Impact of Initial Field and Long Wave Radiation on Climate Modeling

Shen Yuanfang; F .Baer; Wang Chao

Vol.14, NO.3, 2003

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2003 > 14(3): 266-276

Shen Yuanfang, F Baer, Wang Chao. Impact of initial field and long wave radiation on climate modeling. J Appl Meteor Sci, 2003, 14(3): 266-276.

Citation:

Shen Yuanfang, F Baer, Wang Chao. Impact of initial field and long wave radiation on climate modeling. J Appl Meteor Sci, 2003, 14(3): 266-276.

Shen Yuanfang, F Baer, Wang Chao. Impact of initial field and long wave radiation on climate modeling. J Appl Meteor Sci, 2003, 14(3): 266-276.

Citation:

Shen Yuanfang, F Baer, Wang Chao. Impact of initial field and long wave radiation on climate modeling. J Appl Meteor Sci, 2003, 14(3): 266-276.

PDF( 936 KB)

Impact of Initial Field and Long Wave Radiation on Climate Modeling

1.
Chinese Academy of Meteorological Sciences, Beijing 100081
2.
Department of Meteorology, UMCP, MD20742, USA
3.
National Satellite Meteorological Center, Beijing 100081

Received Date: 2001-11-09
Rev Recd Date: 2003-04-18
Publish Date: 2003-06-30

Abstract

Abstract

Ten realizations of CCM2 (T42L18) with only slight variations in the initial states have been carried out. The results reveal the response of CCM2 to the initial field, and it is evident that there is substantial variability in the runs, with deviations in many places on the globe and various spectral scales being in excess of 10%. Similar results are found for clouds and temperature. Comparing ten CCM2 algorithm runs with three runs using CCM2, MOR and NMC algorithms, it is evident that the climate simulations for the runs with different algorithms show much larger variability from one another than that for the initial field without changes of LWR algorithms. Comparing the modeling results using the CCM2, MOR and NMC algorithms in the CCM2 model, it can be seen immediately that CCM2 and MOR runs are closer to one another than to the NMC run. Nevertheless, the differences on all charts exceed 10% in many places on the globe, which are far above the impact of the initial field on climate modeling.
- Initial field;
- Long-wave radiation;
- Climate modeling;
- Heating rates

FullText(HTML)

References(14)

Figures and Tables

图 1 200和500 hPa CCM2模式10次运行的后3个月 (1986年12月1日至1987年2月28日) 积分结果的LWR加热率平均和它们的标准差 (单位:K/ d)

DownLoad: Full-Size Img PowerPoint

图 2 CCM2模式10次运行的后3个月 (1986年12月1日至1987年2月28日) 积分结果的LWR加热率平均和它们的标准差随气压与行星波数的分布 (单位:K/ d)

DownLoad: Full-Size Img PowerPoint

图 3 CCM2模式10次运行和应用CCM2、MOR和NMC三种不同LWR算法3次运行的后3个月 (1986年12月1日至1987年2月28日) 积分结果的LWR加热率平均的绝对差随气压与行星波数的分布 (单位:K/ d)

DownLoad: Full-Size Img PowerPoint

图 4 500 hPa CCM2模式应用CCM2、MOR和NMC三种不同LWR算法3次运行的后3个月 (1986年12月1日至1987年2月28日) 积分结果的LWR加热率平均和它们相互间的绝对差 (单位:K/ d)

DownLoad: Full-Size Img PowerPoint

图 5 200 hPa CCM2模式应用CCM2、MOR和NMC三种不同LWR算法3次运行的后3个月 (1986年12月1日至1987年2月28日) 积分结果的温度平均和它们相互间的绝对差 (单位:K)

DownLoad: Full-Size Img PowerPoint

图 6 CCM2模式应用CCM2、MOR和NMC三种不同LWR算法3次运行的后3个月 (1986年12月1日至1987年2月28日) 积分结果的LWR加热率平均和它们相互间的绝对差随气压与行星波数的分布 (单位:K/ d)

DownLoad: Full-Size Img PowerPoint

表 1 CCM2、MOR和NMC三种不同的LWR方案的比较

References

[1]	Fels S B, Kaplan L D. A test of role of longwave radiative transfer in a general circulation model.J. Atmos. Sci., 1975, 32: 779-789. doi: 10.1175/1520-0469(1975)032<0779:ATOTRO>2.0.CO;2
[2]	Ramanathan V, Pitcher E J, Malone R C, et al. The response of a spectral general circulation model to refinements in radiative processes.J. Atmos. Sci., 1983, 40: 605-630. doi: 10.1175/1520-0469(1983)040<0605:TROASG>2.0.CO;2
[3]	Luther F M, Ellingson R G, Fouquart Y, et al. Intercomparison of radiation codes in climate models (ICRCCM): Longwave clear-sky results-A workshop summary.Bull. Am. Meteorol. Soc., 1988, 69: 40-48.
[4]	Ellingson R G, Ellis J, Fels S B. The intercomparison of radiation codes used in climate models: Long wave results.J. Geophys. Res., 1991, 96:8929-8953. doi: 10.1029/90JD01450
[5]	沈元芳, Baer F.全球气候模式对辐射强迫的响应.应用气象学报, 1997, 8(增刊):78-86. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20080615&flag=1
[6]	Morcrette J, J. Impact of changes to radiation transfer parameterization plus cloud optical properties in the ECMWF model. Mon.Wea. Rev., 1990, 118: 847-873. doi: 10.1175/1520-0493(1990)118<0847:IOCTTR>2.0.CO;2
[7]	Morcrette J, J. Radiation and cloud radiative prpperties in the ECMWF forecasting system. J. Geophys. Res., 1991, 96: 9121-9132. doi: 10.1029/89JD01597
[8]	沈元芳, 伊兰, 陈谊, 等.辐射参数化的变化对模式中期和月预报的影响.应用气象学报, 2002, 13(3):299-311. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20020340&flag=1
[9]	颜宏.关于气候预测与模拟若干问题的思考.应用气象学报, 1997, 8(增刊):6-14. http://www.cnki.com.cn/Article/CJFDTOTAL-YYQX7S1.002.htm
[10]	Williamson G S. CCM2 Datasets and Circulation Statistics. NCAR/TN-391+STR, 1993. 23-29.
[11]	Gates W L. AMIP: The atmospheric model intercomparison project. Bull. Amer. Meteor. Soc., 1992, 73: 1962-1970. doi: 10.1175/1520-0477(1992)073<1962:ATAMIP>2.0.CO;2
[12]	Williamson D L, Kiehl J T, et al. Description of the NCAR Community Climate Model. NCAR/TN-382+STR, 1993. 46-61.
[13]	Morcrette J, J, Fouquart Y. On systematic errors in parameterized calculations of longwave radiation transfer. Q.J.R.Meteorol. Soc., 1985, 111: 691-708. doi: 10.1002/qj.49711146903
[14]	Schwarzkopf M D, Fels S B. The simplified exchange method revisited: An accurate, rapid method for computation of infrared cooling rates and fluxes. J. Geophys. Res., 1991, 96: 9075-9096. doi: 10.1029/89JD01598