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首页> 外文期刊>Geophysical Research Letters >Synthesis of Methane Observations Across Scales: Strategies for Deploying a Multitiered Observing Network
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Synthesis of Methane Observations Across Scales: Strategies for Deploying a Multitiered Observing Network

机译：跨尺度甲烷观测的合成：部署多元观测网络的策略

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Regional methane emissions monitoring is rapidly expanding with increased coverage of surface, airborne, and satellite instruments. We pilot a multitiered observing system in the Los Angeles Basin. We combine surface methane measurements from the Los Angeles Megacities Carbon Project, mountaintop retrievals from the CLARS-FTS instrument, and space-based X-CH4 retrievals from the TROPOMI instrument into a single monitoring framework. We simulate these observations using a high-resolution tracer transport model. Using inverse methods, we compare the sensitivity of each observing system component to various emissions sources. Combining multiple observing system into one framework allows for increased spatial and temporal sensitivity to methane emissions. We find a close correspondence between these inverse flux trends and independent airborne AVIRIS-NG methane plume trends over a large landfill in the Los Angeles Basin. These results show that multitiered observing systems can reveal insights about sub-basin scale methane emissions, which can be used to drive decision support.
机译：区域甲烷排放监测正在迅速扩展，随着表面，空中和卫星仪器的覆盖率增加。我们在洛杉矶盆地试点了一个多元的观测系统。我们将表面甲烷测量从洛杉矶巨型碳项目组合，从旧版仪器的山顶检索，以及从Tropomi仪器的空间的X-CH4检索到一个单一的监控框架中。我们使用高分辨率示踪运输模型模拟这些观察。使用逆方法，我们将每个观察系统组件的灵敏度与各种排放来源进行比较。将多个观察系统组合成一个框架允许增加对甲烷排放的空间和时间敏感性。我们在洛杉矶盆地的大型垃圾填埋场之间发现这些反馈趋势和独立空中Aviris-NG甲烷羽流趋势的密切对应。这些结果表明，多元观测系统可以揭示关于亚盆地甲烷排放的见解，可用于推动决策支持。

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