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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Slope water, Gulf Stream, and seasonal influences on southern Mid-Atlantic Bight circulation during the fall-winter transition
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Slope water, Gulf Stream, and seasonal influences on southern Mid-Atlantic Bight circulation during the fall-winter transition

机译：秋冬过渡期间，斜坡水，墨西哥湾流和季节性影响对南部中大西洋海岸线的环流

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摘要

Observations from autumn 2000 near the shelfbreak front in the Middle Atlantic Bight are used to describe the transition from stratified summer conditions to well-mixed winter conditions over the shelf. During the observational period, the front differed dramatically from climatological conditions, with buoyant Gulf Stream water found shoreward over the subsurface shelfbreak front. Water mass analysis shows a large number of separate water masses with shelf, slope, and Gulf Stream origins. The coolest shelf water was located at the shelfbreak and may be related to “cold pool” water masses observed to the north during summer. Shoreward of this shelfbreak water mass, a mid-shelf front was present which intersected the bottom at the 50-m isobath. High-volume transports were associated with both the shelfbreak and mid-shelf fronts. Transport estimates from the cross-shelf sections were approximately 1 Sverdrup, which is large relative to previous estimates of shelf transport. The foot of the front was near the 130-m isobath, much deeper than the climatological position near the 75-m isobath; however, this is consistent with a recent theory relating the magnitude of alongshelf transport to the depth at which the front intersects the bottom.
机译：从2000年秋季开始，在中大西洋大西洋中大陆架断裂带前部附近进行观测，以描述该大陆架从分层夏季条件到混合冬季条件的转变。在观测期间，该锋面与气候条件有很大的不同，在地下架子断裂锋面的岸上发现了活跃的墨西哥湾流水。水质分析显示了大量独立的水质，具有陆架，斜坡和湾流起源。最凉爽的架子水位于架子断裂处，并且可能与夏季北部观测到的“冷池”水团有关。在这个棚架破裂水体的岸边，存在一个中层前缘，该前缘与等深线50米处的底部相交。大量运输与货架期和货架中期有关。跨架部分的运输量估计约为1 Sverdrup，相对于先前的架子运输量而言，这是很大的。前脚在等深线130米处，比等深线75米处的气候位置深得多。但是，这与最近的理论相一致，该理论将沿架运输的幅度与前缘与底部相交的深度有关。

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