Here's a breakdown:
* Lower chromosphere: Temperatures range from around 4,000 K to 10,000 K.
* Middle chromosphere: Temperatures can reach 20,000 K.
* Upper chromosphere: The temperature starts to decrease again, transitioning to the much hotter corona.
It's important to note that:
* The chromosphere is a very dynamic layer: Temperatures can fluctuate significantly, especially during solar flares and other energetic events.
* The temperature gradient is not linear: The chromosphere doesn't simply get hotter as you go higher. There are regions of relatively cooler gas within the chromosphere.
Understanding the chromosphere's temperature is crucial for comprehending the Sun's overall energy balance and its influence on the heliosphere (the region of space dominated by the Sun).
