海南东部小海潟湖沉积物地球化学特征及对古台风活动的指示
Geochemical characteristics of sediments in the Xiaohai lagoon (Eastern Hainan) and implications for the paleo-typhoon activities
查看参考文献52篇
文摘
|
为探讨海南东部历史时期的气候环境变化,2015年于海南岛东海岸小海潟湖中采集了一根长73 cm的柱状样(XH15-02),在年代学(210Pb和AMS14C)测试的基础上,开展了多环境代用指标(总有机碳(TOC)、总氮(TN)、有机碳稳定同位素、干密度等)的测试和分析.结果表明,XH15-02柱状样TOC与TN含量有很好的相关性,C/N比值在10.41~ 23.33之间变化,有机碳稳定同位素(δ~(13)Corg)值在-25.14‰~ -23.29‰之间.通过对多气候环境代用指标的分析,以及与历史文献资料和其他自然代用指标的综合比对,认为XH15-02孔岩芯沉积记录了研究区过去1100多年来较为丰富的气候环境、台风活动以及人类活动影响等信息.近千年来,小海潟湖沉积有机物主要以陆源输入为主,据估算该岩芯有机碳陆生来源约占47.00%~ 73.43%,但在不同时期变化幅度较大,该陆源有机碳含量变化可能主要反映了历史时期海南东部地区的干湿变化历史;自1850年以来,XH15-02孔岩芯沉积通量的显著增加与当地人口的快速增长历史一致,反映了研究区近二百年来可能受到的人类对自然界的开发活动影响强烈;多个具有显著偏正δ~(13) Corg记录的时期同史料记载以及周边区域地质记录中的“大风”、“海溢”、“风暴”等事件发生时间较为相近,可能揭示了历史时期的台风或高海平面事件,进而认为小海潟湖沉积在重建历史时期海南地区台风活动等方面具有很大潜力. |
其他语种文摘
|
Coastal lagoons with small catchment influenced both by seawater and river inflow,are highly sensitive to natural processes and anthropogenic activities,which make it ideal regions to study the paleo-environmental and paleo-climatic changes. To better understand the past climatic and environmental changes of the eastern Hainan Island,a 73 cm-long sediment core (XH15-02 core) was collected from the Xiaohai Lagoon,eastern Hainan Island in January,2015.210Pb and AMS14 C dates were determined,respectively, and multiple proxies including the total organic carbon (TOC),total nitrogen (TN),organic carbon stable isotopes (δ~(13)Corg),and dry density,were analyzed. In addition,based on the data mentioned above,deposition rate and flux of sediment and organic carbon were calculated,respectively. The results show that there is a good correlation between the content of TOC and TN; the ratios of C/N show remarkable variations ranging from 10.41- 23.33,and δ~(13) Corg values vary between - 25.14‰ and -23.29‰; and the proportion of terrestrial organic carbon sources vary from 47.00% to 73.43% with some obvious low values during the last 1100 years,the terrestrial organic carbon content may record the precipitation changes in the eastern Hainan during the last millennium. Deposition rate and flux of sediment and organic carbon were relatively steady before 1850s,however,it increased rapidly after 1850s,especially since 1950s. The significant accelerated sedimentation process during the last two hundred years was probably related to the population growth and intensified anthropogenic activities in the Hainan Island at the same period. Based on the analysis of multi-proxies and comparison with the historical literature records and other climatic records from other regions,we assume that the XH15-02 core sediment drilled from the Xiaohai Lagoon may record some high sea level and/or strong typhoon events during the historical period. Especially,our results suggest that the δ~(13)Corg records of XH15-02 core may be a valuable proxy to reconstruct the paleo-typhoon activities during the last millennium. |
来源
|
湖泊科学
,2019,31(6):1758-1769 【核心库】
|
DOI
|
10.18307/2019.0618
|
关键词
|
小海潟湖
;
有机碳同位素
;
人类活动
;
强台风
|
地址
|
1.
华南师范大学地理科学学院, 广州, 510631
2.
