Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration and Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China.
Mar Pollut Bull. 2019 Sep;146:767-778. doi: 10.1016/j.marpolbul.2019.07.039. Epub 2019 Jul 22.
Various biogeochemical processes complicate carbon dioxide (CO) behaviour in coastal oceans. Through eight summer surveys, detailed variations in CO mechanisms in the urbanized Jiaozhou Bay, China, were analysed. During the rainless period, respiration and dissolved inorganic carbon input from treated wastewater made the northeastern region a strong CO source, while the western region with cleaner seawater was a weak source because calcium carbonate (CaCO) precipitation exceeded primary production. Rainfall events with different intensities and locations caused significantly different effects. When rainfall occurred over the sea, enhanced primary production caused a CO sink; when rainfall induced little terrestrial pollutant input, CaCO precipitation exceeded net primary production, leading to a CO source. When heavy rain caused bulk runoff, the northeastern region was a strong CO source because rivers flowing through downtown regions inputted considerable organic matter, while in the western region, runoff through suburbs and wetlands led to a strong sink.
各种生物地球化学过程使二氧化碳（CO）在沿海水域的行为变得复杂。通过 8 次夏季调查，分析了中国城市化胶州湾 CO 机制的详细变化。在无雨期间，由于处理后的废水带来的呼吸作用和溶解无机碳的输入，使东北部地区成为一个强大的 CO 源，而西部地区由于碳酸钙（CaCO）沉淀超过初级生产力，海水较为清洁，因此是一个较弱的 CO 源。不同强度和位置的降雨事件产生了明显不同的影响。当降雨发生在海上时，增强的初级生产力导致 CO 汇；当降雨导致很少的陆地污染物输入时，CaCO 沉淀超过净初级生产力，导致 CO 源。当强降雨导致大量径流时，由于流经市区的河流输入了大量有机物，东北部地区成为一个强大的 CO 源，而在西部地区，通过郊区和湿地的径流导致一个强大的 CO 汇。
