Monitoring Terrestrial Water Storage, Drought and Seasonal Changes in Central Oklahoma With Ambient Seismic Noise
Monitoring Terrestrial Water Storage, Drought and Seasonal Changes in Central Oklahoma With Ambient Seismic Noise
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DOI：
10.1029/2023gl103419
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发表时间：
2023-09
影响因子：
5.2
通讯作者：
Shuo Zhang;Bingxu Luo;Y. Ben‐Zion;David E. Lumley;Hejun Zhu
中科院分区：
文献类型：
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作者：
Shuo Zhang;Bingxu Luo;Y. Ben‐Zion;David E. Lumley;Hejun Zhu
由于气候变化，在世界各地观察到陆地水储存的严重不平衡和严重干旱。提高我们监测TWS和干旱的能力对于水资源管理和缺水估计至关重要。我们使用连续的地震环境噪声来监测2013年至2022年俄克拉荷马州中部近地表地震速度dv/v的时间演化。导出的dv/v被认为是负相关的重力测量和地下水的深度，显示地下水存储地震速度的影响。涉及干旱和地下水补给的水文效应发生在多年时间尺度上，并主导着整体推导的速度变化。大气温度变化的热弹性响应主要发生在一年的时间尺度上，并主导叠加的季节性速度变化在这项研究中。干旱的发生与dv/v的局部峰值同时出现，表明近地表地震速度对干旱的敏感性。
Significant imbalances in terrestrial water storage (TWS) and severe drought have been observed around the world as a consequence of climate changes. Improving our ability to monitor TWS and drought is critical for water‐resource management and water‐deficit estimation. We use continuous seismic ambient noise to monitor temporal evolution of near‐surface seismic velocity, dv/v, in central Oklahoma from 2013 to 2022. The derived dv/v is found to be negatively correlated with gravitational measurements and groundwater depths, showing the impact of groundwater storage on seismic velocities. The hydrological effects involving droughts and recharge of groundwater occur on a multi‐year time scale and dominate the overall derived velocity changes. The thermoelastic response to atmospheric temperature variations occurs primarily on a yearly timescale and dominates the superposed seasonal velocity changes in this study. The occurrences of droughts appear simultaneously with local peaks of dv/v, demonstrating the sensitivity of near‐surface seismic velocities to droughts.