Cruise No. EP01-1

Access URI: https://iioe-2.incois.gov.in/IIOE-2/EP01-1Info.jsp

Alternate Title: ORV SAGAR NIDHI Cruise No SN-105

Brief Description (Abstract):

The Second International Indian Ocean Expedition (IIOE-2) is a major global scientific program which will engage the international scientific community in collaborative oceanographic and atmospheric research from coastal environments to the deep sea over the period 2015-2020, revealing new information on the Indian Ocean (i.e. its currents, its influence upon the climate, its marine ecosystems) which is fundamental for future sustainable development and expansion of the Indian Ocean's blue economy. A large number of scientists from research institutions from around the Indian Ocean and beyond are planning their involvement in IIOE-2 in accordance with the overarching six scientific themes of the program. Already some large collaborative research projects are under development, and it is anticipated that by the time these projects are underway, many more will be in planning or about to commence as the scope and global engagement in IIOE-2 grows. The first scientific cruise of IIOE-2 on board the Indian Research Vessel Sagar Nidhi was flagged off from the Mormugao (Goa) harbour on the evening of 4th December 2015 by Shri Y. S. Chowdary, India's Minister of State for Science and Technology and Earth Sciences. The expedition led by Prof. P. N. Vinayachandran of Indian Institute of Science (IISc), Bangalore and Dr. Satya Prakash of INCOIS, concluded at Mauritius on 22 December 2015 after 18 days of sustained observations and data collection in the western Indian Ocean enroute to Mauritius. Besides twelve scientists from six national research institutions and the Goa University, there were participants from Mauritius, Israel, Singapore, Australia and the UK. The major goal of this multi-disciplinary scientific expedition was to understand the structure of the water masses in the western Indian Ocean along 67°E longitude and to assess the difference in their characteristics with respect to observations made in the past. The water masses from Red Sea, Persian Gulf and northern Arabian Sea have been observed in this part of the Indian Ocean at different depth layers. Underwater profiles of current, temperature, salinity, oxygen, light and chlorophyll were measured during the cruise. In addition, water samples were collected to a depth of 1000m for various chemical and biological analyses. Samples of zooplankton were collected using nets towed behind the stern of the ship.

Status: Completed

Presentation Format: TableDigital

Distribution Format: Unknown

Distribution Format Version: Unknown

Supplemental Information:

The primary objective of the cruise no SN-105 is to map the water masses in the western Indian Ocean using CTD observation. It is expected that such an effort would make it possible to compare the water mass structure with the observations made during IIOE and possibly asses the differences between the two. The second major objective is to understand the physical-biological coupling and biogeochemistry in the western Equatorial Indian Ocean. Specific cruise objectives of SN-105 are : 1. CTD profiles upto the deep ocean at an interval of 1 degree latitude along with underway ship-board ADCP, thermosalinograph and AWS measurements. 2. Observations and sampling at 11 selected stations i) For chemical and biological analysis. ii) For optical and radiometric (IOP) analysis iii) For estimation of phytoplankton biomass iv) Radiometer measurements v) Ring net and bongo net trawling for zoo plankton sampling vi) Sampling for primary productivity estimation vii) Sampling for isotope analysis viii) Accoustic measurements ix) FRRR measurements

Keyword(s): Earth Science-Oceans-Ocean Winds-Surface Winds, Earth Science-Atmosphere-Altitude, Earth Science-Atmosphere-Atmospheric Temperature, Earth Science-Atmosphere-Atmospheric Pressure, Earth Science-Atmosphere-Atmospheric Winds-Surface Winds, Earth Science-Oceans-Ocean Chemistry-Alkalinity, Earth Science-Oceans-Ocean Chemistry-Ph, Earth Science-Oceans-Ocean Chemistry-Nutrients, Earth Science-Oceans-Ocean Optics-Irradiance, Earth Science-Oceans-Ocean Optics-Radiance, Earth Science-Oceans-Ocean Optics-Turbidity, Earth Science-Oceans-Ocean Optics-Photosynthetically Active Radiation, Earth Science-Oceans-Ocean Optics-Absorption, Earth Science-Oceans-Ocean Chemistry-Chlorophyll, Earth Science-Oceans-Salinity/Density-Density, Earth Science-Oceans-Ocean Acoustics-Ambient Noise, Earth Science-Oceans-Bathymetry/Seafloor Topography-Bathymetry, Earth Science-Oceans-Bathymetry/Seafloor Topography-Seafloor Topography, Earth Science-Oceans-Salinity/Density-Conductivity, Earth Science-Oceans-Ocean Temperature-Water Temperature, Earth Science-Oceans-Ocean Circulation-Ocean Currents, Earth Science-Atmosphere-Atmospheric Chemistry-Carbon And Hydrocarbon Compounds-Carbon Dioxide, Earth Science-Oceans-Salinity/Density-Salinity, Earth Science-Oceans-Ocean Chemistry-Oxygen, Earth Science-Oceans-Ocean Optics-Fluorescence, Earth Science-Oceans-Ocean Temperature-Sea Surface Temperature,

Place/Location(s): Arabian Sea,

Project: IIOE-2,

Topic Category(s): ClimatologyMeteorologyAtmosphere, Oceans,

Date(s): 2016-07-27 (Publication),

Resource Contact(s):
1. Name : Prof. P. N. Vinayachandran
    Position : Professor
    Role : PrincipalInvestigator
    Phone : +91-80-2293 3065
    E-Mail : vinay [ at ] caos.iisc.ernet.in
    Organization Name : Centre for Atmospheric & Oceanic Sciences (CAOS) (IISC)
    Address : Centre for Atmospheric & Oceanic Sciences, Indian Institute of Science, Mathikere
    City : Bengaluru
    State : Karnataka
    Postal Code : 560012
    Country : IND

Distributor Contact(s):
1. Name : Dr S. Rajan
    Position : JPO INDIA IIOE-2 Coordinator
    Role : Distributor
    Phone : +91-40-23886142
    E-Mail : iioe-2 [ at ] incois.gov.in
    Organization Name : Indian National Centre for Ocean Information Services (INCOIS)
    Address : Ocean Valley, Pragathi Nagar (BO), Nizampet (SO)
    City : Hyderabad
    State : Telangana
    Postal Code : 500090
    Country : IND

Metadata Contact(s):
1. Name : Dr S. Rajan
    Position : JPO INDIA IIOE-2 Coordinator
    Role : PointOfContact
    Phone : +91-40-23886142
    E-Mail : iioe-2 [ at ] incois.gov.in
    Organization Name : Indian National Centre for Ocean Information Services (INCOIS)
    Address : Ocean Valley, Pragathi Nagar (BO), Nizampet (SO)
    City : Hyderabad
    State : Telangana
    Postal Code : 500090
    Country : IND

Extent:
Start Date : 2015-12-04
End Date   : 2015-12-22