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Future climate simulation with CAM4-chem chemistry mechanism

L

liurj04@gmail_com

Member
 Hello! 
I am running future climate simulation (year 2050) under RCP8.5 scenario with CAM4-chem chemistry mechanism. The compest is FSSOA. The model version is CESM1_2_2 and the resolution is f19_f19.This simulation is running for 11 years, when I check the surface temperature of the simulation, I find temperature change is very smallcomparing to 2000 simulation. The global mean surface temperature change is only 0.3K.  I calculate the the temperature change (2050-2000) in CMIP5 RCP 8.5 simulation, and the global mean tempearture change is about 1.4K. So I think maybe some model settings are wrong in my simulation. The model settings are as follows.   Could someone please give me a suggestion about this, Thanks ! 1) In order to simulate the future climate, I set the greenhouse gas forcing to 2050 value by changing user_nl_cam    flbc_cycle_yr          = 2050    flbc_file              = '/home/inputdata/atm/waccm/lb/LBC_1765-2100_1.9x2.5_CCMI_RCP85_za_c130313.nc'    LBC file is downloaded from CESM inputdata ftp2) SST data     the 2050 SST data is downloaded from CESM inputdata : sst_BRCP85C5CNBDRD_ensmean_1x1_2006-2100_c150729.nc, I change this data to      1.9x2.5 resolution, and creat a new SST file.      set the new file path in user_nl_cice :  stream_fldfilename = '/home/sst/sst_HadOIBl_bc_1.9x2.5_clim_RCP85_2050.nc'    I am confused why the simulated temperature change (2050-2000) is so small, Could someone give me a suggestion, Thanks !

 
T

tilmes

Member
it looks like you are replacing the SST file with a file that simulates future SSTs in 2050. However, this file has been produced from a different model version, and if that model version has an offset in surface temperatures compared to the one you are using for 2000, you may not get the right change in temperature. I would suggest using a year 2006 SST file from th same file for your present day simulation and see if you get the desired temperature change. But first you may check the 2 SST files you are using and see how different the temperatures are. Simone
 
T

tilmes

Member
it looks like you are replacing the SST file with a file that simulates future SSTs in 2050. However, this file has been produced from a different model version, and if that model version has an offset in surface temperatures compared to the one you are using for 2000, you may not get the right change in temperature. I would suggest using a year 2006 SST file from th same file for your present day simulation and see if you get the desired temperature change. But first you may check the 2 SST files you are using and see how different the temperatures are. Simone
 
T

tilmes

Member
it looks like you are replacing the SST file with a file that simulates future SSTs in 2050. However, this file has been produced from a different model version, and if that model version has an offset in surface temperatures compared to the one you are using for 2000, you may not get the right change in temperature. I would suggest using a year 2006 SST file from th same file for your present day simulation and see if you get the desired temperature change. But first you may check the 2 SST files you are using and see how different the temperatures are. Simone
 
T

tilmes

Member
it looks like you are replacing the SST file with a file that simulates future SSTs in 2050. However, this file has been produced from a different model version, and if that model version has an offset in surface temperatures compared to the one you are using for 2000, you may not get the right change in temperature. I would suggest using a year 2006 SST file from th same file for your present day simulation and see if you get the desired temperature change. But first you may check the 2 SST files you are using and see how different the temperatures are. Simone
 
T

tilmes

Member
it looks like you are replacing the SST file with a file that simulates future SSTs in 2050. However, this file has been produced from a different model version, and if that model version has an offset in surface temperatures compared to the one you are using for 2000, you may not get the right change in temperature. I would suggest using a year 2006 SST file from th same file for your present day simulation and see if you get the desired temperature change. But first you may check the 2 SST files you are using and see how different the temperatures are. Simone
 
T

tilmes

Member
it looks like you are replacing the SST file with a file that simulates future SSTs in 2050. However, this file has been produced from a different model version, and if that model version has an offset in surface temperatures compared to the one you are using for 2000, you may not get the right change in temperature. I would suggest using a year 2006 SST file from th same file for your present day simulation and see if you get the desired temperature change. But first you may check the 2 SST files you are using and see how different the temperatures are. Simone
 
T

tilmes

Member
it looks like you are replacing the SST file with a file that simulates future SSTs in 2050. However, this file has been produced from a different model version, and if that model version has an offset in surface temperatures compared to the one you are using for 2000, you may not get the right change in temperature. I would suggest using a year 2006 SST file from th same file for your present day simulation and see if you get the desired temperature change. But first you may check the 2 SST files you are using and see how different the temperatures are. Simone
 
