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Cyclone Impact
Terra2008/12205/01/0804:35 UTC
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Cyclone Impact - Conclusions
• The data sets are immediately laid out on the PO.DAAC site.
• Deciding on which data set to use requires reading the data guides (is this surprising?).
• Some links inactive.• The hurricane tracking section is comprehensive.• The Jason-1 data seems reasonably easy to locate and
decode. A lot of TLAs on the Jason-1 page.• No ocean color, or link, at PO.DAAC. However the gsfc
site is very easy to use.• No PO.DAAC search. Most searches on JPL page return
hits for “Cassini-Huygens”.
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Steps needed1. Overview – I would start with getting some tracking information and
maybe some observations. I know of operational sites that track hurricanes as well as the Modis rapid response site. Noaa might have a buoy or two in the Indian Ocean. That should do for starters.
2. Identify data sets – an overview of meteorological data from analyses would be good, although analyses are as a rule synoptic scale and not hurricane scale. I would expect to get met analyses from NCAR. The specific ocean products would then be (a.) sea level, (b.) wave heights, and (c.) ocean color. I can guess (a.) Jason, (b.) SAR, or a forecasting center, and (c.) seawifs?? I don’t know too much about ocean color. I’ll search for these at PO-DAAC and browse for others.
3. Results.
Strategy1. Start with data sources that I know about.2. Search away.
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Overview InformationThis is what I can typically find in a pinch.This is what I can typically find in a pinch.
• http://weather.unisys.com/hurricaneshttp://weather.unisys.com/hurricanes
• 6-hourly cyclone tracking information and max wind speed
• Max wind speed 115 mph on 6UTC, May 2.
• http://rapidfire.sci.gsfc.nasa.govhttp://rapidfire.sci.gsfc.nasa.gov
• Modis• ndbc.noaa.govndbc.noaa.gov
• Noaa National Data Buoy Center
Aqua 1km NDVI 05/05/08
Aqua 1km NDVI 04/27/08
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Identify data sets
• MeteorologyMeteorology – I would look for ECMWF operational analyses, if available (high resolution) from http://dss.ucar.edu/datasets. As of Sept 16, the first half of 2008 are in. This requires:• NCAR Mass-stor account
• Familiarity with unpacking software (NCL).
• NCEP reanalyses from NOAA Climate Analysis Branch - http://www.cdc.noaa.gov/ (for NCEP II, wait one year).
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• Jason-1 ocean elevation anomaly & significant wave height: http://podaac-www.jpl.nasa.gov
• After a while, I identified cycle 232, J1SSHA files available from ftp and there’s a reference manual. C/IDL for reading. On the web page, I stayed away from things I didn’t know. J1SSHA seems like what I want , but not sure… Stumbled across 10-day image archive..
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Hurricane Met data from PO.DAAC
Link to radar precip, Link to radar precip, flyover animations, etc.flyover animations, etc.After tedium with the After tedium with the
data download, I notice data download, I notice a link to cyclones and a link to cyclones and try it. Bingo…try it. Bingo…
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http://oceancolor.gsfc.nasa.gov/
Fruitless search for ocean color at Fruitless search for ocean color at PO.DAAC. I type “ocean color” into PO.DAAC. I type “ocean color” into Google and take the first hit. This is a Google and take the first hit. This is a friendly-looking web page. There’s a friendly-looking web page. There’s a hurricanes page with good imagery. The hurricanes page with good imagery. The interactive image searching page looks do-interactive image searching page looks do-able, and links to hdf files of the data are able, and links to hdf files of the data are given. This looks pretty good.given. This looks pretty good.
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Some Conclusions
• I did not expect to find met data, scatterometer winds, etc. at PO.DAAC. The hurricane tracking section is comprehensive.
• The Jason-1 data seems reasonably easy to locate and decode.
• I did expect to find ocean color, or a link, at PO.DAAC. However the gsfc site is very easy to use.
• Most searches on PO.DAAC page return hits for “Cassini-Huygens”.