EGU2020-3187, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-3187
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

A teleconnection pattern of 10-30-day atmospheric oscilations over North Pacific during summer: Chracteristics and maintainance mechanism

Lei Du and Riyu Lu
Lei Du and Riyu Lu
  • State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institude of Atmospheric Physics , Chinese Academy of Sciences , Beijing, China (dulei@mail.iap.ac.cn)

The present study investigates the intraseasonal variations of meridional winds over North Pacific during summer based on reanalysis datasets. It is shown that the band of 10-30 days is the main component of total intraseasonal varaitions. We identified a teleconnection pattern over North Pacific at this band . This teleconnection pattern is characterized by a zonally-oriented wave-like structure with a zonal wavenumber 5, and does not show a phase-locking feature. In addition, the anomalies associated with the teleconnection pattern exhibit a roughly baratropic structure. Further analyses suggest that the teleconnection pattern can gain energy from the basic flow through the baroclinic energy conversion, while the barotropic energy conversion plays a trivial role.

How to cite: Du, L. and Lu, R.: A teleconnection pattern of 10-30-day atmospheric oscilations over North Pacific during summer: Chracteristics and maintainance mechanism, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-3187, https://doi.org/10.5194/egusphere-egu2020-3187, 2020