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

99-06778皮西亚斯99-07292莱尔建议在赤道东部和亚热带太平洋建立一个海洋地质野外项目，研究晚更新世期间千年时间尺度上的垂直水团分布。拟议工作的目的是：1)作为支持JOIDES ODP465/ADD建议的取芯和地球物理数据的现场勘测，JOIDES SCICOM目前对该建议的评级很高，很有可能在2001年或2002年进行钻探；2)记录所获得的沉积物岩心，用于调查赤道太平洋东部千年尺度的气候和海洋变异性；以及3)检验太平洋盆地中间水的阶段性通风是由于南极中间水的流动加强的假设。将用底栖有孔虫物种和同位素数据检查中间水的性质。通过研究与中间水域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.***