I think this is a fascinating stitch pattern! I love the way the ovals nest within the unusual ribbing. The pattern looks pretty complicated, but after the first repeat, you'll get into the rhythm of it. To make this a four season pattern, I've given you instructions for both short and long sleeves - take your pick (or work up two sweaters!).
The yarn I used works up at a gauge of 5 sts per inch in Stockinette stitch; if you wish to use a different yarn, make sure you find one that will match this gauge.
29 sts and 28 rows = 4" (10cm) in Ornamental Rib