FRIOWL Version 1.0 User's Guide 17 October 2003
Contents
1. FRIOWL Version 1 0 User s Guide 17 October 2003 The FRIOWL version 1 0 interface is available either on CD Rom or directly on the internet 1 Internet Access Click to either of the following sites http www unifr ch geoscience gis java EsoMainImage html http www ixvision de friowl java You will be presented with a login screen example shown below Enter the following username and password case sensitive Name esouser Password owl Address http www ixvision de Friawl javal esoimage EsoMainImage erscheint in einem Java fahigen Browser Name Password Login Login Please Start Then click on the start button and the FRIOWL interface should load If the interface does not load try entering the login name and password again If the webpage URLs listed above present you with a blank white or grey screen you probably need to upgrade to Java version 1 4 2 You can do this by either a installing Java from the CD Rom see below or b going to http java sun com and looking for the file j2re 1_4_2_01 windows i586 exe windows to download and install on your computer 2 CD Rom Access A copy of the CD Rom has been left with Marc Sarazin of ESO To view the interface simply click or run the esoimageW exe file windows esoimage linux linux esoimage mac Macintosh or esoimage solaris solaris You could alternatively copy all the files from the CD Rom to your hard dr2. act the following features in later versions a b c d e g h i Fix bugs Include a topographical layer Ability to overlay layers using weighting functions for each layer in order to create a new composite layer e g choose me a place which has less than one tenth of cloudiness is greater than 2500m altitude and has less than 5mm precipitable water content Change applet window size to be in accordance with user s resolution Include another frame which gives a definition of the chosen variable and its units when user clicks on a pixel Include a seismicity layer Have a Root Mean Square rms option made from daily data To save space possibly concentrate on 2000 5000m areas and ignore seas At a later stage add ability to zoom into 3 or 4 pre selected chosen areas which will have a new more detailed database Severe weather option windstorms lightning snow k Ability to save image as a GIF or JPEG 1 Ability for movies possibly m Marc doesn t want to have to click on 40 files at a time perhaps include an ability to multi select e g such as in Windows Explorer n Delete button option for user files o Get rid of SUM option p There is a little confusion as to when a file is saved Perhaps clear the text box afterwards q After loading we need to be able to look at the images individually therefore include a NEUTRAL NO OPERATION option or SINGLE IMAGE DISPLAY option r Password ch
3. ange option s Exit button option 10 Comments questions and discussion Further comments and questions can be placed on the FRIOWL Discussion platform specially created for the FRIOWL interface available on the web at http www dynabyte ch cgi bin yabb YaBB cgi This file is also available for reading there at http www unifr ch geoscience gis eddie FRIOWL_version_1 0 README doc Just use one of the following login usernames Name Password Sarazinm marc esouser owl Alternatively just send an email to edward graham unifr ch with your comments questions or suggestions Have fun playing Eddie Graham University of Fribourg Switzerland 17 October 2003
4. d Om correction this should read 0m not Omb direction These are the directional frequencies of winds for 8 different compass points North North east East South east South South west West and North west Each map shows the wind frequency for each direction in fractions 1 0 100 frequency 0 0 no frequency at all e g clicking on WEST for January 1979 shows the fraction of days with a westerly wind blowing at each pixel The ECMWF Reanalysis model at a grid resolution of 2 5 was used to calculate these maps e Wind Om speed These are the mean windspeeds for each wind direction based on the same 8 compass points North North east East South east South South west West and North west The ECMWF Reanalysis model g h i i k at a grid resolution of 2 5 was used to calculate these maps the units are ms Wind 200mb direction as Om above but for the 200mb level This level is often used as an indication of jetstream or tropopause level winds Wind 200mb speed as above Wind 850mb direction ditto as above Wind 850mb speed ditto Precipitable water vapour this is mean monthly precipitable water content in kg m or mm as derived from the NCEP NCAR Reanalysis model at a grid resolution of 2 5 Aerosol these are monthly means of aerosol index a NOAA unit 4 sun obscured by haze as calculated by the satellites Nimbus 7 and Total Ozone Mapping Spectrometer TOMS at a r
