大气强迫日变化对东中国海海温模拟的影响

发布时间：2018-05-20 12:22

  本文选题：大气强迫 + 日变化　； 参考：《中国海洋大学学报(自然科学版)》2017年04期

【摘要】：大气强迫的日变化可以减弱海表温度的水平梯度加强表层与次表层间的垂向混合,从而影响海温的模拟。本文基于区域海洋模式ROMS,利用NCEP/NCAR发布的6h1次的10m风速、短波辐射、海表气压等再分析资料,研究了大气强迫的日变化对东中国海温度模拟的影响。通过与观测资料比对发现,相比于日均大气强迫下的模拟,日变化大气强迫下的模拟与观测更为接近。大气强迫的日变化对东中国海的海-气热通量具有显著影响,能够使东中国海年均海气热通量增加1.4W/m~2,夏季增加13W/m~2,冬季减小10W/m~2。大气强迫的日变化通过海-气界面的热力和动力过程影响水温的垂直结构,加强东中国海的上层混合,使东中国海混合层厚度(MLD)增加约10%;夏季黄海冷水团的平均温度升高0.5℃,体积减少约1/3。
[Abstract]:The diurnal variation of atmospheric forcing can weaken the horizontal gradient of sea surface temperature and strengthen the vertical mixing between surface and subsurface, thus affecting the simulation of sea surface temperature. Based on the regional ocean model (ROMS), the influence of diurnal variation of atmospheric forcing on the temperature simulation of the East China Sea is studied by using the reanalysis data of 10 m wind speed, shortwave radiation and sea surface pressure released by NCEP/NCAR. Compared with the observational data, it is found that the simulation of diurnal atmospheric forcing is closer to that of daily atmospheric forcing. The diurnal variation of atmospheric forcing has a significant effect on the sea-air heat flux in the East China Sea, which can increase the average annual air-sea heat flux by 1.4 W / m ~ (2) in the East China Sea, 13 W / m ~ (2) in summer and 10 W / m ~ (2) in winter. The diurnal variation of atmospheric forcing affects the vertical structure of water temperature through the thermal and dynamic processes of the air-sea interface, strengthens the upper layer mixing in the East China Sea, increases the thickness of the mixing layer in the East China Sea by about 10%, and increases the average temperature of the Huang Hai cold water mass by 0.5 鈩，

本文编号：1914604