2021—2023年夏季珠江口及毗邻海域水文特征的时空变化

doi:10.11978/2024042

Abstract

Abstract:

Using in-situ data collected by summer cruises during 2021−2023, summer hydrological variations and their influencing factors were studied. The results show that the summer temperature and salinity were charactered by northeast-southwest distribution pattern, while variations in values were significant during the investigation. Mean sea surface temperature (SST) was lowest in 2021 but highest in 2022. Bottom temperature was highest in 2021, but moderate in 2022 and lowest in 2023. Strong runoff caused a significant outward expansion of diluted waters, sea surface salinity (SSS) was strikingly lower in 2022 than those in 2021 and 2023. Bottom salinity was highest in 2023, moderate in 2021 and lower in 2022. Temperature and salinity variations in the middle and low layers were related to the passage of typhoons and invasion of shelf cold and saline water. Those vertical temperature and salinity observed after Typhoon Lupit passed in 2021 mixed homogeneously, weakening stratification. Bottom shelf water intruded into the Lingding Bay, forming a low-temperature zone and apparent salinity front. Middle and bottom temperature (salinity) decreased (increased) owing to the enhanced bottom shelf water intrusion in sequence in 2022 and 2023. In 2023, strong upwelling inhibited the expansion of diluted water seaward to increase SSS over the shelf higher than those in 2021 and 2022. Bottom temperature and salinity varied with the tide, in which the shoreward movement of cold and saline water tended to decrease temperature and increase salinity during flood tide, while the opposite occurred during ebb tide. The positive correlation between SST and air temperature suggested that SST varied with air temperature.

Key words: Pearl River Estuary, hydrology, spatiotemporal variations, shelf water, onshore wind

CLC Number:

P731

GUO Shaojing, ZHANG Xiaobo, CHANG Jinglong, ZHANG Shouwen, JI Xuanliang, MIAO Runqiao, LI Jiandong, ZHU Xueming. Summer hydrological variations during 2021-2023 in the Pearl River Estuary and its adjacent areas[J].Journal of Tropical Oceanography, 2025, 44(1): 108-121.

