The 26-year-old forward will wear the armband for Blues, starting with the UEFA Women's Champions League quarter-final tie against Arsenal Ladies
at St. Andrew's on Monday 24 March (7pm kick-off).
"This is a dream come true," commented Carney. "Being a born-and-bred Bluenose and having started my career at the football club, it goes without saying that this is a very proud moment.
"I am now determined to lead Blues to a successful 2014 in both the UEFA Women's Champions League and the FA Women's Super League. I will wear the armband with pride and, as ever, continue to give my all for this fantastic club."
The Solihull-born star started her career at Blues before leaving to gain experience with Arsenal and the Chicago Red Stars between 2006 and 2010. The Team GB Olympian then returned to the Second City in 2011 and played a large part in guiding the club to successive runners-up finishes in the FA WSL and Continental Cup, as well as the lifting of the 2012 FA Women's Cup.
The England regular, who is fast closing in on 100 caps, has just returned from the Cyprus Cup
, where the Three Lions reached the final only to suffer a 2-0 loss to France.