Variability in the Global Ocean Carbon Sink From 1959 to 2020 by Correcting Models With Observations
Variability in the Global Ocean Carbon Sink From 1959 to 2020 by Correcting Models With Observations
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DOI：
10.1029/2022gl098632
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发表时间：
2022-07-28
影响因子：
5.2
通讯作者：
McKinley, Galen A.
中科院分区：
文献类型：
--
作者：
Bennington, Val;Gloege, Lucas;McKinley, Galen A.
海洋通过吸收和封存二氧化碳来减少人类对气候的影响。从 20 世纪 50 年代到 80 年代，pCO(2) 和相关海洋碳变量的观测结果稀疏且不确定。因此，全球海洋生物地球化学模型（GOBM）已成为量化海洋碳汇的基础。 LDEO-混合物理数据产品 (LDEO-HPD) 通过使用 GOBM 作为先验，并应用机器学习来估计全覆盖修正，将稀疏的表面海洋 pCO(2) 数据插值到全球覆盖范围。 GOBM 修正的最大组成部分是气候修正。这与最近关于 GOBM 季节性差异较大的发现是一致的，但与长期以来认为年际变化是 GOBM 误差的主要来源的观点形成鲜明对比。这支持使用 1982 年之前模型观测不匹配的气候学将 LDEO-HPD pCO(2) 产品扩展到 1959 年。与 1980 年以后的先前研究一致，1959-2020 年的海气 CO2 通量表明对大气 pCO(2) 增长和火山喷发的响应。
The ocean reduces human impact on the climate by absorbing and sequestering CO2. From 1950s to the 1980s, observations of pCO(2) and related ocean carbon variables were sparse and uncertain. Thus, global ocean biogeochemical models (GOBMs) have been the basis for quantifying the ocean carbon sink. The LDEO-Hybrid Physics Data product (LDEO-HPD) interpolates sparse surface ocean pCO(2) data to global coverage by using GOBMs as priors, and applying machine learning to estimate full-coverage corrections. The largest component of the GOBM corrections are climatological. This is consistent with recent findings of large seasonal discrepancies in GOBMs, but contrasts the long-held view that interannual variability is a major source of GOBM error. This supports extension of the LDEO-HPD pCO(2) product back to 1959, using a climatology of model-observation misfits prior to 1982. Consistent with previous studies for 1980 onward, air-sea CO2 fluxes for 1959-2020 demonstrate response to atmospheric pCO(2) growth and volcanic eruptions.