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Co-Authors
- K. K. Satpathy
- A. K. Mohanty
- G. Sahu
- M. V. R. Prasad
- U. Natesan
- M. Rajan
- Simi Mathew
- J. Vimala
- G. Latha
- M. Arul Muthiah
- S. Ramasundaram
- R. Sundar
- R. Lavanya
- M. A. Atmanand
- D. Sivaganesan
- A. Arul Lawrence Selvakumar
- P. Balakumar
- J. Chetan
- G. Abhishek
- D. Krishna Chaitanya
- K. V. Prasad
- S. Nikhil Bhat
- V. Vasugi
- V. Lakshmi Priyadarshini
- E. Vetriselvan
- N. S. Elangovan
- R. Viswanathan
- Usha Natesan
- Rokkam R. Rao
- M. Ravichandran
- Dibyadarshini Das
- K. Jossia Joseph
- C. Anoopa Prasad
- P. Murugesh
- Suchandra A. Bhowmick
- Neeraj Agarwal
- Rashmi Sharma
- K. N. Navaneeth
Journals
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Venkatesan, R.
- On the Occurrence of Trichodesmium Erythraeum (Ehr.) Bloom in the Coastal Waters of Kalpakkam, East Coast of India
Abstract Views :421 |
PDF Views:161
Authors
K. K. Satpathy
1,
A. K. Mohanty
2,
G. Sahu
3,
M. V. R. Prasad
1,
R. Venkatesan
4,
U. Natesan
5,
M. Rajan
1
Affiliations
1 Environmetal & Industrial Safety Section, Safety Group, Indira Gandhi Center for Atomic Research, Kalpakkam-603 102, Tamil Nadu, IN
2 Center for Environmental Studies, Anna University, Chennai- 600 025
3 National Institute of Ocean Technology, Chennai- 601 302
4 National Institute of Ocean Technology, Chennai- 601 302, IN
5 Center for Environmental Studies, Anna University, Chennai- 600 025, IN
1 Environmetal & Industrial Safety Section, Safety Group, Indira Gandhi Center for Atomic Research, Kalpakkam-603 102, Tamil Nadu, IN
2 Center for Environmental Studies, Anna University, Chennai- 600 025
3 National Institute of Ocean Technology, Chennai- 601 302
4 National Institute of Ocean Technology, Chennai- 601 302, IN
5 Center for Environmental Studies, Anna University, Chennai- 600 025, IN
Source
Indian Journal of Science and Technology, Vol 1, No 2 (2007), Pagination: 1-9Abstract
A prominent discolouration of the coastal waters by the blue-green alga Trichodesmium erythraeum was encountered in the east coast of Kalpakkam on 16th March 2007. The bloom persisted only for one day exhibiting visible alteration in physico-chemical properties and phytoplankton community structure of the coastal waters. The Trichodesmium cell density was 4.14 x 106 cells l-1, sharing 74.19 % of the total cell count (5.57 x 106 cells l-1). Only 24 species of phytoplankton were encountered on the day of bloom as compared to the highest number of 44 species in a single observation during pre- and post-bloom periods (1st March to 29th March). Concentration of chlorophyll-a and phaeopigments increased to about 20 times on the day of bloom compared to the pre-bloom values. An abrupt increase in ammonia, total nitrogen and phosphate was noticed on the day of bloom. The impact of this bloom on coastal water quality is reported.Keywords
Trichodesmium Erythraeum, Algae, Bloom, Marine Cyanobacterium, East Coast, IndiaFull Text
References
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- Comparison between LTTD and RO Process of Sea-Water Desalination: an Integrated Economic, Environmental and Ecological Framework
Abstract Views :267 |
PDF Views:94
Authors
Affiliations
1 National Council of Applied Economic Research (NCAER), Parisila Bhavan, 11, Indraprasta Estate, New Delhi 110 002, IN
1 National Council of Applied Economic Research (NCAER), Parisila Bhavan, 11, Indraprasta Estate, New Delhi 110 002, IN
Source
Current Science, Vol 106, No 3 (2014), Pagination: 378-386Abstract
Sea-water desalination has emerged as the key alternative to overcome demand-supply gap of potable water, worldwide. This paper aims to carry out a technology review of sea-water desalination, technologies in an integrated framework of economic, environmental and ecological analyses. The economic analysis here refers to a project/technology development effort analysis in the context of national economy. The cost per unit output from this perspective is the economic cost. In an environmental analysis, the higher specific energy consumption in a process vis-avis the best technology option in the project area is measured in terms of certified emission reduction. In ecosystem analysis, the accent is to find out whether the technology disrupts the existing eco-system. Such a disturbance entails a huge ecological cost. The cost quantified per unit