Environmental Monitoring and Assessment

, Volume 171, Issue 1–4, pp 411–424 | Cite as

Variations of physicochemical properties in Kalpakkam coastal waters, east coast of India, during southwest to northeast monsoon transition period

  • Kamala Kanta Satpathy
  • Ajit K. Mohanty
  • Gouri Sahu
  • Santosh K. Sarkar
  • Usha Natesan
  • R. Venkatesan
  • M. V. R. Prasad
Article

Abstract

A significant variation in physicochemical properties of the Kalpakkam coastal waters, eastern part of India, was observed during the event of southwest to northeast monsoon transition. Increase in nitrate, total nitrogen, and silicate concentrations were noticed during post-transition period. Ammonia concentration was at peak during transition period as compared to pre- and post-transition periods. Hypo-saline condition (~23 psu) was observed during post-transition as the surface water salinity decreased by ~10 psu from the pre-transitional values. Turbidity, suspended particulate matter, phosphate and total phosphorous values decreased marginally, coinciding with northward to southward current reversal. A drastic decrease (eightfold) in chlorophyll-a concentration was observed in the coastal water during post-transition period.

Keywords

Monsoon transitions Coastal waters Physicochemical properties Nutrients Bay of Bengal East cost of India 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Kamala Kanta Satpathy
    • 1
  • Ajit K. Mohanty
    • 1
  • Gouri Sahu
    • 1
  • Santosh K. Sarkar
    • 4
  • Usha Natesan
    • 2
  • R. Venkatesan
    • 3
  • M. V. R. Prasad
    • 1
  1. 1.Environmental and Industrial Safety SectionIndira Gandhi Centre for Atomic ResearchKalpakkamIndia
  2. 2.Centre for Environmental StudiesAnna UniversityChennaiIndia
  3. 3.National Institute of Ocean TechnologyChennaiIndia
  4. 4.Department of Marine ScienceUniversity of CalcuttaKolkataIndia

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