Immediate and Long‐Lasting Impacts of the Mt. Pinatubo Eruption on Ocean Oxygen and Carbon Inventories
Immediate and Long‐Lasting Impacts of the Mt. Pinatubo Eruption on Ocean Oxygen and Carbon Inventories
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DOI：
10.1029/2022gb007513
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发表时间：
2023-01
影响因子：
5.2
通讯作者：
A. Fay;G. McKinley;N. Lovenduski;Y. Eddebbar;Michael N. Levy;M. Long;Holly C. Olivarez;Rea R. Rustagi
中科院分区：
文献类型：
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作者：
A. Fay;G. McKinley;N. Lovenduski;Y. Eddebbar;Michael N. Levy;M. Long;Holly C. Olivarez;Rea R. Rustagi
大规模火山爆发通过辐射通量的重大异常以及由此造成的海面和上层海洋的广泛冷却，造成重大的气候扰动。最近的研究表明，这些喷发也会导致海-气碳和氧通量的重要变化。通过模拟地球系统使用两个初始条件的大型合奏，有和没有气溶胶强迫与山。1991年6月皮纳图博火山爆发，我们隔离的物理和海洋地球化学性质的火山事件的影响。山脉皮纳图博火山爆发迫使显着异常的表面通量和海洋内部库存的热量，氧气和碳。皮纳图博驱动的变化在上层海洋持续多年，并永久改变海洋的热量，氧气和碳库存。氧浓度的正异常在喷发后立即出现，并渗透到深海。相比之下，在喷发后的几年里，海洋上层的碳异常加剧，并且主要局限于150米以上。在热带和北方高纬度地区，氧气的变化主要是由表面冷却和随后的通风到中间深度，而碳异常与溶解度变化和火山爆发产生的厄尔尼诺-南方涛动变率有关。我们没有发现皮纳图博对南大洋氧或碳通量的显着影响，但这可能是由于南半球气溶胶强迫被低估的社区地球系统模型1模拟。
Large volcanic eruptions drive significant climate perturbations through major anomalies in radiative fluxes and the resulting widespread cooling of the surface and upper ocean. Recent studies suggest that these eruptions also drive important variability in air‐sea carbon and oxygen fluxes. By simulating the Earth system using two initial‐condition large ensembles, with and without the aerosol forcing associated with the Mt. Pinatubo eruption in June 1991, we isolate the impact of this volcanic event on physical and biogeochemical properties of the ocean. The Mt. Pinatubo eruption forced significant anomalies in surface fluxes and the ocean interior inventories of heat, oxygen, and carbon. Pinatubo‐driven changes persist for multiple years in the upper ocean and permanently modify the ocean's heat, oxygen, and carbon inventories. Positive anomalies in oxygen concentrations emerge immediately post‐eruption and penetrate into the deep ocean. In contrast, carbon anomalies intensify in the upper ocean over several years post‐eruption, and are largely confined to the upper 150 m. In the tropics and northern high latitudes, the change in oxygen is dominated by surface cooling and subsequent ventilation to mid‐depths, while the carbon anomaly is associated with solubility changes and eruption‐generated El Niño—Southern Oscillation variability. We do not find significant impact of Pinatubo on oxygen or carbon fluxes in the Southern Ocean; but this may be due to Southern Hemisphere aerosol forcing being underestimated in Community Earth System Model 1 simulations.