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  1. A copula-based joint deficit index for droughts

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    31 Mar 2010 | Contributor(s): Rao S Govindaraju

    Current drought information is based on indices that do not capture the joint behaviors of hydrologic variables. To address this limitation, the potential of copulas in characterizing droughts from multiplevariables is explored in this study. Starting from the standardized index (SI) algorithm, a...

  2. A seasonal-scale climatological analysis correlating spring tornadic activity with antecedent fall–winter drought in the southeastern United States

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    14 Jun 2011 | Publications | Contributor(s): Dev Niyogi

    Using rain gauge and satellite-based rainfall climatologies and the NOAA Storm PredictionCenter tornado database (1952–2007), this study found a statistically significant tendency forfall–winter drought conditions to be correlated with below-normal tornado days the followingspring in north...

  3. A spatio-temporal drought analysis for the Midwestern US

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    15 Jun 2009 | Publications | Contributor(s): Rao S Govindaraju, Dev Niyogi

    Droughts are prolonged abnormalities of moisture deficits that vary widely across temporal and spatial scales. Many hydrometeorologic variables are used to monitor the status of a drought. However, because of the dependence structure between all affecting variables under various temporal windows,...

  4. AgMIP GEOSHARE Tool with iData Integration Demo

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    06 Mar 2015 | Tools | Contributor(s): Nelson Benjamin Villoria, Joshua Elliott, Christoph Mí_ller, Jaewoo Shin, Christopher Panza, Lan Zhao

    Aggregate yield shocks provided by the AgMIP's Global Gridded Crop Modeling Initiative (Ag-GRID) from their original 30x30 min resolution to any user specified level

  5. AgMIP Tool: A GEOSHARE tool for aggregating outputs from the AgMIP's Global Gridded Crop Modeling Initiative (Ag-GRID)

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    09 Jul 2014 | Tools | Contributor(s): Nelson Benjamin Villoria, joshua elliott, Christoph Müller, Jaewoo Shin, Lan Zhao

    Aggregate the yield shocks provided by the AgMIP project from their original 30x30 min resolution to any user specified level.

  6. Data-driven Collaboration Environments - Integrating HUBzero and iRODS

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    15 Sep 2015 | Publications | Contributor(s): Rajesh Kalyanam

    As part of an effort to establish a community-based data sharing environment, we previously developed a HUBzero-based web component, iData. Using the open-source data management software, iRODS, iData  provides hub users and tools with the ability to publish, manage, discover...

  7. Developing Open Source Geospatial Data Analysis Building Blocks Software

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    26 Oct 2017 | Publications | Contributor(s): JIngbo Wu

    This is an article published at Journal of Purdue Undergraduate Research by Jingbo Wu describing his summer intern work as part of the GABBs project.

  8. Energy prices will play an important role in determining global land use in the twenty first century

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    31 Jul 2014 | Publications | Contributor(s): Jevgenijs Steinbuks, Tom Hertel

    Global land use research to date has focused on quantifying uncertainty effects of three major drivers affecting competition for land: the uncertainty in energy and climate policies affecting competition between food and biofuels, the uncertainty of climate impacts on agriculture and forestry,...

  9. Graphical User Interface for the California Food-Energy-Water System (CALFEWS) simulation model

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    22 Jan 2021 | Tools | Contributor(s): Andrew L Hamilton, Harrison Zeff, Keyvan Malek, Jonathan Herman, Jonathan Cohen, Josue Medellin-Azuara, Patrick M. Reed, Gregory W. Characklis

    Graphical User Interface for the California Food-Energy-Water System (CALFEWS) simulation model

  10. iData Cheat Sheet

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    19 Jun 2015 | Teaching Materials | Contributor(s): Lan Zhao, Carol Song

    This document is a quick note that guides new iData users through the steps of registering a hub account, creating a new dataset, uploading some files, and sharing with others.

  11. iData Packaging Tool

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    24 May 2018 | Tools | Contributor(s): Rajesh Kalyanam, Rob Campbell (contributor), Lan Zhao (contributor)

    Package iData files into a BagIT bag for subsequent import to a different project.

  12. iData Tutorial

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    22 Jul 2016 | Teaching Materials | Contributor(s): Abilene Thiele Concepcion Perez

    *Note that the number before each step is the time on the YouTube video below where it shows how each step is done. Click on "View Resource" on the top right to watch the video.Start iData [0:05] Go to http://mygeohub.org/idata to load the iData application. It starts with...

  13. iData Walkthrough

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    21 Oct 2017 | Online Presentations | Contributor(s): Rajesh Kalyanam

    This video demonstrates the features of the GABBs iData data management building block such as automatic metadata extraction and geospatial file preview. It also walks through how iData files can be used in both hub tools and publications. 

  14. LANDPARAM

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    20 Jul 2015 | Tools | Contributor(s): Jing Liu, Nelson Benjamin Villoria (contributor)

    A tool to aggregate cropland supply and land transformation elasticities

  15. Marker Set

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    15 Jun 2018 | Tools | Contributor(s): Rob Campbell

    Create iData Marker Set definition files (.ims)

  16. Market-mediated environmental impacts of biofuels

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    31 Jul 2014 | Publications | Contributor(s): Tom Hertel, Wallace E. Tyner

    This paper surveys the evidence on market-mediated environmental impacts of biofuels, with special attention to the indirect greenhouse gas emissions stemming from land cover change in the wake of increased demand for biofuel feedstocks. We find clear evidence that market mediated land use...

  17. Metadata Exporter

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    20 Mar 2018 | Tools | Contributor(s): Rajesh Kalyanam

    Export geospatial file metadata to the ISO-19115 standard

  18. PEGASUS (Predicting Ecosystem Goods And Services Using Scenarios)

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    14 Jul 2014 | Tools | Contributor(s): Delphine, Navin Ramankutty, I Luk Kim, Rajesh Kalyanam

    A GEOSHARE tool for conducting live simulations using PEGASUS (Predicting Ecosystem Goods And Services Using Scenarios)

  19. Root Zone Water Quality Model

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    06 Jun 2022 | Tools | Contributor(s): Balaji Sesha Srikanth Pokuri, Anupam Bhar (contributor)

    Whole-system model for studying crop production and environmental quality under current and changing climate conditions., developed by USDA-ARS

  20. U2U Accomplishment Highlights (April 2011 - Sept 2012)

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    17 Oct 2012 | Publications | Contributor(s): Melissa Widhalm, John Kriva

    This document provides a brief overview of the top accomplishments from the U2U project from April 2011 - Sept 2012.