Finding F-0120

“The particulate matter levels outside are extremely low, with PM2.5 concentrations of 3.8 μg/m3 and PM10 concentrations of 30.8 μg/m3 .”

Zhang et al. Source Identification and Characterization of Indoor Particulate Matter in Potala Palace Museum (2023). Page 4. CKB 0308

Structure

Factor: Particulate matter (PM₂.₅ and PM₁₀)
Setting: museum (outdoor), CN
Study design: long-term monitoring of indoor and outdoor suspended particulate matter at the Potala Palace Museum (Tibet) with X-ray fluorescence analysis of deposited particles (class 4)
Effect: mean 30.8
Caveat: the sentence does not name the averaging statistic; Table 2 of the paper reports means

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.