iri/ldeo climate data library...2017/07/06 · ‣provide an overview of the iri/ldeo climate data...

IRI/LDEO Climate Data Library

Massimiliano PasquiInstitute of Biometeorology, CNR-National Research Council Rome, Italy

TUTORIAL

‣provide an overview of the IRI/LDEO Climate Data Library resources;

‣provide a basic skill for identify a data set, make geographical and temporal selection on it, manipulate it;

‣ show the large amount of analysis tools available;

‣provide guidelines for downloading data and/or analysis.

AboutA step–by–step Tutorial

This online exercise is aimed to:

Exercise: Targetdataset | spatial domani | time window

TARGET DATA SET

the “Monthly Sea Surface Temperature Analysis” (Reynolds Smith Optimal Interpolation v.2) maintained by the National Centers for Environmental Prediction (NCEP) of the NOAA*

* National Oceanic And Atmospheric Administration

the Mediterranean basin

TARGET SPATIAL DOMAIN

August time series from 1982 to 2014

TIME WINDOW

IRID

LWhat is IRIDL? IRI DATA LIBRARY

http://iridl.ldeo.columbia.edu

Massimiliano Pasqui - CNR-IBIMET - IRI/LDEO Climate data Library Tutorial

IRIDL LDEO

http://iridl.ldeo.columbia.edu/


A powerful and freely accessible online data repository and analysis tool that allows a user to view, analyze, and download hundreds of terabytes of climate-related data through a standard web browser.

“The IRI Data Library

‣access any number of datasets;

‣create analyses of data ranging from simple averaging to more advanced EOF analyses using the Ingrid Data Analysis Language;

‣monitor present climate conditions with maps and analyses in the Maproom;

‣create visual representations of data, including animations;

‣download data in a variety of commonly-used formats, including GIS-compatible formats.

‣ there are also a couple of efficient tools: the Search Bar and the Help Resources


A powerful free tool

CustomSearchwithintheIRIDL.

http://iridl.ldeo.columbia.edu

APowerfulhelpresourcesrepository!


IRIDL LDEO



… we want identify Reynolds Smith Optimal Interpolation v.2 anomaly over the Mediterranean basin for August, from 1982 to 2014, maintained by NCEP – NOAA …


Searchdatabysource

1

SearchfortheNOAAlink


Now follow step by step the following passages: 1.  Search for the NOAA link 2.  Select the NCEP link 3.  Select the EMC link 4.  Select the CMB link 5.  Select the GLOBAL link 6.  Select the Reyn_SmithOIv2 link 7.  Select monthly 8.  Select the SeaSurfaceTemperature Anomaly link

Finally, the dataset is selected!Massimiliano Pasqui - CNR-IBIMET - IRI/LDEO Climate data Library Tutorial

Step by step

This is the page you should have in front of you


ViewerandOpDonstoselectoradd

SequenDallinksofalltheselectedopDons!

GeneralInfoontheselectedDataset

OtherInfoontheselectedDataset

DatasetReferences

How to read the dataset page

SelectnowtheViewerlink


Mapping the dataset In order to map data with specific settings a powerful tool is provided by the “Views” tab:

The Views tab opens different Data Views Options

Selectthecolorswithcoaststab


SelectTime

After this selection a new page will be opened: the Data Viewer Page, where geographical and time settings could be applied by changing values.


Youcanchangetheplotgeographic

domainhere:

SelectVariableRange

Viewer selection - You can change values in the specific box to modify geographical domain or reference time. Once you have changed the values, to apply them click on the refresh red button.


Data-SelecDonlink


Data selection Now go back to the Dataset Page, by clicking the link on the top of the page (where the is the name of the selected dataset), or simply going back in the browser history.

Once you are here, click on the link Data SelecDon, next to the Viewer link on the top of the page, as shown below:

SelectedNewRanges

AppliedDataselecDon

Geographical&TimeDomain

Data selection In the Geographical and Time Domain Select the New Ranges, as follow: X Longitude 39.5W to 49.5E Y Latitude 30.5N to 49.5N T Time Aug 1982 to Aug 2014

Now you can Apply data selection by clicking on Restrict Ranges

NewrangesappearswiththeirspecificaDonsinthegreybox

Closingthe

selecDon


Stop Selection

Now you can click on Stop Selection, after verifying the data entered.

Nowclickthe“Expert

Mode”link

Performed

selecDonsappear

asnew

concatenated

links!

Expert mode

Here you can see the selection as new bundled links! You can change the parameters in another way, as shown below


Command box - Expert mode The “expert mode” is an alternative way to see and modified options directly in the command box.

…andchoose

“colorswith

coasts”

Nowclickon

theplot


Views mode

Changethespecific

monthandclickon

the“Refresh”

bu_on.


Change the temporal range Now the dataset has a new geographical and temporal ranges.

The SST monthly anomaly for August 2014


Step by step to set the Data Filters

Nowclickon

theaddress


…andnowclick

ontheDatafilters

Againanychoiceisaweb-linkopDon.NowyouhavetoselecttheXYopDonforaspaceaverageovertheenDredomainpreviously

selected.

ClickonViews

Gototheplot

Now you should see this Graph

Here the SST monthly anomaly time series averaged over the selected domain. This time series shows only the August data from 1982 to 2014.

Nowclick

againonthe

address

Gotothe

downloadpage

Forexampleselect

the“ColumnarTable”

Data files Here there are many data download options available, with specific file format and for specific sofware.


Data download The data that you just downloaded should look like this

Putthe“reyn_smithoiv2

dataset”keywordsinthesearchwindow…


An alternative and more “essential” dataset search … Go back to the homepage of the IRI data library


Herethedesired

dataset.Clickonit

andthisiswhatyou

aregoingtosee

Results of the research

Thank you!

Massimiliano PasquiInstitute of Biometeorology, CNR-National Research Council Rome, Italy

iri/ldeo climate data library...2017/07/06 · ‣provide an overview of the iri/ldeo climate data...

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