Fig. 9From: Characteristics of the atmospheric electric field and correlation with CO2 at a rural site in southern BalkansObservations of potential gradient (PG), CO2, wind speed (WS), and vertical temperature gradient (DT = T 2.5m − T 1.5m) during May 1–3, 2012. Data are presented at 1-min resolution. PG and CO2 are presented as percentages of the respective 3-day mean. Vertical dashed lines denote sunrise and sunsetBack to article page