Seasonal variation and dynamics of the Pearl River plume

Li, Dong; Su, Jilan; Wong, Lai Ah; Cao, Zhenyu; Chen, Jay-Chung

doi:10.1016/j.csr.2004.06.006

Cited by 212 publications

(138 citation statements)

References 11 publications

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“…Homogeneous water column for temperature was observed with the slight difference in temperature of upper and the lower column. Homogenous vertical water column was affected by the mixing that wasinduced bystrong winds and the low freshwater discharge [8]. Ranging at 29-30 °C, the stratification was not distinct.…”

Section: Resultsmentioning

confidence: 97%

“…Monsoonal wind plays an important factor in determining the vertical and horizontal distribution of plume [8]. Several studies related to season and monsoon's influence have been conducted [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies related to season and monsoon's influence have been conducted [8][9][10]. The hydrodynamics and biogeochemistry in the South China Sea and its adjacent waters shows variability due to the influence from The Asian Monsoon.…”

Section: Introductionmentioning

confidence: 99%

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Vertical distribution of Pahang River plume

Taher

Lihan²,

Mustapha³

2013

AIP Conference Proceedings

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Abstract. Large rivers transported high amount of discharge towards the sea and induced the river plume formation. The contents of the plume consist of suspended solids, nutrients, pollutants and other particles. Productivity at estuary depends on the organic and nutrient contents from the river discharge. Due to many possible factors, the dispersal of the plume shows spatial variation horizontally and vertically. The monsoonal wind is a factor that effecting plume vertical profile pattern. This study determines the vertical distribution pattern of the plumeat Pahang River through field observation. Several water parameters were measured during cruises conducted at respective monsoon. Data collected includes depth, chlorophyll-a, salinity, temperature and suspended particulate matter. Depth at Pahang's offshore usually does not reached more than 15 m depth because of the shallow continental shelf at South China Sea. The plume has higher concentration at the mouth of the river which causes the area to be less saline and it decreases as the station furthers from the river. Chlorophyll-a is distributed mainly at the surface level where the area is warmer and received freshwater runoff. Suspended particulate matter shows downward distribution from the front of the estuary towards deep water column depth (10 m). Temperature pattern shows warmer surface layer with depth less than 5 m while deeper water column has lower temperature. Vertical profile pattern of Pahang River plume generally shows slight difference between each monsoon by referring to particular parameter.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Vertical distribution of Pahang River plume

Taher

Lihan²,

Mustapha³

2013

AIP Conference Proceedings

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“…Temporal distribution of POC differed greatly with discharge changing in an identical season, with higher POC concentration observed following greater discharge. During the wet season, the plume of the Pearl River flows eastward and offshore under the impact of southwest wind [17,44]. Therefore, POC concentrations south of Hong Kong in summer were greater than those in other seasons ( Figure 5).…”

Section: Impact Factors On Poc Distribution In the Prementioning

confidence: 99%

“…Therefore, POC concentrations south of Hong Kong in summer were greater than those in other seasons ( Figure 5). However, the plume is advected westward due to northeast wind during the dry season, so the eastward expansion of high POC concentrations is much smaller in winter and spring [17,44]. The high POC concentrations around the Wanshan Archipelago might be due to high phytoplankton production in low velocity water or POC discharged from surrounding islands.…”

Section: Impact Factors On Poc Distribution In the Prementioning

confidence: 99%

Remote Sensing Observation of Particulate Organic Carbon in the Pearl River Estuary

et al. 2015

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River estuaries are connectors of terrestrial and marine ecosystems. Riverine particulate organic carbon (POC) is discharged into oceans after a series of biogeochemical reactions in estuaries. Satellite monitoring of POC will improve our understanding of the carbon dynamics of these water bodies. Based on in situ data from four seasonal survey cruises, we developed an algorithm for estimating POC concentrations in the Pearl River Estuary (PRE). Reflectance ratios, Rrs(678)/Rrs(488) and Rrs(748)/Rrs(412), were set as inputs to calculate POC concentration in the PRE. The algorithm was then applied to MODIS/AQUA data to inverse POC concentrations in the PRE from 2002 to 2014. Additionally, sources, impact factors, and seasonal distributions of POC were also investigated. Phytoplankton contributed more to POC in off-shore waters than that in in-shore waters in autumn and spring, but showed the opposite pattern in winter. Under the influence of freshwater from the Pearl River, underwater topography, tides, winds, etc., the seasonal POC concentrations along a specific section, vertical to water depth gradient, decreased in different seasons. These decreases could be described by exponential functions (y = ae bx , b < 0). The distribution of POC concentrations in the PRE resulted from complex physical and biogeochemical processes, which can change spatially and seasonally.

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Observations and numerical modeling of the Pearl River plume in summer season

Pan

Wang

2014

J. Geophys. Res. Oceans

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A cruise survey of the Pearl River plume during southeasterly and southwesterly winds, two typical wind patterns in summer in Guangdong coastal waters, is reported and the cruise data are analyzed to unveil the plume dynamics. The Kelvin number is derived from the in situ data, revealing that the Pearl River plume exhibits two different scales in response to the two kinds of the wind forcing. Numerical model simulations based on the regional oceanic modeling system (ROMS) with nesting domains are implemented to explore details of the plume dynamics, validated by cruise observations and tidal gauge sea level data. Modeling results suggest that there is a subtidal, anticyclonic recirculation bulge on the west side out of the estuary mouth under southeasterly winds, showing a recirculating plume in the near-field. When the wind changes to the southwesterly, however, the recirculating plume vanishes. The distinct, supercritical tidal plume front occurs with southeasterly winds prevailing in spring tide due to the strong advection in the tidal plume. The tidal salt deficit flux can reach as high as 12.5% of the mean current flux, and illustrates the combined forcing of tide and wind.

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Seasonal variation and dynamics of the Pearl River plume

Cited by 212 publications

References 11 publications

Vertical distribution of Pahang River plume

Vertical distribution of Pahang River plume

Remote Sensing Observation of Particulate Organic Carbon in the Pearl River Estuary

Observations and numerical modeling of the Pearl River plume in summer season

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