Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

WAM Validation Studies in the North Indian Ocean using NCMRWF Analyzed Wind Fields


Affiliations
1 Naval Physical and Oceanographic Laboratory (NPOL), Thrikkakara, Cochin-682 021, India
2 DHI-NTU Research Centre, DHI Water and Environment, 200, Pandan Loop, Pantech-21, Singapore-128388, Singapore
3 Centre for Advanced Training in Earth System Sciences and Climate (CAT-ESSC), Indian Institute of Tropical Meteorology, Pune-411008, India
4 Department of Marine Science, Berhampur University, Berhampur-7, India
5 Department of Physical Oceanography, Cochin University of Science & Technology (CUSAT), Kochi-682 016, India
     

   Subscribe/Renew Journal


With the launch of Oceansat-I (IRS-P4), it became a reality to carry out validations of third generation wave model 3g-WAM in the North Indian Ocean region using the IRS-P4 analyzed wind fields provided by the National Centre for Medium Range Weather Forecasting (NCMRWF), New Delhi, India. However, the model predicted wave fields were to be still analyzed and further validated using all available field measurements which was the primary task before the scientific community. This study, describes the wave model validation studies carried out at Naval Physical and Oceanographic Laboratory (NPOL), Cochin, India through a collaborative research programme between NPOL and Space Application Centre (SAC), as part of the IRS-P4, MSMR Utilization Programme. Under this collaborative programme, 3g-WAM wave hindcasts were carried out for the Indian Ocean from 30°E to 120°E and 30°S to 30°N using the analyzed winds of NCMRWF and appropriate open sea boundary inputs. WAM was executed using six hourly input fields over 1.5°x1.5° grid resolution. The outputs of the model such as wave height, peak wave period, mean wave period and mean wave directions were compared with the time-series buoy measurements of National Institute of Ocean Technology (NIOT), Chennai, India and other available measurements. Comparisons between the predicted and observed wave parameters were very encouraging. However, the model predictions of significant wave height were overestimated during the extreme wind and wave conditions. By and large, the WAM predictions were quite reliable for the south-west monsoon (May-September) periods in spite of the limitations. These validation studies have revealed that, the performance of WAM was satisfactory and the hindcast wave fields of WAM for the North Indian Ocean can be utilized for various user applications in the deep waters over 30 meters.

Keywords

OCEANSAT I, WAM, IRS-P4 Analyzed Winds, Wave Model Validation.
Subscription Login to verify subscription
User
Notifications
Font Size


  • Goswami, B. N., and Rajagopal, E. N., 2003, “Indian Ocean surface winds from NCMRWF analysis as compared to QuikSCAT and moored buoy winds,” In Proc. of Indian Academy of Sciences (Earth Planetary Sciences), 112, pp. 61-77.
  • Panigrahi, J. K., Tripathy, J. K., and Umesh, P. A., 2008, “Optimum tracking of ship routes in 3g-WAM simulated rough weather using IRSP4 (MSMR) analysed wind fields,” J. Indian Soc. Rem. Sen., 36, pp. 149-158.
  • Panigrahi, J. K., and Umesh, P. A., 2008, “Minimal Time Ship Routing Using IRS-P4 (MSMR) Analyzed Wind Fields,” Marine Geodesy, 31, pp. 39-48.
  • Panigrahi, J. K., Misra, S. K., and Umesh, P. A., 2010, “Application of OCEANSAT-I, MSMR Analysed winds to Marine Navigation,” Int. J. Rem. Sen., 31, pp. 2623-2637.
  • Panigrahi, J. K., and Swain, J., 2010, “Numerical simulation and validation of deepwater spectral wind-waves,” Mar. Geo., 33, pp. 39-52.
  • Panigrahi, J. K., et al., 2012, “Optimal ship tracking on a navigation route between two ports: A hydrodynamics approach,” J. Mar. Sci. Tech., 17, pp.59-67.
  • Swain, J., Umesh, P. A., and Harikrishnan, M., 2010, “Role of Oceanography in Naval Defense,” Ind. J. of Geo-Mar. Sci., 39, pp. 631-645.
  • Hasselmann, S., et al., 1988, “The WAM-Development and Implementation Group (WAMDI). The WAM Model - A third generation ocean wave prediction model,” J. Phy. Oceanogr., 18, pp. 1775-1810.
  • Panigrahi, J. K., 2007, “Wind induced surface gravity waves in the North Indian Ocean and their potential applications,” Ph.D. Thesis, Berhampur University, Berhampur, India.
  • Vihang, Bhatt., et. al., 2004, “Impact of Oceansat-I MSMR data on analyzed oceanic winds and wave predictions,” Ocean Eng., 31, pp. 2283–2294.
  • Raj, Kumar., et al., 2009, “Improvement in predictability of waves over the Indian Ocean,” Nat. Haz., 49, pp. 275-291.
  • Prasad, Kumar, B., et al., 2004, “Sea State Hindcast with ECMWF Data Using a Spectral Wave Model for Typical Monsoon Months,” Nat. Haz., 31, pp. 537–548.
  • Komen, G. J., et al., 1994, Dynamics and Modelling of Ocean Waves, Cambridge, UK: Cambridge University Press.
  • The Wise Group – Cavaleri, L. et. al., 2007, “Wave modelling – the state of the art,” Prog. Oceanogr., 75, pp. 603-674.
  • Swain, J., et. al., 2003b, “Wave hindcast for the Indian Ocean region covering the period of ARMEX-I (June-August 2002),” ARMEXWorkshop on data analysis and initial scientific results, NIOT, Chennai, INDIA.
  • Hastenrath, S., and Lamb, P. J., 1979, Climatic atlas of the Indian Ocean, Part-I, Surface Climate and atmospheric circulation, The University of Wisconsin Press, USA.
  • Young, I. R., and Holland, G. J., 1996, Atlas of the Oceans: Wind and Wave Climate, Pergamon, Elsevier Science, USA.
  • Panigrahi, J. K., et al., 2001, “Analysis of 3g-WAM simulations for the India Ocean using IRS-P4 analysed wind fields during July-August 1999,” In Proc. of the Indian Soc. for Remote Sensing, SAC, Ahmedabad, INDIA.
  • Swain, J., Panigrahi, J. K., and Prasada, Rao, C. V. K., 2001, “Validation of 3g-WAM hindcast wave fields using IRS-P4 data,” In Proc. of the International Conference in Ocean Engineering, IITM, Chennai, India, pp. 115-123.
  • Swain, J., et al., 2002, “Comparison of 3g-WAM predictions with timeseries measurements at two selected locations in the Indian Seas,” In Proc. of the International Conference on Sonar-Sensors and Systems, 2, pp. 509-515.
  • Swain, J., et al., 2003a, “Performance of 3g-WAM using IRS-P4 winds for its operational implementation in the Indian Ocean,” In Proc. of the Symposium on Microwave Remote Sensing Applications, 21-23 January 2003, IITB, Mumbai, India (Mumbai, India: CSRE).
  • Swain, J., et. al., 2000, “Observed wind and wave characteristics in the South Central Bay of Bengal during BOBMEX-99,” In Proc. TROPMET 2000: Ocean and Atmosphere, pp. 406-409.
  • The BOBMEX Team., 2000, “Oceanographic features in the central Bay of Bengal during “BOBMEX-99,” Departmental Research Report, NPOL/RR-11/20, Naval Physical and Oceanographic Laboratory, Cochin.

