[NARCCAP-discuss] Interpreting NARCCAP Data

Thu Mar 22 16:47:19 MDT 2012

Hi all,

We've added this paper to the Contributed Papers page on the website.  You can
download a PDF of the paper there:
 http://www.narccap.ucar.edu/contrib/papers.html

And a reminder: if you've written a publication using NARCCAP data, please
submit it for listing!  http://www.narccap.ucar.edu/cgi/submit-paper.pl

Cheers,

--Seth

On Mon, 12 Mar 2012 12:40:51 -0400
 "Sinha, Paramita" <psinha at rti.org> wrote:
>Hi Seth,
>
>The website lists the following paper to use as a reference but I am not being
>able to get a hold of it with a quick search. Is this something you may have
>an electronic copy of??
>
>Mearns, L. O., W. J. Gutowski, R. Jones, L.-Y. Leung, S. McGinnis, A. M. B.
>Nunes, and Y. Qian: A regional climate change assessment program for North
>America. EOS, Vol. 90, No. 36, 8 September 2009, pp. 311-312.
>
>
>Thanks a lot!
>
>Paramita
>
>
>
>
>-----Original Message-----
>From: narccap-discuss-bounces at mailman.ucar.edu
>[mailto:narccap-discuss-bounces at mailman.ucar.edu] On Behalf Of Seth McGinnis
>Sent: Thursday, February 23, 2012 1:38 PM
>To: Discussion of NARCCAP data - uses and questions
>Subject: Re: [NARCCAP-discuss] Interpreting NARCCAP Data
>
>Hi Sinha,
>
>(1) The variables in Table 1 are daily average values.
>Everything else is at 3-hourly frequency.  We are working on developing
>aggregations of the data (monthly and seasonal averages and climatologies),
>but they're not ready for publication yet.  However, you can find the NCL
>script that we use for the bulk of the data manipulation here:
>http://www.narccap.ucar.edu/contrib/tools/ncl/aggregate.ncl
>
>(2) The NCEP-driven runs cover 1980-2004.  For the GCM-driven runs, there are
>two runs for each GCM-RCM pairing.  The current run covers 1971-2000 and the
>future run covers 2041-2070.  See
>http://www.narccap.ucar.edu/about/time-periods.html for more details.
>
>(3) See above.
>
>(4) The variables in Table 1 are daily averages.  Table 2 has the 2-D surface
>variables of interest to impacts modelers: temp, precip, pressure, incoming
>solar radiation, and u- and v-winds.
>Table 3 has all the rest of the 2-D variables.  Table 4 has static (i.e., not
>time-varying) variables like elevation.  Table
>5 is 3-D data.
>
>(5) All variables are available for the entirety of the simulation period.
> There may be missing data in spots due to problems when data was saved or
>post-processed, but it's nothing systematic.  We have tabulated the timesteps
>where data is known to be missing here:
>http://www.narccap.ucar.edu/data/missing/
>
>Currently we have data available for temperature, precipitation, and snowfall.
> You can calculate relative humidity from specific humidity, temperature, and
>pressure (all of which are available), and we're working on developing those
>datasets, but they're not yet ready for publication.  Here's the script we'll
>use:
>http://www.narccap.ucar.edu/contrib/tools/ncl/calc_humid.ncl
>We don't have heating and cooling degree days, though we may do them at some
>point.
>
>(6) No.  We have nothing available in temperature bins.
>
>
>Extensive documentation of the data structure, organization, and availability
>can be found on the website: http://narccap.ucar.edu/ See particularly the
>"About Data" and "About NARCCAP" sections.
>
>Cheers,
>
>--Seth
>
>
>
>On Wed, 22 Feb 2012 11:47:19 -0500
> "Sinha, Paramita" <psinha at rti.org> wrote:
>>Hi,
>>
>>I am exploring the idea of using the NARCCAP RCM data to  project 
>>migration patterns of US households under climate scenarios. I am 
>>interested in using output from different GCM/RCM so that I can study 
>>sensitivity.  I need to know how to interpret the variable names 
>>correctly, so that I use the appropriate datasets. Some preliminary 
>>questions I have are as follows:
>>
>>(1)    What is the temporal structure (e.g. Is the data available at the
>>daily/monthly levels?)
>>
>>(2)    What time periods can we get projection data for (e.g. yearly
>>till 2100??)
>>
>>(3)    What do the terms current and future exactly mean? (e.g. the
>>HRM3-HadCM3 has two sets of tables)
>>
>>(4)    What is do these each of the tables represent?? (e.g. Table 2:
>>Primary 3-hourly surface fields (2-D))
>>
>>(5)    Are data on temperature, precipitation, heating degree days,
>>cooling degree days, snowfall, relative humidity  projections available 
>>for each month of the year? Which tables are relevant?
>>
>>(6)    Are data available in "temperature bins" ( e.g. number of days in
>>each 5 degree  temperature bins)? Which tables are relevant?
>>
>>Is there any detailed documentation/ references that I can look that to 
>>get a better understanding of the data? I appreciate any help you can 
>>give me!
>>
>>Thank you,
>>
>>Sincerely,
>>
>>Paramita
>>
>> 
>>
>>Paramita Sinha, PhD
>>
>>Senior Economist
>>Environmental, Technology, and Energy Economics Research Triangle 
>>Institute
>>701 13th Street, NW, Suite 750
>>
>>Washington, DC 20005-3967
>>
>>Phone:  (202)9747875
>>
>>Fax: (202)9747855
>>Email: psinha at rti.org <mailto:psinha at rti.org>
>>
>> 
>>
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