Thomas F. Pedersen Stephanie Kienast Lloyd D. Keigwin Laurent Labeyrie John Crusius 2004 <p><span>Elevated productivity in the northwest Pacific is suggested as a new possible control driving past intervals of low-O</span>₂<span><span>&nbsp;</span>intermediate water along the western continental margin of North America. According to this mechanism, O</span>₂<span><span>&nbsp;</span>consumption would occur near the site of formation of North Pacific Intermediate Water (NPIW), due to increased respiration of organic carbon in response to a high-productivity event. Evidence is provided for such a productivity increase during the Bølling-Ållerød interval (14.7–12.9 ka), a time when laminated sediments were deposited along the northern California margin. By this mechanism, low-O</span>₂<span><span>&nbsp;</span>events in intermediate waters off the western North American margin could occur without significant changes in the rate of NPIW ventilation.</span></p> application/pdf 10.1130/G20508.1 en Geological Society of America Influence of northwest Pacific productivity on North Pacific Intermediate Water oxygen concentrations during the Bølling-Ållerød interval (14.7-12.9 ka) article