Abstract Views: 864

PDF Views: 0




  • WAM Validation Studies in the North Indian Ocean using NCMRWF Analyzed Wind Fields

Abstract Views: 864  |  PDF Views: 0

Authors

J. Swain
Naval Physical and Oceanographic Laboratory (NPOL), Thrikkakara, Cochin-682 021, India
J. K. Panigrahi
DHI-NTU Research Centre, DHI Water and Environment, 200, Pandan Loop, Pantech-21, Singapore-128388, Singapore
P. A. Umesh
Naval Physical and Oceanographic Laboratory (NPOL), Thrikkakara, Cochin-682 021, India
M. Baba
Centre for Advanced Training in Earth System Sciences and Climate (CAT-ESSC), Indian Institute of Tropical Meteorology, Pune-411008, India
A. S. N. Murty
Department of Marine Science, Berhampur University, Berhampur-7, India
A. N. Balchand
Department of Physical Oceanography, Cochin University of Science & Technology (CUSAT), Kochi-682 016, India

Abstract


With the launch of Oceansat-I (IRS-P4), it became a reality to carry out validations of third generation wave model 3g-WAM in the North Indian Ocean region using the IRS-P4 analyzed wind fields provided by the National Centre for Medium Range Weather Forecasting (NCMRWF), New Delhi, India. However, the model predicted wave fields were to be still analyzed and further validated using all available field measurements which was the primary task before the scientific community. This study, describes the wave model validation studies carried out at Naval Physical and Oceanographic Laboratory (NPOL), Cochin, India through a collaborative research programme between NPOL and Space Application Centre (SAC), as part of the IRS-P4, MSMR Utilization Programme. Under this collaborative programme, 3g-WAM wave hindcasts were carried out for the Indian Ocean from 30°E to 120°E and 30°S to 30°N using the analyzed winds of NCMRWF and appropriate open sea boundary inputs. WAM was executed using six hourly input fields over 1.5°x1.5° grid resolution. The outputs of the model such as wave height, peak wave period, mean wave period and mean wave directions were compared with the time-series buoy measurements of National Institute of Ocean Technology (NIOT), Chennai, India and other available measurements. Comparisons between the predicted and observed wave parameters were very encouraging. However, the model predictions of significant wave height were overestimated during the extreme wind and wave conditions. By and large, the WAM predictions were quite reliable for the south-west monsoon (May-September) periods in spite of the limitations. These validation studies have revealed that, the performance of WAM was satisfactory and the hindcast wave fields of WAM for the North Indian Ocean can be utilized for various user applications in the deep waters over 30 meters.

Keywords


OCEANSAT I, WAM, IRS-P4 Analyzed Winds, Wave Model Validation.

References