Figures/Tables 15

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References 19

[1]	陈希荣, 朱佳, 孙振宇, 等, 2018. 2015年7—8月珠江冲淡水扩展特征的观测与分析[J]. 厦门大学学报(自然科学版), 57(6): 841-848.
	CHEN XIRONG, ZHU JIA, SUN ZHENYU, et al, 2018. Observation and analysis of the extension characteristics of the Pearl River Diluted Water from July to August in 2015[J]. Journal of Xiamen University (Natural Science), 57(6): 841-848 (in Chinese with English abstract).
[2]	林卫强, 李适宇, 2002. 夏季伶仃洋COD、DO的垂向分布及其影响因素[J]. 中山大学学报(自然科学版), 41(4): 82-86.
	LIN WEIQIANG, LI SHIYU, 2002. Vertical distribution of COD and DO and its affecting factors in the Pearl River Estuary in summer[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 41(4): 82-86 (in Chinese with English abstract).
[3]	林祖亨, 梁舜华, 1996. 珠江口水域的潮流分析[J]. 海洋通报, 15(2): 11-22.
	LIN ZUHENG, LIANG SHUNHUA, 1996. A study on the tidal currents in the waters of the Pearl River Mouth[J]. Marine Science Bulletin, 15(2): 11-22 (in Chinese with English abstract).
[4]	毛汉礼, 甘子钧, 蓝淑芳, 1963. 长江冲淡水及其混合问题的初步探讨[J]. 海洋与湖沼, 5(3): 183-206.
	MAO HANLI, KAN T, LAN SHUFANG, 1963. A preliminary study of the Yangtze Diluted Water and its mixing processes[J]. Oceanologia Et Limnologia Sinica, 5(3): 183-206 (in Chinese with English abstract).
[5]	宋晓飞, 石荣贵, 孙羚晏, 等, 2014. 珠江口磨刀门盐水入侵的现状与成因分析[J]. 海洋通报, 33(1): 7-15.
	SONG XIAOFEI, SHI RONGGUI, SUN LINGYAN, et al, 2014. Status and cause of saltwater intrusion in Modaomen, Pearl River Estuary[J]. Marine Science Bulletin, 33(1): 7-15 (in Chinese with English abstract).
[6]	伍伯瑜, 1990. 珠江口以西陆架海域环流研究Ⅲ[J]. 台湾海峡, 9(2): 118-126.
	WU BOYU, 1990. A study on the circulation in shelf waters west to Zhujiang River mouth Ⅲ. Shelf circulation model[J]. Journal of Oceanography in Taiwan Strait, 9(2): 118-126 (in Chinese with English abstract).
[7]	夏华永, 刘长建, 王东晓, 2018. 2006年夏季珠江冲淡水驱动的上升流[J]. 海洋学报, 40(7): 43-54.
	XIA HUAYONG, LIU CHANGJIAN, WANG DONGXIAO, 2018. The upwelling driven by the Zhujiang River runoff in 2006 summer[J]. Haiyang Xuebao, 40(7): 43-54 (in Chinese with English abstract).
[8]	夏维, 周争桥, 2021. 基于观测资料的珠江口附近海域夏季气象水文要素分析[J]. 海洋湖沼通报, 43(5): 60-65.
	XIA WEI, ZHOU ZHENGQIAO, 2021. Analysis of meteorological and hydrological elements in the sea around the Pearl River Estuary based on observed data in summer[J]. Transactions of Oceanology and Limnology, 43(5): 60-65 (in Chinese with English abstract).
[9]	杨威, 罗琳, 高永利, 等, 2011. 1999年和2009年夏季珠江口环境要素的对比与分析[J]. 热带海洋学报, 30(4): 16-23.
	YANG WEI, LUO LIN, GAO YONGLI, et al, 2011. Comparison of environmental constituents in the Pearl River Estuary during summer of 1999 and 2009[J]. Journal of Tropical Oceanography, 30(4): 16-23 (in Chinese with English abstract).
[10]	曾淦宁, 胡建宇, 洪华生, 等, 2005. 西南季风不同阶段南海北部珠江口外断面水文调查分析[J]. 热带海洋学报, 24(3): 10-17.
	ZENG GANNING, HU JIANYU, HONG HUASHENG, et al, 2005. Analysis of hydrologic section off Zhujiang River Estuary in northern South China Sea during various southwest Monsoon phases[J]. Journal of Tropical Oceanography, 24(3): 10-17 (in Chinese with English abstract).
[11]	章文, 刘丙军, 陈晓宏, 等, 2013. 珠江口磨刀门水道盐度变化与潮汐过程的相关性分析[J]. 中山大学学报(自然科学版), 52(6): 11-16.
	ZHANG WEN, LIU BINGJUN, CHEN XIAOHONG, et al, 2013. Correlations between salinity and tidal process in Modaomen waterway of the Pearl River Estuary[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 52(6): 11-16 (in Chinese with English abstract).
[12]	张燕, 夏华永, 钱立兵, 等, 2011. 2006年夏、冬季珠江口附近海域水文特征调查分析[J]. 热带海洋学报, 30(1): 20-28.
	ZHANG YAN, XIA HUAYONG, QIAN LIBING, et al, 2011. Analysis on hydrological characteristics off the Pearl River Estuary in summer and winter of 2006[J]. Journal of Tropical Oceanography, 30(1): 20-28 (in Chinese with English abstract).
[13]	赵焕庭, 1990. 珠江河口演变[M]. 北京: 海洋出版社: 116-147 (in Chinese).
[14]	朱佳, 胡建宇, 陈照章, 等, 2005. 珠江口以外海域温、盐度的断面分布特征———2001年5月与2002年11月航次[J]. 厦门大学学报(自然科学版), 44(5): 680-683.
	ZHU JIA, HU JIANYU, CHEN ZHAOZHANG, et al, 2005. Analysis on sectional characteristics of temperature and salinity off the Zhujiang River Estuary-During the cruises of May 2001 and November 2002[J]. Journal of Xiamen University (Natural Science), 44(5): 680-683 (in Chinese with English abstract).
[15]	CHEN XIRONG, SUN ZHENYU, LIN HONGYANG, et al, 2019. Analysis of temperature inversion in the Zhujiang River Estuary in July 2015[J]. Acta Oceanologica Sinica, 38(4): 167-174.
[16]	DONG LIXIAN, SU JILAN, WONG L A, et al, 2004. Seasonal variation and dynamics of the Pearl River plume[J]. Continental Shelf Research, 24(16): 1761-1777.
[17]	GAN JIANPING, LI LI, WANG DONGXIAO, et al, 2009. Interaction of a river plume with coastal upwelling in the northeastern South China Sea[J]. Continental Shelf Research, 29(4): 728-740.
[18]	MAO QINGWEN, SHI PING, YIN KEDONG, et al, 2004. Tides and tidal currents in the Pearl River Estuary[J]. Continental Shelf Research, 24(16): 1797-1808.
[19]	ZHAI WEIDONG, DAI MINHAN, CAI WEIJUN, et al, 2005. High partial pressure of CO₂ and its maintaining mechanism in a subtropical estuary: the Pearl River Estuary, China[J]. Marine Chemistry, 93(1): 21-32.

年份	海温/℃		盐度/‰		密度/(kg·m^-3)
年份	表层	底层	表层	底层	表层	底层
2021	29.4±1.1	25.4±2.9	24.7±8.5	31.1±5.6	1014.3±6.7	1020.4±5.1
2022	30.4±1.1	24.8±3.1	20.4±10.1	28.2±9.4	1010.7±7.4	1018.4±7.9
2023	29.6±0.8	23.1±2.1	28.4±7.1	33.2±3.4	1016.9±5.3	1022.7±3.1

	海温			盐度
	表层	中层	底层	表层	中层	底层
U′	-	-	-	-	-	-
V′	-0.42	-0.46	-0.44	0.42	0.26	0.21
气温	0.36	-0.22	-0.31	0.40	0.38	0.38

Summer hydrological variations during 2021-2023 in the Pearl River Estuary and its adjacent areas

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