Modeling nitrogen saturation in forest ecosystems in response to land use and atmospheric deposition

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: John D. Aber, Scott V. Ollinger, Charles T. Driscoll
Publication_Date: 1997
Title: Modeling nitrogen saturation in forest ecosystems in response to land use and atmospheric deposition
Edition:
Geospatial_Data_Presentation_Form: ASCII and image
Series_Information:
Series_Name: Ecological Modelling, 101: 61-78, 1997
Issue_Identification:
Publication_Information:
Publication_Place:
Publisher: CSRC, University of New Hampshire
Other_Citation_Details:
Online_Linkage: http://eos-earthdata.sr.unh.edu/
Description:
Abstract:
A generalized, lumped-parameter model of carbon (C) ,water and nitrogen (N) in interactions in forest ecosystems (PnET-CN) is presented. The model operates in a monthly time step and at the stand-to-watershed scale, and is validated against data on annual net primary productivity, monthly carbon and water balances, annual net N mineralization, nitrification, foliar N concentration and annual and monthly N leaching losses for two sites, Hubbard Brook (West Thornton, NH) and Harvard Forest (Petersham, MA). It is then used to predict transient responses in function resulting from changes in land use and N deposition, as well as the maximum rate of N cycling which can be sustained for any given combination of site, climate and species. Model predictions suggest a very long legacy effect of land use history on N cycling. Even with only one 'active' soil organic matter pool, complete recovery from three modest harvests at Hubbard Brook is predicted to require more than two centuries at current N deposition rates. Complete recovery is predicted to take even longer at the Harvard Forest where biomass removals have been more intense. PnET-CN is used to predict maximum sustainable rates of N cycling for 14 sites throughout the northeastern USA. Predicted maximum values were higher, as expected, than measured N mineralization rates for all but one site. The measured fraction of N mineralization nitrified at these 14 sites showed a general relationship with the ratio of measured net N mineralization. This latter ratio is discussed as a potentially useful indicator of the degree of nitrogen saturation in forest ecosystems. A regional map of predicted maximum N cycling rates is presented based on regressions between model predictions and summary climatic variables.
Purpose:
Not Available
Supplemental_Information:
Not Available
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.0
East_Bounding_Coordinate: -66.0
North_Bounding_Coordinate: 48.0
South_Bounding_Coordinate: 38.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > INDICATOR SPECIES
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOGEOCHEMICAL CYCLES
Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM
Theme_Keyword: Ammonium
Theme_Keyword: Nitrogen Oxides
Theme_Keyword: Nitrogen Saturation
Theme_Keyword: Northeastern Us
Theme_Keyword: BIOTA
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NORTHEASTERN US
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ANNETTE SCHLOSS
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Complex Systems Research Center
Address: Morse Hall
Address: University of New Hampshire
City: Durham
State_or_Province: New Hampshire
Postal_Code: 03824
Country: USA
Contact_Voice_Telephone: 603-862-0348
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: annette.schloss@unh.edu
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: UNH/EOS/CSRC/EOS-EARTHDATA > EOS-EARTHDATA, Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space, Univ. of New Hampshire
Contact_Person: EARTH SYSTEMS RESEARCH CENTER
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Complex Systems Research Center
Address: Institute for the Study of Earth, Oceans, and Space
Address: Morse Hall
Address: University of New Hampshire
City: Durham
State_or_Province: New Hampshire
Postal_Code: 03824
Country: USA
Contact_Voice_Telephone: 1-603-862-3785
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: eosearthdatasupport@foghorn.sr.unh.edu
Resource_Description: EOSWEBSTER_PNET_Max_N_Cycle
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII, GIF images
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://eos-earthdata.sr.unh.edu/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.pnet.sr.unh.edu
Access_Instructions:
Pnet model journal articles, PnET source code, PnET executable.
Fees: None
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Metadata_Reference_Information:
Metadata_Date:
Metadata_Review_Date: 20130809
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: RITA FREUDER
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Complex Systems Research Center
Address: Institute for the Study of Earth, Oceans, and Space
Address: Morse Hall
Address: University of New Hampshire
City: Durham
State_or_Province: New Hampshire
Postal_Code: 03824
Country: USA
Contact_Voice_Telephone: 603-862-1792
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: Rita.Freuder@unh.edu
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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