ABSTRACT

The Gulf of St. Lawrence (GSL) is an Eastern Canada semi-enclosed sea under the influence of the freshwater discharge from the Great Lakes – St. Lawrence River drainage basin. Studying the variability of oceanographic conditions in the GSL under a changing climate is important for ecosystem and fisheries management. To supplement the available in situ sea surface salinity (SSS) measurements with satellite SSS data, this study compares all available years of Soil Moisture Ocean Salinity (SMOS) and Soil Moisture Active and Passive (SMAP) satellite SSS to in situ SSS observations. Despite the relatively cold water and proximity to land and sea ice, the satellite SSS is able to capture the interannual variability and annual cycle of SSS in the GSL, with correlations ranging from 0.80 to 0.85 in the Southern GSL, and 0.22 to 0.77 in the Northern GSL. All satellite SSS data products were able to detect the very low salinity year of 2017 in the Southern GSL.

摘要

圣劳伦斯湾（GSL）是加拿大东部的一个半封闭海，受五大湖-圣劳伦斯河流域淡水排放的影响。研究气候变化下 GSL 海洋条件的变化对于生态系统和渔业管理非常重要。为了用卫星 SSS 数据补充可用的原位海面盐度 (SSS) 测量值，本研究将土壤湿度海洋盐度 (SMOS) 和土壤湿度主动和被动 (SMAP) 卫星 SSS 的所有可用年份与原位 SSS进行了比较SSS 观察。尽管海水相对较冷且靠近陆地和海冰，卫星 SSS 仍能够捕获 GSL 中 SSS 的年际变化和年周期，GSL 南部的相关性范围为 0.80 至 0.85，GSL 南部的相关性范围为 0.22 至 0.77。北方GSL。所有卫星SSS数据产品均能够检测到2017年GSL南部盐度极低的年份。