Multilayer distribution of carbon dioxide system in surface water of the Yellow Sea in spring

GONG Haidong; ZHANG Zhengbin; ZHANG Chuang; LIU Liansheng; XING Lei

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Multilayer distribution of carbon dioxide system in surface water of the Yellow Sea in spring

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Surface water can be divided into three layers from top downward: surface microlayer(SML, thickness≤50 μm), subsurface layer (SSL, ≈25 cm) and surface layer (SL, 1-5 m), among which the SML plays an important role on sea-air interaction because of its unique physical-chemical property.Carbon dioxide system including DIC (dissolved inorganic carbon), Alk (alkalinity), pH and pCO2 (partial pressure of CO2) in multilayered waters of the Yellow Sea was studied for the first time in March and May 2005. The results show that: DIC and Alk are obviously enriched in SML. The contents ofDIC, Alk and pCO2 become lower in turn from SML, SSL to SL, higher in March and lower in May, whereas for pH it was opposite. The relationship between DIC and Alk is clearly positive, but negative between pH and pCO2. Meanwhile, pCO2 and temperature/salinity is also in positive relation, pCO2 decreases with latitude increase. DIC and Alk show a similar variation trend with the maximum at 02:00-03:00, but pH and pCO2 show an opposite pattern. In addition, the distribution patterns are similar to each other in the three layers. The Yellow Sea is shown to be a sink of atmospheric CO2 in spring by two methods: (1)comparing pCO2 in seawater and atmosphere; (2) turning direction of "pH-depth" curve. Calculation on the base of pCO2 data in SML in four models shows that carbon flux in spring in the area was about-6.96×106 t C.

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《中国海洋湖沼学报（英文版）》 |2007年第1期|1-15|共15页
作者
GONG Haidong; ZHANG Zhengbin; ZHANG Chuang; LIU Liansheng; XING Lei;
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作者单位

Institute of Marine Chemistry, Ocean University of China, Qingdao 266003, China;

Institute of Marine Chemistry, Ocean University of China, Qingdao 266003, China;

Institute of Marine Chemistry, Ocean University of China, Qingdao 266003, China;

Institute of Marine Chemistry, Ocean University of China, Qingdao 266003, China;

Institute of Marine Chemistry, Ocean University of China, Qingdao 266003, China;

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原文格式 PDF
正文语种 chi
中图分类化学;
关键词
the Yellow Sea; carbon dioxide (CO2) system; multiplayer; surface microlayer; carbon flux;

机译：黄海;二氧化碳（CO2）系统;多层;表面微层;碳通量;

Multilayer distribution of carbon dioxide system in surface water of the Yellow Sea in spring

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