In the CCSM4-CICE output, there are apond001, apond0002, ..., apond005 and aicen0001, aicen0002, ..., aicen005. I find that aicen001 + aicen002 + ... + aicen005 is the total ice fraction (aice). But, when I sum the apond001 + apond002 +...+ apond005, it is up to 190%, also I have try another way: (apond001*aice001 + apond002*aice002 + .... + apond005*aice005）/100.0, it is only about 8% for north summer. I guess both of the two ways are wrong. Does it have any userguide for this calculate. Thanks very much.