RESEARCH INTERESTS

• CO2 and O2 exchange across the air-sea interface and carbon cycling in coastal oceans--Use gas fluxes and DIC and alkalinity mass balances as integrated measures of biogeochemical processes at the whole system level. Currently, I work on the US southeastern continental shelf (with NSF support) and estuaries (NSF-LTER and NOAA-LUCES supports), the Mississippi River plume (with NASA support), and the China Seas (in collaborations with colleagues in China).
  
  
• Development of in situ (micro-)sensors for measurement of biogeochemical cycles-in particularly pH and pCO2 microelectrodes.
  
  
• Measuring and modeling the decomposition of organic matter and the dissolution of CaCO3 in marine sediments—In particular the relationship between porewater pH/pCO2 and the cycling of redox species.
  
  
• Global changes, current and past.
  
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