In a young earth view , the flood is what caused an ice age.
Please read "Noah's Ark: A Feasibility Study" by John Woodmorappe. On Amazon it's out of stock but available from several sellers, but it's much more inexpensive at Answers in Genesis. Please visit this FAQ about the book.
 I believe in an old Earth as of 1/10. It is my belief that a global flood and an old Earth are true and reconciliable. As of 1/10 I reject macroevolution and universal common ancestry but not microevolution.