Physical oceanographic conditions during GasEx-2001

摘要: [1] GasEx-2001 is a study of air-sea gas exchange in region CO2 outgassing. The bulk the experiment followed drifting array near-surface instruments deployed during second half February 2001 just south equator central Pacific Ocean. Physical oceanographic conditions including local currents, seasonal cycle, Kelvin waves, and tropical instability waves are described using shipboard data variety other sources to set large-scale context for GasEx-2001. Local physical GasEx-2001 then analyzed simple one-dimensional mixed layer model. thermocline shoals about 13 m over 15-day experiment, implying an upwelling rate 1 × 10−5 s−1. Zonal velocity surface-intensified westward, with vertical shear mostly through thermocline. Meridional also strongly sheared maximum equatorward flow that much reduced by 17-m depth. model exhibits more warming course than observed. Prescribing closes heat budget within error estimates. Entrainment at base plays limited role budgets carbon water properties. Vertical horizontal slippage surface have small (but uncertain) roles these budgets.