[Keyword='climate indices']
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Quasi-Biennial Oscillation (QBO) Zonal Wind Index, 1953-present Entry ID: QBO_ZONAL_WIND_INDEX |
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Summary
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Abstract:
[Text Source: Freie Universitat Berlin, http://www.geo.fu-berlin.de/en/met/ag/strat/produkte/qbo/ ] Almost 50 years ago, the Quasi-Biennial Oscillation (QBO) of the winds in the equatorial stratosphere was detected due to the establishment of a global, regularly measuring radiosonde network (Graystone, 1959; Ebdon, 1960). As part of the compilation of our daily stratospheric charts we have tabulated the daily wind observations of selected stations near the equator since 1957. For the earlier years, the values were extracted from the Northern Hemisphere Data Tabulations. From these daily values the monthly mean zonal wind components were calculated for the levels 70, 50, 40, 30, 20, 15, and 10 hPa and a data set from 1953 to the present was produced by combining the observations of the three radiosonde stations Canton Island (closed 1967), Gan/Maledive Islands (closed 1975), and Singapore (data file: qbo.dat). This data set is supposed to be representative of the equatorial belt since all studies have shown that longitudinal differences in the phase of the QBO are small. It should be noted, however, that some uncertainties arose at higher levels during the early years from the scarcity of observations. More information on the original data can be found in Naujokat (1986). A second data set has been produced since 1987 from the Singapore data by using the daily vertical wind profiles to obtain a higher vertical resolution. In this set you will find the monthly mean zonal wind components at Singapore for every year from 1987 to the present at the levels 100 (since 1997), 90, 80, 70, 60, 50, 45, 40, 35, 30, 25, 20, 15, 12, and 10-hPa (singapore.dat). |
Related URL
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Link:
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Description: Access to documentation, graphics, and QBO monthly data. Link: VIEW PROJECT HOME PAGE Description: Stratospheric Research Group of the Freie Universitat Berlin, Germany. |
Geographic Coverage
| N: 1.0 | S: -3.0 | E: -172.0 | W: 73.0 |
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Data Set Citation
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Dataset Originator/Creator:
Barbara Naujokat, Christian Marquardt, Freie Universitat Berlin.
Dataset Title: Quasi-Biennial Oscillation (QBO) Zonal Wind Index Dataset Release Place: Berlin, Germany Dataset Publisher: Freie Universitat Berlin Online Resource: http://www.geo.fu-berlin.de/en/met/ag/strat/produkte/qbo/ |
Temporal Coverage
| Start Date: 1953-01-01 |
Location Keywords
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OCEAN
> PACIFIC OCEAN
> TROPICAL PACIFIC
VERTICAL LOCATION > STRATOSPHERE GEOGRAPHIC REGION > TROPICS |
Data Resolution
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Temporal Resolution:
Biennial
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Science Keywords
| ATMOSPHERE >ATMOSPHERIC WINDS >UPPER LEVEL WINDS [Definition] |
| CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >QUASI-BIENNIAL OSCILLATION >QBO [Definition] |
ISO Topic Category
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CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
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Use Constraints
| Please cite the dataset originator if you use this data. |
Keywords
| QBO |
| Quasi-Biennial Oscillation |
| zonal winds |
| wind anomalies |
| climate index |
| climate indices |
| climate change |
Data Set Progress
| IN WORK |
Data Center
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Meteorological Institute, Freie Universitat Berlin
[Information]
Data Center URL: http://www.met.fu-berlin.de/
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Distribution
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Distribution_Media:
Online (HTTP)
Distribution_Format: ASCII Fees: None |
Personnel
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CHRISTIAN
MARQUARDT Role: TECHNICAL CONTACT Role: INVESTIGATOR Email: marq at gfz-potsdam.de Contact Address: GeoForschungs Zentrum City: Potsdam Country: Germany |
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BARBARA
NAUJOKAT Role: INVESTIGATOR Role: TECHNICAL CONTACT Email: naujokat at strat01.met.fu-berlin.de Contact Address: Institut fur Meteorolgie der Freien Universitat Berlin Carl-Heinrich-Becker-Weg 6-10 Postal Code: 12165 Country: GERMANY |
Publications/References
Naujokat, B. (1986), An update of the observed quasi-biennial oscillation of the stratospheric winds over the tropics, J. Atmos. Sci., 43, 1873-1877
Marquardt, C., and B. Naujokat (1997), An update of the equatorial QBO and its variability. 1st SPARC Gen. Assemb., WMO/TD, 1, 814, 87-90, Melbourne Australia
Marquardt, C. (1997), Die tropische QBO und dynamische prozesse in der stratosphdre., Ph.D. dissertation, Freie Universitdt Berlin
Marquardt, C., and B. Naujokat (1997), An update of the equatorial QBO and its variability. 1st SPARC Gen. Assemb., WMO/TD, 1, 814, 87-90, Melbourne Australia
Marquardt, C. (1997), Die tropische QBO und dynamische prozesse in der stratosphdre., Ph.D. dissertation, Freie Universitdt Berlin
Creation and Review Dates
DIF Creation Date:
1999-07-30
Last DIF Revision Date:
2012-09-24
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