2019年6月10日 · The Quasi-biennial Oscillation (QBO) is a tropical, lower stratospheric, downward propagating zonal wind variation, with an average period of ~28 months. The importance of the QBO is that it dominates the variability of the tropical lower stratospheric meteorology [Wallace, 1973].

Naujokat (1986) documents the data, uncertainties in the early years due to the lack of daily data, the change of reference stations, and the general features of the QBO. Marquardt and Naujokat (1997) describes the update of this index.

1948 2025 1948 -4.44 -5.78 -7.31 -6.70 -5.57 -4.73 -5.51 -7.22 -7.24 -6.07 -6.28 -8.18 1949 -9.77 -11.80 -11.72 -10.69 -9.34 -9.43 -9.07 -9.08 -8.32 -7.01 -6.43 -7.24 1950 -8.99 -11.37 -10.63 -8.19 -6.09 -6.61 -7.11 -6.51 -3.82 -2.39 -2.18 -3.31 1951 -6.01 -5.32 -1.93 0.91 2.26 -0.30 -2.70 -5.31 -5.92 -4.59 -3.65 -3.98 1952 -6.80 -7.71 -6.99 -5.68 -4.76 -6.00 -7.60 -8.15 -5.73 -2.96 -0.51 -1. ...

30 mb zonal wind index - CDAS ORIGINAL DATA YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1979 1.85 4.11 0.87 -3.58 -12.91 -19.61 -21.28 -22.25 -22.71 -23.33 -22.21 -17.00 1980 -10.12 -5.66 -2.92 2.30 6.23 7.32 8.73 9.60 12.65 13.09 12.14 9.72 1981 8.21 6.71 7.50 8.27 3.00 -3.50 -5.24 -8.25 -8.60 -9.54 -9.63 -12.32 1982 -12.53 -14.72 -16.68 -15.56 -15.27 -15.95 -8.97 -1.60 4.19 8.26 9. ...

Indices QBO: Quasi-Biennial Oscillation Index. Time: [0000 1 Jan 1948,0000 1 Feb 2025]

Indices QBO Quasi-Biennial Oscillation: Calculated at PSL (from the zonal average of the 30mb zonal wind at the equator as computed from the NCEP/NCAR Reanalysis).. Documents ftp url

Quasi-Biennial Oscillation (QBO) Zonally averaged 30mb winds at the equator. The winds have a very strong biennial periodicity.

2022年9月9日 · The quasi-biennial oscillation (QBO) is a quasi-periodic oscillation of the equatorial zonal wind between easterlies and westerlies in the tropical stratosphere with a mean period of 28 to 29 months. The alternating wind regimes develop at the top of the lower stratosphere and propagate downwards at about 1 km (0.6 mi) per month until they are ...

2022年4月21日 · The QBO index is defined as the zonal-mean zonal wind area-averaged over 10°S–10°N at 50 hPa. The composite and regression analysis in this study uses the Student's t -test for significance test.

2022年10月21日 · Here, we first revisited the influences of the QBO (QBOW–QBOE, using a QBO index at 20 hPa) on TCO and zonal mean stratospheric ozone using a longer record of merged satellite data (1979–2020 for TCO and 1984–2020 for zonal mean ozone), together with the most recent ERA5 reanalysis and NCAR's CESM-WACCM model simulations.