Description of the 2008 oceanographic conditions on the northeast U.S. continental shelf

"Hydrographic observations from 17 surveys that were conducted on the northeast continental shelf during 2008 are summarized. Contoured distributions of temperature, salinity, density stratification and anomalies are presented for six two-month time periods if coverage was sufficient. Average temperature/salinity values were calculated in five geographic regions over the northeast continental shelf: western Gulf of Maine (GOMW), eastern Gulf of Maine (GOME), Georges Bank (GBNK), northern Mid Atlantic Bight (MABN) and southern Mid Atlantic Bight (MABS). Review of the computed regional average temperature data indicate that surface temperatures were predominately warmer than the reference values in all regions. The eastern Gulf of Maine exhibited slightly colder than expected bottom temperatures for all time periods for which data were available. Regional average salinities were mostly lower, but the largest (negative) anomalies were observed in the Mid-Atlantic Bight. There were localized areas of positive salinities anomalies observed during the year, but these tended to be associated with warm core rings or the variable position of the shelf/slope front. Warmer sea surface temperatures and lower salinities contributed to a higher degree of density stratification along the outer shelf region of the Mid Atlantic Bight during the 2008 summer. The volume of shelf water in the Mid Atlantic regions was high indicating that the shelf / slope front was located further offshore. The northeast climate experienced higher than normal precipitation and slightly warmer air temperatures during 2008"--Abstract. by Maureen H. Taylor, Tamara Holzwarth-Davis, Cristina Bascuñán, and James P. Manning. "August 2009." Includes bibliographical references (page 12).

本文汇总了2008年在东北大陆架开展的17次水文观测数据。当观测覆盖范围足够时，本文给出了6个两个月时段的温度、盐度、密度层结及其异常值的等值线分布。针对东北大陆架的五个地理区域——缅因湾西部（western Gulf of Maine，GOMW）、缅因湾东部（eastern Gulf of Maine，GOME）、乔治浅滩（Georges Bank，GBNK）、中大西洋湾北部（northern Mid Atlantic Bight，MABN）以及中大西洋湾南部（southern Mid Atlantic Bight，MABS）——计算了平均温度与盐度值。对计算得到的区域平均温度数据的分析表明，所有区域的表层温度均整体高于参考值。在所有有可用数据的时段内，缅因湾东部的底层温度均略低于预期值。区域平均盐度整体偏低，但中大西洋湾出现了最大的（负）盐度异常。本年度观测到多处局地正盐度异常区域，这些区域多与暖核环流或陆架-坡锋的可变位置相关。2008年夏季，中大西洋湾外陆架区域的海表温度偏高、盐度偏低，这使得该区域的密度层结程度更高。中大西洋区域的陆架水体量偏高，表明陆架-坡锋位置更偏向远海。2008年，东北区域的气候表现为降水量高于常年均值，气温略偏高。——摘要 作者：莫林·H·泰勒、塔玛拉·霍尔兹沃思-戴维斯、克里斯蒂娜·巴斯库尼安、詹姆斯·P·曼宁，2009年8月，包含参考文献（第12页）。