output is arrived at as the reduction in GDP in the project affected area due to the direct and indirect effects of adverse ecological effects; these effects are deduced using specifically developed I-O tables 'with and without' technology options, for the project area. The choice of technology is the one with the minimum composite cost per unit output. The composite cost in the context is the sum of economic cost, the environmental cost and the ecological cost per unit output. The framework is applied in the technology review of low-temperature thermal desalination process and its impact on project areas of Lakshadweep islands and Thoothukodi district vis-a-vis the alternative RO process of sea-water desalination technology.Keywords
Economic, Environmental and Ecological Factors, Reverse Osmosis, Sea Water, Thermal Desalination.Full Text
- Signatures of very Severe Cyclonic Storm Phailin in Met-Ocean Parameters Observed by Moored Buoy Network in the Bay of Bengal
Abstract Views :293 |
PDF Views:127
Authors
R. Venkatesan
1,
Simi Mathew
1,
J. Vimala
1,
G. Latha
1,
M. Arul Muthiah
1,
S. Ramasundaram
1,
R. Sundar
1,
R. Lavanya
1,
M. A. Atmanand
1
Affiliations
1 National Institute of Ocean Technology, Velachery–Tambaram Main Road, Pallikaranai P.O., Chennai 600 100, IN
1 National Institute of Ocean Technology, Velachery–Tambaram Main Road, Pallikaranai P.O., Chennai 600 100, IN
Source
Current Science, Vol 107, No 4 (2014), Pagination: 589-595Abstract
The moored buoy network deployed in the Bay of Bengal played a critical role in the collection and transmission of surface meteorological and oceanographic conditions in real time through satellite telemetry, enabling constant monitoring of the cyclone Phailin. It is the first report of in situ timeseries measurement of a very low pressure taken during cyclones in the northern Indian Ocean. The BD10 buoy recorded a minimum atmospheric pressure of 920 hPa, which happened to be within the eye of the cyclone. This article presents an account of important changes that were observed in the surface meteorological and oceanographic parameters under the influence of the very severe cyclonic storm Phailin. An attempt has been made to understand the role of stratification in intensifying the cyclone Phailin in comparison with the cyclone Lehar which weakened in the ocean itself, based on subsurface data from the moored buoys which were on the track of the respective cyclones. Both the cyclones traversed across the Bay of Bengal in a similar way and the buoys were very close to the cyclone track withstood the rough sea conditions during the storms with their specially designed body. The BD09 buoy which happened to be on the right side of the track of cyclone Phailin moved in a circular path as a result of the inertial oscillation forced by the strong cyclonic winds.Keywords
Cyclonic Storm, Met-Ocean Parameters, Moored Buoy, Real-Time Observations.Full Text
- Performance Analysis of IEEE 802.11 for Collision Detection and Collision Avoidance in Mobile Ad Hoc Network
Abstract Views :148 |
PDF Views:1
Authors
Affiliations
1 Dept. of Computer Science & Engineering, Karpagam College of Engineering, Coimbatore, IN
2 Dept of Information Technology, PSG College of Technology, Coimbatore, IN
1 Dept. of Computer Science & Engineering, Karpagam College of Engineering, Coimbatore, IN
2 Dept of Information Technology, PSG College of Technology, Coimbatore, IN
Source
Wireless Communication, Vol 1, No 2 (2009), Pagination: 103-107Abstract
Packet collisions at the Medium Access Control (MAC) layer in distributed wireless networks use a combination of carrier sensing and collision avoidance. When the collision avoidance strategy fails, such schemes cannot detect collisions and corrupted data frames are still transmitted in their entirety, thereby wasting the channel bandwidth and significantly reducing the network throughput. To address this problem, this paper analyse the wireless MAC protocol CSMA, MACA and IEEE802.11 capable of collision detection and collision avoidance. The performance of the IEEE802.11 protocol has been investigated using extensive analysis and simulations. Our results show that, the protocol IEEE802.11 has significant performance gains in terms of node throughput and reduce the network collisions.
Keywords
MAC, Wireless, Collision Detection, Collision Avoidance, CSMA, CSMA/CD, MACA.
