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README.md

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+# WRF-Chem-LDA-LFR
+
+## Authors
+
+[Xin Zhang](mailto:[email protected]) and [Yunyao Li](mailto:[email protected])
+
+## Background
+
+The WRF-Chem-LDA-LFR Model is open-source code in the public domain, and its use is unrestricted.
+
+We have added the lightning assimilation to the basic [WRF model](https://github.com/wrf-model/WRF).
+
+## Modifications
+
+Note that the lightning assimilation has two parts:
+
+### 1. LDA
+
+The lightning data assimilation (LDA) technique was applied to improve the WRF meteorological simulations.
+
+We provide two methods to create the gridded flashes data for LDA.
+
+​	1) The Python scripts saved in `/LDA/Python`
+
+​	2) the IDL scripts in `/LDA/IDL`.
+
+For the LDA concept, please check the following papers:
+
+>[[1]](https://doi.org/10.1002/2017JD026461) Li, Y., Pickering, K. E., Allen, D. J., Barth, M. C., Bela, M. M., Cummings, K. A., ... & Biggerstaff, M. I. (2017). Evaluation of deep convective transport in storms from different convective regimes during the DC3 field campaign using WRF‐Chem with lightning data assimilation. *Journal of Geophysical Research: Atmospheres*, *122*(13), 7140-7163.
+>
+>[[2]](https://doi.org/10.1175/MWR-D-11-00299.1) Fierro, A. O., Mansell, E. R., Ziegler, C. L., & MacGorman, D. R. (2012). Application of a lightning data assimilation technique in the WRF-ARW model at cloud-resolving scales for the tornado outbreak of 24 May 2011. *Monthly Weather Review*, *140*(8), 2609-2627.
+>
+>[[3]](https://doi.org/10.1175/MWR-D-13-00142.1) Fierro, A. O., Gao, J., Ziegler, C. L., Mansell, E. R., MacGorman, D. R., & Dembek, S. R. (2014). Evaluation of a cloud-scale lightning data assimilation technique and a 3DVAR method for the analysis and short-term forecast of the 29 June 2012 derecho event. *Monthly Weather Review*, *142*(1), 183-202.
+>
+>[[4]](https://doi.org/10.1175/MWR-D-14-00183.1) Fierro, A. O., Clark, A. J., Mansell, E. R., MacGorman, D. R., Dembek, S. R., & Ziegler, C. L. (2015). Impact of storm-scale lightning data assimilation on WRF-ARW precipitation forecasts during the 2013 warm season over the contiguous United States. *Monthly Weather Review*, *143*(3), 757-777.
+
+### 2. LFR
+
+The lightning flash rate (LFR) is read directly from the generated LFR files to replace the lightning parameterization.
+
+Then, both lightning flash and lightning NO<sub>x</sub> will be placed in the "true" grids.
+
+For the LFR concept, please check the following papers:
+
+> [[1]](https://doi.org/10.5194/gmd-12-4409-2019
+> ) Kang, D., Foley, K. M., Mathur, R., Roselle, S. J., Pickering, K. E., & Allen, D. J. (2019). Simulating lightning NO production in CMAQv5. 2: performance evaluations. *Geoscientific model development*, *12*(10), 4409-4424.
+>
+> [[2]](https://doi.org/10.5194/gmd-12-3071-2019
+> ) Kang, D., Pickering, K. E., Allen, D. J., Foley, K. M., Wong, D. C., Mathur, R., & Roselle, S. J. (2019). Simulating lightning NO production in CMAQv5. 2: evolution of scientific updates. *Geoscientific model development*, *12*(7), 3071-3083.
+
+## Usage
+
+Please check the `README.md` under `LDA` and `LFR` directories.
+
+## Applications
+
+- Improving the convection simulation
+- Improving the lightning NO<sub>x</sub> estimation
+
+Feel free to use this model for your own research ;)