5. e the sign for Jan 1999 to a 6666 sign Note the large anomalies over the equatorial south Pacific and Indonesia indicative of a strong El Nino pattern 7 Notes on the format of folders on the CD Rom All data files are in single column ASCII format with the extension rst IDRISI raster file format They can be found on the CD Rom in the rst folder The reason for this format is because the original interface was based on IDRISI file specifications 8 Bugs to date 17 10 2003 a b c d e olr please note that the data on the CD Rom from April December 1978 is corrupt Air2m please note that the latitude longitude co ordinates are currently back to front so any analysis will be incorrect Wind Omb this is incorrectly labeled it should read Om i e surface level not Omb also the data is currently upside down x reversed All wind folders the data is currently upside down x reversed aerosol please note that the data is 180 out of longitude alignment so any analyses at this stage is incorrect also the interface crashes if you try to overlay aerosol maps with other variables due to the different file size resolutions Clicking on an operation while zooming doesn t work 9 Improvements foreseen in the future With each improvement of the FRIOWL interface we will update the version number As a result of the meeting with ESO scientists in Munich on 14 October 2003 we will try to en
6. escription Min Max Lh ecmwf_0_tcc ECMVWWF_O_TCC_JAN_1979 _UP rst ECMYF_O_TCC_JAN_1979 _UP rst 2 205141E 4 0 9927703 ecmvt_O tec ECMVF_O_TCC_FEB_1979 _UP rst ECMVVF_O_TCC_FEB_1979 _UP rst 9 947593E 13 0 9973668 lecmwf_0_tcc ECMVWF_0_TCC_MAR_1979 _UP rst ECMVWF_0_TCC_MAR_1979 _UP rst 0 025201613 0 996267 0 88453364 Choose Colormap ecmwf_0_tcc ECMWF_0_TCC_APR_1979 _UP rst ECMWF _0_TCC_APR_1979 _UP rst 0 00247395 0 99275714 r IDRIS256 v Choose Operation r Anomaly 3 save open your maps Save The interface is relatively easy to use It consists of 5 frames within one user window The top left frame houses the database which you access and expand using simple click and point techniques this frame is called Files To the right is the main user window frame called Main which displays the data file s you have chosen together with a chosen palette legend frame called Colors Below this is the user files box frame called Selected Files in which your currently chosen files reside At the bottom left of the window is the Options frame where you can change your operations zoom change color palette or even save a map Navigation is simple you just expand the database frame Files and click on the file you are interested in When you click on a file it appears in your working frames Selected Files below to
7. esolution of 1 25 by 1 0 Please note that it is best to use the BIPOL256 palette colormap in order to see the continental outlines 5 Options Frame bottom left There are several different operations that can be undertaken on the data and the maps displayed Options IDRIS256 Anomaly AJl Choose Colormap v Choose Operation v save open your maps Save Firstly using the and buttons one can zoom into areas of interest on the chosen map just click on the area of interest on the map Click on the arrow button again to stop zooming Secondly you can choose different colormaps or palettes to display the maps Please note that the best ones for viewing aerosol data are BIPOL256 BIMOD256 or QUANT256 Thirdly you can choose an operation These are simple mathematical operations performed on the selection of maps in your user window The following are enacted a AVERAGE the arithmetic average of all chosen user maps is displayed b SUM the arithmetic sum of all chosen user maps is displayed c MAX the maximum pixel value of all pixels of the chosen user maps is displayed d MIN the minimum pixel value of all pixels of the chosen user maps is displayed e ANOMALY this is a special feature firstly you must click on the sign to the left of the file name in the Selected files frame under OP It will change to a sion When this occurs the final map displayed i
8. ive and make a shortcut from your desktop to the executable file If you get an error when you try to click or run the executable file it is probable that you do not have the latest version of Java installed on your computer the interface requires Java version 1 4 2 or greater Fortunately the new Java version installations are located on the CD Rom They are as follows jre j2re 1_4_2_01 linux i586 rpm bin linux version jre j2re 1_4_2_O1 solaris sparc sh sun solaris jre j2re 1_4_2_01 windows i586 exe windows Just click or run the relevant file listed above and follow the instructions Once you have Java 1 4 2 installed you should be able to launch the FRIOWL interface 3 Launching the interface You will be presented with a Java applet interface such as shown below grahame FriOWL User Files L ESO L Longwave Radiation am ss s x ae aa 0 06331981 Air 2 Meters ji i ea k a 3 __ Total Cloud Cover J aa ss gt f 0 15456587 1979 i A JAN Ec s r FEB z i mi DAL 0 33705783 MAR z pee Ea S y may re s i o E 0 5195498 N a nial cae Banri r aia a 061079574 0 24581185 0 42830378 auc i w Pr BE Bae 070204175 SEP i i b a n OCT lt P H gt at tak om 07932877 Nov f DEC i Ta amp 1980 5 0 97577965 amp 21981 5 1982 selected cell value 0 91983 fe Maar Options Selected Files OP Category Filename D
