Process study of circulation in the Pearl River Estuary and adjacent coastal waters in the wet season using a triply-nested circulation model

2011 ◽  
Vol 38 (1-2) ◽  
pp. 138-160 ◽  
Author(s):  
Xiaomei Ji ◽  
Jinyu Sheng ◽  
Liqun Tang ◽  
Dabin Liu ◽  
Xuelian Yang
Keyword(s):  
Coastal Waters ◽  
River Estuary ◽  
Circulation Model ◽  
Pearl River Estuary ◽  
Pearl River ◽  
Wet Season ◽  
The Pearl River Estuary ◽  
Process Study ◽  
The Pearl River

Transport of riverine sediment from different outlets in the Pearl River Estuary during the wet season

2019 ◽  
Vol 415 ◽  
pp. 105957 ◽  
Author(s):  
Guang Zhang ◽  
Weicong Cheng ◽  
Lianghong Chen ◽  
Heng Zhang ◽  
Wenping Gong
Keyword(s):  
River Estuary ◽  
Pearl River Estuary ◽  
Pearl River ◽  
Wet Season ◽  
The Pearl River Estuary ◽  
Riverine Sediment ◽  
The Pearl River

scholarly journals Influence of seasonal monsoons on net community production and CO<sub>2</sub> in subtropical Hong Kong coastal waters

2011 ◽  
Vol 8 (2) ◽  
pp. 289-300 ◽  
Author(s):  
X.-C. Yuan ◽  
K. Yin ◽  
W.-J. Cai ◽  
A. Y. Ho ◽  
J. Xu ◽  
...  
Keyword(s):  
Hong Kong ◽  
Coastal Waters ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Pearl River ◽  
Wet Season ◽  
Net Community Production ◽  
The Pearl River ◽  
Hong Kong Coastal Waters ◽  
Community Production

Abstract. Data from seven cruises in three different environments including the Pearl River estuary, sewage discharge outfall, and eastern coastal/shelf waters were used to examine the seasonal variations in net community production (NCP) and the biologically active gases O2 and CO2. In the winter dry season, when monsoon-induced downwelling was dominant, NCP was negative (−84 ± 50 mmol C m−2 d−1) in all three regions. The negative NCP corresponded to O2 influxes of 100 ± 50 mmol O2 m−2 d−1 and CO2 effluxes of 24 ± 10 mmol C m−2 d−1. In the summer wet season, when upwelling brought the deep oceanic waters to the coast due to the southwest monsoonal winds, there was a 2 to 15-fold increase in integrated primary production (IPP) compared to winter. The increase in IPP was likely due to the favorable conditions such as stratification and the nutrient inputs from upwelled waters and the Pearl River estuary. NCP in the mixed layer reached up to 110 ± 48 mmol C m−2 d−1 in the wet season. However, accompanying the high positive NCP, we observed an O2 influx of 100 ± 60 mmol O2 m−2 d−1 and CO2 efflux of 21 ± 15 mmol C m−2 d−1. The contradictory observation of positive NCP and CO2 release and O2 uptake in the mixed layer could be explained by the influence of the southwest monsoon-induced upwelling along with the influence of the Pearl River, as the upwelling brought cold, low dissolved oxygen (DO, 160 ± 30 μM) and high dissolved inorganic carbon (DIC, 1960 ± 100 μatm) water to the surface in the wet season. Hence, the subtropical Hong Kong coastal waters are generally a CO2 source due to the monsoonal influence during both the dry-heterotrophic and wet-autotrophic seasons.

Sign in / Sign up

Export Citation Format

Share Document