An improved comparison of atmospheric Ar/N2 time series and paired ocean‐atmosphere model predictions
An improved comparison of atmospheric Ar/N2 time series and paired ocean‐atmosphere model predictions
复制标题
大气 Ar/N2 时间序列和配对海洋大气模型预测的改进比较
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
M. Battle
中科院分区：
文献类型：
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作者：
N. Cassar;G. McKinley;M. Bender;R. Mika;M. Battle
[1]大气中Ar/N2的变化反映了海洋热通量、海气交换和大气动力学。在这里，大气Ar/N 2时间序列进行比较配对的海洋-大气模型预测。Ar/N 2观测和模拟之间的协议已经改善了以前的研究相比，因为较长的时间序列和自动采样器在几个大气站的介绍，以及完善的成对的海洋-大气模型，包括Ar和N 2作为积极的示踪剂在海洋组件。虽然分析的不确定性和收集文物可能是主要负责观察到的Ar/N 2离群值，空气包裹后向轨迹分析表明，在Ar/N 2测量的一些变化可能是由于低海拔的历史的空气质量收集，并通过扩展，当地的海洋Ar/N 2信号。虽然模拟的气候季节性周期目前可以评估与Ar/N 2观测，更长的时间序列和额外的改进，信噪比将需要测试其他模型的预测，如年际变化，纬度梯度，以及长期增加大气Ar/N 2预计导致海洋变暖。
[1] Ar/N 2 Variations in the atmosphere reflect ocean heat fluxes, air-sea gas exchange, and atmospheric dynamics. Here atmospheric Ar/N 2 time series are compared to paired ocean-atmosphere model predictions. Agreement between Ar/N 2 observations and simulations has improved in comparison to a previous study because of longer time series and the introduction of automated samplers at several of the atmospheric stations, as well as the refinement of the paired ocean-atmosphere models by inclusion of Ar and N 2 as active tracers in the ocean component. Although analytical uncertainties and collection artifacts are likely to be mainly responsible for observed Ar/N 2 outliers, air parcel back-trajectory analysis suggests that some of the variability in Ar/N 2 measurements could be due to the low-altitude history of the air mass collected and, by extension, the local oceanic Ar/N 2 signal. Although the simulated climatological seasonal cycle can currently be evaluated with Ar/N 2 observations, longer time series and additional improvements in the signal-to-noise ratio will be required to test other model predictions such as interannual variability, latitudinal gradients, and the secular increase in atmospheric Ar/N 2 expected to result from ocean warming.