這半年忙著畢業(yè)寫論文，好久好久好久不更新了∠( °ω°)／ ，今天準(zhǔn)備開個(gè)新坑 ?乛?乛?，學(xué)習(xí)一下CESM（Community Earth System Model），它是一個(gè)完全耦合的全球氣候模型，可用于地球過去、現(xiàn)在和未來氣候狀態(tài)的模擬。

1 安裝CESM2依賴的庫

首先安裝一些依賴的庫，具體參考官網(wǎng)：
Introduction (CESM2.2)

這里其實(shí)和我之前寫的教程WRF/CMAQ 安裝教程有很多重復(fù)的部分，就不過多贅述了，另外lapack和blas的安裝可以參考：lapack和blas安裝教程；Cmake的安裝可以參考：Linux安裝CMake；ESMF的安裝可以參考：CESM2移植全攻略

💡 注意：
1.NetCDF必須使用與CESM相同的Fortran編譯器構(gòu)建（我都用的intel）。
2.Parallel-netCDF（pnetcdf）是可選的。如果使用pnetcdf，則應(yīng)該使用1.7.0或更高版本。它是一個(gè)文件格式與netCDF兼容的庫，并通過MPI-IO提供更高的性能。pnetcddf通過設(shè)置Makefile中的$PNETCDF_PATH變量來啟用。

2 CESM2代碼下載

接下來就是下載CESM2的代碼了，

{navigate to your home or work directory}
git clone https://github.com/ESCOMP/CESM.git src_cesm2_3_beta08

cd src_cesm2_3_beta08

git tag --list '*beta08*'  #to see options of tags

git checkout cesm2_3_beta08

./manage_externals/checkout_externals

前面都好好的，到這里就下載不動(dòng)了ㄟ( ▔, ▔ )ㄏ ，看了一下官網(wǎng)的說明Downloading CESM2 (CESM2.2):

Access to the code requires both git and Subversion client software in
place that is compatible with GitHub and our Subversion server
software. You will need access to the command line clients, git (v1.8
or greater) and svn (v1.8 or greater but less than v1.11). Currently,
our Subversion server software is at version 1.8.17. For more
information or to download open source tools, visit Subversion and git
downloads.

原來需要git(v1.8或更高版本)和svn(v1.8或更高版本，但低于v1.11)。
查了一下git的版本符合要求（git --version），但是svn版本有點(diǎn)低（svn --version），于是更新了一下，參考了【Linux】centos7.x 升級(jí)svn版本到指定版本
（P.S. 因?yàn)楫厴I(yè)了，暫時(shí)莫得服務(wù)器用(；′д｀)ゞ，所以這里用的是我之前的CentOS7虛擬機(jī)）
更新完了再重新：

./manage_externals/checkout_externals

結(jié)果：

ERROR: In directory/home/pc/src_cesm2_3_beta08/components 
Process did not run successfully; returned status 128:git clone --quiet https://github.com/ESCOMP/ctsm/ clm 
See above for output from failed command.

em…沖個(gè)浪找到：
安裝CESM記錄里面有：

git config --global http.sslverify “false”
git config --global url.“https://”.insteadOf git://

再試一下

./manage_externals/checkout_externals

又有報(bào)錯(cuò)(╬￣皿￣)：

ERROR: Failed with output:fatal: bad config value for 'http.sslverify' in /home/pc/.gitconfig

繼續(xù)沖浪找到fatal bad boolean config value ‘false；‘ for ‘http.sslverify‘解決問題(～￣▽￣)～ ：

[pc@localhost src_cesm2_3_beta08]$ ./manage_externals/checkout_externals
Processing externals description file : Externals.cfg
Checking status of externals: ccs_config, cam, cice, cice6, cmeps, cdeps, cpl7, share, mct, parallelio, cime, cism, clm, fms, mom, mosart, pop, rtm, ww3, ww3dev, 
Checking out externals: ccs_config, cime, cam, Processing externals description file : Externals_CAM.cfg
Checking out externals: chem_proc, atmos_phys, atmos_cubed_sphere, mpas, carma, clubb, cosp2, pumas, pumas-frozen, silhs, 
cdeps, Processing externals description file : Externals_CDEPS.cfg
Checking out externals: fox, genf90, 
cice, cice6, Processing externals description file : Externals.cfg
Checking out externals: cice, 
cism, Processing externals description file : Externals_CISM.cfg
Checking out externals: source_cism, 
clm, Processing externals description file : Externals_CLM.cfg
Checking out externals: fates, 
cmeps, cpl7, mosart, pop, Processing externals description file : Externals_POP.cfg
Checking out externals: cvmix, marbl, 
rtm, ww3, mct, parallelio, share, 

[pc@localhost src_cesm2_3_beta08]$ ls
ccs_config          cime_config         doc            manage_externals
ChangeLog           CODE_OF_CONDUCT.md  Externals.cfg  README.rst
ChangeLog_template  components          libraries      share
cime                describe_version    LICENSE.txt

成功后可以用以下命令檢查組件的情況：

[pc@localhost src_cesm2_3_beta08]$ ./manage_externals/checkout_externals -S
Processing externals description file : Externals.cfg
Processing externals description file : Externals_CAM.cfg
Processing externals description file : Externals.cfg
Processing externals description file : .gitmodules
Processing submodules description file : .gitmodules
Processing externals description file : Externals_CDEPS.cfg
Processing externals description file : Externals_CISM.cfg
Processing externals description file : Externals_CLM.cfg
Processing externals description file : Externals_POP.cfg
Checking status of externals: ccs_config, cam, chem_proc, carma, cosp2, clubb, silhs, pumas, pumas-frozen, atmos_phys, atmos_cubed_sphere, mpas, cice, cice6, cice, icepack, cmeps, cdeps, fox, genf90, cpl7, share, mct, parallelio, cime, cism, source_cism, clm, fates, fms, mom, mosart, pop, cvmix, marbl, rtm, ww3, ww3dev, ./ccs_config./cime./components/cam./components/cam/chem_proc./components/cam/src/atmos_phys./components/cam/src/dynamics/fv3/atmos_cubed_sphere./components/cam/src/dynamics/mpas/dycore./components/cam/src/physics/carma/base./components/cam/src/physics/clubb./components/cam/src/physics/cosp2/src./components/cam/src/physics/pumas./components/cam/src/physics/pumas-frozen./components/cam/src/physics/silhs./components/cdeps./components/cdeps/fox./components/cdeps/share/genf90./components/cice./components/cice6./components/cice6/src./components/cice6/src/icepack./components/cism./components/cism/source_cism./components/clm./components/clm/src/fates./components/cmeps./components/cpl7
e-o ./components/mom./components/mosart./components/pop./components/pop/externals/CVMix./components/pop/externals/MARBL./components/rtm./components/ww3
e-o ./components/ww3dev
e-o ./libraries/FMS./libraries/mct./libraries/parallelio./share
[pc@localhost src_cesm2_3_beta08]$

終于下載下來好啦ヾ(ｏ･ω･)ﾉ