Upload
thuong
View
35
Download
1
Tags:
Embed Size (px)
DESCRIPTION
Technologies Used for Customized Dynamic Web Access to a Unique Collection of Arctic Change Time Series. Willa H. Zhu James E. Overland JISAO/UW - PMEL/NOAA. American Meteorological Society / IIPS January 13-17, 2002, Orlando, FL. The Unaami Data Collection - PowerPoint PPT Presentation
Citation preview
Technologies Used for Customized Dynamic Web Access to a Unique
Collection of Arctic Change Time Series
Willa H. ZhuJames E. OverlandJISAO/UW - PMEL/NOAA
American Meteorological Society / IIPS January 13-17, 2002, Orlando, FL
Background
The Arctic Is one of the least explored, studied and understood places on earth
The inter-agency SEARCH science plan identifies the complex suite of interrelated pan-Arctic changes gives them the name “Unaami” (Yup’ik word for “tomorrow”)
The Unaami Data Collection consists of over 80 carefully selected time series
unique, interdisciplinary, and diverse spanning a wide geographic range from 1970 to the present
quantifies Arctic changes
The Unaami Web Site
Provides information and access to this unique collection of Arctic Time Series highly interactive many functions for
viewing and plotting data and metadata
The Unaami data collection web access system is described in AMS IIPS paper 4.11
http://www.unaami.noaa.gov
Web Technologies
Java Applets/JavaScript Provide highly user
interactive front-end data selection features
Dynamic HTML JavaScript CGI (Perl, C) Cascading Style Sheets
(CSS)
Back-end software Utilities for web update EPIC analyses
programs PPLUS plotting tools
MySQL Database Store metadata
Backend Data Management
Data Converted into netCDF files categorized by data type (e.g. biology, ocean, fisheries, etc.)
Metadata stored in MySQL database managed using EPIC software (http://www.epic.noaa.gov)
(database structure, data loading, data selecting, etc.) Update utilities
Facilitate addition/removal of time series dataset Pre-generate web page components
Polar stereographic map showing station locations Station location and data type color key information JavaScript containing metadata
Overview of functionality
Data access procedure:
2. Refine selection / Data access options
3. Results
1. Select Data (and view quick info, make quick plot)
Make quick plot
Data Selection and Browse
Show quick info
Select data for further plotting, listing and downloading
Java Applets/JavaScript for Data Selection
JavaScript
JavaScript Load data information Generate “data type” list dynamically Interact with Java Applets Select data by type (different color represent different type) Retain user’s selection by using Cookies
Java Applet Java Applets
Selectable map (select region or single station)
Interact with JavaScript Convert coordinate system
between polar and cartesian Initiate CGI for quick info and
quick plot
Refine Selection / Data Access Use JavaScript Get user’s selection from Cookie Display the metadata and time
range dynamically Select/Deselect by
data type region
Sort the data by data type region start year longitude Latitude
Refine selection (retain/delete)
Refine SelectionData Access
Data Access Make Stacked Time
Series Plot
Make Single Time Series Plot
Make Correlation Matrix
View Data Information
Display Data in ASCII format
Download netCDF data files
Results
CGI (Perl) Initiate EPIC program and
PPLUS script to generate plots and GIF files
Generate PostScript files Generate HTML
JavaScript Dynamically generate
HTML code Control user’s selection
on GIF and download Postscripts files
Stacked Time Series Plot
Results
Correlation matrix CGI (C and Perl)
Calculate correlation coefficient
Generate HTML
Results
Data Access CGI (C and Perl)
List data (access netCDF)
List metadata (access the database)
Great TAR file of netCDF files for downloading
Generate HTML
SummaryThe Unaami time series data are representative of
changes in the Arctic region since 1970.
Unaami data collection access system integrates several modern web technologies for easy,
interactive access to this unique collection of time series.
provides a useful tool for studying and understanding recent atmospheric, oceanic, and terrestrial changes in the Arctic.
Future Plan Data analyses will be included as they are completed. The Unaami Data Collection will be expanded to include
new time series as they are discovered.
If you know of any time series that represents any aspect of Arctic change, please contact us:
Dr. James E. Overland NOAA/Pacific Marine Environmental Laboratory
http://www.unaami.noaa.gov