Constraining ventilation during deepwater formation using deep ocean measurements of the dissolved gas ratios 40Ar/36Ar, N2/Ar, and Kr/Ar
Constraining ventilation during deepwater formation using deep ocean measurements of the dissolved gas ratios 40Ar/36Ar, N2/Ar, and Kr/Ar
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使用深海溶解气体比率 40Ar/36Ar、N2/Ar 和 Kr/Ar 测量来限制深水形成过程中的通风
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发表时间：
2010
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通讯作者：
R. Hamme
中科院分区：
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作者：
D. Nicholson;S. Emerson;N. Caillon;J. Jouzel;R. Hamme
平衡饱和，对于d 40Ar，相对于空气的值为1.188‰±0.055‰。这些数据被用来在三箱和七箱海洋模式的框架内约束高纬度通风过程。对于三箱模型示踪数据，我们将两个模型中高纬度区域的合适表面积限制为海洋表面积的3.6%(+2.5%，−1.7%)，气泡空气注入速率为22.7(+8.8，−7.3)摩尔空气m−2年−1。七箱模型的结果与之类似，高纬度区域为3.3%(+2.2%，−为1.3%)。我们的结果支持了高纬度通风的有效面积远小于预制营养盐升高区域的说法，并证明了稀有气体对海洋溶解度泵的强烈制约。高纬度表面面积的减少削弱了模型中二氧化碳的溶解度，并限制了大气和深海之间的交流。这些示踪剂应该是usefulconstraintsonhigh‐latitudeventilationandthestrengthofthesolubilitypumpinmore复杂的海洋环流模式。
equilibrium saturation, and for d 40 Ar a value of 1.188‰ ± 0.055‰ relative to air. These data are used to constrain high‐latitude ventilation processes in the framework of three‐box and seven‐box ocean models. For the three‐box model tracer data, we constrain the appropriate surface area of the high‐latitude region in both models to be 3.6% (+2.5%, −1.7%) of ocean surface area and the bubble air injection rate to be 22.7 (+8.8, −7.3) mol air m −2 yr −1 . Results for the seven‐box model were similar, with a high‐latitude area of 3.3% (+2.2%, −1.3%). Our results provide geochemical support for suggestions that the effective area of high‐latitude ventilation is much smaller than the region of elevated preformed nutrients and demonstrate that noble gases strongly constrain the ocean solubility pump. Reducinghigh‐latitude surfaceareaweakens theCO2solubility pumpintheboxmodels and limits communication between the atmosphere and deep ocean. These tracers should be usefulconstraintsonhigh‐latitudeventilationandthestrengthofthesolubilitypumpinmore complex ocean general circulation models.