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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Th-214 : U-238 disequilibrium as an indicator of sediment resuspension in Thermaikos Gulf, northwestern Aegean Sea
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Th-214 : U-238 disequilibrium as an indicator of sediment resuspension in Thermaikos Gulf, northwestern Aegean Sea

机译：Th-214：U-238不平衡，是爱琴海西北部特尔迈科斯海湾沉积物重新悬浮的指标

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摘要

Th-234:U-238 disequilibria have been used extensively as tracers of particle dynamics in marine environments. Th-234 (t(1/2) = 24.1 days) can be used as "proxy" for particle reactive pollutants, due to their similar rapid rate of scavenging onto particles and subsequent removal from the water column, to the sediments. Radioactive disequilibrium can be exploited to determine the rates and time-scales of processes occurring over days to months; in this instance the residence times of dissolved and particulate species with the benthic nepheloid layer (BNL). Three sampling cruises were undertaken in Thermaikos Gulf (NW Aegean Sea) during contrasting periods, to examine the impact of natural and anthropogenic activity on sediment resuspension. September and October 2001 represented background and trawling periods, respectively; January 2002 represented a mixed period, of trawling and storms.
机译：Th-234：U-238不平衡已被广泛用作海洋环境中粒子动力学的示踪剂。 Th-234（t（1/2）= 24.1天）可以用作颗粒反应性污染物的“代理”，因为它们的清除速率与清除颗粒相似，并随后从水柱中移至沉积物，具有相似的快速速率。可以利用放射性不平衡来确定几天到几个月内发生的过程的速率和时标。在这种情况下，溶解的和颗粒状物质与底栖性肾上腺素层（BNL）的停留时间。在对比期间，在Thermaikos海湾（爱琴海西北部）进行了三次采样航行，以检查自然活动和人为活动对沉积物再悬浮的影响。 2001年9月和2001年10月分别是背景时期和拖网时期。 2002年1月是拖网和暴风雨混合的时期。

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