| THE ROLE OF MARGINAL ICE ZONE IN THE CARBON CYCLE IN THE SOUTHERN OCEANLiqi Chen 1, 2, Zhongyong Gao 1, Weiqiang Wang 1, Xulin Yang 11 Key's Lab of Global Change and Marine-Atmospheric Chemistry, SOA, Xiamen 361005，China2 Chinese Arctic and Antarctic Administration, Beijing 100860, ChinaThe Southern Ocean can be divided into Polar Front(PF), Permanent Open Ocean Zone(POOZ), Seasonal Ice Zone(SIZ), as well as Coastal and Continent Shelf Zone(CCSZ) based on hydrology. However, it can also be separated into free ice zone and ice zone by 60S Line based on biogeochemical cycling of carbon.The some significant results show as followings: (1). pCO2 shows a good relation with SST in NIZ, and disappeared in IZ, especially in MIZ, (2) . Within MIZ，pCO2 has a good mirror-image relationship with chl.a, but it has nothing to do with chl.a in NIZ, (3).The air to seawater carbon flux in January is about twice as that in December due to receding of seaice, (4). SIZ plays significant role as sink of Atmospheric CO2 generally, with the exception of AD (Antarctic Divergence) area, in which there are the deep water enriched CO2 upwelling, and (5). Despite the effect of Antarctic Divergence, the SIZ shows a general trend of pCO2 decreasing southward to the margin of ice zone, and dropped dramatically in MIZ. It reflects MIZ as an important area in the carbon cycling of the Southern Ocean.1. P062. The Southern Ocean 3. Air-sea exchange of CO2, the Southern Ocean4. 018560 Prof Liqi Chen, Key's Lab of Global Change and Marine-Atmospheric Chemistry, State Oceanic Administration, Mail Address: The Chinese Arctic and Antarctic Administration, 1 Fuxingmenwai Av. Beijing 100860, China, Tel: +86-10-68017625, Fax: +86-10-68012776, E-mail: Lqchen@ustc.edu.cn 5. O6. PC7. NO8. Liqi Chen: YES9. NONE |
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