Measuring Global Mean Sea Level Changes With Surface Drifting Buoys
Measuring Global Mean Sea Level Changes With Surface Drifting Buoys
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DOI：
10.1029/2020gl091078
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发表时间：
2019-09
影响因子：
5.2
通讯作者：
S. Elipot
中科院分区：
文献类型：
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作者：
S. Elipot
结合海洋模型数据和现场拉格朗日数据，我表明，由全球导航卫星系统(GNSS)，如全球漂移方案跟踪的一组表面漂移浮标可以提供全球平均海平面及其变化的估计，包括线性年代际趋势。对于一个由1,250个全球分布的浮标组成的标准化设计的持续阵列，我证明了GMSL十年线性趋势估计的不确定度小于0.3 mm yr−1，垂直方向上全球导航卫星系统的每日随机误差为1.6米或更小。这一演示假设可以从漂流浮标获得受控的垂直位置测量，这一点尚未得到证实。这种测量的开发和实施最终可以提供一个独立和有弹性的观测系统，以推断自然和人为的海平面变化，加强目前的验潮仪和卫星记录。
Combining ocean model data and in situ Lagrangian data, I show that an array of surface drifting buoys tracked by a Global Navigation Satellite System (GNSS), such as the Global Drifter Program, could provide estimates of global mean sea level (GMSL) and its changes, including linear decadal trends. For a sustained array of 1,250 globally distributed buoys with a standardized design, I demonstrate that GMSL decadal linear trend estimates with an uncertainty less than 0.3 mm yr−1 could be achieved with GNSS daily random error of 1.6 m or less in the vertical direction. This demonstration assumes that controlled vertical position measurements could be acquired from drifting buoys, which is yet to be demonstrated. Development and implementation of such measurements could ultimately provide an independent and resilient observational system to infer natural and anthropogenic sea level changes, augmenting the ongoing tide gauge and satellites records.