Weidong Zhai

ORCID: 0000-0001-9410-1045
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About
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Research Areas
  • Marine and coastal ecosystems
  • Ocean Acidification Effects and Responses
  • Marine Biology and Ecology Research
  • Oceanographic and Atmospheric Processes
  • Methane Hydrates and Related Phenomena
  • Marine Bivalve and Aquaculture Studies
  • Isotope Analysis in Ecology
  • Coral and Marine Ecosystems Studies
  • Atmospheric and Environmental Gas Dynamics
  • Microbial Community Ecology and Physiology
  • Metal Forming Simulation Techniques
  • Nuclear Materials and Properties
  • Groundwater and Isotope Geochemistry
  • Geology and Paleoclimatology Research
  • High-Temperature Coating Behaviors
  • Advanced Surface Polishing Techniques
  • Metallurgy and Material Forming
  • Coastal wetland ecosystem dynamics
  • Coastal and Marine Management
  • Marine and coastal plant biology
  • Water Quality Monitoring and Analysis
  • High Temperature Alloys and Creep
  • Heavy metals in environment
  • Soil and Water Nutrient Dynamics
  • Wastewater Treatment and Nitrogen Removal

Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
2022-2024

Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
2022-2024

Sun Yat-sen University
2015-2024

Shandong University of Science and Technology
2018-2023

Shandong University
2016-2022

Xiamen University
2011-2021

Dalian Neusoft University of Information
2010-2020

Xi'an Jiaotong University
2020

China National Environmental Monitoring Center
2012-2016

National Marine Environmental Monitoring Center
2012-2016

Abstract. We investigated the spatial distribution and seasonal variation of dissolved inorganic nitrogen in a large perturbed estuary, Pearl River Estuary, based on three cruises conducted winter (January 2005), summer (August 2005) spring (March 2006). On-site incubation was also carried out for determining ammonium nitrite oxidation rates (nitrification rates). observed year-round pattern dramatic decrease NH4+, increase NO3−, but insignificant change NO2− upper estuary at salinity ~0–5....

10.5194/bg-5-1227-2008 article EN cc-by Biogeosciences 2008-09-03

We examined the dynamics of dissolved inorganic nitrogen (DIN, nitrate + nitrite), phosphorus (DIP), and silicate (Si(OH) 4 ) in northern shelf South China Sea summer, which is under a complex hydrodynamic scheme largely shaped by river plume coastal upwelling, along with enhanced biological consumption nutrients therein. The Pearl River plume, high nutrient concentrations (∼ 0.1–14.2 µmol L −1 for DIN, ∼ 0.02–0.10 DIP, 0.2–18.9 Si(OH) ), occupied large area middle (salinity < 33.5)....

10.4319/lo.2012.57.2.0486 article EN Limnology and Oceanography 2012-03-01

A bstract The contemporary coastal ocean, characterized by abundant nutrients and high primary productivity, is generally seen as a significant CO 2 sink at the global scale. However, mechanistic understanding of ocean carbon cycle remains limited, leading to unanswered question why some systems are sources while others sinks atmospheric . Here we proposed distinct physical‐biogeochemical setting, Ocean‐dominated Margin (OceMar), in order for better shaping concept study. OceMars, contrast...

10.1002/grl.50390 article EN Geophysical Research Letters 2013-03-22

We examined diurnal variations of surface seawater p CO 2 (partial pressure ) in a suite coastal marine environmental systems the vicinity South China Sea (SCS) from inshore and nearshore settings Xiamen Bay, Shenhu southwestern Taiwan Strait, to offshore sites basin on slope northern as well coral reef system at Xisha Islands middle SCS. There were significant changes , ranging 1.0 Pa 1.6 (10‐16 µatm) oligotrophic sites, ~4.1 5.1‐15.2 Bay high 60.8 Islands. Processes that modulate these...

