Browsing by Author "Thomas, Helmuth"
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Item A roadmap for Ocean Negative Carbon Emission eco-engineering in sea-farming fields(The Innovation Geoscience, 2023-09-14) Jiao, Nianzhi; Zhu, Chenba; Liu, Jihua; Luo, Tingwei; Bai, Mindong; Yu, Zhiming; Chen, Quanrui; Rinkevich, Buki; Weinbauer, Markus; Thomas, Helmuth; Fernández-Méndez, Mar; López-Abbate, Celeste; Signori, Camila Negrão; Nagappa, Ramaiah; Koblížek, Michal; Kaartokallio, Hermanni; Hyun, Jung-Ho; Jiao, Fanglue; Chen, Feng; Cai, Wei-JunCarbon neutralization has become a significant, inevitable, and urgent strategy for both adaptation and mitigation of global warming caused by anthropogenic CO2 emissions, and its environmental consequences such as ocean acidification. However, the reduction of anthropogenic CO2 emissions often conflicts with economic development. In contrast, environmentally-friendly negative carbon emissions can be a way of killing two birds with one stone, capturing carbon dioxide and ensuring economic development, and therefore become imperative to achieve carbon-neutral goals.Item Correcting a major error in assessing organic carbon pollution in natural waters(Science Advances, 2021-04-14) Jiao, Nianzhi; Liu, Jihua; Edwards, Bethanie; Lv, Zongqing; Cai, Ruanhong; Liu,Yongqin; Xiao, Xilin; Wang, Jianning; Jiao, Fanglue; Wang, Rui; Huang, Xingyu; Guo, Bixi; Sun, Jia; Zhang, Rui; Zhang, Yao; Tang, Kai; Zheng, Qiang; Azam, Farooq; Batt, John; Cai, Wei-Jun; He, Chen; Herndl, Gerhard J.; Hill, Paul; Hutchins, David; LaRoche, Julie; Lewis, Marlon; MacIntyre, Hugh; Polimene, Luca; Robinson, Carol; Shi, Quan; Suttle, Curtis A.; Thomas, Helmuth; Wallace, Douglas; Legendre, LouisMicrobial degradation of dissolved organic carbon (DOC) in aquatic environments can cause oxygen depletion, water acidification, and CO2 emissions. These problems are caused by labile DOC (LDOC) and not refractory DOC (RDOC) that resists degradation and is thus a carbon sink. For nearly a century, chemical oxygen demand (COD) has been widely used for assessment of organic pollution in aquatic systems. Here, we show through a multicountry survey and experimental studies that COD is not an appropriate proxy of microbial degradability of organic matter because it oxidizes both LDOC and RDOC, and the latter contributes up to 90% of DOC in high-latitude forested areas. Hence, COD measurements do not provide appropriate scientific information on organic pollution in natural waters and can mislead environmental policies. We propose the replacement of the COD method with an optode-based biological oxygen demand method to accurately and efficiently assess organic pollution in natural aquatic environments.