9. s as follows oo es anomaly average of all the maps average of all the maps f Finally you can save your composite maps as a Single new map This avoids you having to click on the all the files again in the database window The file is saved in data format with the extension ser it can be found in the USERFILES directory located in the database window this file is saved locally when using the CD Rom but on the server if using the internet 6 An Example Click on the total cloud cover folder then on 1979 then on JAN This transports the January 1979 cloud cover file to your working window Do the same for all Januarys from 1979 to 1990 this will take some time but complete the exercise We now have 12 individual cloud data files for 12 different Januarys Now click on the Colormap option and change the colormap Choose whichever one pleases you Then click on the zoom button in the Options frame and click on the map to choose the area you want to zoom towards Click to zoom back out and then click the arrow button to stop the zoom function Now click on the Choose Operation dropdown list Choose AVERAGE The map displayed is now an average of all the maps displayed Change your choice to MAX and then MIN The maps displayed are the maximum and minimum values of pixels of all the maps displayed Now choose ANOMALY In order to make ANOMALY work yo
10. the right Each main folder has a series of subfolders and the data files are listed according to the month and year You can now interrogate your chosen files with options menu from the Options frame bottom left 4 Description of Database The main database has 11 different folders listed These include the following climatological variables note see Bugs in Section 8 also a Longwave radiation this is the monthly mean of outgoing longwave radiation olr in Wm as calculated by the NCEP NCAR Reanalysis model at a grid resolution of 2 5 The highest values are associated with the warmest areas of the earth because they radiate the greatest amounts of longwave radiation to space However thin cirrus clouds trap a significant amount of olr thus anomalously lower values of olr indicate the higher than normal presence of cirrus clouds e g compare the maps of Jan 1998 and Jan 1999 which show a strong El Nino pattern in the Pacific on how to do this see Examples in Section 6 b Air 2 metres air2m this is the mean monthly surface temperatures in Kelvin calculated for standard weather station height of 2m as determined by the NCEP NCAR Reanalysis Model at a grid resolution of 1 875 c Total cloud cover tcc this is the mean monthly total cloud cover in fractions 1 0 completely cloudy 0 0 completely clear as estimated for each pixel by the ECMWF Reanalysis Model at a grid resolution of a d Win
11. u must click on the sign to the left of the file name in the Selected files frame under OP The plus sign will change to a sign When this occurs the final map displayed is as follows cG cG anomaly average of all the maps average of all the maps Now click back to the AVERAGE function Now save your final map as tcc_mean_jan and click Save Now go to the user window Selected Files frame again and click the X on the far right of the screen under DEL This deletes maps from the current window Click the X for all the files until you have none left in the user window Now go to the database again and look in the folder USERFILES There you will find the map you saved This file is saved in ascii data format and resides in your local WINDOWS folder if you are running the interface from the CD Rom or in an account under your username on the server if you are running the interface from the internet Click on this file and immediately it is transported to your user window Note that the new map is the average of all 12 files that you had to click individually before this option avoids you having to click all 12 files again Now delete all files from the user window and go to the Longwave Radiation folder Click on Jan 1998 and Jan 1999 to transport these files to your working directory Choose Anomaly operation under Choose Operation Chang
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