Spatiotemporal Distribution of CO in the UTLS Region in the Asian Summer Monsoon Season: Analysis of MLS Observations and CMIP6 Simulations

In this study, CO is used as a tracer to evaluate the chemical field related Asian summer monsoon anticyclone (ASMA) in upper troposphere and lower stratosphere (UTLS) region simulated by Coupled Model Intercomparison Project Phase 6 (CMIP6) climate models from multi-spatiotemporal perspective. The results show that simulations of six selected CMIP6 global are well correlated with MLS observations, while each model has its own advantages disadvantages simulation ASMA geopotential height fields. Compared data, all can reasonably simulate high values corresponding anticyclone, although certain biases exist simulations. Each output degrees deviation center position. terms time series, exhibit an interannual variation mixing ratio over ASM features different MLS. general, it impossible identify single determined reproduce observations. future work assess development trend location ASMA, CESM2-WACCM GFDL-ESM4 might be due their better performance than other models.