| Multilayer distribution of carbon dioxide system in surface water of the Yellow Sea in spring |
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| 作者姓名： | 宫海东 张正斌 张闯 刘莲生 邢磊 |
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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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| 基金项目： | 国家自然科学基金;国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | 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, 1–5m), 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 of DIC, 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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| 关 键 词： | 二氧化碳 多层分布 地表水 黄海 海水化学 |
| 收稿时间： | 2005-11-15 |
| 修稿时间： | 16 January 2006 |
Multilayer distribution of carbon dioxide system in surface water of the Yellow Sea in spring |
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| Gong?Haidong,Zhang?Zhengbin,Zhang?Chuang,Liu?Liansheng,Xing?Lei.Multilayer distribution of carbon dioxide system in surface water of the Yellow Sea in spring[J].Chinese Journal of Oceanology and Limnology,2007,25(1):1-15. |
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| Authors: | Gong Haidong Zhang Zhengbin Zhang Chuang Liu Liansheng Xing Lei |
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| Institution: | (1) Institute of Marine Chemistry, Ocean University of China, Qingdao, 266003, China |
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| Abstract: | 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, 1–5m), 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 of DIC, 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.
Supported by the Major Project of the NSFC (No.40490263); the NSFC (No.40076020, 40376022); the National Basic Research Program
of China (973 Program) (No.2001CB409700); the Doctoral Program for Higher Education (No.20030423007). This paper was reported
in the international conference “the First Workshop on Asian Dust and Ocean Ecosystem” in Weihai, China, 12–15th, Oct., 2005. |
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| Keywords: | the Yellow Sea carbon dioxide (CO2) system multiplayer surface microlayer carbon flux |
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