Here is a short report on an interesting discovery from the British Antarctic Survey.
Basically, melting ice can have positive impacts on climate change. New open land (that once was ice) allows trees to grow, sequestering C02. New open water (that once was ice) allows phytoplankton to bloom, also sequestering carbon. The former effect appears larger than the latter, and both are small relative to global emissions (less than 1%). Neither effect appears to have been incorporated into climate modeling and the associated predictions.
Science people... we call this 'negative feedback', right? That is, higher C02 creates conditions that diminish C02.