One of the most frustrating things about digital photography is the effect that is lovingly known as Banding! Banding is when the color space is too small to adequately transition between multiple shades of the same color, creating gaps in the image where a smooth tonal shift should take place. These gaps or "bands" most often take place in the sky where you have many different shades of blue. Which is what's happening to two of my images as I try to upload them.
I'm very happy with the images as they are in Lightroom but when I save them as jpegs in the sRGB color space the banding occurs. I know it's over saturation in the Blue channel and I have adjusted enough to get the blues to fall inside the boundaries of the histogram. But I ran out of time and had to go to work.
**Ok. So I learned something today. The simplest was to remove banding is to add grain! So I added just enough grain to one my images to remove the banding and uploaded them! The prints shouldn't need that treatment and therefore should remain grain less. Which they are.
** Update** Thankfully most web pages except RGB color space. so, I longer have this issue.