TY - JOUR A1 - Orsolini, Y. J. A1 - Urban, J. A1 - Murtagh, D. P. T1 - Nitric acid in the stratosphere based on Odin observations from 2001 to 2009 – Part 2: High-altitude polar enhancements JO - Atmos. Chem. Phys. J1 - ACP VL - 9 IS - 18 SP - 7045 EP - 7052 Y1 - 2009/09/23 PB - Copernicus Publications SN - 1680-7324 UR - https://acp.copernicus.org/articles/9/7045/2009/ L1 - https://acp.copernicus.org/articles/9/7045/2009/acp-9-7045-2009.pdf DO - 10.5194/acp-9-7045-2009 ER -