@misc{76052,
  author = {H. Pümpel},
  title = {Maximum vorticity and maximum tendency charts: Two tools to identify areas of cyclonic activity in a medium range forecast},
  year = {1981},
  journal = {ECMWF Technical Memoranda},
  number = {36},
  pages = {8},
  month = {08/1981},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/11766},
  doi = {10.21957/2qx6262k9},
  language = {eng},
}