- An Analysis of Topological Control Protocols & its Issues in Wireless Sensor Network
Abstract Views :182 |
PDF Views:2
Authors
Affiliations
1 CMJ University, Shillong, IN
1 CMJ University, Shillong, IN
Source
Networking and Communication Engineering, Vol 4, No 13 (2012), Pagination: 780-786Abstract
Wireless sensor network (WSN) are increasingly considered by the scientific community as the future of environmental monitoring. The characteristics of Topology control in WSN/Wireless ad-hoc network concerns like coverage, spot – sensing, energy consumption, active/sleep node, data transmission and life time of a node (e.g., small battery, limited computation capabilities, inexpensive transceiver etc.). The topology of a multi-hop wireless ad hoc network can be viewed as a graph with an edge connecting any pair of Nodes. One of the key approaches for prolonging the sensor network operable lifetime is to deploy an effective topology control protocol. The aim of this survey paper is to analyze the topology control protocols which are being used to construct or to maintain a Centralized/Distributed wireless sensor network. In this paper, we are going to discuss about the objectives, characteristics and classification of routing protocols and the classification of topology control protocols (Centralized controlling and Distributed monitoring method) and also the challenges in topology control.Keywords
Topology Control, Protocols, Algorithms, Wireless Sensor Network, Wireless Ad-Hoc Network.- Combining Biometric Features of Iris and Retina for Better Security Cryptography
Abstract Views :151 |
PDF Views:1
Authors
Affiliations
1 Department of Computer Science and Engineering,, Selvam College of Technology, Namakkal, Tamilnadu, IN
2 Department of Information and Technology, PSG College of Technology, Coimbatore, Tamilnadu, IN
1 Department of Computer Science and Engineering,, Selvam College of Technology, Namakkal, Tamilnadu, IN
2 Department of Information and Technology, PSG College of Technology, Coimbatore, Tamilnadu, IN
Source
Digital Image Processing, Vol 3, No 16 (2011), Pagination: 1083-1089Abstract
The requirement for dependable user authentication methods has increased in the wake of discriminating worries about security and fast developments in networking, communication and mobility. The majority of authentication systems of present control access to computer systems or secured locations with the help of passwords, but it are not highly durable to attacks because it can be easily broken or stolen. Thus, biometrics has now turned out to be a feasible replacement to conventional identification techniques in several application fields. Biometrics which is indicated as the science of recognizing an individual according to their physiological or behavioral traits is evolving to gain recognition as a legitimate technique for identifying an individual‟s identity. Biometric technique have proved importance in a range of security, access control and monitoring applications. The technologies are still new and rapidly evolving; this also leads to the cracking of even the biometrics system. Therefore, a new technique must be developed to overcome those difficulties. A new technique called multimodal biometrics can be used to satisfy those requirements because it is very difficulty for the attackers to identify more than one biometrics. In this technique, the features are extracted from different biometrics and then they are combined using a technique called Fusion. From this fused features, cryptographic key id generated which is used as a key for authenticating the system. This paper combines the features of Iris and Retina. The experimental result suggests that the combination of Iris and Retina results in better security than the other combination of biometrics.Keywords
Biometrics, Cryptography Key Generation, Minutiae Points Extraction, Security Analysis.- Factors Influencing Delay in Construction Projects
Abstract Views :218 |
PDF Views:0
Authors
Affiliations
1 National Institute of Construction Management and Research-NICMAR, Advanced Construction Management, Hyderabad, IN
1 National Institute of Construction Management and Research-NICMAR, Advanced Construction Management, Hyderabad, IN
Source
International Journal of Technology, Vol 5, No 2 (2015), Pagination: 225-228Abstract
