Xu Dong , Di Qi , Baohong Chen , Yingxu Wu , Xinqing Zheng , Hui Lin
{"title":"人为CO2在沿海珊瑚栖息地调节海洋酸化指标季节性振幅中的差异作用","authors":"Xu Dong , Di Qi , Baohong Chen , Yingxu Wu , Xinqing Zheng , Hui Lin","doi":"10.1016/j.jmarsys.2023.103910","DOIUrl":null,"url":null,"abstract":"<div><p><span>Seasonal-scale local forcings sharply reduce the coastal pH and aragonite saturation state (Ω</span><sub>aragonite</sub><span>). However, habitat-specific seasonality and control change signatures under increasing atmospheric CO</span><sub>2</sub><span> are still poorly characterized. Here, we investigated carbonate system<span> parameter dynamics over a Dongshan coral habitat that is greatly influenced by seasonal current patterns on the western Taiwan Strait coast. Specifically, relatively low pH and Ω</span></span><sub>aragonite</sub> were observed in the trial zone throughout the seasons. Using a first-order Taylor decomposition considering biological carbon metabolism, we suggest that the higher net aerobic respiration related to intense local human activities produced worse ocean acidity in the trial zone. Seasonally, a decreasing Ω<sub>aragonite</sub><span> trend was observed from the transition to the northeast monsoon seasons<span>, mainly controlled by dissolved inorganic carbon (DIC) divergence among seasons. The pH/hydrogen ion concentration ([H</span></span><sup>+</sup><span>]) seasonal cycle was determined by both DIC and temperature components, revealing the lowest/highest value in the southwest monsoon season. Based on ocean acidification scenario modeling forced with a business-as-usual emissions scenario, the Ω</span><sub>aragonite</sub> seasonal amplitude attenuation was projected to exceed 30% during the 21st century. However, [H<sup>+</sup>] seasonal amplitude was amplified over 170%. The attenuation in the Ω<sub>aragonite</sub> seasonal amplitude mainly resulted from an increase in anthropogenic CO<sub>2</sub> seasonal divergence. The increase in [H<sup>+</sup>] seasonal amplitude mostly followed from an increase in the [H<sup>+</sup>] sensitivities to DIC and temperature changes.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Differential roles of anthropogenic CO2 in mediating seasonal amplitudes of ocean acidification metrics over a coastal coral habitat\",\"authors\":\"Xu Dong , Di Qi , Baohong Chen , Yingxu Wu , Xinqing Zheng , Hui Lin\",\"doi\":\"10.1016/j.jmarsys.2023.103910\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span>Seasonal-scale local forcings sharply reduce the coastal pH and aragonite saturation state (Ω</span><sub>aragonite</sub><span>). However, habitat-specific seasonality and control change signatures under increasing atmospheric CO</span><sub>2</sub><span> are still poorly characterized. Here, we investigated carbonate system<span> parameter dynamics over a Dongshan coral habitat that is greatly influenced by seasonal current patterns on the western Taiwan Strait coast. Specifically, relatively low pH and Ω</span></span><sub>aragonite</sub> were observed in the trial zone throughout the seasons. Using a first-order Taylor decomposition considering biological carbon metabolism, we suggest that the higher net aerobic respiration related to intense local human activities produced worse ocean acidity in the trial zone. Seasonally, a decreasing Ω<sub>aragonite</sub><span> trend was observed from the transition to the northeast monsoon seasons<span>, mainly controlled by dissolved inorganic carbon (DIC) divergence among seasons. The pH/hydrogen ion concentration ([H</span></span><sup>+</sup><span>]) seasonal cycle was determined by both DIC and temperature components, revealing the lowest/highest value in the southwest monsoon season. Based on ocean acidification scenario modeling forced with a business-as-usual emissions scenario, the Ω</span><sub>aragonite</sub> seasonal amplitude attenuation was projected to exceed 30% during the 21st century. However, [H<sup>+</sup>] seasonal amplitude was amplified over 170%. The attenuation in the Ω<sub>aragonite</sub> seasonal amplitude mainly resulted from an increase in anthropogenic CO<sub>2</sub> seasonal divergence. The increase in [H<sup>+</sup>] seasonal amplitude mostly followed from an increase in the [H<sup>+</sup>] sensitivities to DIC and temperature changes.</p></div>\",\"PeriodicalId\":50150,\"journal\":{\"name\":\"Journal of Marine Systems\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2023-05-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Marine Systems\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0924796323000544\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Marine Systems","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0924796323000544","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Differential roles of anthropogenic CO2 in mediating seasonal amplitudes of ocean acidification metrics over a coastal coral habitat
Seasonal-scale local forcings sharply reduce the coastal pH and aragonite saturation state (Ωaragonite). However, habitat-specific seasonality and control change signatures under increasing atmospheric CO2 are still poorly characterized. Here, we investigated carbonate system parameter dynamics over a Dongshan coral habitat that is greatly influenced by seasonal current patterns on the western Taiwan Strait coast. Specifically, relatively low pH and Ωaragonite were observed in the trial zone throughout the seasons. Using a first-order Taylor decomposition considering biological carbon metabolism, we suggest that the higher net aerobic respiration related to intense local human activities produced worse ocean acidity in the trial zone. Seasonally, a decreasing Ωaragonite trend was observed from the transition to the northeast monsoon seasons, mainly controlled by dissolved inorganic carbon (DIC) divergence among seasons. The pH/hydrogen ion concentration ([H+]) seasonal cycle was determined by both DIC and temperature components, revealing the lowest/highest value in the southwest monsoon season. Based on ocean acidification scenario modeling forced with a business-as-usual emissions scenario, the Ωaragonite seasonal amplitude attenuation was projected to exceed 30% during the 21st century. However, [H+] seasonal amplitude was amplified over 170%. The attenuation in the Ωaragonite seasonal amplitude mainly resulted from an increase in anthropogenic CO2 seasonal divergence. The increase in [H+] seasonal amplitude mostly followed from an increase in the [H+] sensitivities to DIC and temperature changes.
期刊介绍:
The Journal of Marine Systems provides a medium for interdisciplinary exchange between physical, chemical and biological oceanographers and marine geologists. The journal welcomes original research papers and review articles. Preference will be given to interdisciplinary approaches to marine systems.