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ISLSCP II ECOSYSTEM ROOTING DEPTHS

Entry ID: ISLSCP_EROOT

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Summary

Abstract: The goal of this study was to predict the global distribution of plant rooting depths based on data about global aboveground vegetation structure and climate. Vertical root distributions influence the fluxes of water, carbon, and soil nutrients and the distribution and activities of soil fauna. Roots transport nutrients and water upwards, but they are also pathways for carbon and nutrient ... transport into deeper soil layers and for deep water infiltration. Roots also affect the weathering rates of soil minerals. For calculating such processes on a global scale, data on vertical root distributions are needed as inputs to global biogeochemistry and vegetation models. In the Project for Intercomparison of Land Surface Parameterization Schemes (PILPS), rooting depth and vertical soil characteristics were the most important factors explaining scatter for simulated transpiration among 14 land-surface models. Recently, the Terrestrial Observation Panel for Climate of the Global Climate Observation System (GCOS) identified the 95% rooting depth as a key variable needed to quantify the interactions between the climate, soil, and plants, stating that the main challenge was to find the correlation between rooting depth and soil and climate features (GCOS/GTOS Terrestrial Observation Panel for Climate 1997). In response to this challenge, a data set of vertical rooting depths was collected from the literature in order to construct maps of global ecosystem rooting depths. The parameters included in these data sets are estimates for the soil depths containing 50% and 95% of all roots, termed 50% and 95% rooting depths (D50 and D95, respectively). Together, these variables can be used to calculate estimates for vertical root distributions, using a logistic equation provided in this documentation. The data represent mean ecosystem rooting depths for 1 by 1 degree grid cells. Related data sets:ÃÂ The ORNL DAAC offers related data sets by Jackson et al. (2003), Gordon and Jackson (2003), Schenk and Jackson (2003), and Gill and Jackson (2003). This data set is one of the products of the International Satellite Land-Surface Climatology Project, Initiative II (ISLSCP II) data collection which contains 50 global time series data sets for the ten-year period 1986 to 1995. Selected data sets span even longer periods. ISLSCP II is a consistent collection of data sets that were compiled from existing data sources and algorithms, and were designed to satisfy the needs of modelers and investigators of the global carbon, water and energy cycle. The data were acquired from a number of U.S. and international agencies, universities, and institutions. The global data sets were mapped at consistent spatial (1, 0.5 and 0.25 degrees) and temporal (monthly, with meteorological data at finer (e.g., 3-hour)) resolutions and reformatted into a common ASCII format. The data and documentation have undergone two peer reviews. ISLSCP is one of several projects of Global Energy and Water Cycle Experiment (GEWEX) [http://www.gewex.org/] and has the lead role in addressing land-atmosphere interactions -- process modeling, data retrieval algorithms, field experiment design and execution, and the development of global data sets.

Related URL

Link: GET DATA

Geographic Coverage

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Spatial coordinates

N: 90.0

S: -90.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: Daniela Di Iorio

Dataset Title: November 2001 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Duplin River transect

Dataset Release Date: November 1, 2003

Dataset Release Place: Athens, Georgia

Dataset Publisher: Georgia Coastal Ecosystems LTER

Online Resource: http://gce-lter.marsci.uga.edu/lter/asp/db/dataset_details.asp?PHY-...

Parent DIF

This data set description is a member of a collection. The collection is described in
lter_GCE

Temporal Coverage

Start Date: 2001-11-27

Stop Date: 2001-11-28

Location Keywords

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GEORGIA

Science Keywords

TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CONDUCTIVITY

TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > WATER TEMPERATURE

ISO Topic Category

ENVIRONMENT

GEOSCIENTIFIC INFORMATION

INLAND WATERS

OCEANS

Project

LTER > Long-Term Ecological Research

Access Constraints Data Access Policy
As a member of the Long Term Ecological Research Network, the Georgia
Coastal Ecosystems LTER Program is committed to providing access to data
collected under the auspices of our project in a timely fashion. Study
results will be published in the scientific literature, and documented
data sets and other information will be provided on the World ...

Use Constraints All publications based on this data set must cite the contributor and Georgia
Coastal Ecosystems LTER project, and two copies of the manuscript must be
submitted to the GCE-LTER Information Management Office.

Ancillary Keywords

Georgia Coastal Ecosystems

Long Term Ecological Research

Data Set Progress

COMPLETE

Originating Center

Data Center

Georgia Coastal Ecosystems, Long-Term Ecological Research Network Office

Data Center URL: http://gce-lter.marsci.uga.edu/lter/

Data Center Personnel
Name: WADE SHELDON Phone: (706) 542-5955 Fax: (706) 542-5888 Email: sheldon at arches.uga.edu Contact Address: Department of Marine Sciences University of Georgia City: Athens Province or State: GA Postal Code: 30602-3636 Country: GEORGIA

Data Center Personnel
Name: DANIELA DI IORIO Phone: (706) 542-7020 Fax: (706) 542-5888 Email: daniela at uga.edu Contact Address: Department of Marine Sciences University of Georgia City: Athens Province or State: GA Postal Code: 30602-3636 Country: USA

Personnel

TYLER B. STEVENS

Role: DIF AUTHOR

Phone: (301) 614-6898

Fax: 301-614-5268

Email: Tyler.B.Stevens at nasa.gov

Contact Address:

NASA Goddard Space Flight Center

Global Change Master Directory

City: Greenbelt

Province or State: MD

Postal Code: 20771

Country: USA

WADE SHELDON

Role: TECHNICAL CONTACT

Phone: (706) 542-5955

Fax: (706) 542-5888

Email: sheldon at arches.uga.edu

Contact Address:

Department of

Marine Sciences

University of Georgia

City: Athens

Province or State: GA

Postal Code: 30602-3636

Country: GEORGIA

DANIELA DI IORIO

Role: TECHNICAL CONTACT

Phone: (706) 542-7020

Fax: (706) 542-5888

Email: daniela at uga.edu

Contact Address:

Department of Marine Sciences

University of Georgia

City: Athens

Province or State: GA

Postal Code: 30602-3636

Country: USA

Creation and Review Dates

DIF Creation Date: 2005-03-28

Last DIF Revision Date: 2005-04-01

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