A construction project is successful only if the target(s) is/are achieved as per schedule and following the baseline to the core. Any variations from these cause a delay and by which the project cannot be completed within a planned time. Also the delay results in expense to all the parties involved in the completion of a particular project. This often end up in clashes between parties, arbitration/ litigation and in certain cases can lead to the total abandonment of project. There are several factors attributed to the delay. These scenarios grab more attention in many construction projects. This is a common issue faced all over the world and India is no exception. This paper tries to identify the various factors attributing to delay of construction projects and their effects in Indian construction Industry. The research methodology includes literature review and questionnaire survey to identify and collect data. The data are analysed using SPSS software to know the factors which are majorly effects for delay. A questionnaire and personal interviews have formed the basis of this research. Factor analysis and regression modelling were used to examine the significance of the delay factors. The construction delays were grouped under seven major factors and each of these major factors are explored with sub factors under them. Factor analysis will be carried out to identify the influence of the delay factors. These findings will be used to overcome the delays in Indian construction industry in controlling the time overrun and cost overrun in construction projects.Keywords
Construction Delay, Delay Factors, Construction Industry.- Delays in Construction Projects-A perspective on Cash flow and Working Capital Management
Abstract Views :202 |
PDF Views:0
Authors
Affiliations
1 SMBS, VIT University, Chennai, IN
2 Gammon India Limited, Mumbai, IN
3 NICMAR, Hyderabad, IN
1 SMBS, VIT University, Chennai, IN
2 Gammon India Limited, Mumbai, IN
3 NICMAR, Hyderabad, IN
Source
International Journal of Technology, Vol 5, No 2 (2015), Pagination: 269-273Abstract
India is a country with enormous requirements of infrastructure development and up-gradation. The development of the country depends on building sustainable infrastructure with a challenge of getting it done real fast to catch up with the huge and rising demand. The role of the construction industry in the economic growth of a country is enormous and immeasurable. The challenge of providing needed quality infrastructure is in the hands of construction Industry. However in our country, almost all construction projects, suffer major delays and cost overruns. In some cases get terminated midcourse and do not get completed at all. Out of the total 766 central projects of value Rs 150 crore and more, 237 projects are delayed (~30.94%), while the cost of these projects have gone up from 10,68,206.97 crore to 12,73,650.02 crore (~19.20%)1.
The reasons for the delays and cost overruns on these projects are plenty. Delay in land acquisition, right of access, delayed financial clearances, delayed / in adequate designs, scope creep, incorrect estimates, etc. to name a few.
In a well-planned project, meticulous and thought of cash flow management and smooth project execution, has to go on hand in hand. Delays in construction projects as above can jeopardize the cash flow plan and disturb the working capital cycle ultimately turn a healthy, cash positive project into a cash negative sick project. This paper illustrates the impact of delays on net cash flow of projects also explains the importance of cash flow monitoring indicators, various cash flow mitigation strategies to overcome these problems.
Keywords
Construction, Project Delays, Cash Flow, Working Capital, Prediction, Mitigation.- Experimental Investigation on Ceracerte
Abstract Views :208 |
PDF Views:0
Authors
Affiliations
1 B.E. Civil Engineering, Chennai, IN
2 EPMCR-Engineering Project Management Consultancy and Research, Chennai, IN
3 NICMAR-National Institute of Construction Management and Research, NAC Campus, Hyderabad, IN
4 Department of Civil Engineering, Jerusalem College of Engineering, Chennai, IN
1 B.E. Civil Engineering, Chennai, IN
2 EPMCR-Engineering Project Management Consultancy and Research, Chennai, IN
3 NICMAR-National Institute of Construction Management and Research, NAC Campus, Hyderabad, IN
4 Department of Civil Engineering, Jerusalem College of Engineering, Chennai, IN
Source
International Journal of Technology, Vol 5, No 2 (2015), Pagination: 118-124Abstract
The high consumption of raw materials by the construction sector results in chronic shortage of building materials and the associated environmental damage. In the last decade, the construction companies have conducted various researches on the utilization of waste products in concrete in order to reduce the utilization of natural resources.
Use of construction wastes in concrete-making, will lead to greener environment. In this study, an attempt has been made to find the suitability of the ceramic wastes as a possible substitute for conventional natural fine aggregate in concrete. Experiments were carried out to determine the compressive and split tensile strength of concrete by partially replacing ceramic wastes in place of river sand and to compare them with that of conventional concrete made with natural fine aggregate.
The test results indicated that the workability of ceramic waste fine aggregate concrete is high and equivalent to that for conventional concrete. The compressive strength of ceracrete is slightly higher and the split tensile strength of ceracrete is almost equivalent to that of controlled concrete.
