On March 17th, the lead PIs of ACCLIP (Asian summer monsoon Chemical and Climate Impact Project) made the decision to postpone the ACCLIP airborne field campaign from summer 2020 to 2021. The airborne field campaign was jointly funded by the NSF and NASA, and involves both the NCAR research aircraft Gulfstream V and the NASA research aircraft WB-57. This decision was forced by the global COVID-19 outbreaks. During the decision making process, ACOM scientists looked into the perturbation to atmospheric composition due to the large scale curtailing of human activities in response to COVID-19, in addition to the operational issues. In this short briefing, we report on the large signature in atmospheric composition from spaceborne observations for the time period of lockdown in China during February to early March, 2020.