falling tone

Xie, Y., Teng, S., Wu, Y., & Tao, X. (2021). A statistical analysis of duration and frequency chirping rate of falling tone chorus. Geophysical Research Letters, n/a, e2021GL095349. http://doi.org/https://doi.org/10.1029/2021GL095349 (Original work published September 2021)
Shen, X. -C., Li, W., & Ma, Q. (2021). Periodic Rising and Falling Tone ECH Waves from Van Allen Probes Observations. Geophysical Research Letters, n/a, e2020GL091330. http://doi.org/https://doi.org/10.1029/2020GL091330 (Original work published February 2021)
Gao, Z., Su, Z., Chen, L., Zheng, H., Wang, Y., & Wang, S. (2017). Van Allen Probes observations of whistler-mode chorus with long-lived oscillating tones. Geophysical Research Letters. http://doi.org/10.1002/2017GL073420 (Original work published June 2017)