中国科学院广州地球化学研究所, 广州, 510640
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
1003-5427 |
学科
|
地质学 |
基金
|
国家自然科学基金面上项目
;
华南师范大学研究生创新计划项目联合资助
|
文献收藏号
|
CSCD:6603784
|
参考文献 共
52
共3页
|
1.
Koop K. Deposition of organic material in a coral reef lagoon,One Tree Island,Great Barrier Reef.
Estuarine Coastal & Shelf Science,1987,25(1):1-9
|
被引
2
次
|
|
|
|
2.
Ryan K E. A record of recent change in terrestrial sedimentation in a coral-reef environment, La Parguera,Puerto Rico: A response to coastal development.
Marine Pollution Bulletin,2008,56(6):1177-1183
|
被引
4
次
|
|
|
|
3.
周亮. 海南岛东南部海湾潟湖沉积和碳埋藏变化研究.
第四纪研究,2016,36(1):66-77
|
被引
3
次
|
|
|
|
4.
Zhou L. Reconstructing Environmental Changes of a Coastal Lagoon with Coral Reefs in Southeastern Hainan Island.
Chinese Geographical Science,2017,27(3):402-414
|
被引
2
次
|
|
|
|
5.
赵宁. 自然和人类活动作用下月湖沉积物有机质来源及其演变.
地球化学,2014,43(4):365-374
|
被引
3
次
|
|
|
|
6.
Storms J E A. Coastal dynamics under conditions of rapid sea-level rise: Late Pleistocene to Early Holocene evolution of barrier-lagoon systems on the northern Adriatic shelf (Italy).
Quaternary Science Reviews,2008,27(11):1107-1123
|
被引
3
次
|
|
|
|
7.
Das O. Reconstruction of paleostorms and paleoenvironment using geochemical proxies archived in the sediments of two coastal lakes in northwest Florida.
Quaternary Science Reviews,2013,68(3):142-153
|
被引
5
次
|
|
|
|
8.
吴慧. 1949-2005年海南岛登陆热带气旋的若干变化特征.
气象研究与应用,2010,31(3):9-12
|
被引
1
次
|
|
|
|
9.
郭丽芬. 海南岛小海潟湖沉积物的地球化学特征.
热带海洋学报,1989,8(3):27-35
|
被引
1
次
|
|
|
|
10.
刘兴健. 海南岛小海潟湖沉积环境演变研究.
海洋通报,2007,26(4):71-79
|
被引
6
次
|
|
|
|
11.
刘兴建. 人类活动对海南省小海潟湖沉积环境的影响.
环境化学,2007,26(3):384-387
|
被引
3
次
|
|
|
|
12.
田向平. 海南小海潟湖环境的破坏与治理.
海洋环境科学,2007,26(1):91-94
|
被引
6
次
|
|
|
|
13.
何为. 海南岛小海潟湖通道治理方案研究.
人民珠江,2005,26(a02):28-30
|
被引
1
次
|
|
|
|
14.
俞琨. 海南小海洪潮特性及洪水位主要影响因素研究.
广东水利水电,2014(3):51-56
|
被引
1
次
|
|
|
|
15.
王世俊. 海南岛小海沙坝-泻湖-潮汐通道体系自动调整及恶化.
台湾海峡,2003,22(2):248-253
|
被引
8
次
|
|
|
|
16.
中国海湾编纂委员会.
中国海湾志第十一分册(海南省海湾),1999
|
被引
2
次
|
|
|
|
17.
Goldberg E D. Rates of sediment accumulation in the Indian Ocean.
Earth Science and Meteoritics,1963,1:90-102
|
被引
10
次
|
|
|
|
18.
Charman D J. Climate-related changes in peatland carbon accumulation during the last millennium.
Biogeosciences,2013,10(2):929-944
|
被引
11
次
|
|
|
|
19.
de Vleeschouwer F. A millennial record of environmental change in peat deposits from the Misten bog (East Belgium).
Quaternary International,2012,268(4):44-57
|
被引
2
次
|
|
|
|
20.
Blaauw M. Flexible paleoclimate age-depth models using an autoregressive gamma process.
Bayesian Analysis,2011,6(3):457-474
|
被引
111
次
|
|
|
|
|