Environmental and Industrial Safety Section, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, Tamil Nadu, India.
Environ Monit Assess. 2010 Dec;171(1-4):411-24. doi: 10.1007/s10661-009-1287-9. Epub 2010 Jan 8.
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.
在印度东部的卡尔帕卡姆沿海地区，西南季风向东北季风转换期间，观测到海水理化性质发生了显著变化。在转换后期，硝酸盐、总氮和硅酸盐浓度增加。与转换前期和后期相比，氨浓度在转换期间达到峰值。在转换后期，低盐度条件（约 23 个盐度单位）出现，因为表层海水盐度从转换前期值下降了约 10 个盐度单位。伴随着向北到向南的海流反转，浊度、悬浮颗粒物、磷酸盐和总磷的数值略有下降。在转换后期，沿海水中的叶绿素-a 浓度急剧下降（八倍）。