T

tilmes

Member
it looks like you are replacing the SST file with a file that simulates future SSTs in 2050. However, this file has been produced from a different model version, and if that model version has an offset in surface temperatures compared to the one you are using for 2000, you may not get the right change in temperature. I would suggest using a year 2006 SST file from th same file for your present day simulation and see if you get the desired temperature change. But first you may check the 2 SST files you are using and see how different the temperatures are. Simone
 
L

liurj04@gmail_com

Member
Hello, SimoneThanks for your suggestion. I checked the 2 SST files used in my simulations. The global mean SST difference is about 1.3K, This is similar to the difference between year 2006 and 2050 in CMIP5 RCP85 simulation. I uploaded the figure of SST difference in attachment.  The SST difference looks OK, I thought maybe the SST file is not the reason for the small surface temperature change in my simulation, Am I right? I am also running another simulation using 2006 SST file  from the same file for the present day simulation and waiting to see the result. I searched the prescribed SST simulation in this forums. Some replies said the SSTICE_DATA_FILENAME variable in env_run.xml should be changed to my new SST file. I didn't change this variable in my simulation, Will this affect my simulation ?The experiment I want to run is same as the future climate simulation in  Martin'paper (Martin et al., 2015,ACP, How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks). I saw you are co-author of this paper. Do you know what kind of SST data is used in this paper ? Thanks !Best Regards 
 
L

liurj04@gmail_com

Member
Hello, SimoneThanks for your suggestion. I checked the 2 SST files used in my simulations. The global mean SST difference is about 1.3K, This is similar to the difference between year 2006 and 2050 in CMIP5 RCP85 simulation. I uploaded the figure of SST difference in attachment.  The SST difference looks OK, I thought maybe the SST file is not the reason for the small surface temperature change in my simulation, Am I right? I am also running another simulation using 2006 SST file  from the same file for the present day simulation and waiting to see the result. I searched the prescribed SST simulation in this forums. Some replies said the SSTICE_DATA_FILENAME variable in env_run.xml should be changed to my new SST file. I didn't change this variable in my simulation, Will this affect my simulation ?The experiment I want to run is same as the future climate simulation in  Martin'paper (Martin et al., 2015,ACP, How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks). I saw you are co-author of this paper. Do you know what kind of SST data is used in this paper ? Thanks !Best Regards 
 
L

liurj04@gmail_com

Member
Hello, SimoneThanks for your suggestion. I checked the 2 SST files used in my simulations. The global mean SST difference is about 1.3K, This is similar to the difference between year 2006 and 2050 in CMIP5 RCP85 simulation. I uploaded the figure of SST difference in attachment.  The SST difference looks OK, I thought maybe the SST file is not the reason for the small surface temperature change in my simulation, Am I right? I am also running another simulation using 2006 SST file  from the same file for the present day simulation and waiting to see the result. I searched the prescribed SST simulation in this forums. Some replies said the SSTICE_DATA_FILENAME variable in env_run.xml should be changed to my new SST file. I didn't change this variable in my simulation, Will this affect my simulation ?The experiment I want to run is same as the future climate simulation in  Martin'paper (Martin et al., 2015,ACP, How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks). I saw you are co-author of this paper. Do you know what kind of SST data is used in this paper ? Thanks !Best Regards 
 
L

liurj04@gmail_com

Member
Hello, SimoneThanks for your suggestion. I checked the 2 SST files used in my simulations. The global mean SST difference is about 1.3K, This is similar to the difference between year 2006 and 2050 in CMIP5 RCP85 simulation. I uploaded the figure of SST difference in attachment.  The SST difference looks OK, I thought maybe the SST file is not the reason for the small surface temperature change in my simulation, Am I right? I am also running another simulation using 2006 SST file  from the same file for the present day simulation and waiting to see the result. I searched the prescribed SST simulation in this forums. Some replies said the SSTICE_DATA_FILENAME variable in env_run.xml should be changed to my new SST file. I didn't change this variable in my simulation, Will this affect my simulation ?The experiment I want to run is same as the future climate simulation in  Martin'paper (Martin et al., 2015,ACP, How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks). I saw you are co-author of this paper. Do you know what kind of SST data is used in this paper ? Thanks !Best Regards 
 
L

liurj04@gmail_com

Member
Hello, SimoneThanks for your suggestion. I checked the 2 SST files used in my simulations. The global mean SST difference is about 1.3K, This is similar to the difference between year 2006 and 2050 in CMIP5 RCP85 simulation. I uploaded the figure of SST difference in attachment.  The SST difference looks OK, I thought maybe the SST file is not the reason for the small surface temperature change in my simulation, Am I right? I am also running another simulation using 2006 SST file  from the same file for the present day simulation and waiting to see the result. I searched the prescribed SST simulation in this forums. Some replies said the SSTICE_DATA_FILENAME variable in env_run.xml should be changed to my new SST file. I didn't change this variable in my simulation, Will this affect my simulation ?The experiment I want to run is same as the future climate simulation in  Martin'paper (Martin et al., 2015,ACP, How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks). I saw you are co-author of this paper. Do you know what kind of SST data is used in this paper ? Thanks !Best Regards 
 
