Final answer:
The stratospheric temperatures have generally decreased since 1950. Data from sources like NOAA and NASA indicate that while the average annual temperature on Earth has been rising, there have been increases and declines in long-term average precipitation. It's important to understand that stratospheric temperature trends can differ from surface temperature trends.
Step-by-step explanation:
The stratospheric temperatures have generally decreased since 1950.
Data from sources like the National Oceanic and Atmospheric Administration (NOAA) and the National Aeronautics and Space Administration (NASA) show that the Earth's surface temperatures have increased over the years, but this does not necessarily mean that stratospheric temperatures have followed the same trend.
While the average annual temperature on Earth has been rising for the past 100 years, there have been both documented increases and declines in long-term average precipitation during this period. Additionally, scientists have found that patterns of temperature and rainfall are shifting globally relative to baseline conditions.
It is important to note that stratospheric temperature trends can vary from surface temperature trends due to different atmospheric dynamics and factors.