The Community Earth System Model Version 2 (CESM2)

被引：1610

作者：

Danabasoglu, G. ^{[1
]}

Lamarque, J. -F. ^{[1
]}

Bacmeister, J. ^{[1
]}

Bailey, D. A. ^{[1
]}

DuVivier, A. K. ^{[1
]}

Edwards, J. ^{[1
]}

Emmons, L. K. ^{[2
]}

Fasullo, J. ^{[1
]}

Garcia, R. ^{[2
]}

Gettelman, A. ^{[1
,2
]}

Hannay, C. ^{[1
]}

Holland, M. M. ^{[1
]}

Large, W. G. ^{[1
]}

Lauritzen, P. H. ^{[1
]}

Lawrence, D. M. ^{[1
]}

Lenaerts, J. T. M. ^{[3
]}

Lindsay, K. ^{[1
]}

Lipscomb, W. H. ^{[1
]}

Mills, M. J. ^{[2
]}

Neale, R. ^{[1
]}

Oleson, K. W. ^{[1
]}

Otto-Bliesner, B. ^{[1
]}

Phillips, A. S. ^{[1
]}

Sacks, W. ^{[1
]}

Tilmes, S. ^{[2
]}

Van Kampenhout, L. ^{[4
]}

Vertenstein, M. ^{[1
]}

Bertini, A. ^{[1
]}

Dennis, J. ^{[5
]}

Deser, C. ^{[1
]}

Fischer, C. ^{[1
]}

Fox-Kemper, B. ^{[6
]}

Kay, J. E. ^{[7
]}

Kinnison, D. ^{[2
]}

Kushner, P. J. ^{[8
]}

Larson, V. E. ^{[9
]}

Long, M. C. ^{[1
]}

Mickelson, S. ^{[5
]}

Moore, J. K. ^{[10
]}

Nienhouse, E. ^{[5
]}

Polvani, L. ^{[11
]}

Rasch, P. J. ^{[12
]}

Strand, W. G. ^{[1
]}

机构：

[1] Natl Ctr Atmospher Res, Climate & Global Dynam Lab, POB 3000, Boulder, CO 80307 USA

[2] Natl Ctr Atmospher Res, Atmospher Chem Observat & Modeling Lab, POB 3000, Boulder, CO 80307 USA

[3] Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA

[4] Univ Utrecht, Inst Marine & Atmospher Res Utrecht, Utrecht, Netherlands

[5] Natl Ctr Atmospher Res, Computat & Informat Syst Lab, POB 3000, Boulder, CO 80307 USA

[6] Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA

[7] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA

[8] Univ Toronto, Dept Phys, Toronto, ON, Canada

[9] Univ Wisconsin, Dept Math Sci, Milwaukee, WI 53201 USA

[10] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USA

[11] Columbia Univ, Appl Math Earth & Environm Sci, New York, NY USA

[12] Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA

来源：

JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS | 2020年 / 12卷 / 02期

基金：

美国国家科学基金会;

关键词：

Community Earth System Model (CESM); global coupled Earth system modeling; preindustrial and historical simulations; coupled model development and evaluation; SURFACE MASS-BALANCE; HETEROGENEOUS ICE NUCLEATION; CLIMATE SENSITIVITY; ATMOSPHERE MODEL; LAND MODEL; PART I; SHEET MODEL; OCEAN; TEMPERATURE; IMPACT;

D O I：

10.1029/2019MS001916

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

An overview of the Community Earth System Model Version 2 (CESM2) is provided, including a discussion of the challenges encountered during its development and how they were addressed. In addition, an evaluation of a pair of CESM2 long preindustrial control and historical ensemble simulations is presented. These simulations were performed using the nominal 1 degrees horizontal resolution configuration of the coupled model with both the "low-top" (40 km, with limited chemistry) and "high-top" (130 km, with comprehensive chemistry) versions of the atmospheric component. CESM2 contains many substantial science and infrastructure improvements and new capabilities since its previous major release, CESM1, resulting in improved historical simulations in comparison to CESM1 and available observations. These include major reductions in low-latitude precipitation and shortwave cloud forcing biases; better representation of the Madden-Julian Oscillation; better El Nino-Southern Oscillation-related teleconnections; and a global land carbon accumulation trend that agrees well with observationally based estimates. Most tropospheric and surface features of the low- and high-top simulations are very similar to each other, so these improvements are present in both configurations. CESM2 has an equilibrium climate sensitivity of 5.1-5.3 degrees C, larger than in CESM1, primarily due to a combination of relatively small changes to cloud microphysics and boundary layer parameters. In contrast, CESM2's transient climate response of 1.9-2.0 degrees C is comparable to that of CESM1. The model outputs from these and many other simulations are available to the research community, and they represent CESM2's contributions to the Coupled Model Intercomparison Project Phase 6.

引用

页数：35

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