why??? sun's atmosphere is more than 300 times hotter than its surface

scientists have struggled to determine why the sun's atmosphere is more than 300 times hotter than its surface.

But a new study has found a possible answer: giant super-tornadoes on the sun that may be injecting heat into the outer layers of our star. While comparing images from the Swedish Solar Telescope with others taken by NASA's Solar Dynamics Observatory, an international team of scientists noticed bright points on the sun's surface and atmosphere that corresponded with swirls in the so-called chromospheres, a region that is sandwiched between the two layers. The finding indicates that the solar tornadoes stretched through all three layers of the sun.