Low-latitude mesospheric signatures observed during the 2017 sudden stratospheric warming using the fuke meteor radar and ERA-5

摘要: Abstract The signature of the low-latitude mesosphere response to February 2017 minor sudden stratosphere warming (SSW) was detected using observations a meteor radar at Fuke (19.5°N, 109.1°E) station in China and ERA-5 data. Radar zonal wind reversal three days before SSW event, whereas does not reproduce mesospheric low-latitudes during large discrepancies are found between winds derived from ERA-5. quasi oscillatory pattern noted meridional afterward, northward significant. We observed existence 20–28-day planetary waves (PWs) measured 2-12-days period PWs after winds. structure periodicity have been verified with other Indian tropical Tirupati (13.63°N, 79.4°E). However, capture PW activity as radar. similarities dissimilarities among different techniques discussed. Therefore, present study re-emphasizes strong manner similar major event.