The QBO effect on the solar signal in the global stratosphere in the winter of the Northern Hemisphere |
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| Institution: | 1. Waterloo CFD Engineering Consulting Inc., Waterloo, Ontario N2T 2N7, Canada;2. Defence Research and Development Canada, Suffield Research Centre, P.O. Box 4000 Stn Main, Medicine Hat, Alberta T1A 8K6, Canada;3. Department of Mechanical & Mechatronics Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada;4. Department of Earth & Space Science & Engineering, York University, North York, Ontario, Canada;1. CPTEC – Center for Weather Forecasting and Climate Research, INPE – Brazilian National Institute for Space Research, São José dos Campos, Brazil;2. UNIFESP – Federal University of São Paulo, Campus Baixada Santista, Santos, Brazil;3. University of Oldenburg, Institute of Physics, Energy Meteorology Unit, 26111, Oldenburg, Germany;1. Department of Epidemiology and Biostatistics, Institute of Public Health, Kilimanjaro Christian Medical University College, Moshi, Tanzania;2. Department of Obstetrics and Gynaecology, Kilimanjaro Christian Medical Centre, Moshi, Tanzania;1. Computational Science Laboratory, Department of Computer Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA;2. Mathematics and Computer Science Division, Argonne National Laboratory, Lemont, IL, USA |
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| Abstract: | This paper contains correlations between the NCEP/NCAR global stratospheric data below 10 hPa and the 11-year solar cycle. In the north summer the correlations between the stratospheric geopotential heights and the 11-year solar cycle are strong and positive on the Northern Hemisphere and as far south as 30°S, whereas they are weak in the north winter all over the globe. If the global stratospheric heights and temperatures in the north winter are stratified according to the phase of the QBO in the lower stratosphere, their correlations with the solar cycle are large and positive in the Arctic in the west years of the QBO but insignificantly small over the rest of the earth, as far as the South Pole. In the east years, however, the arctic correlations with the solar cycle are negative, but to the south they are positive and strong in the tropical and temperate regions of both hemispheres, similar to the correlations with the full series of stratospheric data in the other seasons. The influence of the solar cycle in the Arctic is stronger in the latter half of the winter. The global difference, in the northern winter, in the sign and strength of the correlations between the stratospheric heights and temperatures and the solar cycle in east and west years of the QBO can be ascribed to the fact that the dominant stratospheric teleconnection and the solar influence work in the same direction in the east years, but oppose each other in the west years. |
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