THanks guys, Alex, great to see you! ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Chris Mattmann, Ph.D. Chief Architect Instrument Software and Science Data Systems Section (398) NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA Office: 168-519, Mailstop: 168-527 Email: [email protected] WWW: http://sunset.usc.edu/~mattmann/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Adjunct Associate Professor, Computer Science Department University of Southern California, Los Angeles, CA 90089 USA ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-----Original Message----- From: Alex Goodman <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Wednesday, June 4, 2014 3:53 PM To: "Boustani, Maziyar (398F)" <[email protected]> Cc: "Loikith, Paul C (329C-Affiliate)" <[email protected]>, "[email protected]" <[email protected]> Subject: Re: Model Observation Evaluation exmaple >Hi Mazi, > >I am in agreement with Paul. It is also clear from a quick inspection of >your plots that the model bias for each year is identical, so plotting >just >the 5-year average bias would give you sufficient information. You might >want to take a quick glance at IPCC AR5 WG I, Ch. 9 [1] for some good >examples. > >Thanks, >Alex > >[1] - >http://www.climatechange2013.org/images/report/WG1AR5_Chapter09_FINAL.pdf > > >On Wed, Jun 4, 2014 at 4:48 PM, Boustani, Maziyar (398F) < >[email protected]> wrote: > >> Here is the attached [1]. >> >> [1]: http://oi58.tinypic.com/w7yo2q.jpg >> >> ŠŠŠŠŠŠŠŠ >> Maziyar Boustani >> Software Engineer - GIS Developer >> Science Data Understanding Group >> Jet Propulsion Laboratory, California Institute of Technology >> 4800 Oak Grove Drive, >> Pasadena, CA, 91109 >> [email protected] >> >> On Jun 4, 2014, at 3:35 PM, Loikith, Paul C (329C-Affiliate) wrote: >> >> Hi Mazi, >> >> This should be one plot total. When you compute a bias, conventionally >> it's just one bias for the entire time period so there should be one >>plot. >> You could have multiple plots if you were computing the bias for all 4 >> seasons, but for annual there should only be one. >> >> When you say you temporally regridded to 365 days, what do you mean by >> this? The model and obs data are monthly, correct? So shouldn't you >>just >> be computing the mean difference between the obs and the model? >> >> Please let me know if you need further clarification. >> >> Thanks, >> >> Paul >> >> >> >> From: <Boustani>, "Maziyar (398F)" <[email protected]> >> Date: Wednesday, June 4, 2014 3:12 PM >> To: Paul Loikith <[email protected]>, "[email protected]" < >> [email protected]> >> Cc: "[email protected]" <[email protected]> >> Subject: Model Observation Evaluation exmaple >> >> Hi Paul and Alex, >> >> I ran a test code to evaluate one model [1] with one observation[2]. >>You >> can find the result as attached. >> This has been temporally regrided for 356 day, so we going to have 5 >>years >> of data and that is why we have 5 plots. >> Do you guys thinks this is correct to have one plot for each time or it >> should be one plot for entire time? >> >> Metric = Bias >> parameter_id = 38 >> dataset_id = 10 >> min_lat = 0 >> max_lat = 20 >> min_lon = 0 >> max_lon = 20 >> start_time = 2000-01-01 00:00:00 >> end_time = 2004-12-01 00:00:00 >> >> >> [1] : AFRICA_UQAM-CRCM5_CTL_ERAINT_MM_50km_1989-2008_tas.nc (variable = >> TAS) >> [2] : CRU3.1 Daily-Mean Temperature (parmeter_id = 38) >> >> <model_vs_obs_bias.png> >> >> ŠŠŠŠŠŠŠŠ >> Maziyar Boustani >> Software Engineer - GIS Developer >> Science Data Understanding Group >> Jet Propulsion Laboratory, California Institute of Technology >> 4800 Oak Grove Drive, >> Pasadena, CA, 91109 >> [email protected] >> >> <model_vs_obs_bias.png> >> >> >> > > >-- >Alex Goodman >Graduate Research Assistant >Department of Atmospheric Science >Colorado State University
