Mammoth

Repository that documents processing of Eddy Covariance, GNSS Time Series, Strain Calculation, and Figure Production for Hilley, Lewicki, and Baden (2022).

The key files in this repository are:

1. Analysis.ipynb - This notebook was used for initial development of the GPS processing module. The results from this notebook appear nowhere in the published study.
2. AverageSGSSimulations.ipynb - This notebook was used to compute the source-weight function for the eddy covariance measurements. The notebook reads a set of sequential gaussian simulations that are based on measured accumulation-chamber flux measurements. The averaging gives an estimate of the spatial distribution of CO2 fluxes coming from the ground.
3. CalculateHSLStresses.ipynb - This notebook uses the GNSS time-series (that is detrended) to calculate strains across the Long Valley Caldera area. These strains are then used with Hooke's Law to calculate stresses, given the plane-stress assumption used by GPSGridder. The notebook should reproduce Figure 4 and Figure S1.
4. CalculateHSLStressesUnfiltered.ipynb - This notebook is identical to CalculateHSLStresses.ipynb, excepting that the GNSS time series is not smoothed using a moving-window Gaussian weighting function.
5. ECFilteredTS.ipynb - Notebook to read, plot, and fit sinusoidal variations (2x daily, daily, yearly) and multi-year (erfc function) to eddy covariance flux measurements.
6. EddyData.py - Python module to load and manipulate eddy covariance data.
7. EddyParserDevelopment.ipynb - Jupyter notebook that was used to develop EddyData.py functionality.
8. FootprintAnalysis.ipynb - Jupyter Notebook to read EC time-series and footprint models (per half-hour metereological data) and analyze whether or not changing footprint source areas could account for changes in EC time series. Should reproduce Figure 3 in text.
9. GNSSTimeSeriesPlotting.ipynb - Jupyter notebook to read and display example data from GNSS stations in the Long Valley area.
10. GPSDevel.ipynb - Notebook used for development of gpsutils.py (results not used in text).
11. HotCreek.ipynb - Jupyter notebook used to perform preliminary analysis of Hot Creek gauging station data (in Long Valley). Analysis not used in article.
12. LoadAndProcessGPSData.ipynb - Notebook used to create pickled data files containing Long Valley (and surrounding) GNSS station and network data.
13. LoadAndProcessRegionalGPSData.ipynb - Notebook used to created pickled data files containing greater Sierra Nevada GNSS station and network information.
14. MMFGeometry.ipynb - Jupyter Notebook documenting three-dimensional trace of Mammoth Mountain Fault, as extracted based on mapping cross-referenced with digital topographic data.
15. MakeAnimations.ipynb - Jupyter Notebook to make Movie S1.
16. MakeAnimationsSierras.ipynb - Jupyter Notebook to create animation of strains throughout the entire Sierra Nevada during the time series analyzed (not presented in contribution).
17. MakeAnimationsSierrasVertical.ipynb - Jupyter notebook to create animation of vertical motions throughout the Sierra Nevada based on GNSS time-series.
18. MakeAnimationsVertical.ipynb - Jupyter notebook to create animation of vertical motions for the Long Valley Area based on GNSS time-series.
19. NoiseAnalysis.ipynb - Exploration of the effect of smoothing window on eddy convariance flux time-series (reproduces Figure contained in Lewicki 2021)
20. VerticalAnalysis.ipynb - Exploration of the correlations between vertical motions and inferred stress changes along Mammoth Mountain Fault (not reported in manuscript).
21. filters.py - module that contains filters that can be applied to time-series.
22. footprints.py - Footprint source-area functions.
23. gpsgridderDevel.ipynb - Notebook used for development of python GPS gridder implementation.
24. gpsutils.py - module for reading and manipulating GPS time series and networks.
25. plotting.py - module containing plotting routines.
26. strains.ipynb - early work on calculating strains. Approach abandoned in favor of Strain2D modification.
27. utils.py - misc manipulation utilities.