Variation of fair weather atmospheric electricity at Marsta Observatory, Sweden, 1993–1998

Long-term changes in atmospheric electrical parameters observed at Nagycenk (Hungary) and the UK observatories at Eskdalemuir and Kew

“…Additionally, the variation derived for winter closely followed the shape of the Carnegie curve, known to be globally representative from ocean measurements. These findings agree with results presented by Israelsson and Tammet (2001) for Marsta. As mentioned in the Introduction, the study here is concerned with atmospheric electrical effects on a longer time scale.…”

“…The PG diurnal variation over the oceans is again included for comparison. In accordance with earlier results determined for Nagycenk , as well as with those recently presented for Marsta by Israelsson and Tammet (2001), the diurnal variation curves for winter (in Fig. 1a) follow quite closely the master curve representing the global diurnal variation, while the correspondence between the two kinds of curves is rather poor for the summer months (Fig.…”

“…Distinguishing between weekdays and Sundays provided a further method of assessing air pollution influences. Israelsson and Tammet (2001) reported air conductivity data measured at Marsta (Sweden), using an analysis method similar to that of Sheftel et al (1994a). The relative conductivity values determined for individual days of the week hardly differ from each other at Marsta, located in a rural area.…”

“…In summary, effects of local origin are likely to strongly differ at the individual stations in the different local circumstances. Israelsson and Tammet (2001) have checked the representativeness of the fair-weather electric field and vertical air-Earth current data, by comparing the diurnal variation of these two parameters with the Carnegie curve. Based on correlation analyses, it is evident that the global component dominates in both parameters in winter, while local factors particularly affect the diurnal variations in summer.…”

“…Based on correlation analyses, it is evident that the global component dominates in both parameters in winter, while local factors particularly affect the diurnal variations in summer. Israelsson and Tammet (2001) also hypothesized that the reduction in the quantity of data, following selections based on local temperature and wind variation effects, would supress the share of the local component in atmospheric electric variations in favour of the global component. Their hypothesis proved to be inadequate.…”