exposure problems in a sunshine photo?

arthurwsl  wrote this photo was rejected due exposure problems, but is a sunshine photo, it is suposed to be dark! some advice?

No, it's supposed to have equilibrium in exposure. As ricky336​ says, your blacks are really to black.

But there are additional problems:

• 
  Your sensor has dust. That needs to be cleaned out (easy here)...
• Here is an other smirk which is much more difficult to edit out:
  
  It may be part of the picture's clouds, but it looks disturbing.
  
  
• I could not find the focus everything is washed out. Did you noise reduction on this? The picture has been taken with ISO1600 but a exposure of 2000/s and an aperture of 9.
  ISO should be 100, exposure would be around 125, you could get down with the aperture if you want to push exposure.