Volume 41 Issue 6
Jun.  2022
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Nan Zhou, Sumei Liu, Guodong Song, Yunyan Zhang, Lingyan Wang, Xiaoyan Ning. Responses of nutrient biogeochemistry and nitrogen cycle to seasonal upwelling in coastal waters of the eastern Hainan Island[J]. Acta Oceanologica Sinica, 2022, 41(6): 99-113. doi: 10.1007/s13131-021-1934-8
Citation: Nan Zhou, Sumei Liu, Guodong Song, Yunyan Zhang, Lingyan Wang, Xiaoyan Ning. Responses of nutrient biogeochemistry and nitrogen cycle to seasonal upwelling in coastal waters of the eastern Hainan Island[J]. Acta Oceanologica Sinica, 2022, 41(6): 99-113. doi: 10.1007/s13131-021-1934-8

Responses of nutrient biogeochemistry and nitrogen cycle to seasonal upwelling in coastal waters of the eastern Hainan Island

doi: 10.1007/s13131-021-1934-8
Funds:  The National Natural Science Foundation of China under contract No. 41376086; the Taishan Scholars Programme of Shandong Province; the Aoshan Talents Program supported by the Pilot National Laboratory for Marine Science and Technology (Qingdao) under contract No. 2015ASTP-OS08.
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  • Corresponding author: E-mail: sumeiliu@ouc.edu.cn
  • Received Date: 2021-05-31
  • Accepted Date: 2021-10-11
  • Available Online: 2022-03-28
  • Publish Date: 2022-06-16
  • The coastal upwelling has profound influence on the surrounding ecosystem by supplying the nutrient-replete water to the euphotic zone. Nutrient biogeochemistry was investigated in coastal waters of the eastern Hainan Island in summer 2015 and autumn 2016. From perspectives of nutrient dynamics and physical transport, the nutrient fluxes entered the upper 50 m water depth (between the mixed layer and the euphotic zone) arisen from the upwelling were estimated to be 2.5−5.4 mmol/(m2·d), 0.15−0.28 mmol/(m2·d), and 2.2−7.2 mmol/(m2·d) for dissolved inorganic nitrogen (DIN), phosphate (DIP), and dissolved silicate (DSi), respectively, which were around 6- to 12-fold those in the background area. The upwelled nutrients supported an additional plankton growth of (14.70±8.95) mg/m2 for chlorophyll a (Chl a). The distributions of nitrate δ15N and δ18O above the 300 m water depth (top of the North Pacific Intermediate Water) were different among the upwelling area, background area in summer, and the stations in autumn, and the difference of environmental and biogeochemical conditions between seasons should be the reason. The higher DIN/DIP concentration ratio, nitrate concentration anomaly, and lower nitrate isotope anomaly (Δ(15, 18)) in the upper ocean in summer than in autumn indicated the stronger nitrogen fixation and atmospheric deposition, and the following fixed nitrogen regeneration in summer. The higher values of Chl a and nitrate δ15N and δ18O within the euphotic zone in autumn than the background area in summer suggested the stronger nitrate assimilation in autumn. The differences in relatively strength of the assimilation, nitrogen fixation and atmospheric deposition, and the following remineralization and nitrification between the two seasons made the higher δ18O:δ15N and larger difference of enzymatic isotope fractionation factors 15ε and 18ε for nitrate assimilation in summer than in autumn above the North Pacific Tropical Water.
