韩宗奕,秦川,郑文静,张桂玲,简慧敏

• 1:中国海洋大学深海圈层与地球系统前沿科学中心和海洋化学理论与工程技术教育部重点实验室
• 2:青岛海洋科学与技术试点国家实验室海洋生态与环境科学功能实验室

摘要(Abstract)：

群落净生产力(Net Community Production, NCP)代表了总初级生产力与群落呼吸的差值，是衡量生物活动对上层海洋碳循环影响的重要指标。O_2/Ar比值消除了物理过程对海水中溶解氧(O_2)饱和度的影响，因此基于生物氧饱和度(ΔO_2/Ar)可以估算海洋混合层群落净生产力。本研究于2015年10月，首次利用膜进样质谱法走航获取了黄东海表层海水中高分辨率O_2/Ar数据，并估算了其NCP,探讨了其分布特征及影响因素。本航次观测到的Δ(O_2/Ar)范围为-30.21%～44.38%,平均值为(0.32±8.29)%,低值主要出现在长江口北侧，而长江口(11.75±13.75)%和浙闽沿岸(5.42±5.21)%的Δ(O_2/Ar)明显高于南黄海(-2.62±5.96)%和东海陆架区(-0.79±5.02)%。南黄海和东海陆架区平均NCP为(-9.24±23.15)和(-4.04±18.68) mmol·m~(-2)·d~(-1),总体表现为异养状态，而长江口和浙闽近岸NCP均值分别为(24.49±35.74)和(10.85±12.17) mmol·m~(-2)·d~(-1)。东、黄海NCP的空间分布格局主要受到陆源输入和水团混合的影响，营养盐和光照也是秋季影响NCP分布的重要因素。本研究有助于深入认识高度动态的东、黄海碳循环过程及控制机制。

关键词(KeyWords)： 东海;黄海;群落净生产力;Δ(O_2/Ar);陆源输入;碳循环

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41776122,42176044);国家自然科学基金联合基金项目(U1806211)资助~~

作者(Author): 韩宗奕,秦川,郑文静,张桂玲,简慧敏

DOI: 10.16441/j.cnki.hdxb.20220336

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