|
|||||
|
|
| 江苏王港盐沼的现代沉积速率 | |
| 引用本文： | 王爱军,高抒,贾建军,潘少明.江苏王港盐沼的现代沉积速率[J].地理学报,2005,15(1):61-70. |
| 作者姓名： | 王爱军 高抒 贾建军 潘少明 |
| 作者单位： | 1. 国家海洋局第三海洋研究所,厦门,361005;南京大学海岸与海岛开发教育部重点实验室,南京,210093 2. 南京大学海岸与海岛开发教育部重点实验室,南京,210093 3. 国家海洋局海底科学重点实验室,国家海洋局第二海洋研究所,杭州,310012 |
| 基金项目： | 国家自然科学基金;国家自然科学基金;高等学校博士学科点专项科研项目 |
| 摘 要： | 江苏海岸湿地总面积超过5000km^2，但围垦活动的加剧使盐沼湿地面积迅速减少；为了达到海岸防护、保滩促淤的目的，先后引种了大米草和互花米草。通过采集江苏王港潮滩盐沼湿地9处柱状样和挖取探槽剖面，以及对沉积剖面样品进行^210Pb和^137Cs测年分析，探讨了^210Pb的本底及影响^210Pb富集的因素，估算了王港盐沼湿地的现代沉积速率。王港潮滩盐沼沉积物对^210Pb的吸附作用较弱；受风暴潮、生物扰动、物源变化及实验误差等因素的影响，在^210Pbex剖面上出现了数据异常点，将这些数据点剔除后计算得到的沉积速率为33cm yr^-1，^137Cs测年显示，该地区1963年以来的平均沉积速率3．1cm yr^-1，与^210Pb法及前人研究结果相一致。根据一个典型剖面的^137Cs测年数据分析，王港潮滩盐沼的沉积过程根据地貌特征的不同可分3个阶段，大米草覆盖阶段滩面高程迅速增加，互花米草的生长提高了滩面淤积速率。 |
| 关 键 词： | 盐沼湿地 沉积速率 210pb和137Cs测年 米草 江苏海岸 |
| 收稿时间： | 2004-08-05 |
| 修稿时间： | 8/5/2004 12:00:00 AM |
CO2 emissions and their bearing on China's economic development: the long view |
|
| WANG Aijun,GAO Shu,JIA Jianjun,PAN Shaoming.CO2 emissions and their bearing on China''s economic development: the long view[J].Acta Geographica Sinica,2005,15(1):61-70. | |
| Authors: | WANG Aijun GAO Shu JIA Jianjun PAN Shaoming |
| Institution: | 1. Third Institute of Oceanography, SOA, Xiamen 361005, China; 2. Ministry of Education Key Laboratory for Coast and Islands Development, Nanjing University, Nanjing 210093, China; 3. Key Laboratory of Geo-Marine Sciences, Second Institute of Oceanography, SOA, Hangzhou 310012, China |
| Abstract: | The total area of coastal wetlands exceeds 5000 km2 in Jiangsu Province, China, but it has been decreasing rapidly as a result of intense reclamation activities. Two types of plants, Spartina angelica and Spartina alterniflora, were introduced successively into the Jiangsu coast, in order to protect the coastline from erosion and to increase the accumulation rate. 210Pb and 137Cs analyses were carried out for sediment samples from the salt marshes of Wangang, to derive the sedimentation rate, on the basis of an evaluation of the background values and factors affecting the enrichment of 210Pb. Analysis of a typical sediment column of the tidal flat shows that the absorption of 210Pb in the silt-dominated sediment is weak. Influences of storm events, bioturbation, material sources and analytical error also have an effect. As a result, some abnormal data points are present. These data were removed before the calculation of the sedimentation rate. The sedimentation rate was 3.3 cm a-1 on average. Based upon analysis of the 137Cs dating, the rate since 1963 was 3.1 cm a-1 on average, similar to the data by 210Pb dating and from previous studies. |
| Keywords: | salt marshes sedimentation rates 210Pb and 137Cs dating Spartina Jiangsu coast |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《地理学报》浏览原始摘要信息 | |
| 点击此处可从《地理学报》下载免费的PDF全文 | |