Balamurugan, Vigneshkumar;Chen, Jia;Qu, Zhen;Bi, Xiao;Gensheimer, Johannes;Shekhar, Ankit;Bhattacharjee, Shrutilipi;Keutsch, Frank N.Tropospheric NO 2 and O 3 Response to COVID‐19 Lockdown Restrictions at the National and Urban Scales in GermanyJournal of Geophysical Research: Atmospheres202112619