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  • [1]
    Albert A, Echevin V, Lévy M, et al. 2010. Impact of nearshore wind stress curl on coastal circulation and primary productivity in the Peru upwelling system. Journal of Geophysical Research: Oceans, 115(C12): C12033. doi: 10.1029/2010JC006569
    Altabet M A. 2006. Isotopic tracers of the marine nitrogen cycle: present and past. In: Volkman J K, ed. Marine Organic Matter: Biomarkers, Isotopes and DNA. Berlin: Springer, 251–293
    Bombar D, Dippner J W, Doan H N, et al. 2010. Sources of new nitrogen in the Vietnamese upwelling region of the South China Sea. Journal of Geophysical Research: Oceans, 115(C6): C06018
    Bourbonnais A, Lehmann M F, Hamme R C, et al. 2013. Nitrate elimination and regeneration as evidenced by dissolved inorganic nitrogen isotopes in Saanich Inlet, a seasonally anoxic fjord. Marine Chemistry, 157: 194–207. doi: 10.1016/j.marchem.2013.09.006
    Bourbonnais A, Lehmann M F, Waniek J J, et al. 2009. Nitrate isotope anomalies reflect N2 fixation in the Azores Front region (subtropical NE Atlantic). Journal of Geophysical Research: Oceans, 114(C3): C03003
    Buchwald C, Santoro A E, McIlvin M R, et al. 2012. Oxygen isotopic composition of nitrate and nitrite produced by nitrifying cocultures and natural marine assemblages. Limnology and Oceanography, 57(5): 1361–1375. doi: 10.4319/lo.2012.57.5.1361
    Cai Pinghe, Zhao Daochen, Wang Lei, et al. 2015. Role of particle stock and phytoplankton community structure in regulating particulate organic carbon export in a large marginal sea. Journal of Geophysical Research: Oceans, 120(3): 2063–2095. doi: 10.1002/2014JC010432
    Casciotti K L, Buchwald C, McIlvin M. 2013. Implications of nitrate and nitrite isotopic measurements for the mechanisms of nitrogen cycling in the Peru oxygen deficient zone. Deep-Sea Research Part I: Oceanographic Research Papers, 80: 78–93. doi: 10.1016/j.dsr.2013.05.017
    Casciotti K L, Sigman D M, Hastings M G, et al. 2002. Measurement of the oxygen isotopic composition of nitrate in seawater and freshwater using the denitrifier method. Analytical Chemistry, 74(19): 4905–4912. doi: 10.1021/ac020113w
    Casciotti K L, Trull T W, Glover D M, et al. 2008. Constraints on nitrogen cycling at the subtropical North Pacific Station ALOHA from isotopic measurements of nitrate and particulate nitrogen. Deep-Sea Research Part II: Topical Studies in Oceanography, 55(14−15): 1661–1672. doi: 10.1016/j.dsr2.2008.04.017
    Chai Fei, Xue Huijie, Shi Maochong. 2001. Upwelling east of Hainan Island. In: Xue Huijie, Chai Fei, Xu Jianping, eds. Oceanography in China (13)—South China Sea Circulation Modeling and Observations. Beijing: China Ocean Press, 129–137
    Chavez F P, Toggweiler J R. 1995. Physical estimates of global new production: the upwelling contribution. In: Summerhayes C P, Emeis K C, Angel M V, et al., eds. Upwelling in the Ocean: Modern Processes and Ancient Records. Chichester: Wiley, 313–320
    Chen Yuh-ling Lee, Chen Houng-Yung, Lin Yen-Huei, et al. 2014. The relative contributions of unicellular and filamentous diazotrophs to N2 fixation in the South China Sea and the upstream Kuroshio. Deep-Sea Research Part I: Oceanographic Research Papers, 85: 56–71. doi: 10.1016/j.dsr.2013.11.006
    Chen Yuh-ling Lee, Chen Houng Yung, Tuo Sing-how, et al. 2008. Seasonal dynamics of new production from Trichodesmium N2 fixation and nitrate uptake in the upstream Kuroshio and South China Sea basin. Limnology and Oceanography, 53(5): 1705–1721. doi: 10.4319/lo.2008.53.5.1705
    Chen Fajin, Lao Qibin, Zhang Shuwen, et al. 2020. Nitrate sources and biogeochemical processes identified using nitrogen and oxygen isotopes on the eastern coast of Hainan Island. Continental Shelf Research, 207: 104209. doi: 10.1016/j.csr.2020.104209
