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DOI Python 3.7 License

On the intermittency of orographic gravity wave hotspots and its importance for middle atmosphere dynamics

A. Kuchar, P. Sacha, R. Eichinger, Ch. Jacobi, P. Pisoft, and H. Rieder

Published in Weather and Climate Dynamics.

Code used to process and visualise the model and other data outputs in order to reproduce figures in the manuscript. Model data are available here. All datasets already preprocessed can be found here.

Notebooks for each individual figure as well as for two data tables are in the code/ directory, while the figures themselves are in the plots/ directory.

Figures

# Figure Notebook Dependencies
1 Ratio of zonally averaged OGWD in zonal direction to the total wave forcing reproduce_Fig1+2.ipynb
2 Winter climatology of the zonal OGWD component at 70 hPa reproduce_Fig1+2.ipynb
3 Area-weighted average of daily OGWD within the hotspot areas reproduce_Fig3+table.ipynb averaging.py, detect_peaks.py
4 Climatologies for the absolute gravity wave momentum fluxes at 20 and 30 km reproduce_Fig4.ipynb
5 Climatology of total parametrized zonally averaged GWD at 70 hPa in January averaged over the period 1980-2010 reproduce_Fig5+S3.ipynb
6 OGWD distribution at 70 hPa during boreal winter within HI, EA and WA hotspot, respectively, with log-norm fit reproduce_Fig6+S15.ipynb averaging.py
7 Spatial and annual variability of the Gini index of GW momentum fluxes at 100, 70, 50, 20, 10, 1 hPa within HI, EA and WA hotspot, respectively reproduce_Fig7+Smaps+S12-S14.ipynb
8 Composite anomalies of OGWD averaged at all lags within the selected hotspot areas on the 20-day timescale reproduce_Fig8.ipynb anomalies_calc-accelogw.ipynb

Supplementary figures

# Figure Notebook Dependencies
S1 Comparison between zonal and meridional OGWD didstributions at 70 hPa during boreal winter within HI, EA and WA hotspot, respectively reproduce_FigS1.ipynb
S2 Climatological relative EPFD contribution to the overall drag in January averaged over the period 1980-2010 reproduce_FigS2.ipynb
S3 Climatological average of particular CMAM-sd tendencies in January averaged over the period 1980-2010 reproduce_Fig5+S3.ipynb
S4 Spatial variability of Gini index of OGW momentum fluxes at 100,70,50,20,10,1 hPa for DJF reproduce_Fig7+Smaps+S12-S14.ipynb
S5 Spatial variability of Gini index of NGW momentum fluxes at 100,70,50,20,10,1 hPa for DJF reproduce_Fig7+Smaps+S12-S14.ipynb
S6 Spatial variability of Gini index of OGW momentum fluxes at 100,70,50,20,10,1 hPa for MAM reproduce_Fig7+Smaps+S12-S14.ipynb
S7 Spatial variability of Gini index of NGW momentum fluxes at 100,70,50,20,10,1 hPa for MAM reproduce_Fig7+Smaps+S12-S14.ipynb
S8 Spatial variability of Gini index of OGW momentum fluxes at 100,70,50,20,10,1 hPa for JJA reproduce_Fig7+Smaps+S12-S14.ipynb
S9 Spatial variability of Gini index of NGW momentum fluxes at 100,70,50,20,10,1 hPa for JJA reproduce_Fig7+Smaps+S12-S14.ipynb
S10 Spatial variability of Gini index of OGW momentum fluxes at 100,70,50,20,10,1 hPa for SON reproduce_Fig7+Smaps+S12-S14.ipynb
S11 Spatial variability of Gini index of NGW momentum fluxes at 100,70,50,20,10,1 hPa for SON reproduce_Fig7+Smaps+S12-S14.ipynb
S12 Spatial and annual variability of the Gini index of OGW momentum fluxes at 100, 70, 50, 20, 10, 1 hPa within HI, EA and WA hotspot, respectively reproduce_Fig7+Smaps+S12-S14.ipynb
S13 Spatial and annual variability of the Gini index of NOGW momentum fluxes at 100, 70, 50, 20, 10, 1 hPa within HI, EA and WA hotspot, respectively reproduce_Fig7+Smaps+S12-S14.ipynb
S14 Spatial and annual variability of Gini index of OGW momentum fluxes at 850 hPa within Himalayas, East Asia and West America hotspot, respectively. reproduce_Fig7+Smaps+S12-S14.ipynb
S15 OGWD distribution at 70 hPa during boreal winter within HI, EA and WA hotspot, respectively with Weibull fit reproduce_Fig6+S15.ipynb

Tables

# Figure Notebook Dependencies
1 Number of detected peak events per month for the three selected hotspot areas reproduce_Fig3+table.ipynb

Required package installation

pip install -r requirements.txt

References

Kuchar, A., Sacha, P., Eichinger, R., Jacobi, C., Pisoft, P., and Rieder, H. E.: On the intermittency of orographic gravity wave hotspots and its importance for middle atmosphere dynamics, Weather Clim. Dynam., 1, 481-495, https://doi.org/10.5194/wcd-2020-21, 2020.

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Code for the paper submitted to Weather and Climate Dynamics

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python climate climate-data atmospheric-science climate-science climate-data-analysis climate-analysis

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