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A sea trial of enhancing carbon removal from Chinese coastal waters by stimulating seaweed cultivation through artificial upwelling
Applied Ocean Research ( IF 4.3 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.apor.2020.102260 Wei Fan , Zhujun Zhang , Zhongzhi Yao , Canbo Xiao , Yao Zhang , Yongyu Zhang , Jihua Liu , Yanan Di , Ying Chen , Yiwen Pan
Applied Ocean Research ( IF 4.3 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.apor.2020.102260 Wei Fan , Zhujun Zhang , Zhongzhi Yao , Canbo Xiao , Yao Zhang , Yongyu Zhang , Jihua Liu , Yanan Di , Ying Chen , Yiwen Pan
Abstract The potential of artificial upwelling (AU) in enhancing transport of nutrient-rich bottom water to the surface, stimulating seaweed growth and consequently increasing organic carbon removal from coastal waters to land after harvest has attracted increasing scientific interest. This practice, however, hardly have field experiments to confirm the hypothesis. The coastal mariculture environment requires rigid AU system that not only can withstand rough weather conditions but also be effective in fertilizing the surface ocean. In this paper, a new solar-powered, air-lifted AU system was applied to study the potential effect on regional carbon removal. Experiments were conducted in the oligotrophic Aoshan Bay, Shandong Province, China. Comparison of the temperature and nutrient column between AU influenced site and the reference site suggests that the nutrient-rich bottom water has been successfully lifted to the surface. The results show that the growth of seaweeds was effectively stimulated by AU. The average weight of a single plant has increased by 8.98g, and consequently an extra carbon removal potential of 14.8 thousand tons in Chinese coastal waters could be expected if the system can be applied along the Chinese coastal waters.
更新日期：2020-08-01
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