GDAS Archive at University of Alaska

Post links to publicly available repositories of HYSPLIT formatted meteorological data. Include links to documentation describing the data coverage area, time period, and variables within the data set.
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glenn.rolph
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GDAS Archive at University of Alaska

Post by glenn.rolph » November 13th, 2012, 10:43 am

The GDAS archive data for HYSPLIT is also being archived at the University of Alaska Fairbanks. The URL is:

ftp://gdas-server.iarc.uaf.edu/gdas1/

gracy.hm
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Re: GDAS Archive at University of Alaska

Post by gracy.hm » November 20th, 2014, 1:05 am

Hello,
Can someone help me about
1) The detail data discription of each parameter how it is calculated in GDAS data set. The U and V winds are in m/s but the W wind is given in terms of the pressure and its unit is "hPa/s" can anyone suggest how to convert the wind unit from hpa/s to m/s

2) Can anyone help me how to read the GDAS 0.5 degree dataset and write it in the form of ASCII dataset

I'll be very thankful to you.

ariel.stein
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Re: GDAS Archive at University of Alaska

Post by ariel.stein » November 25th, 2014, 1:37 pm

1) Here you can find several links that explain in detail how the parameters are calculated in GDAS.
http://www.ready.noaa.gov/gdas1.php
http://www.emc.ncep.noaa.gov/gmb/gdas/
http://www.emc.ncep.noaa.gov/GFS/doc.php
To convert from hPa/s to m/s you will need to divide the w by the density times g (gravity).

2) If you have the GUI installed in your PC you can click on Meteorology/Display Data/ text profile/
to see the data in ascii. Other visualization tools are available under the same menu.

However, you will not be able to convert the whole grid to ascii.

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