Circulation and Variability in the Mid-Latitude N. Atlantic Ocean

0219644乔伊斯为首席研究员对北大西洋长期变化的研究提供了为期两年的资金，作为一项基于成就的更新。本研究项目建立在成功的世界海洋环流实验（WOCE）实地项目的基础上，并分析了大部分巡航数据和其他与该地区年代际变化有关的数据。具体研究课题有：(1)52W水文剖面利用原位数据和反演方法继续开展纬向环流研究；(2)对副热带环流年际能量的性质和来源的认识，在长百慕大时间序列和高度计上，副热带环流年际能量似乎都占主导地位；(3)科德角以南坡水区海温异常持续强烈的原因研究；并扩大使用代用数据研究冬季气候变率，可追溯到19世纪，以了解对北大西洋涛动（NAO）敏感性的长期周期。

0219644 JoyceFunding is provided for a two year continuation of the principal investigator's studies on the long-term variability of the North Atlantic as an Accomplishment Based Renewal. This research project builds on the successful field program of the World Ocean Circulation Experiment (WOCE), and the analysis of most of the cruise data and other data relating to decadal variability in the region. The specific topics that will be investigated are: (1) continued studies of zonal circulation using in-situ data and inverse methods for the 52W hydrographic section; (2) understanding of the nature and source of sub-annual energy in the subtropical gyre, which seems to dominate inter-annual energy both in the long Bermuda time series and for the altimeter; (3) investigation of the reason for strong persistence of SST anomalies in the region of the Slope Water south of Cape Cod; and extending the use of proxy data for the study of wintertime climate variability extending back into the 19th century to understand long-term cycles in sensitivity to the North Atlantic Oscillation (NAO).