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标题：North Pacific - North Atlantic linkages during the Last Glacial Termination
本地全文：下载
作者：N. Harada ; A. Timmermann ; M. Sato 等
期刊名称：PAGES News
印刷版ISSN：1811-1602
电子版ISSN：1811-1610
出版年度：2012
卷号：20
期号：2
出版社：PAGES International Project Office
摘要：The mid- to high-latitude region of the western-central North Pacific including its marginal seas is an essential area for un-derstanding paleoclimate change across Asia. Surface seawater conditions such as temperature (SST) and salinity (SSS) in this region play a key role in controlling the sinking branch of the Pacific Meridional Overturning Circulation. For instance, the formation of Dense Shelf Water (Martin et al. 1998) on the continental shelf of the northwestern Okhotsk Sea is affected by autumn SST (Ogi et al. 2001), SSS, and the sea-ice extent (Sakamoto et al. 2005). Sea-ice extent has a direct effect on the volume and characteristics of Okhotsk Sea Intermediate Water, a key component of the North Pacific Intermediate Water (Tally and Nagata 1995). Moreover, large-scale changes of temperature and salinity can Figure 1: Sediment core locations in the western¨Ccentral North Pacific and the Okhotsk and Japan Seas. Numbers indicate the coring sites as in Harada et al. (2012). Arrows show the average direction of flow of surface waters, with red and blue arrows indicating warm and cold currents, respectively. EKC, East Kamchatka Current; WSAW, Western Subarctic Water; ESC, East Sakhalin Current; SWC, Soya Warm Current; TSWC, Tsushima Warm Current; OKIZ, Oyashio¨CKuroshio interfrontal zone; WSG, Western subarctic gyre.weaken the stratification in the Bering Sea and lead to the formation of Pacific deep water, as described in Okazaki et al. (2010).Understanding the drivers of North Pacific surface density changes during the large-scale climate transition of the last deglaciation may provide important in-sights into an often-overlooked branch of the global ocean conveyor belt circulation and its effect on climate and the global carbon cycle