Global tropospheric OH concentrations in the past four decades inferred from surface network and satellite trace gas observations

Prinn, Ronald G.; Sheng, Jian-Xiong; Harth, Christina M.; Krummel, Paul B.; Lunder, Chris René; Muhle, Jens; Odoherty, Simon Joseph; Salameh, Peter K.; Weiss, Ray F.; Young, Dickon; Sheese, Patrick; Walker, Kaley A.