Stratosphere 2020-2025

Ulike the Troposphere (Lower and Mid), Stratospheric temperatures exhibit a faalling trend.

From 2021 until 2025 annual averaage temperatures varied up and down within a naarrow range. From 2025, there has been a distinct downwaard trend in monthly and annual averages. Longer-term averages may be turning downwards.

12-month differences in Annual averages: Stratosphere vs. Lower Troposphere

The narrow range (-0.3 to +0.3 ⁰C) in 12-month differences in Stratospheric temperature contrasts with the sharp spike seen in 2024 in the Lower Troposphere temperature.

Simple Exponential Smoothing

The period 2021 to mid 2024 was uneventful until late 2024 when a rise was followed by a significant fall which may still be continuing.