基于双浮标连续监测资料分析大亚湾西南部海域水体环境变化特征及其影响因素

doi:10.11978/2023130

Abstract

Abstract:

The monitoring of water quality is very important to understand the changes in marine ecosystem. Based on the continuous monitoring data of two buoys in the southwest of the Daya Bay from 2022 to 2023, this paper analyzes the time series changes in water quality environment. The results showed that the temperature and salinity in the southwest of the Daya Bay were affected by solar radiation and precipitation, with obvious seasonal differences. The temperature and salinity were high in summer and low in winter; chlorophyll a, dissolved oxygen and pH showed obvious diurnal changes. In summer and autumn, the Dapeng Cove was characterized by high temperature, low salinity, low dissolved oxygen, low pH, and high chlorophyll a compared with the Yangmeikeng. Pearson correlation analysis showed that there was a significant correlation among temperature, salinity, dissolved oxygen, pH, and chlorophyll a in summer and autumn, and there were regional differences. Near the bay mouth, waves, upwelling, and other water movements may be the main influencing factors; nearshore, the increase of runoff input may be the primary dominant factor causing changes of water quality. In addition, this article also recorded the impact of distant typhoons causing waves and precipitation events, thus affecting the environment of the Daya Bay. Analyzing the characteristics of the changes in the time series of coastal environmental parameters has important implications for studying the evolutionary characteristics of marine ecosystems.

Key words: Daya Bay, coastal area, environmental parameters, online monitoring, distribution characteristic

XI Chen, LIN Zongxuan, SA Rula, DENG Xi, LIU Qiang, NI Liang, LUO Laicai, MA Teng, XIE Zhijie, CHEN Siruo, CHEN Songze. Analysis of water environmental changes and influencing factors in the southwestern waters of the Daya Bay based on continuous monitoring data from dual buoys[J].Journal of Tropical Oceanography, 2024, 43(4): 153-164.

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站位	纬度	经度	水深/m	时间	备注
FB1	22.5580 N°	114.5733 E°	13	2022/7/19-2023/5/21	杨梅坑近岸
FB2	22.5688 N°	114.5179 E°	7	2022/7/18-2022/12/6	大鹏澳中心

季节	环境参数
季节	温度/℃	盐度/‰	DO/(mg·L⁻¹)	pH	Chl a/(μg·L⁻¹)
春季	21.16±2.18	33.35±1.28	6.95±0.74	8.18±0.20	0.79±0.36
夏季	28.51±2.48	31.72±2.82	7.61±0.86	8.32±0.16	2.31±1.52
秋季	20.41±2.63	32.17±0.81	7.19±0.67	8.31±0.10	1.33±1.15
冬季	16.82±0.59	32.93±0.06	8.75±1.14	8.39±0.10	1.03±0.45
Z	3	3	3	3	3
P	<0.01	<0.01	<0.01	<0.01	<0.01

站位	季节	P
站位	季节	Chl a	DO	温度	盐度	pH
FB1	夏季	4.92×10⁻⁵⁴	1	1	1	1
	秋季	1.28×10⁻²¹	0.00048	0.02037	1	6.54×10⁻⁸
	冬季	2.86×10⁻¹¹	1	1	1	1
	春季	4.92×10⁻⁵⁴	1	1	1	1
FB2	夏季	1.14×10⁻³⁴	4.70×10⁻¹⁰	2.78×10⁻⁸	1	1
	秋季	1.83×10⁻¹²	0.01946	0.00137	1	0.20238

季节	环境参数
季节	温度/℃	盐度/‰	DO/(mg·L⁻¹)	pH	Chl a/(μg·L⁻¹)
FB1_夏季	28.51±2.48	31.72±2.82	7.61±0.86	8.32±0.16	2.31±1.52
FB1_秋季	20.41±2.63	32.17±0.81	7.19±0.67	8.31±0.10	1.33±1.15
FB2_夏季	29.21±2.87	29.08±3.21	7.26±0.97	8.24±0.12	4.00±2.85
FB2_秋季	25.02±0.52	31.80±0.87	6.52±0.76	8.29±0.05	4.45±1.97

	Chl a	DO	温度	盐度	pH
Chl a	1	0.338^**	0.404^**	-0.460^**	0.263^**
DO		1	0.367^**	-0.075^**	0.278^**
温度			1	-0.272^**	0.292^**
盐度				1	-0.584^**
pH					1

Analysis of water environmental changes and influencing factors in the southwestern waters of the Daya Bay based on continuous monitoring data from dual buoys

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	Chl a	DO	温度	盐度	pH
Chl a	1	0.392**	-0.187**	-0.348**	0.195**
DO		1	0.320**	-0.261**	0.258**
温度			1	-0.241**	0.334**
盐度				1	-0.170**
pH					1

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