What question did this study set out to answer?

To evaluate simulated high-latitude cloud phase characteristics in the atmosphere model EAMv2 relative to EAMv1 and satellite lidar observations.

October 27, 2022Journal of Geophysical Research AtmospheresOpen Access

Cloud Phase Simulation at High Latitudes in EAMv2: Evaluation Using CALIPSO Observations and Comparison With EAMv1

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Authors

MZMeng ZhangLawrence Livermore National Laboratory SXShaocheng XieLawrence Livermore National Laboratory XLXiaohong LiuSun Yat-sen University

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Implication

Model evaluation reveals reduced cloud ice underestimation across high-latitude clouds, highlighting the critical impact of convection parameterizations on climate simulation accuracy.

Key Points

To evaluate simulated high-latitude cloud phase characteristics in the atmosphere model EAMv2 relative to EAMv1 and satellite lidar observations.
Simulated cloud phases in the Energy Exascale Earth System Model versions 1 (EAMv1) and 2 (EAMv2).
Compared simulated cloud phases against the GCM-Oriented CALIPSO Cloud Product (CALIPSO-GOCCP) using a satellite instrument simulator.
Evaluated the roles of modified Wegener-Bergeron-Findeisen microphysics and an updated deep convection trigger (dCAPE_ULL).
EAMv2 significantly reduced the underestimation of cloud ice in Arctic mixed-phase clouds compared to EAMv1, primarily driven by modifications to the Wegener-Bergeron-Findeisen process.
The new deep convection trigger substantially improved cloud phase simulations over the Norwegian Sea, Barents Sea, and the Southern Ocean.
Systematic biases persisted in EAMv2, including near-surface overestimation of supercooled liquid clouds globally and underestimation of ice clouds over Antarctica.

Cite This Study

Zhang et al. (2022) studied this question.

synapsesocial.com/papers/6a7fbc04b407ef5628422485 https://doi.org/10.1029/2022jd037100

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Implication

Model evaluation reveals reduced cloud ice underestimation across high-latitude clouds, highlighting the critical impact of convection parameterizations on climate simulation accuracy.

Cloud Phase Simulation at High Latitudes in EAMv2: Evaluation Using CALIPSO Observations and Comparison With EAMv1

Discussion

Member takes

Implication

Key Points

Cite This Study

Cloud Phase Simulation at High Latitudes in EAMv2: Evaluation Using CALIPSO Observations and Comparison With EAMv1

Discussion

Member takes

Implication

Key Points

Cite This Study

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