    Chen Chen-Tung Arthur, Wang Shu-Lun, Wang Bing-Jye, et al. 2001. Nutrient budgets for the South China Sea basin. Marine Chemistry, 75(4): 281–300. doi: 10.1016/S0304-4203(01)00041-X
    Deng Song, Zhong Huanliang, Wang Mingwen, et al. 1995. On relation between upwelling off Qionghai and fishery. Journal of Oceanography in Taiwan Strait, 14(1): 51–56
    Deutsch C, Gruber N, Key R M, et al. 2001. Denitrification and N2 fixation in the Pacific Ocean. Global Biogeochemical Cycles, 15(2): 483–506. doi: 10.1029/2000GB001291
    Granger J, Sigman D M, Lehmann M F, et al. 2008. Nitrogen and oxygen isotope fractionation during dissimilatory nitrate reduction by denitrifying bacteria. Limnology and Oceanography, 53(6): 2533–2545. doi: 10.4319/lo.2008.53.6.2533
    Granger J, Sigman D M, Needoba J A, et al. 2004. Coupled nitrogen and oxygen isotope fractionation of nitrate during assimilation by cultures of marine phytoplankton. Limnology and Oceanography, 49(5): 1763–1773. doi: 10.4319/lo.2004.49.5.1763
    Granger J, Wankel S D. 2016. Isotopic overprinting of nitrification on denitrification as a ubiquitous and unifying feature of environmental nitrogen cycling. Proceedings of the National Academy of Sciences of the United States of America, 113(42): E6391–E6400
    Gruber N, Sarmiento J L. 1997. Global patterns of marine nitrogen fixation and denitrification. Global Biogeochemical Cycles, 11(2): 235–266. doi: 10.1029/97GB00077
    Guan Bingxian, Chen Shangji. 1964. Ocean Current System in East China Sea and South China Sea (in Chinese). Qingdao: The Institute of Oceanology, Chinese Academy of Sciences, 1–85
    Guo Fei, Shi Maochong, Xia Zongwan. 1998. Two-demension diagnose model to calculate upwelling on offshore of the east coast of Hainan Island. Haiyang Xuebao (in Chinese), 20(6): 109–116
    Han Aiqin, Dai Minhan, Kao S J, et al. 2012. Nutrient dynamics and biological consumption in a large continental shelf system under the influence of both a river plume and coastal upwelling. Limnology and Oceanography, 57(2): 486–502. doi: 10.4319/lo.2012.57.2.0486
    Han Wuying, Wang Mingbiao, Ma Kemei. 1990. On the lowest surface water temperature area of China sea in summer—The upwelling along the east coast of Hainan Island. Oceanologia et Limnologia Sinica, 21(3): 267–275
    Herbeck L S, Krumme U, Andersen T J, et al. 2020. Decadal trends in mangrove and pond aquaculture cover on Hainan (China) since 1966: mangrove loss, fragmentation and associated biogeochemical changes. Estuarine, Coastal and Shelf Science, 233: 106531
    Hoering T C, Ford H T. 1960. The isotope effect in the fixation of nitrogen by azotobacter. Journal of the American Chemical Society, 82(2): 376–378. doi: 10.1021/ja01487a031
    Hu Jianyu, Wang Xiaohua. 2016. Progress on upwelling studies in the China seas. Reviews of Geophysics, 54(3): 653–673. doi: 10.1002/2015RG000505
    Huang Ting-Hsuan, Chen Chen-Tung Arthur, Tseng Hsiao Chun, et al. 2017. Riverine carbon fluxes to the South China Sea. Journal of Geophysical Research: Biogeosciences, 122(5): 1239–1259. doi: 10.1002/2016JG003701
    Jia Guodong, Chen Fajin. 2010. Monthly variations in nitrogen isotopes of ammonium and nitrate in wet deposition at Guangzhou, south China. Atmospheric Environment, 44(19): 2309–2315. doi: 10.1016/j.atmosenv.2010.03.041
    Jing Zhiyou, Qi Yiquan, Du Yan. 2011. Upwelling in the continental shelf of northern South China Sea associated with 1997–1998 El Niño. Journal of Geophysical Research: Oceans, 116(C2): C02033
    Jing Zhiyou, Qi Yiyuan, Hua Zulin, et al. 2009. Numerical study on the summer upwelling system in the northern continental shelf of the South China Sea. Continental Shelf Research, 29(2): 467–478. doi: 10.1016/j.csr.2008.11.008
    Kara A B, Rochford P A, Hurlburt H E. 2000. An optimal definition for ocean mixed layer depth. Journal of Geophysical Research: Oceans, 105(C7): 16803–16821. doi: 10.1029/2000JC900072
