CESM2 Pacific Pacemaker Ensemble

A 10-member ensemble of CESM2 (1 degree spatial resolution) simulations in which time-evolving SST anomalies in the eastern tropical Pacific are nudged to observations (NOAA Extended Reconstruction Sea Surface Temperature version 5: ERSSTv5) during 1880-2019. In this way, the observed evolution of ENSO is maintained in each simulation (i.e., ENSO is the pacemaker), with the rest of the model’s coupled climate system free to evolve. Note that only the SST anomalies, not the total SST, are nudged to observations, maintaining the model’s mean state, including any model biases. In the East Pacific, the nudging is full strength between 15S-15N and from the dateline to the American coast with a 5 degree latitude buffer region to the south and north where the strength of the relaxation is linearly reduced. West of the dateline, the nudging mask takes the form of a wedge shape, tapering off in latitude toward the Maritime continent. More information can be found at https://www.cesm.ucar.edu/working_groups/CVC/simulations/cesm2-pacific_pacemaker.html

搜集汇总

背景与挑战

背景概述

该数据集包含10个CESM2模式模拟成员，通过将热带东太平洋海表温度异常约束到观测数据，使ENSO的观测演变在每次模拟中得以保持，从而研究其对全球气候系统的影响。数据覆盖1880年至2019年，时间分辨率为3小时、日、月等，包含大气、海洋、陆地等变量，以netCDF格式存储，总容量约51.42 TB。