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Acceptance and utilization of LTER data requires that:

(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:

Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543

Dataset URLs: METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Compressed zip, Excel file with Metadata and data
Dataset ID: 1921_2100ergemiii
Dataset Title: The role of down-slope water and nutrient fluxes in the response of Arctic hill slopes to climate change, output from MBLGEMIII.
Investigator 1:  
First Name: Ed
Last Name: Rastetter
Address line 1: Marine Biological Lab
Address line 2: 7 MBL St
Address line 3:
City: Woods Hole
State: MA
Zip Code: 02543
Country: USA
Associate Investigators: B. L. Kwiatkowski, S. Le Dízes, J.E. Hobbie.
Keywords: global change, scaling, ecosystem model, carbon sequestration, arctic tundra, climate change
Abstract: Output data sets of the MBL-GEM III model for a typical tussock-tundra hill slope. The model is described in two papers:

Le Dízes, S., Kwiatkowski B.L., Rastetter E.B., Hope A., Hobbie J.E., Stow D., Daeschner S., 2003 Modelling biogeochemical responses of tundra ecosystems to temporal and spatial variations in climate in the Kuparuk River Basin (Alaska), Journal of Geophysical Research Vol. 108 No. D2 10.1029/2001JD000960.

Rastetter, E.B., B. L. Kwiatkowski, S. Le Dízes, and J.E. Hobbie. 2004. The Role of Down-Slope Water and Nutrient Fluxes in the Response of Arctic Hill Slopes to Climate Change. Biogeochemistry 69:37-62.
Contact: Arctic LTER Information Manager
The Ecosystems Center
Marine Biological Lab
7 MBL St
Woods Hole, MA 02543
Phone (508) 289 7496
Email: arc_im@mbl.edu
Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File URL http://ecosystems.mbl.redu/ARC/modeling/GEM/1921_2100ergemiii.zip
Data File Name 1921_2100ergemiii.zip
Beginning Date 1/1/1921
End Date 12/31/2100
Number of Data Records
Other Files to Reference
Availability Status 1
Quality Control Information
Maintenance Description
Log of Changes:
RESEARCH LOCATION: Site 1
Geographic Description moist tussock tundra typical of the northern foothills at the Arctic Long-Term Ecological Research (LTER) site near Toolik Lake, Alaska (68 degrees 83' 80" N, 149 degrees 83' 60"W.
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude 68.614
Longitude -149.309
Methods: We simulated twenty 1m x 1m plots spaced 5m apart on a 100m transect running parallel to the water flow path down a uniform hill slope covered with tussock tundra. We assumed the hill slope had a uniform aspect and slope so that there were not convergent or divergent water flow paths. Water was therefore assumed to run from one plot, through the intervening 4m of tundra, to the next plot down hill. Precipitation inputs and evapotranspiration losses for the intervening 4m were assumed to be the same as those for the uphill plot. The inorganic N concentration in the soil water moving down slope was also assumed to be the same as that leaving the uphill plot, thus the amount of N moving down slope increased in proportion to the amount of water flow. Simulations used a yearly time step for 180 years, from 1921 to 2100 based on the historical reconstruction of climate and CO2 (1921-2000) and the predicted future climate scenarios (2001-2100). Two scenarios enabled the investigation of the effects of two contrasting moisture response curves for microbial activity (Flanagan and Veum 1974 and Sarah Hobbie pers. com.). Because Soil moisture in these soils is almost always high (> 80 mm water), the important distinctions between these two response curves is the decline in decomposition rate as soil moisture increases above the optimum moisture level; the Flanagan and Veum curve declines more strongly as moisture increases above the optimum than does the Hobbie curve. These 40 files contain all simulation results for each scenario for individual cells along the transect. See Rastetter, E.B., B. L. Kwiatkowski, S. Le Dízes, and J.E. Hobbie. 2004. The Role of Down-Slope Water and Nutrient Fluxes in the Response of Arctic Hill Slopes to Climate Change. Biogeochemistry 69:37-62.

