TY - JOUR A1 - Punge, H. J. A1 - Giorgetta, M. A. T1 - Differences between the QBO in the first and in the second half of the ERA-40 reanalysis JO - Atmos. Chem. Phys. J1 - ACP VL - 7 IS - 3 SP - 599 EP - 608 Y1 - 2007/02/07 PB - Copernicus Publications SN - 1680-7324 UR - https://acp.copernicus.org/articles/7/599/2007/ L1 - https://acp.copernicus.org/articles/7/599/2007/acp-7-599-2007.pdf DO - 10.5194/acp-7-599-2007 ER -