10.4319/lo.2009.54.3.0735 article EN Limnology and Oceanography 2009-05-01

National Basic Research Program of China (973 Program) [2009CB421201]; Science Foundation (NSFC) [90711005, 40821063]; NSFC-RGC [40731160624, N_HKUST623/07]; SCOPE project

10.1029/2010jg001596 article EN Journal of Geophysical Research Atmospheres 2011-05-11

Abstract The Changjiang Estuary is a large bifurcated estuary where different hydrodynamic processes influence its South Branch compared to North Branch. the dominant pathway of River discharge, while shallower and narrower dominated by salt water intrusion, especially in dry season. Absorption fluorescence spectroscopy were measured along with dissolved organic carbon (DOC) concentrations characterize properties matter (DOM) collected seasons during an extreme drought year 2011. refractory...

10.1002/2013jg002540 article EN Journal of Geophysical Research Biogeosciences 2014-04-23

Abstract. Ocean acidification, a complex phenomenon that lowers seawater pH, is the net outcome of several contributions. They include dissolution increasing atmospheric CO2 adds up with dissolved inorganic carbon (dissolved CO2, H2CO3, HCO3−, and CO32−) generated upon mineralization primary producers (PP) organic matter (DOM). The aquatic processes leading to are substantially affected by increased DOM nutrients via terrestrial runoff, acidic rainfall, PP algal blooms, nitrification,...

10.5194/bg-13-1767-2016 article EN cc-by Biogeosciences 2016-03-23

Abstract While satellite remote sensing has become a very useful tool contributing to assessments of sea surface partial pressure carbon dioxide ( p CO 2 ) that subsequently allow quantification air‐sea flux, the application empirical approaches in coastal oceans proven challenging owing interaction multiple controlling factors. We propose “mechanistic semi‐analytic algorithm” (MeSAA) estimate river‐dominated using data. Observed can be analytically expressed as sum individual components...

10.1002/2014jc010632 article EN Journal of Geophysical Research Oceans 2015-03-01

Abstract. Based upon eight field surveys conducted between May 2011 and 2012, we investigated seasonal variations in pH, carbonate saturation state of aragonite (Ωarag), ancillary data on the Chinese side North Yellow Sea, a western Pacific continental margin major economic importance. Subsurface waters were CO2-undersaturated nearly equilibrium with atmospheric CO2 June. From July to October, fugacity (fCO2) bottom water gradually increased from 438 ± 44 μatm 630 84 μatm, pHT decreased 8.02...

10.5194/bg-11-1103-2014 article EN cc-by Biogeosciences 2014-02-26

Abstract The Bohai Sea to the west of North Yellow in Northwest Pacific is a semienclosed shallow‐water marginal sea on critical path eutrophication and environmental degradation. To better understand metabolism‐induced summertime dissolved oxygen (DO) decline acidification, eight field surveys were conducted between August 2011 September 2017, investigating seasonal interannual variations DO carbonate system parameters central Sea. historically lowest was recorded at 66 μmol O 2 /kg...

10.1029/2019jg005120 article EN Journal of Geophysical Research Biogeosciences 2019-08-29

Taking the world's largest green tide caused by macroalga Ulva prolifera in South Yellow Sea as a natural case, it is studied here if macroalgae can perform inorganic carbon sequestration ocean. Massive released large amounts of organic carbon, most which were transformed microorganisms into dissolved (DIC). Nearshore field investigations showed that, along with seawater deoxygenation and acidification, both DIC total alkalinity (TAlk) increased significantly (both >50%) areas covered dense...

10.1021/acs.est.2c09261 article EN Environmental Science & Technology 2023-01-24

This paper presents the spatial distribution and seasonal changes of carbonate system CO 2 fluxes in a complex river‐estuary located subtropical region, Pearl River Estuary, based on five surveys covering primarily wet dry cycle two major subestuaries River, namely Lingdingyang Huangmaohai. Significant variations surface water partial pressure ( p ) were observable these subestuaries. While both Huangmaohai had higher their upper estuaries, which quickly decreased downstream as seen many...

10.1029/2008jg000905 article EN Journal of Geophysical Research Atmospheres 2009-09-01
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