    Kérouel R, Aminot A. 1997. Fluorometric determination of ammonia in sea and estuarine waters by direct segmented flow analysis. Marine Chemistry, 57(3–4): 265–275. doi: 10.1016/S0304-4203(97)00040-6
    Kim T W, Lee K, Duce R, et al. 2014. Impact of atmospheric nitrogen deposition on phytoplankton productivity in the South China Sea. Geophysical Research Letters, 41(9): 3156–3162. doi: 10.1002/2014GL059665
    Knapp A N, Sigman D M, Lipschultz F. 2005. N isotopic composition of dissolved organic nitrogen and nitrate at the Bermuda Atlantic Time-series study site. Global Biogeochemical Cycles, 19(1): GB1018
    Lehmann N, Granger J, Kienast M, et al. 2018. Isotopic Evidence for the evolution of subsurface nitrate in the western equatorial Pacific. Journal of Geophysical Research: Oceans, 123(3): 1684–1707. doi: 10.1002/2017JC013527
    Li Teng, Bai Yan, He Xianqiang, et al. 2018. The Relationship between POC export efficiency and primary production: opposite on the shelf and basin of the northern South China Sea. Sustainability, 10(10): 3634. doi: 10.3390/su10103634
    Li Ruihuan, Liu Sumei, Li Yanwei, et al. 2014. Nutrient dynamics in tropical rivers, lagoons, and coastal ecosystems of eastern Hainan Island, South China Sea. Biogeosciences, 11(2): 481–506. doi: 10.5194/bg-11-481-2014
    Li Ruihuan, Liu Sumei, Zhang Guiling, et al. 2013. Biogeochemistry of nutrients in an estuary affected by human activities: the Wanquan River estuary, eastern Hainan Island, China. Continental Shelf Research, 57: 18–31. doi: 10.1016/j.csr.2012.02.013
    Li Ruihuan, Xu Jie, Cen Xianrong, et al. 2021. Nitrate fluxes induced by turbulent mixing in dipole eddies in an oligotrophic ocean. Limnology and Oceanography, 66(7): 2842–2854. doi: 10.1002/lno.11794
    Lin Peigen, Cheng Peng, Gan Jianping, et al. 2016. Dynamics of wind-driven upwelling off the northeastern coast of Hainan Island. Journal of Geophysical Research: Oceans, 121(2): 1160–1173. doi: 10.1002/2015JC011000
    Lips I, Lips U, Liblik T. 2009. Consequences of coastal upwelling events on physical and chemical patterns in the central Gulf of Finland (Baltic Sea). Continental Shelf Research, 29(15): 1836–1847. doi: 10.1016/j.csr.2009.06.010
    Liu Sumei, Altabet M A, Zhao Liang, et al. 2017. Tracing nitrogen biogeochemistry during the beginning of a spring phytoplankton bloom in the Yellow Sea using coupled nitrate nitrogen and oxygen isotope ratios. Journal of Geophysical Research: Biogeosciences, 122(10): 2490–2508. doi: 10.1002/2016JG003752
    Liu Sumin, Hong Bo, Wang Guifen, et al. 2020a. Physical structure and phytoplankton community off the eastern Hainan coast during summer 2015. Acta Oceanologica Sinica, 39(11): 103–114. doi: 10.1007/s13131-020-1668-z
    Liu Sumei, Li Ruihuan, Zhang Guiling, et al. 2011. The impact of anthropogenic activities on nutrient dynamics in the tropical Wenchanghe and Wenjiaohe Estuary and Lagoon system in East Hainan, China. Marine Chemistry, 125(1–4): 49–68. doi: 10.1016/j.marchem.2011.02.003
    Liu Sumei, Ning Xiaoyan, Dong Shuhang, et al. 2020b. Source versus recycling influences on the isotopic composition of nitrate and nitrite in the East China Sea. Journal of Geophysical Research: Oceans, 125(8): e2020JC016061
    Liu Yi, Peng Zicheng, Shen Chuanchou, et al. 2013. Recent 121-year variability of western boundary upwelling in the northern South China Sea. Geophysical Research Letters, 40(12): 3180–3183. doi: 10.1002/grl.50381
    Liu Kon-Kee, Su Mei-Jwen, Hsueh Chen-Ru, et al. 1996. The nitrogen isotopic composition of nitrate in the Kuroshio water northeast of Taiwan: evidence for nitrogen fixation as a source of isotopically light nitrate. Marine Chemistry, 54(3–4): 273–292. doi: 10.1016/0304-4203(96)00034-5
