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首页> 外文会议>International Union of Geodesy and Geophysics >Seasonal changes in the radium-226 distribution on the southeastern USA continental shelf: implications for changing submarine groundwater discharge
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Seasonal changes in the radium-226 distribution on the southeastern USA continental shelf: implications for changing submarine groundwater discharge

机译：美国东南部大陆架上镭升温的季节性变化：改变潜艇地下水排放的含义

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Enrichments of radium isotopes in coastal waters have served as indicators of submarine groundwatei discharge (SGD), Because coastal waters exchange with the open ocean on a time scale of weeks to months, seasonal patterns of radium isotope distribution may be used to indicate changes in SGD through the year, Here I report the seasonal distributions of 226Ra measured in surface waters of the continental shelf of southeastern USA. The study area encompassed most of the South Atlantic Bight. Activities of 22 Ra were highest off the coast of Georgia. In summer, these high activities extended throughout the study area; but during spring and winter they decreased markedly off the coast of South Carolina. The primary source of excess 226Ra (that is activities in excess of open ocean values) is SGD. Because the activities of 226Ra in SGD vary little with season, the lower excess activities off South Carolina imply lower rates of SGD during the spring and winter.
机译：沿海水域镭同位素的富集曾担任潜艇地下水的指标（SGD），因为沿海水在几周到几个月的时间范围内交换了开阔的海洋，镭同位素分布的季节性模式可用于表明SGD的变化在今年，我在这里举报了美国大陆架的地表水域测量的226RA季节性分布。研究区包括大多数南大西洋。 22 ra的活动是格鲁吉亚海岸最高的。夏季，这些高活动延长了整个研究区;但在春天和冬天，他们显着下降了南卡罗来纳州的海岸。超过226ra的主要来源（即超过开放海洋价值的活动）是SGD。由于SGD中226ra的活动与季节不同，因此南卡罗来纳州的较低的活动较低，春季和冬季的SGD率较低。

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