Buesseler Ken O, Lamborg Carl H, Boyd Philip W, Lam Phoebe J, Trull Thomas W, Bidigare Robert R, Bishop James K B, Casciotti Karen L, Dehairs Frank, Elskens Marc, Honda Makio, Karl David M, Siegel David A, Silver Mary W, Steinberg Deborah K, Valdes Jim, Van Mooy Benjamin, Wilson Stephanie
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
Science. 2007 Apr 27;316(5824):567-70. doi: 10.1126/science.1137959.
The oceanic biological pump drives sequestration of carbon dioxide in the deep sea via sinking particles. Rapid biological consumption and remineralization of carbon in the "twilight zone" (depths between the euphotic zone and 1000 meters) reduce the efficiency of sequestration. By using neutrally buoyant sediment traps to sample this chronically understudied realm, we measured a transfer efficiency of sinking particulate organic carbon between 150 and 500 meters of 20 and 50% at two contrasting sites. This large variability in transfer efficiency is poorly represented in biogeochemical models. If applied globally, this is equivalent to a difference in carbon sequestration of more than 3 petagrams of carbon per year.
海洋生物泵通过沉降颗粒推动深海中二氧化碳的封存。在“暮光带”（光合层与1000米之间的深度）中，碳的快速生物消耗和再矿化降低了封存效率。通过使用中性浮力沉积物捕集器对这个长期以来研究不足的区域进行采样，我们在两个对比站点测量了150至500米深度之间沉降颗粒有机碳的转移效率，分别为20%和50%。生物地球化学模型很难体现这种转移效率的巨大差异。如果将其应用于全球范围，这相当于每年碳封存差异超过3拍克碳。
