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An Assessment of Short-term Global and East Asian Local Climate Feedbacks using New Radiative Kernels

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Abstract

This study estimates short-term climate feedbacks by using a new set of radiative kernels applied to observations and the Coupled Model Intercomparison Project Phase 6 (CMIP6) simulations. The new kernels are generated based on multiyear satellite observations, and they can well reproduce the top-of-atmosphere (TOA) radiation budget. The choice of radiative kernels influences the feedback estimation, especially the surface albedo feedback and cloud feedback in the Arctic and the Southern Ocean. Observational estimates show that tropospheric water vapor feedback makes the largest contribution to global warming, while lapse rate feedback is the largest contributor to local warming over East Asia. Compared to the observations, biases occur but differ when simulating global and East Asian local climate feedbacks. CMIP6 models overestimate global mean Planck, lapse rate, stratospheric temperature and water vapor, and cloud feedbacks, but underestimate global mean tropospheric water vapor and surface albedo feedbacks. Over East Asia, local Planck and lapse rate feedbacks are underestimated, while tropospheric water vapor, stratospheric temperature, and cloud feedbacks are overestimated. The simulation biases in local longwave (LW) and shortwave (SW) cloud feedbacks over East Asia are considerable, probably due to the failure in simulating cloud fraction response of marine cirrostratus, deep convective cloud, and stratus. The intermodel spread of cloud feedback is the largest for both global and East Asian local feedback processes. Our results suggest that contemporary climate models are still difficult to accurately simulate global and local climate feedback processes.

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Data Availability

The AIRS and MERRA-2 data used in this study are available at: https://disc.gsfc.nasa.gov/. The CERES datasets (EBAF and SYN1deg) are available at: https://ceres.larc.nasa.gov/. The CMIP6 data are available at: https://esgf-node.llnl.gov/search/cmip6/. The ERA-Interim data are available at: https://apps.ecmwf.int/datasets/. The MODIS data are available at: https://ladsweb.modaps.eosdis.nasa.gov/search/. The newly developed radiative kernels in this study are available from the corresponding author on reasonable request.

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Acknowledgements

This work was financially supported by the National Key R&D Program of China (2017YFA0603502), the (Key) National Natural Science Foundation of China (91644211), and the S&T Development Fund of Chinese Academy of Meteorological Sciences (2021KJ004&2022KJ0019).

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Contributions

Conceptualization: Hua Zhang and Fei Wang; Methodology: Fei Wang and Hua Zhang; Formal analysis and investigation: Fei Wang, Hua Zhang, and Xixun Zhou; Writing - original draft preparation: Fei Wang; Writing - review and editing: Fei Wang, Hua Zhang, Qiuyan Wang, and Bing Xie; Resources: Qingquan Liu. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Hua Zhang.

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Funding

This work was financially supported by the National Key R&D Program of China (2017YFA0603502), the (Key) National Natural Science Foundation of China (91,644,211), and the S&T Development Fund of Chinese Academy of Meteorological Sciences (2021KJ004&2022KJ0019).

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The authors have no conflicts of interest to declare that are relevant to the content of this article.

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Wang, F., Zhang, H., Wang, Q. et al. An Assessment of Short-term Global and East Asian Local Climate Feedbacks using New Radiative Kernels. Clim Dyn 60, 1329–1349 (2023). https://doi.org/10.1007/s00382-022-06369-z

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  • DOI: https://doi.org/10.1007/s00382-022-06369-z

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