An SST-based velocity diagnostic model for TIW velocities

This is a code to calculate sea surface meridional velocities of tropical instability waves (TIWs) in Pacific Ocean from satellite SST for the period between 1981-2024. The input is satellite SST from NOAA OISSTv2 (3-day and 0.5deg latitude x 1deg longitude resolution), and two space-varying paramters: best-fit mean zonal flows and damping rates for SST variability.The output is the surface meridional velcoties of TIWs.

本代码用于计算1981—2024年太平洋海域热带不稳定波（Tropical Instability Waves, TIWs）的海面经向流速，计算基于卫星海表温度（Sea Surface Temperature, SST）数据。输入数据包含两部分：一是来自美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）最优插值海表温度第二版（NOAA OISSTv2）的数据集，其时间分辨率为3天，空间分辨率为0.5°纬度×1°经度；二是两类空间变化参数，即针对海表温度变率的最优拟合平均纬向流与阻尼率。最终输出为热带不稳定波的海面经向流速。