Fig. 1: HClO3 and HClO4 over the Arctic.
From: Widespread detection of chlorine oxyacids in the Arctic atmosphere
Time series of HClO3, HClO4, and O3, together with the temperature and incoming solar radiation measured at a the Villum Research Station from 1 March–15 May 2015 and b during the MOSAiC expedition from 22 February–30 April 2020. The data are displayed at a 30-min-average resolution, and any gaps in the time series are the results of instrumentation offline and maintenance periods. The dashed line represents the detection limits for HClO3 (blue) and HClO4 (pink) measurements. The uncertainty of HClO3 and HClO4 measurements was estimated to be at least a factor of two (see Methods). The map shows the ___location of the Villum Research Station (Nord) in Greenland, Ny-Ålesund in Svalbard, and RV Polarstern passive drifting track across the Arctic Ocean during the springtime sampling period. Note that all the time reported here is in Coordinated Universal Time (UTC). The map was created by the authors using MathWorks MATLAB (https://www.mathworks.com/products/matlab.html).
