摘要
通过对太平洋、印度洋、南极普里兹湾表层海水中90 Sr和13 7Cs的分析 ,可以看出北半球放射性水平仍高于南半球 ,南极海域活度最低 ,该海域人工放射性核素仍与大气沉降有关。全球人工放射性活度呈下降趋势 ,但各海区下降的程度不同。南极普里兹湾夏季深层水的涌升是影响该海区放射性水平的一个重要因素。局部区域的人工放射性活度与采样时间和地理位置有关。
Based on the analysis of 90 Sr and 137 Cs in surface seawaters from the Pacific, the Indian Oceans and Prydz Bay in the Antarctic, it bas been found that the radioactive level in the Northern Hemisphere is higher than that in the Southern Hemisphere with the lowest in the Antarctic sea area. The artificial radionuclides in the Antarctic bear a relationship with atmospheric setting. The level of artificial radionuclides on earth shows a decrease tendency and with defferent degree in each sea area. The upwelling of deep seawater in summer in the Prydz Bay, Antarctic is an important factor affecting the radioactive level in this area. The activity of artificial radionuclides in some areas has a relationship to the location and time of sampling.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2000年第3期52-54,共3页
Marine Environmental Science
基金
国家"九五"攻关项目! (98 92 7 0 1 0 5 )
关键词
太平洋
印度洋
海洋监测
放射性物质
锶
采样
Prydz Bay in the Antarctic
the Pacific
the Indian Oceans
upwelling
90 Sr
137 Cs.
