Seasonal variation in water column conditions in the upper Gulf of Thailand

Buranapratheprat, Anukul; Yanagi, Tetsuo; Matsumura, Satsuki

doi:10.1016/j.csr.2008.07.006

Cited by 29 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4,10). Low river discharge during intense surface heating in NOM (Yanagi et al 2001;Buranapratheprat et al 2008a) of EN can lead to thermal stratification. The strengthening of wind; thus, potentially generated stronger vertical mixing to break down the stratifications and facilitate chl-a enhancement at the sea surface as shown in the chl-a enhancement in the offshore area during the events.…”

Section: Nonmonsoon Season (Nom)mentioning

confidence: 99%

Seasonal and interannual variations of MODIS Aqua chlorophyll-a (2003–2017) in the Upper Gulf of Thailand influenced by Asian monsoons

et al. 2021

Self Cite

View full text Add to dashboard Cite

Seasonal and interannual variations of chlorophyll-a (chl-a) in the upper Gulf of Thailand (uGoT) were obtained using new regionally tuned algorithms applied to Moderate Resolution Imaging Spectroradiometer-Aqua. This long time-series (2003–2017) data were analyzed in the context of variations in environmental conditions associated with the Southeast Asian Monsoon. Chl-a distribution patterns were distinct for the non-monsoon (NOM), southwest-monsoon (SWM), and northeast-monsoon (NEM) seasons. During the SWM/NEM, high/low chl-a concentrations were associated with high/low precipitation and river discharge. During the NOM chl-a concentrations were generally low, because of low precipitation. In general, chl-a variability was tightly coupled to discharge from the Chao Phraya and Tha Chin rivers. Chl-a concentrations were generally higher in the north, but chl-a accumulation in the east/west of the uGoT could be linked to piling of freshwater to the east/west during the SWM/NEM caused by changes in wind direction and the reversal of currents. Interannual changes in chl-a were attributed to El Niño-Southern Oscillation (ENSO) rather than Indian Ocean Dipole (IOD) driven changes in precipitation, river discharge, and wind patterns. During the SWM, positive/negative chl-a anomalies coincided with high/low precipitation and river discharge during La Niña/El Niño. During the NEM, positive/negative chl-a anomaly coincided with high/low river discharge and strong/weak wind during La Niña/El Niño. Meanwhile, during NOM, positive chl-a anomaly could be attributed to anomalous high wind speed and precipitation during El Niño.

show abstract

Section: Nonmonsoon Season (Nom)mentioning

confidence: 99%

Seasonal and interannual variations of MODIS Aqua chlorophyll-a (2003–2017) in the Upper Gulf of Thailand influenced by Asian monsoons

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…This value recommended based on geographical setting and boundary condition in domain area. As the study focusing on hydrodynamic on island circulation therefore, surface heat fluxes able to ignore as this factor largely influence on mixing and stratification of water column and also regional scale of study area [19] [20].…”

Section: Field Measurement and Datasets For Model Calibration And Valmentioning

confidence: 99%

Hydrodynamic Modelling of Bidong Island Vicinity Waters

Daud¹,

Akhir²

2015

OJMS

View full text Add to dashboard Cite

This paper explores the dynamic of meteorological forcing on current circulation pattern in the vicinity of Bidong using an unstructured flexible mesh hydrodynamic model. The forcings were wind, tides, temperature and salinity. The seasonal wind monsoon, mixed tides with dominant diurnal and tropical monsoon climate is characteristics of Bidong Island. We find that this area has different current circulation patterns in response to monsoon changes. It also experienced a small scale of island wake during NE monsoon. This island wake was generated by a strong northeasterly wind. We performed a series of numerical simulations based on three dominant factors in circulation, and evaluated the model using wind, tides and density. We investigated the wind-driven circulation and residual current. This study contributes to the debates on hydrodynamic of current circulation in vicinity of Bidong Island. Specifically, this study was conducted to understand the changes of currents by seasonal wind (NE monsoon and SW monsoon), temperature and salinity.

show abstract

“…Previous observational and numerical studies show that circulation in the Gulf of Thailand varies seasonally (e.g., Yanagi et al, 2001;Buranatheprat et al, 2008;Saramul, 2017;Buranatheprat et al, 2002;Aschariyaphotha et al, 2008;Saramul and Ezer, 2014). A series of 6 hydrographic cruises over October 2003 -July 2005 in the upper GoT (uGoT; north of 12.5°N) suggest the overall cyclonic circulation during the northeast monsoon (November -February; Buranatheprat et al, 2008) in agreement with numerical studies that accounts for tidal forcing, bottom friction, and river runoffs (Buranatheprat et al, 2002;Saramul and Ezer, 2014). Still, both numerical simulations are forced by spatially uniform reanalysis wind products, which is likely not representing the actual GoT wind field (Yanagi and Takao, 1998).…”

Section: Introductionmentioning

confidence: 98%

“…The extreme seasonal wind and precipitation conditions influence the circulation pattern, physical seawater properties (e.g. salinity, density, hence the thermohaline circulation; Yanagi and Takao, 1998;Yanagi et al, 2001;Buranatheprat et al, 2002Buranatheprat et al, , 2008, and nutrients loadings (e.g. nitrate, phosphate, and ammonia) from rivers (Suvapepun, 1991;Sriwoon et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Surface circulation in the Gulf of Thailand from remotely sensed observations: seasonal and interannual timescales

Anutaliya

2022

Preprint

View full text Add to dashboard Cite

Abstract. The Gulf of Thailand (GoT), a shallow basin located in the western equatorial Pacific, undergoes highly-variable wind influences on both seasonal and interannual timescales. On seasonal timescale, the Asian monsoon prevails, dominating the circulation pattern. The most dominant complex empirical orthogonal function of the Gulf of Thailand (GoT) current explains 28 % of the total variance with the phase relationship following the monsoon seasons. High current variability is observed over the upper GoT (uGoT), along the western boundary which is highly correlated with that at the southeastern entrance, and in the GoT interior. Satellite altimetry suggests that approximately 50 % of the surface current variability is geostrophic set up by wind stress curl, particularly at basin-scale. Also, the study hints at the importance, to sea surface height near the coastline, of coastal trapped Kelvin waves forced by wind stress curl. Wind-driven current accounts for a significant fraction of the ageostrophic flow along the western boundary and the GoT interior; however, its effect is unclear over the uGoT. At interannual timescale, the GoT circulation is directly impacted by both El Niño Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD). Interestingly, the climate modes affect the circulation over each region of the GoT differently. The IOD highly correlates with interannual variability of current along the GoT western boundary and the southern boundary of the observing domain (8° N), while the ENSO correlates with that in the interior. Over the uGoT, both climate modes explain similar percentage of the interannual current variability.

show abstract

Seasonal variation in water column conditions in the upper Gulf of Thailand

Cited by 29 publications

References 11 publications

Seasonal and interannual variations of MODIS Aqua chlorophyll-a (2003–2017) in the Upper Gulf of Thailand influenced by Asian monsoons

Seasonal and interannual variations of MODIS Aqua chlorophyll-a (2003–2017) in the Upper Gulf of Thailand influenced by Asian monsoons

Hydrodynamic Modelling of Bidong Island Vicinity Waters

Surface circulation in the Gulf of Thailand from remotely sensed observations: seasonal and interannual timescales

Contact Info

Product

Resources

About