厦门大学同位素海洋化学实验室

2020.07.26

14:00-16:55

周隆泉楼

A3-206

赵秀峰

Distribution and export of particulate organic carbon along a transect from shelf to basin in the northern South China Sea

赵秀峰

唐震

Barite separation from marine sediments

杨紫菲

Deficiency of ²²⁶Ra in the north west Pacific sediments

冯娜

Temporal variation of ²³⁴Th flux in Xiamen Bay

报告提要

赵秀峰：1. Stable carbon isotope analysis revealed that distribution of particulate organic carbon (POC) in northern South China Sea (SCS) was not controlled by fluvial input of terrestrial POC. 2. Degradation of POC was more efficient in the basin site than the slope site. More export of carbonate was found in the slope site, resulting in a faster settling speed and less degradation of POC due to the ballast effect. 3. The partition coefficient of ²³⁴Th was significant different between the basin and the slope. The result reflected the discrepancy in the properties of particles and they may have different sources. 4. At the slope site, the fluxes of particulate matters were higher at depth than out of euphotic zone, indicating a signal of lateral transport.

唐震：1. Briefly describe the background of marine barite research and several methods of marine barite separation. 2. Compare and evaluate the experimental results obtained by various barite separation methods. 3. Discuss the barite data in marine sediments.

杨紫菲：1. In the sediment cores collected from north west Pacific, ²²⁶Ra is significantly deficient compared with ²³⁰Th. 2. Using the distribution of activities of ²²⁶Ra and ²³⁰Th to correct Barium flux in the sediments. 3. Calculating flux of ²²⁶Ra from sediment to the overlying water.

冯娜：1. ²³⁴Th deficiency in bottom water. 2. Export flux of ²³⁴Th. 3. Temporal variation of POC flux.

2020.07.27

9:00- 11:00

周隆泉楼

A3-206

陈金旭

The freshwater components of water masses in the Prydz Bay based on oxygen isotope study

江游

江游

Oxygen and radium isotopes in the western Arctic Ocean and East Siberian Sea

陈光辉

Characteristics of oxygen-18 distribution in Amundsen Sea and Ross Sea, Antarctica

报告提要

陈金旭：1. Study area and method. 2. Temporal variation of T/S/δ¹⁸O in different water masses. 3. Result of the freshwater components distribution. 4. Future work.

江游：1. The fractions of river water (f_MW) and sea ice meltwater (f_SIM) were estimated based on the three end−members mixing model. 2．River water derived from the Chukchi shelf and the East Siberia sea was calculated in the Canada basin. 3．The transit time of river water from the Chukchi and East Siberian shelf to the Canada Basin was estimated; 4．The benthic fluxes of ²²⁶Ra and ²²⁸Ra were estimated.

陈光辉：1. Study background. 2. Characteristics of temperatures, salinity and oxygen-18 distribution. 3. Future work.

2020.07.27

14:00-15:30

周隆泉楼

A3-206

14:00-14:30

自由浏览会议海报

14:30-15:15

指导老师点评海报

15:15-15:30

颁奖并合影