Edward Carpenter works in the Romberg Tiburon Center at San Francisco State University. His expertise is nitrogen fixation in the sea. He works in tropical and subtropical waters on the biology and ecology of nitrogen fixation in marine planktonic cyanobacteria. He also studies the microbial ecology of glacial melt water streams in the McMurdo Dry Valleys in Antarctica. Research is being carried out in the effects of ocean acidification on a globally important calcifying marine phytoplankton species, Emiliania huxleyi. While aboard the R/V Knorr, he will identify and count cyanobacterial diazotrophs, picoplankton and larger net phytoplankton. He will also (together with Ina Benner) measure chlorophyll content of whole water and < 10 um fraction. He'll measure DOC & DON in water column samples also.