热带气象学报2024，Vol.40Issue(3)：477-490,14.DOI:10.16032/j.issn.1004-4965.2024.044
模式垂直分辨率对模拟ENSO遥相关的影响
Impact of Vertical Resolution on ENSO Teleconnection Simulation
摘要
Abstract
Model resolution significantly influences the simulation effect of climate models.However,model vertical resolution has not been a primary focus in current model development.To evaluate the importance of model vertical resolution in climate modeling,this study took the El Niño-Southern Oscillation(ENSO)teleconnection as an example and explored the impact of different vertical resolution settings in the Community Earth System Model(CESM)on the simulation of ENSO teleconnections in the stratosphere and the troposphere.The results show that increasing vertical resolution can significantly boost the model's capability to simulate ENSO teleconnection.Based on the fifth generation reanalysis(ERA5)dataset from the European Centre for Medium-Range Weather Forecasts,the present study explored the effect of ENSO on zonal mean temperature and found a'negative-positive-negative'tripole mode in winter over the mid-to-high latitudes in the Northern Hemisphere.The CESM model with default vertical resolution(66 vertical levels,L66)failed in simulating this mode,while the model with higher vertical resolution(103 vertical levels,L103)performed better in capturing this mode.For the horizontal distribution of ENSO teleconnection,the tropospheric signal of ENSO simulated by L66 was stronger than that indicated by the reanalysis data,whereas the signal in L103 was significantly improved.The L103 model also simulated a more accurate ENSO teleconnection in the stratosphere compared to L66.Further analysis shows that the planetary waves simulated by L103 propagated more robustly from the troposphere to the stratosphere,which was more consistent with the ERA5 reanalysis data.Overall,improving vertical resolution can significantly improve the simulation of atmospheric wave activities and the stratosphere-troposphere dynamic coupling,which should be prioritized in model development.关键词
模式垂直分辨率/ENSO的气候效应/平流层-对流层耦合Key words
model vertical resolution/climate effect of ENSO/stratosphere-tropospheric coupling分类
天文与地球科学引用本文复制引用
姜薇,王五科,赵树云,王泓月,朱锦涛..模式垂直分辨率对模拟ENSO遥相关的影响[J].热带气象学报,2024,40(3):477-490,14.基金项目
国家自然科学基金(42075055) （42075055）
国家重点研发计划政府间国际科技创新合作项目(2019YFE0125000)共同资助 （2019YFE0125000）
