Seasonal features of the dissolved oxygen maximum in vertical distribution in the Nansha Islands

Based on the investigation information from four cruises on the Nansha Islands in May 1990, December 1993, September 1994 and July 1999, respectively, distribution features and seasonal variations for dissolved oxygen maximum in vertical profile in waters of the Nansha Islands are studied. By comparing with the dissolved oxygen maximum occurred in the East China Sea and the Huanghai Sea in spring and summer, it is found that seasonal features of the dissolved oxygen maximum in the Nansha Islands differ from those in the East China Sea and the Huanghai Sea in many sides.