    Loick N, Dippner J, Doan H N, et al. 2007. Pelagic nitrogen dynamics in the Vietnamese upwelling area according to stable nitrogen and carbon isotope data. Deep-Sea Research Part I: Oceanographic Research Papers, 54(4): 596–607. doi: 10.1016/j.dsr.2006.12.009
    Luo Xin, Jiao J J, Liu Yi, et al. 2018. Evaluation of water residence time, submarine groundwater discharge, and maximum new production supported by groundwater borne nutrients in a coastal upwelling shelf system. Journal of Geophysical Research: Oceans, 123(1): 631–655. doi: 10.1002/2017JC013398
    Marconi D, Weigand M A, Sigman D M. 2019. Nitrate isotopic gradients in the North Atlantic Ocean and the nitrogen isotopic composition of sinking organic matter. Deep-Sea Research Part I: Oceanographic Research Papers, 145: 109–124. doi: 10.1016/j.dsr.2019.01.010
    Mariotti A, Germon J C, Hubert P, et al. 1981. Experimental determination of nitrogen kinetic isotope fractionation: some principles; illustration for the denitrification and nitrification processes. Plant and Soil, 62(3): 413–430. doi: 10.1007/BF02374138
    McGregor H V, Dima M, Fischer H W, et al. 2007. Rapid 20th-century increase in coastal upwelling off Northwest Africa. Science, 315(5812): 637–639. doi: 10.1126/science.1134839
    Minagawa M, Wada E. 1986. Nitrogen isotope ratios of red tide organisms in the East China Sea: a characterization of biological nitrogen fixation. Marine Chemistry, 19(3): 245–259. doi: 10.1016/0304-4203(86)90026-5
    Needoba J A, Waser N A, Harrison P J, et al. 2003. Nitrogen isotope fractionation in 12 species of marine phytoplankton during growth on nitrate. Marine Ecology Progress Series, 255(24): 81–91
    Ning Xiuren, Chai Fei, Xue Huijie, et al. 2004. Physical-biological oceanographic coupling influencing phytoplankton and primary production in the South China Sea. Journal of Geophysical Research: Oceans, 109(C10): C10005. doi: 10.1029/2004JC002365
    Parsons T R, Maita Y, Lalli C M. 1984. A Manual of Chemical and Biological Methods for Seawater Analysis. Oxford: Pergamon Press, 173
    Pauly D, Christensen V. 1995. Primary production required to sustain global fisheries. Nature, 374(6519): 255–257. doi: 10.1038/374255a0
    Shen S H, Leptoukh G G, Acker J G, et al. 2008. Seasonal variations of chlorophyll a concentration in the northern South China Sea. IEEE Geoscience and Remote Sensing Letters, 5(2): 315–319. doi: 10.1109/LGRS.2008.915932
    Sigman D M, Casciotti K L, Andreani M, et al. 2001. A bacterial method for the nitrogen isotopic analysis of nitrate in seawater and freshwater. Analytical Chemistry, 73(17): 4145–4153. doi: 10.1021/ac010088e
    Sigman D M, DiFiore P J, Hain M P, et al. 2009. The dual isotopes of deep nitrate as a constraint on the cycle and budget of oceanic fixed nitrogen. Deep-Sea Research Part I: Oceanographic Research Papers, 56(9): 1419–1439. doi: 10.1016/j.dsr.2009.04.007
    Sigman D M, Granger J, DiFiore P J, et al. 2005. Coupled nitrogen and oxygen isotope measurements of nitrate along the eastern North Pacific margin. Global Biogeochemical Cycle, 19(4): GB4022
    Song Xingyu, Lai Zhigang, Ji Rubao, et al. 2012. Summertime primary production in northwest South China Sea: Interaction of coastal eddy, upwelling and biological processes. Continental Shelf Research, 48: 110–121. doi: 10.1016/j.csr.2012.07.016
    Su Ni, Du Jinzhou, Ji Tao, et al. 2011a. 226Ra and 228Ra tracer study on nutrient transport in east coastal waters of Hainan Island, China. Water Science and Engineering, 4(2): 157–169
    Su Jian, Pohlmann T. 2009. Wind and topography influence on an upwelling system at the eastern Hainan coast. Journal of Geophysical Research: Oceans, 114(C6): C06017
    Su Jian, Wang Jun, Pohlmann T, et al. 2011b. The influence of meteorological variation on the upwelling system off eastern Hainan during summer 2007–2008. Ocean Dynamics, 61(6): 717–730. doi: 10.1007/s10236-011-0404-9
