TY - JOUR
T1 - The Madden–Julian Oscillation in the Energy Exascale Earth System Model Version 1
AU - Kim, Daehyun
AU - Kang, Daehyun
AU - Ahn, Min Seop
AU - DeMott, Charlotte
AU - Hsu, Chia Wei
AU - Yoo, Changhyun
AU - Leung, L. Ruby
AU - Hagos, Samson
AU - Rasch, Philip J.
N1 - Funding Information:
D. Kim was supported by the DOE RGMA program (DE‐SC0016223), the NOAA CVP program (NA18OAR4310300), the NASA MAP program (80NSSC17K0227), and the Brain Pool program funded by the Ministry of Science and ICT through the National Research Foundation of Korea (NRF‐2021H1D3A2A01039352). D. Kang was supported by Sejong Science Fellowship funded by the National Research Foundation of Korea (NRF‐2021R1C1C2004621). Work of the LLNL‐affiliated author (M.‐S. Ahn) was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE‐AC52‐07NA27344 and their efforts were supported by the Regional and Global Model Analysis program area of the United States Department of Energy’s Office of Science. C. DeMott and C.‐W. Hsu were supported by the DOE RGMA program (DE‐SC0020092). C. Yoo were supported by the National Research Foundation of Korea (NRF‐2018R1A6A1A08025520 and NRF‐2019R1C1C1003161). R. Leung, S. Hagos, and P. Rasch were also supported by the Office of Science of U.S. Department of Energy Biological and Environmental Research as part of the Regional and Global Model Analysis program area. PNNL is operated for the Department of Energy by Battelle Memorial Institute under contract DE‐AC05‐76RL01830.
Publisher Copyright:
© 2022 The Authors. Journal of Advances in Modeling Earth Systems published by Wiley Periodicals LLC on behalf of American Geophysical Union.
PY - 2022/2
Y1 - 2022/2
N2 - The present study examines the characteristics of the Madden–Julian Oscillation (MJO) events represented in the Energy Exascale Earth System Model version 1 (E3SMv1), DOE’s new Earth system model. The coupled E3SMv1 realistically simulates the eastward propagation of precipitation and moist static energy (MSE) anomalies associated with the MJO. As in observations, horizontal moisture advection and longwave radiative feedback are found to be the dominant processes in E3SMv1 that lead to the eastward movement and maintenance of the MJO MSE anomalies, respectively. Modulation of the diurnal cycle of precipitation in the Maritime Continent region by the MJO is also well represented in the model despite systematic biases in the magnitude and phase of the precipitation diurnal cycle. On the MJO impact over the midlatitude, E3SMv1 reasonably captures the pattern of the MJO teleconnections across the North Pacific and North America, with improvement in the performance in a high-resolution version, despite the magnitude being a bit weaker than the observed. Regarding the interannual variability of the MJO, the El Niño-Southern Oscillation (ENSO) modulation of the zonal extent of MJO’s eastward propagation, as well as associated changes in the mean state moisture gradient in the tropical west Pacific, are well reproduced in the model. However, MJO in E3SMv1 exhibits no sensitivity to the Quasi-Biennial Oscillation (QBO), with the MJO propagation characteristics being almost identical between easterly QBO and westerly QBO years. Processes that have been suggested as critical to MJO simulation are also examined by utilizing recently developed process-oriented diagnostics.
AB - The present study examines the characteristics of the Madden–Julian Oscillation (MJO) events represented in the Energy Exascale Earth System Model version 1 (E3SMv1), DOE’s new Earth system model. The coupled E3SMv1 realistically simulates the eastward propagation of precipitation and moist static energy (MSE) anomalies associated with the MJO. As in observations, horizontal moisture advection and longwave radiative feedback are found to be the dominant processes in E3SMv1 that lead to the eastward movement and maintenance of the MJO MSE anomalies, respectively. Modulation of the diurnal cycle of precipitation in the Maritime Continent region by the MJO is also well represented in the model despite systematic biases in the magnitude and phase of the precipitation diurnal cycle. On the MJO impact over the midlatitude, E3SMv1 reasonably captures the pattern of the MJO teleconnections across the North Pacific and North America, with improvement in the performance in a high-resolution version, despite the magnitude being a bit weaker than the observed. Regarding the interannual variability of the MJO, the El Niño-Southern Oscillation (ENSO) modulation of the zonal extent of MJO’s eastward propagation, as well as associated changes in the mean state moisture gradient in the tropical west Pacific, are well reproduced in the model. However, MJO in E3SMv1 exhibits no sensitivity to the Quasi-Biennial Oscillation (QBO), with the MJO propagation characteristics being almost identical between easterly QBO and westerly QBO years. Processes that have been suggested as critical to MJO simulation are also examined by utilizing recently developed process-oriented diagnostics.
KW - Earth system modeling
KW - Madden-Julian oscillation
KW - process-oriented diagnostics
UR - http://www.scopus.com/inward/record.url?scp=85125135764&partnerID=8YFLogxK
U2 - 10.1029/2021MS002842
DO - 10.1029/2021MS002842
M3 - Article
AN - SCOPUS:85125135764
SN - 1942-2466
VL - 14
JO - Journal of Advances in Modeling Earth Systems
JF - Journal of Advances in Modeling Earth Systems
IS - 2
M1 - e2021MS002842
ER -