Collaborative Research: Ice-Age and Millennial-Scale Changes of Pacific Intermediate Waters: Ventilation from the Southern Ocean

推荐的建议是在赤道东部和亚热带太平洋进行海洋地质实地考察计划，以研究千年时间尺度上晚更新世期间水团的垂直分布。 拟议工作的目标是：1）作为支持JOIDES ODP 465/ADD提案的取芯和地球物理数据的现场调查，该提案目前被JOIDES SCENTS列为高度优先，极有可能在2001年或2002年进行钻探; 2）记录所获得的沉积物岩心，用于调查赤道东太平洋千年尺度的气候和海洋变化;（3）验证了太平洋盆地中层沃茨幕式通气是南极中层水流动增强的结果。 将利用底栖有孔虫种类和同位素数据研究中层水的性质。通过研究与中间沃茨有关的气候事件的时间和空间分布，将评估这种变化是由南半球还是北方半球驱动的。

99-06778 Pisias99-07292 LyleThe recommended proposal is for a marine geological field program in the eastern equatorial and subtropical Pacific to study vertical water mass distributions during the late Pleistocene on millennial time scales. The object of the proposed work is to: 1) serve as a site survey for both coring and geophysical data in support of the JOIDES ODP Proposal 465/ADD, currently highly ranked by the JOIDES SCICOM with a strong likelihood of drilling in the year 2001 or 2002; 2) document the acquired sediment cores for investigations of millennial-scale climate and ocean variability in the eastern equatorial Pacific; and 3) test the hypothesis that episodic ventilation of the intermediate waters of the Pacific Basin results from intensified flow of Antarctic Intermediate Water. Intermediate water properties will be examined with benthic foraminiferal species and isotopic data. By examining the timing and spatial distribution of climate events associated with intermediate waters, it will be assessed whether such changes are driven from the Southern or Northern Hemispheres.***