    Tian Jiwei, Yang Qingxuan, Zhao Wei. 2009. Enhanced diapycnal mixing in the South China Sea. Journal of Physical Oceanography, 39(12): 3191–3203. doi: 10.1175/2009JPO3899.1
    Umezawa Y, Yamaguchi A, Ishizaka J, et al. 2014. Seasonal shifts in the contributions of the Changjiang River and the Kuroshio Current to nitrate dynamics in the continental shelf of the northern East China Sea based on a nitrate dual isotopic composition approach. Biogeosciences, 11(4): 1297–1317. doi: 10.5194/bg-11-1297-2014
    Voss M, Bombar D, Loick N, et al. 2006. Riverine influence on nitrogen fixation in the upwelling region off Vietnam, South China Sea. Geophysical Research Letters, 33(7): L07604
    Wang Dakui, Wang Hui, Li Ming, et al. 2013. Role of Ekman transport versus Ekman pumping in driving summer upwelling in the South China Sea. Journal of Ocean University of China, 12(3): 355–365. doi: 10.1007/s11802-013-1904-7
    Wang Daoru, Yang Yi, Wang Jia, et al. 2015. A modeling study of the effects of river runoff, tides, and surface wind-wave mixing on the eastern and western Hainan upwelling systems of the South China Sea, China. Ocean Dynamics, 65(8): 1143–1164. doi: 10.1007/s10236-015-0857-3
    Wankel S D, Kendall C, Pennington J T, et al. 2007. Nitrification in the euphotic zone as evidenced by nitrate dual isotopic composition: observations from Monterey Bay, California. Global Biogeochemical Cycles, 21(2): GB2009
    Weigand M A, Foriel J, Barnett B, et al. 2016. Updates to instrumentation and protocols for isotopic analysis of nitrate by the denitrifier method. Rapid Communications in Mass Spectrometry, 30(12): 1365–1383. doi: 10.1002/rcm.7570
    Wong George T F, Tseng Chun-Mao, Wen Liang-Saw, et al. 2007. Nutrient dynamics and N-anomaly at the SEATS station. Deep-Sea Research Part II: Topical Studies in Oceanography, 54(14–15): 1528–1545. doi: 10.1016/j.dsr2.2007.05.011
    Wu Meilin, Wang Youshao, Wang Dongxiao, et al. 2014. Effects of coastal upwelling on picophytoplankton distribution off the coast of Zhanjiang in South China Sea. Oceanological and Hydrobiological Studies, 43(3): 283–291. doi: 10.2478/s13545-014-0143-x
    Wu Yunchao, Zhang Jingping, Liu Songlin, et al. 2018. Aerosol concentrations and atmospheric dry deposition fluxes of nutrients over Daya Bay, South China Sea. Marine Pollution Bulletin, 128: 106–114. doi: 10.1016/j.marpolbul.2018.01.019
    Yang Jin-Yu Terence, Hsu Shih-Chieh, Dai Minhan, et al. 2014. Isotopic composition of water-soluble nitrate in bulk atmospheric deposition at Dongsha Island: sources and implications of external N supply to the northern South China Sea. Biogeosciences, 11(7): 1833–1846. doi: 10.5194/bg-11-1833-2014
    You Yuzhu, Chern Ching-Sheng, Yang Yih, et al. 2005. The South China Sea, a cul-de-sac of North Pacific intermediate water. Journal of Oceanography, 61(3): 509–527. doi: 10.1007/s10872-005-0059-6
    Zhang Run, Chen Min, Yang Qing, et al. 2015. Physical-biological coupling of N2 fixation in the northwestern South China Sea coastal upwelling during summer. Limnology and Oceanography, 60(4): 1411–1425. doi: 10.1002/lno.10111
    Zhang Jing, Wang Daoru, Jennerjahn T, et al. 2013. Land–sea interactions at the east coast of Hainan Island, South China Sea: a synthesis. Continental Shelf Research, 57: 132–142. doi: 10.1016/j.csr.2013.01.004
    Zhang Liming, Wei Zhiyuan, Qi Zhiping. 2006. Characteristics of rainfall and evaporation of different region in recent 30 years in Hainan province. Chinese Agricultural Science Bulletin, 22(4): 403–407
    Zhou Nan. 2020. Nutrient dynamics and nitrogen cycle in the northern South China Sea influenced by mesoscale processes [dissertation]. Qingdao: Ocean University of China
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