Reply to comment by Kawakatsu and Abe on “Nature of the seismic lithosphere‐asthenosphere boundary within normal oceanic mantle from high‐resolution receiver functions”
Reply to comment by Kawakatsu and Abe on “Nature of the seismic lithosphere‐asthenosphere boundary within normal oceanic mantle from high‐resolution receiver functions”
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回复川胜和阿部关于“来自高分辨率接收函数的正常洋地幔内地震岩石圈-软流圈边界的性质”的评论
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Karato
中科院分区：
文献类型：
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作者：
T. Olugboji;Jeffrey Park;S. Karato
Kawakatsu和Abe（2016）强调了沉积物混响对分析和解释地壳和地幔相位的潜在复杂影响，这些相位是从海底地震图分析的接收器函数推断出来的。在他们的评论中，他们在其中一个台站T06的功率谱中确定了共振峰，并通过合成建模证明了沉积物引起的共振如何导致恢复的接收器功能（RF）迹线的不稳定性。他们还要求详细解释如何进行LQT旋转，以及为什么在Olugboji等人的分析中使用它会导致稳定的接收器功能。我们欢迎这一查询，因为这是一个强调Olugboji et al.（2016）中使用的数据分析程序的某些技术方面的机会。我们的方法部分来自以前的研究，从海底地震数据估计的接收器功能，特别是使用模态波场分解（我们近似的LQT旋转），以抑制混响信号在上覆水柱的方法。
Kawakatsu and Abe (2016) have highlighted the potential complicating effect of sediment reverberations on the analysis and interpretation of crust and mantle phases inferred from receiver functions analyzed from ocean‐bottom seismograms. In their comment, they identify resonant peaks in the power spectrum at one of the stations, T06, and demonstrate with synthetic modeling how sediment‐induced resonances can cause instability in the recovered receiver‐function (RF) traces. They also request a detailed explanation of how LQT rotation is conducted, and why its use leads to stable receiver functions in the analysis of Olugboji et al. (2016). We welcome this query as an opportunity to highlight certain technical aspects of the data‐analysis procedures used in Olugboji et al. (2016). Our methods derive partly from methods recommended by previous studies of receiver functions estimated from seismic seafloor data, particularly the use of the modal wavefield decomposition (which we approximated by the LQT rotation) to suppress reverberation signals in the overlying water column.