B35. On the use of nudging in EAMv1

Poster Title	Impact of nudging strategy on the climate representativeness and hindcast skill of constrained EAMv1 simulations
First Author	Jian Sun (Unlicensed)
Topic	atmospheric model development, E3SM evaluation, software tools
Affiliation	NGD Architecture Software and Algorithm / Watercycle
Link to document

Title

Impact of nudging strategy on the climate representativeness and hindcast skill of constrained EAMv1 simulations

Authors

Jian Sun (Unlicensed), Kai Zhang, Hui Wan, Po-Lun Ma, Qi Tang Shixuan Zhang

Abstract

Nudging is a simulation technique widely used in sensitivity studies and in the evaluation of atmosphere models. Care is needed in the experimental setup in order to achieve the desired constraint on the simulated atmospheric processes without introducing undue intervention. In this study, we revised the nudging implementation in E3SM Atmosphere Model version 1 (EAMv1) and conducted sensitivity experiments to identify setups that can give results representative of the climate simulated by the unnudged model and meanwhile reasonably capture characteristics of the observed meteorological conditions to facilitate the comparison of model results with measurements.