极端干旱水文年(2011年)夏季珠江口溶解氧的分布特征及影响因素研究
Distribution Characteristics of Dissolved Oxygen and Its Affecting Factors in the Pearl River Estuary During the Summer of the Extremely Drought Hydrological Year 2011
查看参考文献33篇
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文摘
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气候变化背景下,极端气候事件对河口生态环境的影响已引起许多研究者的关注.基于2011年夏季的调查资料,分析了珠江口在极端干旱情况下溶解氧的分布特征及其与海水稳定性、营养盐和浮游植物分解之间的关系,并对河口底层低氧区的成因进行初步探讨.调查结果发现,在珠江特低径流量的情况下,珠江口邻近海域底层明显出现低氧状态,DO的最低值仅为1.38 mg·L~(-1).相关性分析显示,表层水和底层水之间的ΔDO与ΔT、ΔS、ΔDIN、ΔSS和ΔPOC都达到显著相关的水平,其中ΔDO与ΔT和ΔPOC呈极显著的正相关,而与ΔS呈极显著的负相关关系.研究表明,与1999年和2009年夏季不同,2011年夏季珠江口底层低氧环境的形成主要与极端干旱气候下低径流导致河口水体滞留时间延长及颗粒态有机物质在沉降过程中的分解耗氧有关.另外,从最低DO值的角度分析,珠江口季节性缺氧程度在过去20 a间并未呈现显著的变化趋势. |
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其他语种文摘
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More and more attention has focused on assessing impacts of extreme hydrologic events on estuarine ecosystem under the background of climate change.Based on a summer cruise conducted in the Pearl River Estuary in 2011 (extreme drought event), we have investigated the spatial distribution of dissolved oxygen (DO) and its relationships to water column stability, nutrient concentrations, and organic matter; besides, the major reason which caused the oxygen depletion was discussed.Under the influence of the extreme drought event, low bottom water dissolved oxygen was apparent in regions characterized by great depths, with an oxygen minimum value of 1.38 mg·L~(-1).Statistical analysis shows significant correlations among ΔDO, ΔT, ΔS and ΔPOC.A comparison was conducted to show the mechanisms of oxygen depletion during the summers of 1999, 2009 and 2011, respectively.The result indicates that prolonged residence time of water due to the extremely low discharge and the subsequently decomposition of organic substance are major factors causing the formation of hypoxia during the summer drought in 2011.Despite the changing nutrient and organic matter regime in the Pearl River Estuary, there was no apparent trend in the minimum values of DO over the past 2 decades. |
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来源
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环境科学
,2013,34(5):1707-1714 【核心库】
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关键词
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珠江口
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极端干旱事件
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溶解氧
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缺氧
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滞留时间
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地址
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中国科学院南海海洋研究所, 热带海洋环境国家重点实验室;;中国科学院边缘海地质重点实验室, 广州, 510301
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中国科学院南海海洋研究所, 热带海洋环境国家重点实验室, 广州, 510301
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0250-3301 |
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学科
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环境污染及其防治 |
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基金
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广东省908专项
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国家自然科学基金
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中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:4815328
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参考文献 共
33
共2页
|
|
1.
Daiz R J. Spreading dead zones and consequences for marine ecosystems.
Science,2008,321(5891):926-929
|
CSCD被引
191
次
|
|
|
|
|
2.
Rabalais N N. Nutrient changes in the Mississippi River and system responses on the adjacent continental shelf.
Estuaries,1996,19(2):386-407
|
CSCD被引
30
次
|
|
|
|
|
3.
Hagy J D. Hypoxia in Chesapeake Bay, 1950-2001: Long-term change in relation to nutrient loading and river flow.
Estuaries,2004,27(4):634-658
|
CSCD被引
16
次
|
|
|
|
|
4.
Rabalais N N. Gulf of Mexico Hypoxia, a.k.a."The Dead Zone".
Annual Review of Ecology and Systematics,2002,33(1):235-263
|
CSCD被引
26
次
|
|
|
|
|
5.
李道季. 长江口外氧的亏损.
中国科学D辑: 地球科学,2002,32(8):686-694
|
CSCD被引
101
次
|
|
|
|
|
6.
罗琳. 夏季珠江口水域溶解氧的特征及影响因素.
中山大学学报(自然科学版),2005,44(6):910-914
|
CSCD被引
2
次
|
|
|
|
|
7.
张莹莹. 长江口溶解氧的分布特征及影响因素研究.
环境科学,2007,28(8):1649-1654
|
CSCD被引
82
次
|
|
|
|
|
8.
颜天. 香港及珠江口海域有害赤潮发生机制初步探讨.
生态学报,2001,21(10):1634-1641
|
CSCD被引
22
次
|
|
|
|
|
9.
林洪瑛. 珠江口底层海水季节性缺氧现象及其引发CTB的潜在威胁.
湛江海洋大学学报,2001,21(增刊):25-29
|
CSCD被引
18
次
|
|
|
|
|
10.
Yin K D. Temporal and spatial distribution of dissolved oxygen in the Pearl River Estuary and adjacent coastal waters.
Continental Shelf Research,2004,24(16):1935-1948
|
CSCD被引
55
次
|
|
|
|
|
11.
李绪录. 夏季珠江口海区贫氧现象的初步分析.
广东海岛调查研究文集,1992:10-16
|
CSCD被引
3
次
|
|
|
|
|
12.
杨威. 1999年和2009年夏季珠江口环境要素的对比与分析.
热带海洋学报,2011,30(4):16-23
|
CSCD被引
4
次
|
|
|
|
|
13.
Rabalais N N. Global change and eutrophication of coastal waters.
ICES Journal of Marine Science,2009,66(7):1528-1537
|
CSCD被引
23
次
|
|
|
|
|
14.
Sheffield J. Projected changes in drought occurrence under future global warming from multi-model, multi-scenario, IPCC AR4 simulations.
Climate Dynamics,2008,31(1):79-105
|
CSCD被引
41
次
|
|
|
|
|
15.
Wetz M S. Severe droughts reduce estuarine primary productivity with cascading effects on higher tropic levels.
Limnology and Oceanography,2011,56(2):627-638
|
CSCD被引
1
次
|
|
|
|
|
16.
Melrose D C. Hypoxic events in Narragansett Bay, Rhode Island, during the summer of 2001.
Estuaries and Coasts,2007,30(1):47-53
|
CSCD被引
1
次
|
|
|
|
|
17.
吴怡蓉. 7月以来流域降雨偏少珠江防总开展抗旱保供水相关工作.
人民珠江,2011(4):35
|
CSCD被引
1
次
|
|
|
|
|
18.
Parsons T R.
A Manual of Chemical and Biological Methods for Seawater Analysis,1984
|
CSCD被引
97
次
|
|
|
|
|
19.
Garibotti I A. Interannual variability in the distribution of the phytoplankton standing stock across the seasonal sea-ice zone west of the Antarctic Peninsula.
Journal of Plankton Research,2005,27(8):825-843
|
CSCD被引
2
次
|
|
|
|
|
20.
Dai M H. Oxygen depletion in the upper reach of the Pearl River estuary during a winter drought.
Marine Chemistry,2006,102(1/2):159-169
|
CSCD被引
55
次
|
|
|
|
|
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