Processes of coastal ecosystem carbon sequestration and approaches for increasing carbon sink

Carbon sequestration processes and mechanisms in coastal mariculture environments in China

“…Microbes drive carbon sequestration through a series of metabolic activities and form a huge marine organic carbon pool, of which about 97% exists in the form of DOC (Hansell et al, 2009). The key formation processes of carbon sequestration include microbial-driven carbon fixation and generation or release of RDOC (Zhang et al, 2017). The contribution of the MCP to the global oceanic carbon storage can reach 0.2 Pg C yr −1 , which is comparable to that of the BP (Legendre et al, 2015).…”

Discrete Pulses of Cooler Deep Water Can Decelerate Coral Bleaching During Thermal Stress: Implications for Artificial Upwelling During Heat Stress Events

“…So far, this geoengineering technology has mainly been considered for fertilizing purposes, where nutrient-rich deep water (deeper than 100 m) is introduced into nutrient-poor surface waters to increase primary production (Williamson et al, 2009;Fan et al, 2015;Pan et al, 2016). The increase in primary production via AU aims to increase the yield of fisheries (Kirke, 2003;Viúdez et al, 2016), or to increase carbon sequestration, which reduces CO 2 in the ocean and atmosphere (Lovelock and Rapley, 2007;Pan et al, 2015;Zhang et al, 2017). A so far unstudied application of AU is surface water cooling (shown to occur by a modeling study of Oschlies et al, 2010).…”

Energy Management and Operational Planning of an Ecological Engineering for Carbon Sequestration in Coastal Mariculture Environments in China

“…China is under tremendous stress to cope with climate change, which is one of the most serious challenges we face for sustainable development of human society [1,2]. The oceans are the largest carbon pool on earth and have the potential of enhancing marine carbon sequestration.…”

“…The oceans are the largest carbon pool on earth and have the potential of enhancing marine carbon sequestration. Large-scale seaweed aquaculture, as an important approach to counteract the current greenhouse effect and global climate change, has a significant impact on the global carbon cycle [2]. The large-scale seaweed aquaculture can reduce the partial pressure of CO 2 in surface seawater via photosynthesis, which favors diffusion of atmospheric CO 2 into seawater.…”

“…Artificial upwelling, which has attracted increasing attention, is considered a promising way to reduce the accumulation of anthropogenic carbon dioxide in the atmosphere and then stimulate the self-healing capacity of the earth [6]. This practice could transport nutrient-rich bottom water to the surface water, enhance seaweed growth, and consequently increase the net inorganic carbon absorption [2,7]. Under the most optimistic assumptions, artificial upwelling is estimated to have the potential to sequester atmospheric CO 2 at rate of approximately 0.9 Pg C/yr [8], which is almost half the CO 2 uptake rate of the global open ocean [9].…”