@misc{indiciae552cffbb4b80,
  title = {The Arctic tropopause fold},
  author = {Shapiro, M. A. and Hampel, T. and Krueger, A. J.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870052241},
  note = {Source identifier: 19870052241}
}