Keywords
Ceracrete, Workability, Compressive Strength, Tensile Strength.- Study on Economics Between Twist Arc Narrow Gap and Tandem Submerged Arc Welding Processes
Abstract Views :210 |
PDF Views:4
Authors
Affiliations
1 Bharath Heavy Electricals Ltd., Tiruchirappalli, IN
1 Bharath Heavy Electricals Ltd., Tiruchirappalli, IN
Source
Indian Welding Journal, Vol 13, No 2 (1981), Pagination: 48-52Abstract
The Japanese have recently introduced the Twist Arc Narrow Gap Welding Process for welding of thick plates, while the West continues their research and application on Tandem Submerged Arc Welding and Multi wire Submerged Arc Process.- Analytical Estimation of Welding Time BHEL (Tiruchi)'s Experience
Abstract Views :238 |
PDF Views:4
Authors
Affiliations
1 Heavy Electricals Ltd., Tiruchy, IN
1 Heavy Electricals Ltd., Tiruchy, IN
Source
Indian Welding Journal, Vol 12, No 2 (1980), Pagination: 53-62Abstract
1.1 Welding is the single major manufacturing operation at the High Pressure Boiler Plant Unit of Bharat Heavy Electricals Limited (Tiruchy Unit). Presently, 1,00,000 tonnes of components per year-(pressure parts and non-pressure parts for boilers and boiler house auxiliaries)- are being fabricated both at BHEL Works and sub-contractors' works. BHEL alone employs about 750 welders of whom nearly 200 are high pressure welders.
1.2 Planning and co-ordinating these welders' activities and associated welding equipment is a vital function and depends on the time estimation for carrying out various welding operations.
- Welding Productivity and Economy
Abstract Views :247 |
PDF Views:4
Authors
Affiliations
1 Bharat Heavy Electricals Ltd., Tiruchirapalii, IN
1 Bharat Heavy Electricals Ltd., Tiruchirapalii, IN
Source
Indian Welding Journal, Vol 9, No 3 (1977), Pagination: 81-87Abstract
The weldwg group of the National Committee on Science and Technology (NCST) reports that in India, presently 95% of the total weld metal deposited is by Manual Metal Arc Welding (MMAW) using coated stick electrodes and forecasts that even after 10 years from now, this will remain at 90%.
In this context, this paper briefly explains some of the factors that will contribute for improving productivity and bringdown the cost of welding by MMAW process.
- Observed Warming of Sea Surface Temperature in Response to Tropical Cyclone Thane in the Bay of Bengal
Abstract Views :322 |
PDF Views:97
Authors
Affiliations
1 National Institute of Ocean Technology, Pallikaranai P.O., Chennai 600 100, IN
2 Anna University, Guindy Campus, Chennai 600 025, IN
3 International CLIVAR Monsoon Project Office, Indian Institute of Tropical Meteorology, Pashan Road, Pune 411 008, IN
4 National Centre for Antarctic and Ocean Research, Headland Sada, Vasco-da-Gamma, Goa 403 804, IN
1 National Institute of Ocean Technology, Pallikaranai P.O., Chennai 600 100, IN
2 Anna University, Guindy Campus, Chennai 600 025, IN
3 International CLIVAR Monsoon Project Office, Indian Institute of Tropical Meteorology, Pashan Road, Pune 411 008, IN
4 National Centre for Antarctic and Ocean Research, Headland Sada, Vasco-da-Gamma, Goa 403 804, IN
Source
Current Science, Vol 114, No 07 (2018), Pagination: 1407-1413Abstract
An unusual near-surface warming was seen in observations from a moored buoy BD11 at 14°N/83°E, and a nearby Argo profiling float in the Bay of Bengal, during the passage of tropical cyclone Thane, during 25–31 December 2011. The cyclone induced a warming of sea surface temperature (SST) by 0.6°C to the right of the track. Heat budget analysis based on moored observations and satellite data rules out the role of horizontal advection and net heat flux in warming the surface layer. We find that vertical mixing/entrainment in response to the cyclone, in conjunction with a pre-storm temperature inversion (subsurface ocean warmer than SST) led to the observed warming. Pre-storm and post-storm salinity and temperature profiles from an Argo float close to the mooring BD11 have higher vertical resolution than the moored data; they suggest vertical mixing of the upper 70 m of the water column. The moored observations show that the thermal inversion, erased by storm-induced mixing, reappears in a few days.Keywords
Bay of Bengal, Cyclone, OMNI Buoy, SST.Full Text
References
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- Dynamic Sitting Exercise versus Spinal Extension Exercise on Pain, Lumbar Mobility and Quality of Life in Adults with Mechanical Low Back Pain
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Authors
Affiliations
1 MPT in Department of Musculoskeletal and Sports, IN
2 The Oxford College of Physiotherapy, Begur Road, Hongasandra, Bangalore, IN
1 MPT in Department of Musculoskeletal and Sports, IN
2 The Oxford College of Physiotherapy, Begur Road, Hongasandra, Bangalore, IN
Source
Indian Journal of Physiotherapy & Occupational Therapy-An International Journal, Vol 14, No 1 (2020), Pagination: 83-87Abstract
Background: Now-a-days it is seen that busy work schedule and unhealthy environment leads to discontinuity in exercising despite of awareness and knowledge of its effectiveness on problems like low back pain. There are many factors including improper posture, over loading, immobility, trunk muscles weakness leads to mechanical low back pain in adults. Exercises of various types have been used in managing low back pain. Hence there is a need to find out a single functional and effective exercise for such problems so that they can be done anytime during work and without any equipment which is also economical.
