As was discussed in another thread, About the rough idea of the greenhouse effect and the temperature of the troposphere I said: So we test the hypothesis and see no troposphere warming in the measured radiosonde data and a distinct lower warming trend in the calculated satellite data: graph here How about the stratosphere data, that would require a cooling trend. Graph here Yes, they are cooler now than usual albeit without a distinct trend. We see some distinct spikes and a distinct lasting drop between 1993 and 1994, the temperature seems to be slowly recovering again. Not nearly a steady trend inverted proportional to the increase in greenhouse gasses. So what would be causing this behaviour of the stratosphere?