indian Ocean Dipole and Southern Annular Mode on La Nina teleconnections are found to be key drivers of anomalous precipitation in the continent's interior and the associated surface mass and sea level responses.