Methodology: Thirty adults aged between 20-30 years participated in this comparative experimental study. After underwent physical screening for selection criteria mechanical low back pain followed by simple randomization participants were divided into group A and group B. Group A and group B received dynamic sitting and spinal extension exercise respectively for thrice a week for six weeks. Pre and post values were assessed using outcome measures Visual Analog Scale for pain, MMST used for lumbar mobility and Short Form-36 Health Survey Questionnaire for quality of life.
Results: In comparison of post test scores of outcome measures evidenced that the reduction of pain score, improvement in lumbar mobility and quality of life scores. There were significantly improvement among the adults with mechanical low back pain treated with Dynamic sitting exercise (DSE) than treated with Spinal extension exercise (SEE).
Conclusion: 6 weeks of dynamic sitting and spinal extension exercise can prevent in pain and improvement in lumbar mobility and quality of life in adults with mechanical low back pain.
Keywords
Mechanical Low Back Pain, Dynamic Sitting Exercise, Spinal Extension Exercise, Lumbar Mobility, Quality of Life.References
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- Differential Upper Ocean Response Depicted in Moored Buoy Observations during the Pre-Monsoon Cyclone Viyaru
Abstract Views :232 |
PDF Views:81
Authors
R. Venkatesan
1,
K. Jossia Joseph
1,
C. Anoopa Prasad
1,
M. Arul Muthiah
1,
S. Ramasundaram
1,
P. Murugesh
1
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1760-1767Abstract
The pre-monsoon cyclone Viyaru in the Bay of Bengal during May 2013 traversed a long track from 5°N to 22°N over 7 days with basin-wide response, which was well captured by the time series observations of OMNI buoy network along with satellite data. The differential upper ocean characteristics and its variable response reveal that vertical mixing override horizontal advection during cyclone passage. This study provides insight into the variability in wave spectra, differential response on either side of the track and presence of cold core eddy combined with a thick barrier layer in modulating the upper ocean response.Keywords
Bay Of Bengal, Barrier Layer, Cyclone Viyaru, Eddies, OMNI Buoys, Wave Spectra.Full Text
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- Cyclone Amphan: Oceanic Conditions Pre- and Post-Cyclone using in situ and Satellite Observations
Abstract Views :182 |
PDF Views:107
Authors
Suchandra A. Bhowmick
1,
Neeraj Agarwal
1,
Rashmi Sharma
1,
R. Sundar
2,
R. Venkatesan
2,
C. Anoopa Prasad
1,
K. N. Navaneeth
1
Affiliations
1 Space Applications Centre, Indian Space Research Organization, Ahmedabad 380 015, IN
2 National Institute of Ocean Technology, MOES, Chennai 600 100, IN
1 Space Applications Centre, Indian Space Research Organization, Ahmedabad 380 015, IN
2 National Institute of Ocean Technology, MOES, Chennai 600 100, IN
Source
Current Science, Vol 119, No 9 (2020), Pagination: 1510-1516Abstract
Amphan, a category-5 tropical cyclone, originated over Bay of Bengal (BoB) and had a landfall in West Bengal, India on 20 May, causing havoc in the region. In this study, in-situ buoy and various satellite measurements are used to analyse the ocean condition before and after the storm, primarily from the air–sea interaction perspective. Widespread anomalous warming was observed in BoB before the event, due to high net surface insolation received by the ocean. The warm SST anomalies in the central BoB were coincident with anti-cyclonic warm core eddies, implying availability of higher oceanic heat content. Observations from BD13 buoy, close to the cyclone track showed heating of the overlying atmosphere due to this ocean warming. Strong surface cooling was observed after passage of the cyclone due to wind induced upper-ocean mixing that is stimulated by low stratification in BoB.Keywords
Air–Sea Interaction, Oceanic Conditions, Satellite and In situ Observations, Tropical Cyclones.Full Text