【摘要】 基于2017-10-18航次在胶州湾调查获取的水文、碳化学和叶绿素a（Chl a）等数据与资料,分析了秋季该海域文石饱和度(Ω_{arag（现场）})的分布状况,探讨了影响其空间分布的主要控制因素。结果显示,秋季航次期间胶州湾表层Ω_{arag（现场）}为1.85～2.57,平均值为（2.20±0.24）;其分布具有较大的空间差异,低值位于湾的西部和东北部（<2.05）,高值位于湾口（>2.45）,总体上呈现出由湾口向湾顶逐步降低的趋势。除了通过分析Ω_{arag（现场）}与温度、盐度和Chl a的相关性来定性确定Ω_{arag（现场）}的主控因素外,我们还通过引入总碱度与溶解无机碳的差值作为Ω_{arag（现场）}的指征参数,定量确定了影响Ω_{arag（现场）}空间分布的主要过程及其贡献。研究发现,陆源输入是影响胶州湾秋季Ω_{arag（现场）}空间分布的最重要因素（>50%）,而温度和生物过程的影响相对较小。更多还原

【Abstract】 Surface distribution of aragonite saturation state(Ω_{arag（in situ）}) in the Jiaozhou Bay during the fall was reported based on hydrology, carbonate chemistry and chlorophyll a data collected in the cruise on 2017-10-18. Results show that the surface Ω_{arag（in situ）} ranged from 1.85 to 2.57, with an average of（2.20 ± 0.24）. Ω_{arag（in situ）} showed a large spatial variability, with low values of < 2.05 in the western and northeastern parts of the bay and high values of >2.45 in the mouth of the bay, demonstrating a feature of decreasing from the mouth to the top of the bay. In addition to a correlation analysis（qualitative analysis）of Ω_{arag（in situ）} with sea surface temperature, salinity and chlorophyll a to determine the major factor, a quantitative analysis was conducted via introducing the difference between total alkalinity and dissolved inorganic carbon（TA—DIC） as a indicated parameter of Ω_{arag（in situ）} to identify the main processes and contributions for spatial distribution of Ω_{arag（in situ）}. Our results indicate that terrestrial input is the most important factor for spatial distribution of Ω_{arag（in situ）}（> 50%） in Jiaozhou Bay in the fall, while the contributions of temperature and biological processes are relatively minor.更多还原