Global mobile advertising spend reached $5.3 billion in 2011, according to a joint report from the IAB Mobile Marketing Center of Excellence in the US, IAB Europe, and IHS Screen Digest. Search accounted for the largest portion of mobile ad spending, at 62%, or $3.3 billion. Search’s dominance was most prevalent in the Asia-Pacific region, where it accounted for more than 72% of the region’s leading $1.92 billion in ad spend. In North America, the next-largest region by spend ($1.7 billion), search accounted for a more modest 48% share. Display picked up the slack in North America, with the largest absolute value ($572 million) and spend share (34%) of any of the regions. In Europe, search held 65% share of the $1.4 billion market, with display (27%) and messaging (8%) making up the remainder. Read the rest at Marketing Charts.