20th century reanalysis · 20th century reanalysis plotting and analysis tools catherine smith,...
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20th Century Reanalysis Plotting and Analysis
ToolsCatherine Smith, Gary T. Bates, Gilbert P. Compo, Don
Hooper and Jeffrey S. WhitakerNOAA/ESRL PSD and CIRES CDC at CU
Details of 20CR Data Stored at NOAA/ESRL PSD
Info:http://www.esrl.noaa.gov/psd/data/20thC_Rean/
Links to dataset doc, news, web apps, publications…
1871-2008 currently; plans to extend to 2010.
Total Size: 4.4Tbytes.
Includes pressure level(24) and monolevel files (2x2) and monolevel gaussian gridded (192x94) files of ensemble mean and uncertainty.
4/8 times daily, daily average, monthly average.
Climatologies: 1968-1996 and 1981-2008: monthly, daily, 4-8X daily.
All files in netCDF3 format, packed into short integer.
CF/COARDS complaint.
Access Methods for DataAnonymous ftp at ftp.cdc.noaa.gov
openDAP at file prefixhttp://www.esrl.noaa.gov/psd/thredds/catalog/Datasets/20thC_ReanV2/
THREDDS Cataloghttp://www.esrl.noaa.gov/psd/thredds/catalog/Datasets/20thC_ReanV2/catalog.html
Webpages: See http://www.esrl.noaa.gov/psd/data/20thC_Rean/ for links
Basic Search/Plot and Data Subsets
Search for data at http://www.esrl.noaa.gov/psd/cgi-bin/db_search/SearchMenus.pl
Do simple plots or extract subsets. Finds all variables and statistics.
Sub-daily Compositeshttp://www.esrl.noaa.gov/psd/data/composites/subdaily_20thC/
Plot averages of variables over specified dates
Interface similar for other composite pages
Select date(s)
Select variables/level
Select mean, anomaly, LTM
Select map region and plotting options
Sub Daily Composite Page
http://www.esrl.noaa.gov/psd/data/composites/subdaily_20thC/
Composite Plot
http://www.esrl.noaa.gov/psd/data/composites/subdaily_20thC/
Monthly Compositeshttp://www.esrl.noaa.gov/cgi-bin/data/composites/plot20thc.v2.pl
Similar to sub-daily interface. Can also plot spreads (ensemble standard deviation).
Composite Based on Time Series: Niño 3.4 (“ENSO”)
http://www.esrl.noaa.gov/cgi-bin/data/composites/plot20thc.v2.pl
Google Earth OutputPlot the January Rotated NAO Pattern.
Choose SLP for Jan, all months >1.5 sigma of RNAO
Save KMZ/KML file or view in Google Earth Browser App
Extract Timeseries and Specified Dates
http://www.esrl.noaa.gov/psd/data/timeseries/
Extract dates matching criteria: e.g. Tmax/Amsterdam/Sep/20 hottest days 1979-2008.
http://www.esrl.noaa.gov/psd/data/timeseries/daily/Extract/Plot timeseries from monthly 1000mb Air Temperature for Sep for Amsterdam
Use Dates/Timeseries for Plots
2. FTP file of dates to PSDftp ftp.cdc.noaa.govcd /Public/incoming/datesput filename
Composite 1000mb Temperature Anomaly
Composite 850mb v-wind anomaly
3. Enter name of file into daily composite page. Select different variables/lags…
1. Save extracted file of dates from timeseries extraction page.
2020040906 19990910 20050909 20030906 20060916 19990909 19830901 20060912 20060922 20050906 20060915 19990912 19910902 20060914 19910903 20050905 20050908 20060913 19990911 20050901
Ensemble Spread Mapshttp://www.esrl.noaa.gov/psd/data/20thC_Rean/hem_images.html
Access means/spreads of SLP/z500 for any day.
SLP/z500 Means/Spread for Sep 29 1874: date of first hurricane to be shown on a weather map by the US Weather Bureau.
Download StatisticsSep 2010-Aug 2011
FTP Transfers:
141,329 transfer of 19.19 Tbytes
Web Transfers81K Total plots (mon,sub-hourly,daily composites)20K non-data/plot HTML pages (20thC_Rean, news, pubs,references…)
OPEnDAP Accesses3.6 million files accessed. Top variables: pressure level vars, CAPE, precip rate Tmax,tmin
Future Plans/PossibilitiesAdd Dataset to Monthly Correlation Webpages
Have ‘Google Earth’ format for all composite time scale webpages
Add more variables
Add spreads to plots of ensemble means on all composite pages
Plot vertical cross-sections
Add more time series features such as anomalies.
Please provide suggestions: [email protected], [email protected]