Seasonal salt budget in the northeast Pacific Ocean
Seasonal salt budget in the northeast Pacific Ocean
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DOI：
10.1029/2009jc005307
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发表时间：
2008-12
影响因子：
--
通讯作者：
L. Ren;S. Riser
中科院分区：
文献类型：
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作者：
L. Ren;S. Riser
[1]利用5年（2003-2007）Argo剖面浮子资料、降水和蒸发、地转速度资料和风应力观测资料对亚北极太平洋东北部混合层盐度收支进行了评估。该地区混合层盐度具有很强的季节性循环，主要受降水、蒸发、Ekman平流和夹带的季节性驱动。地转平流效应表现出相对较小的季节变化。该地区的降水和Ekman效应通常导致盐度净下降，而蒸发、地转平流和夹带项产量增加。在年周期内，盐度趋势在冬季和秋季为正，由地表通量（蒸发和降水）、夹带和地转平流平衡。春季和夏季盐度趋势为负。在这两个季节，盐度似乎是由降水、蒸发和地转平流控制的。总体而言，降水期对季节盐度收支的贡献最大，其中秋冬季的盐度收支尤其重要。
[1] The mixed layer salinity budget in the northeastern subarctic Pacific is evaluated using 5 years (2003–2007) of Argo profiling float data, precipitation and evaporation, geostrophic velocity data, and wind stress observations. In this region the mixed layer salinity has a strong seasonal cycle, driven by seasonality in precipitation, evaporation, Ekman advection, and entrainment. Geostrophic advection effects show relatively little seasonal variability. Precipitation and Ekman effects in this area generally result in net decreases in salinity, while the evaporation, geostrophic advection, and entrainment terms yield increases. Within an annual cycle, the salinity tendency is positive during winter and fall, balanced by surface fluxes (evaporation and precipitation), entrainment, and geostrophic advection. The salinity tendency is negative during spring and summer. During these two seasons, it appears that salinity is controlled by precipitation, evaporation, and geostrophic advection. Overall, the precipitation term makes the largest contribution to the seasonal salinity budget, and the entrainment is especially important in autumn and winter.