Meteorological aspects of mud bank formation along south west coast of India

Philip, Asha S.; Babu, C. A.; Hareeshkumar, P

doi:10.1016/j.csr.2013.05.016

Cited by 13 publications

(5 citation statements)

References 24 publications

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“…However, we speculate that the occurrence of fluid mud is most likely influenced by physical marine processes such as interplay of currents and waves (Tatavarti and Narayana, 2006), wind induced upwelling (Philip et al, 2013) etc. as seen in the recent studies.…”

Section: Resultsmentioning

confidence: 99%

“…Ramasastry and Myrland (1959) stated that the fluid mud is associated with upwelling and divergence of nutrient rich bottom waters lifting the fine mud due to vertical acceleration. In a recent study, Philip et al (2013) opined that monsoon organized convection in the equatorial region give rise to increased wind stress along shore causing upwelling and subsequently forming the fluid mud.…”

Section: Littoral and Rip Currentsmentioning

confidence: 98%

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Environmental isotopes to test hypotheses for fluid mud (mud bank) generation mechanisms along the southwest coast of India

Jacob

Ansari

Revichandran

2015

Estuarine, Coastal and Shelf Science

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Section: Resultsmentioning

confidence: 99%

Section: Littoral and Rip Currentsmentioning

confidence: 98%

Environmental isotopes to test hypotheses for fluid mud (mud bank) generation mechanisms along the southwest coast of India

Jacob

Ansari

Revichandran

2015

Estuarine, Coastal and Shelf Science

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“…At this time, the low-level wind along the southwest coast of India is parallel to the coast, towards the south and upwelling occurs near the coast. Because of this, an increase in chlorophyll concentration and total chlorophyll is observed near the south-west coast of India [33].…”

Section: Factors Affecting Mudbank Formationmentioning

confidence: 96%

Characteristics of Mudbanks along the Southwest Coast of India

2021

EESRR

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Mudbank is a unique phenomenon observed along the south-west coast of India among all the Indian coastal regions during the Southwest Monsoon Season. The scientific reasons behind the formation and its persistence are vague. Mudbank is considered as a boon to the fishermen of Kerala, as they are getting reasonable catches during the occurrence of mudbanks using indigenous boats from the calm sea, which otherwise is in a fury during the rough Southwest Monsoon Season. Since the region, the Arabian Sea, is significant as a carbon sink due to its very high productivity because of different coastal ocean features, variations in the smaller and highly restricted coastal processes due to climate change can have a significant impact on the rates of global warming. Here, we consolidate the previous publications on various aspects of mudbanks with the reports of the occurrence of mudbanks on the south-west coast of India. A model for the prediction of the formation and location of mudbanks, inclusive of all the intrinsic and extrinsic parameters involved, through an extensive study is much relevant as far as the socio-economic and food security significance is concerned. Here, we discuss the most conducive factors for the formation of mudbank and its characteristics with special reference to Alappuzha, where the frequency of occurrence of mudbanks is maximum among the Indian coastal regions.

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“…Despite the fact that the maximum MAH of wind waves and swells in the monsoon cycle during 1979-2018 have been observed in June, it is clearly seen that there are deviations from this average cycle, when the largest waves are observed in other months (Figure 4). In Figure 9, changes in the monthly averaged SWH during summer monsoon years in which observations of times of appearance and times of existence of MBs in the Kerala region are available are presented in Philip et al (2013).…”

Section: Possible Connections Of Arabian Sea Wave Climate Fluctuations and Occurrence Of Mudbanksmentioning

confidence: 99%

“…Samiksha et al (2017) studied the wave attenuation due to the MBs using measurements and modeling and found that 65-70% of waves dampened in the MBs area. Philip et al (2013) found that the formation is associated with increased upwelling along the coast. Jacob et al (2015) and Loveson et al (2016) argued over the validity of subterranean conduit flow of mud/water from the Vembanad Lagoon.…”

Section: Introductionmentioning

confidence: 99%

Wave Climate Variability and Occurrence of Mudbanks Along the Southwest Coast of India

2021

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Mudbanks (MBs) are a natural phenomenon, forming along the southwest coast of India during southwest monsoon (SWM), almost every year. High waves initiate these formations. The temporal variability (both intra-annual and multi-decadal) of wave climate of the southeastern Arabian Sea (AS) is related to main climate indices which determine climate fluctuations in this region, and based on that, occurrence of MBs is illustrated. Voluntary Observing Ships data and climate indices such as El Niño phenomenon index for the site 5N-5S and 170W-120W (NINO3.4), El Niño/Southern Oscillation (ENSO), Southern Oscillation Index (SOI), Pacific Decadal Oscillation (PDO), AAO, Atlantic Multi-decadal Oscillation (AMO), and IO Dipole (IOD) have been analyzed. Using wavelet correlation method, high correlations with positive and negative phase of climatic indices (IOD, SOI, NINO3.4, ENSO, AMO, PDO, and AAO) fluctuations in heights of wind waves and swell and time lags between them on monthly, yearly, decadal, and multi-decadal time scales are identified. For the first time, high correlation between the annual fluctuations of AMO and monthly average wave heights is shown. It has been found that the El Niño phenomenon plays a major role in the variability of wave climate of the southeastern AS for all time scales. A strong variability in wave climate at short time scales, such as 0.5, 1, 3.0–3.5, 4–5, and 7–8 years, is evident from the analyses. Decadal changes correspond to 10, 12–13, and 16 years. The influence of El Niño is manifested with a delay of several months (3–6) on annual time scales and about 1–2 years on a decadal and multi-decadal time scales. Possible connection between the occurrence of MBs and variability in wave climate in the southeastern AS is shown for the periods 7, 10–12, 18–20, and about 40 years correlating with fluctuation in the climate indices—IOD, ENSO, NINO3.4, and SOI. It is shown that intra-annual fluctuations in occurrence and duration of existence of MBs depend on the distribution of highest monthly averaged significant wave heights (SWHs) in the summer monsoon cycle.

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Meteorological aspects of mud bank formation along south west coast of India

Cited by 13 publications

References 24 publications

Environmental isotopes to test hypotheses for fluid mud (mud bank) generation mechanisms along the southwest coast of India

Environmental isotopes to test hypotheses for fluid mud (mud bank) generation mechanisms along the southwest coast of India

Characteristics of Mudbanks along the Southwest Coast of India

Wave Climate Variability and Occurrence of Mudbanks Along the Southwest Coast of India

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