Dave, Will and Shawn,
thanks to all for your guidance,
I found where is the problem. Thank you very much.
________________________________
From: Wen.J.Qu <wen.j.qu_at_gmail.com>
To: marziyeh dadizadeh <marzi_d65_at_yahoo.com>
Cc: ncl-talk <ncl-talk_at_ucar.edu>
Sent: Tuesday, November 13, 2012 9:03 AM
Subject: Re: how can I use actual-range???
Hi, marziyeh
I met this problem before. Dennis has answered it in detail. I would like to forward the
email below. Good luck!
Shawn
________________________________
Wen.J.Qu2012-11-12
________________________________
发件人： marziyeh
dadizadeh
发送时间： 2012-11-12 21:28:53
收件人： NCL
抄送：
主题： [ncl-talk] how can I
use actual-range???
Dear NCL Users,
I
want to make a plot of NCEP data.
In
all header parameter, there are 2 different attributions, "actual_range" and "valid_range".
When
I use Grads software to plot my data, it seems
"actual_range" are in use, that it is true. But when
the same data are in NCL and I make a plot, I see
"valid_range" in graphics output, that it is not
true!
There
is a sample plot in attach. I got it by NCL, Please see it.
In
both of them, Grads and NCL, I used simple script without any special order but
results were different.
How
can I plot actual-rang in NCL just like Grads??
Can
anyone help me please??
Thank
you very much,
Marzie
---------------------------------------------------------------------------
This
is header of my file:
---------------------------------------------------------------------------
filename:
temp-lev850-Apr-1to31
path: temp-lev850-Apr-1to31.nc
file global
attributes:
Conventions :
COARDS
title : 4x daily NMC reanalysis
(2005)
history : Wed Nov 7 13:13:51
2012: ncks -O -d level,850.000000 -d lat,-90.000000,90.000000 -d
lon,0.000000,357.500000 -d time,90,120
/Datasets/ncep.reanalysis.dailyavgs/pressure/air.2005.nc
/Public/www/X94.183.222.27.311.13.13.50.nc
created 2005/01/03 by Hoop
(netCDF2.3)
description : Data is from NMC
initialized reanalysis
(4x/day). It consists of most variables
interpolated to
pressure surfaces from model (sigma)
surfaces.
platform :
Model
references :
http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html
dimensions:
time = 31 //
unlimited
level =
1
lat = 73
lon = 144
variables:
short air
( time, level, lat, lon )
long_name : mean Daily Air
temperature
unpacked_valid_range : ( 150, 350
)
actual_range
: ( 214.88, 305.37
)
units :
degK
add_offset
: 477.66
scale_factor :
0.01
missing_value
: 32766
precision :
2
least_significant_digit
: 1
GRIB_id :
11
GRIB_name
: TMP
var_desc : Air
temperature
dataset
: NCEP Reanalysis Daily
Averages
level_desc
: Multiple
levels
statistic
: Mean
parent_stat : Individual
Obs
valid_range
: ( -32766, -12766
)
_FillValue
: 32766
float lat ( lat
)
units :
degrees_north
actual_range
: ( 90, -90
)
long_name
: Latitude
standard_name :
latitude
axis
: Y
float level ( level
)
units :
millibar
actual_range
: ( 850, 850
)
long_name
: Level
positive :
down
GRIB_id
: 100
GRIB_name :
hPa
axis :
Z
float lon ( lon
)
units :
degrees_east
long_name
:
Longitude
actual_range
: ( 0, 357.5
)
standard_name
:
longitude
axis
: X
double time ( time
)
units :
hours since 1-1-1 00:00:0.0
long_name :
Time
actual_range
: ( 17568912, 17569632
)
delta_t
: 0000-00-01
00:00:00
avg_period
: 0000-00-01
00:00:00
standard_name
: time
axis : T
_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Tue Nov 13 10:42:30 2012
This archive was generated by hypermail 2.1.8 : Tue Nov 13 2012 - 14:27:24 MST