"Upper tropospheric water vapor Tropospheric water vapor is a key element of the Earth’s climate, which has direct effects as a greenhouse gas, as well as indirect effect through interaction with clouds, aerosols and tropospheric chemistry. Upper tropospheric water vapor (UTWV) has a much greater impact on the greenhouse effect than water vapor in the lower atmosphere [35], but whether this impact is a positive, or a negative feedback is still uncertain [36]. The main challenge in addressing this question is the difficulty in monitoring UTWV globally over long timescales. Continental deep-convective thunderstorms produce most of the lightning discharges on Earth. In addition, they transport large amount of water vapor into the upper troposphere, dominating the variations of global UTWV. Price [2000] [37] suggested that changes in the UTWV can be derived from records of Schumann Resonances."
We are approaching a borderline of significant planetary and interplanetary frequency changes. A lot of what happens here depends on the electromagnetic balance between the Earth and it's inhabitants. It's something of a feedback loop.