Variabilities of Surface Current in the Tropical Pacific Ocean

• 作 者: Anna Zaklikowski
• 机 构: Department of Civil and Environmental Engineering, Clarkson University Potsdam, USA
• 出 处: Journal of Ocean University of Qingdao
• 发表日期: 2002年02期
• 关键词: Tropical latitude stronger salinity contour package

The Simple Ocean Data Assimilation (SODA) package is used to better understand the variabilities of surface current transport in the Tropical Pacific Ocean from 1950 to 1999. Seasonal variation, interannual and decadal variability analyses are conducted on the three major surface currents of the Tropical Pacific Ocean: the North Equatorial Current (NEC), the North Equatorial Countercurrent (NECC), and the South Equatorial Current (SEC). The transport of SEC is quite larger than those of NEC and NECC. The SEC has two maximums in February and August. The NEC has a small annual variation. The NECC has a maximum in October and is very weak in March and April. All currents have remarkable interannual and decadal variabilities. The variabilities of the NEC and the SEC relate to the winds over them well, but the relationship between the NECC and the wind over it is not close. Analysis related to El Nio-Southern Oscillation (ENSO) suggests that before El Nio (La Nia) the SEC is weaker (stronger) and the NECC is stronger (weaker), after El Nio (La Nia) the SEC is stronger (weaker) and the SEC is weaker (stronger). There is no notable relationship between the NEC and ENSO.

The Simple Ocean Data Assimilation (SODA) package is used to better understand the variabilities of surface current transport in the Tropical Pacific Ocean from 1950 to 1999. Seasonal variation, interannual and decadal variability analyzes are conducted on the three major surface currents of the Tropical Pacific Ocean: the North Equatorial Current (NEC), the North Equatorial Countercurrent (NECC), and the South Equatorial Current (SEC). The transport of SEC is quite larger than those of NEC and NECC. The SEC has two maximums in February and August The NEC has a maximum annual variation. The NECC has a maximum in October and is very weak in March and April. All Nodes have remarkable interannual and decadal variabilities. The variabilities of the NEC and the SEC relate to the winds over them well, but the relationship between the NECC and the wind over it is not close. Analysis Related to El Nio-Southern Oscillation (ENSO) suggests that before El Nio (La Nia) the SEC is weaker (stronger) and the NECC is stronger (weaker), after El Nio (La Nia) the SEC is stronger (weaker) and the SEC is weaker (stronger). There is no notable relationship between the NEC and ENSO.