Quasi-2-day wave in low-latitude atmospheric winds as viewed from the ground and space during January-March, 2020 Journal Article uri icon

Overview

abstract

  • Horizontal winds from four low-latitude (+/-15o) specular meteor radars; (SMRs) and the MIGHTI instrument on the ICON satellite, are combined to; investigate quasi-2-day waves (Q2DWs) in early 2020. SMRs cover 80-100; km altitude whereas MIGHTI covers 95-300 km. Q2DWs are the largest; dynamical feature of the summertime middle atmosphere. At the; overlapping altitudes, comparisons between the derived Q2DWs exhibit; excellent agreement. The SMR sensor array analyses show that the; dominant zonal wavenumbers are s=+2 and +3, and help resolve ambiguities; in MIGHTI results. We present the first Q2DW depiction for s=+3 up to; 200 km and for $s=+2$ above 95 km, and show that their amplitudes are; almost invariant between 80 and 100 km. Above 106 km, Q2DW amplitudes; and phases present structures that might result from the superposition; of Q2DWs and their aliased secondary waves.

publication date

  • April 8, 2021

has restriction

  • hybrid

Date in CU Experts

  • April 9, 2021 11:58 AM

Full Author List

  • He M; Chau JL; Forbes JM; Zhang X; Englert CR; Harding BJ; Immel TJ; Lima LM; Rao SV; Ratnam MV

author count

  • 14

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