Thanks Steve and Ben for your forward.
We are now ingesting and have avbl the NARR. We have 1987 thru 2003
(of the 1979-2004) as requested below. NCAR and SDSC will also have
copies. Here at NCDC, Murphy got in the way as I usually have grib
sub-seting capabilities, however the RAID I expected
in for this operation has not yet arrived! I'm told the check is in
the mail. To get around this, the NOMADS team (all 2.5 of us) put
together direct access http to (m)get at the data due to this hardware
delay.
So, users may access the data as per Steve's url below. Use the http
link to get at the data directories. Depending on your internet
connection, it may be a slow process (maybe open 2 ports).
By next week (or so), please point users to the "ftp4u" capability that
can subset this large (5TB) dataset by parameter space and time (and by
variable). There is dataset documentation also avbl at the site.
As I write, we are developing a grib2nc capability for users to
retrieve in NetCDF format. We will also compress the NetCDF for
transmission (GFDL, Kerr) found that these NetCDF files compress very
well. Please let me know your experiences with this site and do try
to subset when that's avbl. Thanks, Glenn
Steve Worley wrote:
All,
North American Regional Reanalysis is just coming available from
two location I know of:
the NCDC NOMADS server (Glenn's work) at
http://nomads.ncdc.noaa.gov/data-access.html#narr_datasets
and NCAR through the Data Support Section.
We have 1987-2003 archived, but not fully ready for service. However,
if you wish to let us know what you require we might be able to
accomodate your needs without too much problem. Chi-Fan Shih
(address@hidden) can address your further questions about NARR
from NCAR.
sjw
Ben Domenico wrote:
Hi David, Jon and Dennis,
Your questions are flattering in terms of the assumed breadth and depth
of knowledge about data collections here at the Unidata Program Center
(UPC), but we should be honest and offer a few clarifications that will
help you find what you are looking for more quickly.
The main clarification is that the staff at the UPC mainly focuses on
infrastructure for real-time data systems for weather data. I
understand that archived climate information is closely related, but
your questions about the details of specific archived climate datasets
are skirting pretty much at and beyond the edges of our UPC expertise.
Those sorts of questions are better posed to the folk who create and
maintain the climate data archives at places like the NCDC, NCAR,
Lamont-Doherty, and CDC. I plan to send a copy of this note to Glenn
Rutledge at NCDC, Benno Blumenthal at LDEO, Steve Worley at NCAR, and
Don Hooper & Roland Schweitzer at CDC who should be able to help
you find what you need in terms of the North American Reanalysis
datasets -- in particular a netCDF version.
On the other hand, we do have experience at the UPC with decoders that
transform certain GRIB datasets into netCDF form (indeed with
considerably expanded size) and I'll ask Robb to follow up on that
issue to see if there is a version of that (GRIBTONC) decoder for the
North American Reanalysis data.
I don't mean to be passing the buck, but there are many groups who have
more detailed expertise than the UPC about archives of climate
datasets.
--Ben
******************************************************
Ben Domenico Unidata Deputy Director
http://my.unidata.ucar.edu P.O. Box 3000
address@hidden Boulder, CO 80307
(303)497-8631 FAX: (303)497-8690
--On Thursday, September 30, 2004 3:45 PM -0500 David Maidment
<address@hidden> wrote:
Robb:
Dennis Lettenmaier is correct here. What you are pointing us to is
the global NCEP reanalysis, which is on a 2.5 degree grid and not
very informative for the hydrology of the US. What we are seeking
to work with is the reanalysis for North America alone, which is
on a 32km grid and is in Grib format, not netCDF. The global
reanalysis is available in netCDF.
David
-----Original Message-----
From: Robb Kambic [mailto:address@hidden]
Sent: Thursday, September 30, 2004 11:25 AM
To: Ben Domenico
Cc: David Maidment; support-ldm
Subject: Re: NCEP North American Reanalysis (fwd)
look at url:
http://www.cdc.noaa.gov/cdc/data.ncep.reanalysis.html#surface_gauss
parameters water runoff, soil moisture, etc. these files are in
netcdf
so they should be usuable for your analysis. i downloaded a couple of
files and dumped them using ncdump.
there are proably other hydrologic fluxes data sets that can be found
by
searching the web.
robb...
On Thu, 30 Sep 2004, Ben Domenico wrote:
Hi all,
The note below from David Maidment asks about getting the NCAR
reanalysis products into netCDF form. Is there something special
about these datasets or would our grib to netcdf decoder work with
them. Regarding the grads part of it, I'm assuming that refers to the
fact that they are available via the GDS
protocol, but let me know if
there's more to it than that.
And how about the CDC archives? I thought they published these data
in netCDF form.
Thanks.
-- Ben
---------- Forwarded Message ----------
Date: Thursday, September 30, 2004 8:18 AM -0500
From: David Maidment <address@hidden>
To: Ben Domenico <address@hidden>
Subject: NCEP North American Reanalysis
Ben:
In CUAHSI HIS, we are thinking that a good "coverage" of hydrologic
fluxes from the atmosphere could be obtained from the NCEP North
American Reanalysis. More info is at
http://www.emc.ncep.noaa.gov/mmb/rreanl/
It seems like the data are all stored in one of your sister
institutions in Boulder.
Could you please help us to interpret what the data available are?
The data are in Grib/Grads format. We have invested a lot of effort
in
working
with netCDF and I don't want Jon Goodall or others in our CUAHSI
community
having to tussle with Grib/Grads. We
have another other data formats
already
with GIS, point observations and remote sensing to consider.
Would it be possible to translate these reanalysis data layers into
netCDF format?
David
---------- End Forwarded Message ----------
========================================================================
=======
Robb Kambic Unidata Program Center
Software Engineer III Univ. Corp for Atmospheric
Research
address@hidden WWW:
http://www.unidata.ucar.edu/
========================================================================
=======
|