SOS!!!!! Character Shadow

I made shadow sprite, its following player on x. y is static. but i want when character jumps. the shadow sprite scaled down little bit.is there any way to make shadow sprite chande its width little bit when character is junping and then get back to original scale when character is on ground?

Or is there any other way to cast realsitic shadows?

Set shadow width to base width+(character.y-shadow.y)*scale.

Alternatively if your shadow already has an opacity gradient, a better effect might just be to reduce the opacity of the shadow proportional to the distance from the sprite.