Annual Report 2009-2010 - Ministry Of Earth Sciences

Fig. 3.1: Error estimate of wave forecast using the buoy data during SW monsoon and extreme conditions
Percentage error
50
45
40
35
30
25
20
15
10
5
0
Error during South West monsoon
Off Paradeep (DS4)
Off Vizag (DS5)
Puducherry coast
Tuticorin Coast (SW5)
Day 1 Day 2 Day 3 Day 4 Day 5 Day 6
Percentage error
50
45
40
35
30
25
20
15
10
5
0
Error during extreme conditions
Day 1 Day 2 Day 3 Day 4 Day 5 Day 6
AKASH
NARGIS
SIDR
Four new parameters, namely, sea surface
currents, MLD, depth of thermocline and SST were
also added to Ocean State Forecasting services.
The ocean general circulation model, Regional
Ocean Model System (ROMS), has been set up
and adopted for the Indian Ocean region for this
purpose. Five day forecasts of surface currents, sea
surface temperature, mixed layer depth and depth
of 20°C isotherm (as an indicator of the depth of
thermocline) are made available for five days in
advance over the Indian Ocean region at 0.25°x
0.25° spatial resolution. The forecasted winds and
air-sea fluxes available from NCMRWF are used to
force the model.
A new web interface was designed to disseminate
the forecasts together with the forecasts on waves
and winds.
3.3 Ocean Data Management and
Dissemination
INCOIS the dissemination of moored buoy data to
the users [IMD (Delhi and Chennai), Directorate
of Naval Oceanology and Meteorology (Mumbai,
Port Blair, Vizag, Goa, Kochi), and Coast Guard
(Chennai)] by email and also continued to receive,
process and archive the remote sensing data from
AVHRR (NOAA-17,18) and MODIS (Aqua and
Terra) data in real time. The data products (SST,
Chlorophyll, Aerosol Optical Depth, Clouds etc)
were generated and published in real time on
INCOIS website as well as provided to the users as
per their requirement.
The following in situ data from various PIs and
institutions were added to the database. The data
are processed, quality checked and added to the
existing database.
• CTD (677 stations during 1998-2002),
ADCP and Sea-truth data from CMLRE
• Wave rider buoy data off Gopalpur
(May 08-Jun 09) from ICMAM
• AWS onboard ORV Sagar Nidhi (Jul 2009-
till date)
• Hydrographic Data for the Indian Ocean
1976-2005 from NIO
• SeaWifs (1999-2003).
One of the major achievements of the data
management group during the past year is the
development of an ‘Integrated in situ data and
information system’ and its integration with
the existing data base. This allows the user for
querying, searching, visualising and downloading
of in situ data from wide variety of in situ ocean
observing systems.
Other notable achievements are: (i) development of
software application for automatic data reception
from AWS, conversion, processing and loading that
in oracle database; (ii) generation of the metadata
from moored buoys in OceanSITES format; (iii)
development of codes for the processing of data
12 Ministry of Earth Sciences : Annual Report 2009-10