The high rate of biological productivity in the North Atlantic is stimulated by the advective supply of nutrients into the region via the Gulf Stream (nutrient stream). It has been proposed that the projected future decline in the Atlantic Meridional Overturning Circulation (AMOC) will cause a reduction in nutrient supply and resulting productivity. In this work, we examine how the nutrient stream changed over the Younger Dryas climate reversal that marked the transition out of the last ice age. Gulf Stream nutrient content decreased, and oxygen content increased at the Florida Straits during this time of weakened AMOC. The decreased nutrient stream was accompanied by a reduction in biological productivity at higher latitudes in the North Atlantic, which supports the link postulated in theoretical and modeling studies.

中文翻译：

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新仙女木气候逆转期间北大西洋营养流减少

北大西洋的高生物生产力是通过墨西哥湾流（营养流）平流向该地区供应营养物质所刺激的。有人提出，预计未来大西洋经向翻转环流（AMOC）的下降将导致养分供应和生产力的减少。在这项工作中，我们研究了新仙女木期气候逆转期间养分流的变化，这标志着上一个冰河时代的过渡。在 AMOC 减弱期间，佛罗里达海峡的墨西哥湾流营养物含量下降，氧气含量增加。营养流的减少伴随着北大西洋高纬度地区生物生产力的下降，这支持了理论和模型研究中假设的联系。