CMIP5数据下载

Accessing,Downloading,andViewingCMIP5DataDanielWalton,JoyceMeyerson,&J.DavidNeelin(Nov.2013)1.GettinganESGFAccount2.DownloadingtheCMIP5Data3.VisualizingNetCDFfiles1.
Ge@ng
an
ESGF
Account
• Works
best
with
Google
Chrome
or
Mozilla
FireFox
• Don’t
use
Safari
or
Internet
Explorer
• Click
Create
Account
pcmdi9.llnl.gov/esgf‐web‐fe/
1.
Ge@ng
an
ESGF
Account

• Fill
out
User
RegistraVon
2.
Login,
Search,
Download
• Locate
your
OpenID
idenVfier
in
the
confirmaVon
email.
• e.g.
hYps://pcmdi9.llnl.gov/esgf‐idp/openid/wal***
• Use
this
to
login
to
ESGF

2.
Login,
Search,
Download
• Enter
password
2.
Login,
Search,
Download
• Click
search
2.
Login,
Search,
Download
• Select
Project:
CMIP5
2.
Login,
Search,
Download
• Select
Experiment
Family
• Select

Experiment
RCP
(future)
‐RCP8.5
‐RCP6.0
‐RCP4.5
‐RCP2.6
Historical
2.
Login,
Search,
Download
• Select
Model
2.
Login,
Search,
Download
• Select
Time
Frequency
2.
Login,
Search,
Download
• Select
Variable
2.
Login,
Search,
Download
2D
Variable
Short
Names
2.
Login,
Search,
Download
3D
Variable
Short
Names
2.
Login,
Search,
Download
• Click
Add
To
Cart
• Then
select
Data
Cart
2.
Login,
Search,
Download
• Click
Show
Files
2.
Login,
Search,
Download
• Search
for
the
variable
short
name
that
you
are
looking
for.

– e.g.
“tas”
• Select
Filter
over
text
• Select
HTTP
to
download
directly.
tas
=
Surface
Air
Temperature
2.
Login,
Search,
Download
• AlternaVvely,
you
can
edit
WGET
scripts
to
automate
the
download
process.
• This
is
useful
if
you
want
to
download
the
data
to
a
remote
locaVon.
2.
Login,
Search,
Download
• Also,
you
can
use
Globus
Online
to
automate
the
download
process.
• Globus
Online
is
the
best
opVon
for
massive
data
transfers.

• It
automaVcally
restarts
downloads
if
there
is
a
problem
with
the
connecVon.


2.
Login,
Search,
Download
• Need
to
download
and
run
MyProxyLogin
• Establishes
proxy
access
to
ESGF.
2.
Login,
Search,
Download
***
• Need
to
download
and
run
MyProxyLogin
• Establishes
proxy
access
to
ESGF.
2.
Login,
Search,
Download
• Edit
wget
script
to
specify
only
the
variables
you
want.
• Run
script
with
bash.
3.
Visualizing
GCM
output
• NetCDF
files
contain
dimensions
and
variables
• Use
command
ncdump
–h
filename
display
the
metadata
Don’t
forget
the
“‐h”
3.
Visualizing
GCM
output
• ncview
filename
allows
you
to
plot
the
variables
forward
in
Cme
forward
in
Vme
(animaVon)
animaCon
speed
magnificaCon
Click
a
point
to
plot
Cme
series
3.
Visualizing
GCM
output
How
to
get
ncdump,
ncview:
1.
Unidata
soLware
page
hYp://
2.
MacPorts
(if
you
have
a
mac)
First,
get
MacPorts:

hYp://
Second,
use
MacPorts
to
get
ncview:
colby:DownloadsDaniel$colby:DownloadsDaniel$colby:DownloadsDaniel$portlist|grepncviewncview@2.1.1science/ncviewcolby:DownloadsDaniel$colby:DownloadsDaniel$colby:DownloadsDaniel$sudoportncview3.
Visualizing
GCM
output
How
to
view
netcdf
files
in
MATLAB:
1. Use
built‐in
netcdf
commands
(need
newer
version)
hYp://
ncreadnccreatencwrite2.

NCtoolbox
hYp://github.com/nctoolbox/nctoolbox
nc
=
ncdataset(‘example_file.nc’)
ncdata
nc.axes
nc.aYributes