%0 Journal Article %D Submitted %T Impact of COVID-19 lockdown on methane emissions over North China %A Sheng, Jian-Xiong %A Bo Yao %A Zhen Qu %A Wang, Ting %A Ronald G. Prinn %A Pengfei Han %A Pucai Wang %A Ning Zeng %A Zhiqiang Ma %A Weijun Quan %A Shaojie Song %G eng