PORT, a CESM tool for the diagnosis of radiative forcing

被引:70
作者
Conley, A. J. [1 ]
Lamarque, J. -F. [1 ]
Vitt, F. [1 ]
Collins, W. D. [2 ,3 ]
Kiehl, J. [1 ]
机构
[1] Natl Ctr Atmospher Res, Boulder, CO 80305 USA
[2] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA
基金
美国国家科学基金会;
关键词
INTERCOMPARISON PROJECT ACCMIP; CLIMATE MODEL; ATMOSPHERIC CHEMISTRY; ABSORPTION; OZONE;
D O I
10.5194/gmd-6-469-2013
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The Parallel Offline Radiative Transfer (PORT) model is a stand-alone tool, driven by model-generated datasets, that can be used for any radiation calculation that the underlying radiative transfer schemes can perform, such as diagnosing radiative forcing. In its present distribution, PORT isolates the radiation code from the Community Atmosphere Model (CAM4) in the Community Earth System Model (CESM1). The current configuration focuses on CAM4 radiation with the constituents as represented in present-day conditions in CESM1, along with their optical properties. PORT includes an implementation of stratospheric temperature adjustment under the assumption of fixed dynamical heating, which is necessary to compute radiative forcing in addition to the more straightforward instantaneous radiative forcing. PORT can be extended to use radiative constituent distributions from other models or model simulations. Ultimately, PORT can be used with various radiative transfer models. As illustrations of the use of PORT, we perform the computation of radiative forcing from doubling of carbon dioxide, from the change of tropospheric ozone concentration from the year 1850 to 2000, and from present-day aerosols. The radiative forcing from tropospheric ozone (with respect to 1850) generated by a collection of model simulations under the Atmospheric Chemistry and Climate Model Intercomparison Project is found to be 0.34 (with an intermodel standard deviation of 0.07) W m(-2). Present-day aerosol direct forcing (relative to no aerosols) is found to be -1.3 W m(-2).
引用
收藏
页码:469 / 476
页数:8
相关论文
共 18 条
[1]  
[Anonymous], CLIMATE CHANGE 2001
[3]   Atmospheric radiative transfer modeling: a summary of the AER codes [J].
Clough, SA ;
Shephard, MW ;
Mlawer, E ;
Delamere, JS ;
Iacono, M ;
Cady-Pereira, K ;
Boukabara, S ;
Brown, PD .
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, 2005, 91 (02) :233-244
[4]   A global signature of enhanced shortwave absorption by clouds [J].
Collins, WD .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1998, 103 (D24) :31669-31679
[5]   An updated parameterization for infrared emission and absorption by water vapor in the National Center for Atmospheric Research Community Atmosphere Model [J].
Collins, WD ;
Hackney, JK ;
Edwards, DP .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2002, 107 (D22) :ACL17-1
[6]   Studies with a flexible new radiation code .1. Choosing a configuration for a large-scale model [J].
Edwards, JM ;
Slingo, A .
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 1996, 122 (531) :689-719
[7]  
Fels S. B., 1980, J ATMOS SCI, V37, P1084
[8]   The Community Climate System Model Version 4 [J].
Gent, Peter R. ;
Danabasoglu, Gokhan ;
Donner, Leo J. ;
Holland, Marika M. ;
Hunke, Elizabeth C. ;
Jayne, Steve R. ;
Lawrence, David M. ;
Neale, Richard B. ;
Rasch, Philip J. ;
Vertenstein, Mariana ;
Worley, Patrick H. ;
Yang, Zong-Liang ;
Zhang, Minghua .
JOURNAL OF CLIMATE, 2011, 24 (19) :4973-4991
[9]   Radiative forcing by long-lived greenhouse gases: Calculations with the AER radiative transfer models [J].
Iacono, Michael J. ;
Delamere, Jennifer S. ;
Mlawer, Eli J. ;
Shephard, Mark W. ;
Clough, Shepard A. ;
Collins, William D. .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2008, 113 (D13)
[10]  
KIEHL JT, 1988, J ATMOS SCI, V45, P1798, DOI 10.1175/1520-0469(1988)045<1798:TRDROA>2.0.CO