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A reduced vertically integrated upper mixed layer model is set up to numerically study the thermodynamic process of the formation of the “Nansha warm water”(NWW) in the Nansha Islands sea areas in spring. According to the numerical experiments, it is shown that, in spring, the formation of the NWW is mainly due to the sea surface net heat flux and the local weak current strength; the contribution from temperature advection transport and warm water exchange with the outer seas (Sulu Sea or south of Sunda shelf) is very little. In the sea areas where the current is strong, the advection may also play an important role in the temperature field.
A reduced vertically integrated upper mixed layer model is set up to numerically study the thermodynamic process of the formation of the “Nansha warm water” (NWW) in the Nansha Islands sea areas in spring. According to the numerical experiments, it is shown that in spring, the formation of the NWW is mainly due to the sea surface net heat flux and the local weak current strength; the contribution from temperature advection transport and warm water exchange with the outer seas (Sulu Sea or south of Sunda shelf) is the little. In the sea areas where the current is strong, the advection may also play an important role in the temperature field.