tag:blogger.com,1999:blog-7729093380675162051.post2253158349081106339..comments2024-03-28T13:56:47.604+11:00Comments on moyhu: A temperature data collection for comparisonsNick Stokeshttp://www.blogger.com/profile/06377413236983002873noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-7729093380675162051.post-21554651500188205572010-06-15T19:26:28.865+10:002010-06-15T19:26:28.865+10:00Thanks for the advice, Deep. These files are a by-...Thanks for the advice, Deep. These files are a by-product of an effort I was making to estimate the variability of model results, to check on comparison with measured indices. I didn't get far with that, because I ran into an odd effect. Many of the runs have a period of great variation, typically around 2050. A typical plot is <a href="http://i50.tinypic.com/15hfqbt.jpg" rel="nofollow">here</a>. Do you have any ideas about that?<br /><br />I have added a full collection of plots of the monthly model data from the table <a href="http://drop.io/erfitad" rel="nofollow">modeltable.zip</a>.Nick Stokeshttps://www.blogger.com/profile/06377413236983002873noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-25825139029471401832010-06-15T04:44:47.404+10:002010-06-15T04:44:47.404+10:00Nick,
I think it would be a good idea to look at ...Nick,<br /><br />I think it would be a good idea to look at 20CEN model runs.<br /><br />The correct way to analyze the A1B runs relative to 20th century is to first "splice" them onto the corresponding 20CEN runs. This was probably done in most cases. <br /><br />But in some cases (three models and 7 runs in all), there is no 20CEN portion, as seen below (this is from coldatafn, a merge of coldata and filenames).<br /><br />* 19 14 1813 3013 giss_aom <br />* 20 14 1813 3012 <br /><br />* 29 17 1801 4201 iap_fgoals1_0_g<br />* 30 17 1801 4201<br />* 31 17 1801 4200<br /><br /> 58 27 481 2999 ncar_pcm1<br /> 59 27 481 5401<br />* 60 27 1801 4201 <br />* 61 27 1801 3000<br /><br />The starred runs (*) don't have pre-2000 data. However, some of these may have the corresponding 20CEN data only in the 20CEN run data files, and have not repeated it here. If any of these runs do not have corresponding 20CEN runs for some reason, then they can't be used for certain kinds of analysis.<br /><br />It's also possible that some of the other runs do not have the corresponding 20CEN data (i.e. the pre-2000 data is in error or is actually "something else"), although I imagine that should be a rare problem.<br /><br />Feel free to get in touch if you wish to discuss further.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-6858363018039333912010-06-14T06:21:12.630+10:002010-06-14T06:21:12.630+10:00Kelly,
I think that is a very good idea, and CSV w...Kelly,<br />I think that is a very good idea, and CSV would be very suited to Excel users, and also works for R. You might like to add the Model E forcing data. <a href="http://tamino.wordpress.com/climate-data-links/" rel="nofollow">Tamino</a> and <a href="http://rankexploits.com/musings/2009/climate-links-headings/" rel="nofollow">Lucia</a> have collections of links which might give other ideas.Nick Stokeshttps://www.blogger.com/profile/06377413236983002873noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-86872456713278543662010-06-13T23:39:21.093+10:002010-06-13T23:39:21.093+10:00Nick & Deep
I'm thinking about adding sev...Nick & Deep<br /><br />I'm thinking about adding several additional series to the 5 temp anomaly series, including:<br /><br /> o CO2 - Mauna Loa<br /> o SOI<br /> o PDO<br /> o AMO<br /> o Nino34 <br /> o SATO <br /> o SST (Hadley)<br /><br />My idea is to give users a single file that they can download as CSV and use Excel, R or whatever to analyze and plot the data as they see fit. <br /><br />Getting the data in a usable format takes time, this consolidated file would save users a lot of data manipulation time and effort.<br /><br />My approach is to download all source files each month so that I capture any edits that may have been made in individual data series. <br /> <br />I have the R scripts for the pieces. Any thoughts before I start combining the series?Kelly O'Dayhttp://chartsgraphs.wordpress.comnoreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-62824525212765601382010-06-13T20:48:42.950+10:002010-06-13T20:48:42.950+10:00Deep,
I agree that I probably won't keep the i...Deep,<br />I agree that I probably won't keep the indices updated. I put everything in one table because in R at least, you can then read them into a big structure and experiment with comparisons.<br /><br />I agree annual is a good idea, and I've put up a new zip file. annualtable.txt has the same column structure as modeltable.txt, but with annual averages (calendar year). The file annualends.txt has the same structure as coldata.txt, but points to the start and end rows in annualtable.txt, for each column.Nick Stokeshttps://www.blogger.com/profile/06377413236983002873noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-60505691916691161222010-06-13T14:38:53.528+10:002010-06-13T14:38:53.528+10:00I have other items on a wish list (e.g. annual ser...I have other items on a wish list (e.g. annual series).<br /><br />But mostly I just want to say - thanks so much for doing this!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-2490631206121645492010-06-13T14:33:17.321+10:002010-06-13T14:33:17.321+10:00It would make sense to separate the models from th...It would make sense to separate the models from the obs, since the former won't change. And Kelly has them anyway.<br /><br />Useful metadata would be the baseline used for each data set's anomaly calculation. I know them for the observation, but I have no idea how the models are done.<br /><br />For some kinds of analyses you want a common baseline across all data sets. 1980-99 is a commonly used one for the models (last twenty years of 20CEN). <br /><br />Of course that doesn't matter for trends.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-31562822068993686012010-06-08T07:02:47.131+10:002010-06-08T07:02:47.131+10:00Thanks, Kelly,
I'd been thinking about an upda...Thanks, Kelly,<br />I'd been thinking about an update mechanism, but it probably makes sense to just use yours.Nick Stokeshttps://www.blogger.com/profile/06377413236983002873noreply@blogger.comtag:blogger.com,1999:blog-7729093380675162051.post-836895257151257652010-06-08T05:42:36.194+10:002010-06-08T05:42:36.194+10:00Nick
I also have a collection of the 5 major glob...Nick<br /><br />I also have a collection of the 5 major global temperature series. I update it monthly, its available at this <a href="http://processtrends.com/Files/RClimate_consol_temp_anom_latest.csv" rel="nofollow"> link</a> as a csv file.<br /><br />Kelly O'DayD Kelly O'Dayhttp://chartsgraphs.wordpress.comnoreply@blogger.com