L

liurj04@gmail_com

Member
Hello, SimoneThanks for your suggestion. I checked the 2 SST files used in my simulations. The global mean SST difference is about 1.3K, This is similar to the difference between year 2006 and 2050 in CMIP5 RCP85 simulation. I uploaded the figure of SST difference in attachment.  The SST difference looks OK, I thought maybe the SST file is not the reason for the small surface temperature change in my simulation, Am I right? I am also running another simulation using 2006 SST file  from the same file for the present day simulation and waiting to see the result. I searched the prescribed SST simulation in this forums. Some replies said the SSTICE_DATA_FILENAME variable in env_run.xml should be changed to my new SST file. I didn't change this variable in my simulation, Will this affect my simulation ?The experiment I want to run is same as the future climate simulation in  Martin'paper (Martin et al., 2015,ACP, How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks). I saw you are co-author of this paper. Do you know what kind of SST data is used in this paper ? Thanks !Best Regards 
 
L

liurj04@gmail_com

Member
Hello, SimoneThanks for your suggestion. I checked the 2 SST files used in my simulations. The global mean SST difference is about 1.3K, This is similar to the difference between year 2006 and 2050 in CMIP5 RCP85 simulation. I uploaded the figure of SST difference in attachment.  The SST difference looks OK, I thought maybe the SST file is not the reason for the small surface temperature change in my simulation, Am I right? I am also running another simulation using 2006 SST file  from the same file for the present day simulation and waiting to see the result. I searched the prescribed SST simulation in this forums. Some replies said the SSTICE_DATA_FILENAME variable in env_run.xml should be changed to my new SST file. I didn't change this variable in my simulation, Will this affect my simulation ?The experiment I want to run is same as the future climate simulation in  Martin'paper (Martin et al., 2015,ACP, How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks). I saw you are co-author of this paper. Do you know what kind of SST data is used in this paper ? Thanks !Best Regards 
 
L

liurj04@gmail_com

Member
Hello, SimoneThanks for your suggestion. I checked the 2 SST files used in my simulations. The global mean SST difference is about 1.3K, This is similar to the difference between year 2006 and 2050 in CMIP5 RCP85 simulation. I uploaded the figure of SST difference in attachment.  The SST difference looks OK, I thought maybe the SST file is not the reason for the small surface temperature change in my simulation, Am I right? I am also running another simulation using 2006 SST file  from the same file for the present day simulation and waiting to see the result. I searched the prescribed SST simulation in this forums. Some replies said the SSTICE_DATA_FILENAME variable in env_run.xml should be changed to my new SST file. I didn't change this variable in my simulation, Will this affect my simulation ?The experiment I want to run is same as the future climate simulation in  Martin'paper (Martin et al., 2015,ACP, How emissions, climate, and land use change will impact mid-century air quality over the United States: a focus on effects at national parks). I saw you are co-author of this paper. Do you know what kind of SST data is used in this paper ? Thanks !Best Regards 
 
K

kongy15@lzu_edu_cn

New Member
liurj      I'm running future climate simulation with CLM4.5. The compset is IRCP26CLM45CN. And the atmosphere forcing data is from Qian(1972-2004). So I don't understand the meaning of output results.  Does it means the future simulation result from 2006 to 2100?        Hope your reply! You can also contact me with E-mail in Chinese: kongy15@lzu.edu.cn.kongying

 
K

kongy15@lzu_edu_cn

New Member
liurj      I'm running future climate simulation with CLM4.5. The compset is IRCP26CLM45CN. And the atmosphere forcing data is from Qian(1972-2004). So I don't understand the meaning of output results.  Does it means the future simulation result from 2006 to 2100?        Hope your reply! You can also contact me with E-mail in Chinese: kongy15@lzu.edu.cn.kongying

 
K

kongy15@lzu_edu_cn

New Member
liurj      I'm running future climate simulation with CLM4.5. The compset is IRCP26CLM45CN. And the atmosphere forcing data is from Qian(1972-2004). So I don't understand the meaning of output results.  Does it means the future simulation result from 2006 to 2100?        Hope your reply! You can also contact me with E-mail in Chinese: kongy15@lzu.edu.cn.kongying

 
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