Monitoring Soil Movement at the Jasper Ridge Biological Reserve, Woodside, CA

I propose to set up a PASSCAL seismic array, coupled with MEMS acoustic recorders, at 4 different sites in the Jasper Ridge Biological Reserve, managed by Stanford University, in order to detect and monitor Earth [sub]surface processes (e.g. bioturbation, soil creep) continuously over a period of ~6 months (December 2020 - May 2021) to better understand soil and biotic processes via real time monitoring through seismic and acoustic signals. This experiment is complementary to our previous work in San Diego and San Francisco, using PASSCAL seismic arrays to track soil movement, but has the added benefit of leveraging acoustic recordings from small MEMS microphones surrounding the seismometers to better understand and capture these signals. We aim to use the ambient 'noise' captured by the seismometers, further guided by the acoustic recordings, to track and better understand soil movement, both biotic and abiotic, in a novel manner, potentially opening up a new avenue of interdisciplinary research that bridges geomorphology and biology via geophysical and acoustical techniques.本研究拟在斯坦福大学（Stanford University）管理的贾斯珀岭生物保护区内的4个不同点位，搭建PASSCAL地震台阵（PASSCAL）并配套微机电系统（MEMS）声学记录仪，以期在2020年12月至2021年5月的约6个月周期内，连续监测地球地表及次表层过程（如生物扰动、土壤蠕动）；本方案旨在通过地震与声学信号的实时监测，深入解析土壤与生物过程。本实验与我们此前在圣迭戈及旧金山开展的依托PASSCAL地震台阵追踪土壤运移的研究形成互补，且新增了利用地震检波器周边小型MEMS麦克风采集的声学记录的优势，可进一步优化相关信号的解析与捕捉效果。我们计划依托地震检波器捕获的环境“噪声”，结合声学记录的辅助指引，以全新范式追踪并深入解析生物与非生物驱动的土壤运移过程，有望开辟一条通过地球物理与声学技术联结地貌学与生物学的跨学科研究新路径。