Citations:

Flanagan, P.W. and Veum, A.K. 1974. Relations between respiration, weight loss, temperature, and moisture in organic residues on tundra. Pages 249-277 in Holding, A.J. et al. (eds.) Soil organisms and decomposition in tundra. Tundra Bione Steering committee, Stockholm, Sweden.

FORMAT OF VARIABLES:
The compressed file has the following files:

File Name: FaVCell1.dat through FaVCell20.dat and HobCell1.dat through HobCell123.dat

File Type: Ascii text

File naming convention: YYYCellX.dat where YYY = FaV (Flanagan and Veum response curve) or Hob (Sarah Hobbie moisture response curve) and X = 1-20 is cell number for locations 5 m apart with cell 1 at the top of the hill slope and cell 20 at the bottom.

Files are space delimited, all fields are 20 characters wide with one blank space separating fields.

Row one contains variable names (alpha-numeric)

Row two contains units (alpha-numeric)

Remaining rows contain numeric values: Column one (time) is in integer format, remaining columns are in scientific notation with the following format X.XXXXXXXXXXXXE+XXX

NUMBER OF RECORDS: 180 plus two header records
NUMBER OF COLUMNS: 154

ACKNOWLEDGEMENTS: This research was supported by funds from the National Science Foundation (NSF-LTER 0221000# and NSF-OPP 9732281).

Data Table

Variable Name Variable Description Units Measurement Scale Code Infomation Number Type DateTime Format Missing Value Code Missing Value Code Explanation
Time Year   datetime     yyyy    
CO2 ppmv partsPerMillion ratio   real      
Daily Air Temp max Average maximum daily temperature for growing season deg C celsius interval   real      
Daily Air Temp min Average minimum daily temperature for growing season deg C celsius interval   real      
Daily Shortwave Rad. Average daily short-wave radiation MJ m-2 day-1 megaJoulesPerMeterSquaredPerDay ratio   real      
Precipitation m H2O yr-1 meter ratio   real      
NH4 Deposition gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Plant Act Seas Leng active season length for vegetation days number ratio   real      
Soil Act Seas Leng active season length for soil days number ratio   real      
Foliage Carbon gC m-2 gramsPerSquareMeter ratio   real      
Wood Carbon gC m-2 gramsPerSquareMeter ratio   real      
Root Carbon gC m-2 gramsPerSquareMeter ratio   real      
Foliage Nitrogen gN m-2 gramsPerSquareMeter ratio   real      
Wood Nitrogen gN m-2 gramsPerSquareMeter ratio   real      
Root Nitrogen gN m-2 gramsPerSquareMeter ratio   real      
Labile Foliage C gC m-2 gramsPerSquareMeter ratio   real      
Labile Wood C gC m-2 gramsPerSquareMeter ratio   real      
Labile Root C gC m-2 gramsPerSquareMeter ratio   real      
Labile Foliage N gC m-2 gramsPerSquareMeter ratio   real      
Labile Wood N gC m-2 gramsPerSquareMeter ratio   real      
Labile Root N gC m-2 gramsPerSquareMeter ratio   real      
Soluble SC Acid soluble soil C gC m-2 gramsPerSquareMeter ratio   real      
Extractive SC Polar plus non-polar extractable soil C gC m-2 gramsPerSquareMeter ratio   real      
Insoluble SC Acid insoluble soil C gC m-2 gramsPerSquareMeter ratio   real      
Humus SC Humus soil C gC m-2 gramsPerSquareMeter ratio   real      
Active SN Active soil organic N gN m-2 gramsPerSquareMeter ratio   real      
Humus SN Humus Soil organic N gN m-2 gramsPerSquareMeter ratio   real      
Soil NH4 gN m-2 gramsPerSquareMeter ratio   real      
dFoliage Carbondt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dWood Carbondt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dRoot Carbondt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dFoliage Nitrogendt Annual rate of change for state variable listed above gN m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dWood Nitrogendt Annual rate of change for state variable listed above gN m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dRoot Nitrogendt Annual rate of change for state variable listed above gN m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dLabile Foliage Cdt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dLabile Wood Cdt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dLabile Root Cdt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dLabile Foliage Ndt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dLabile Wood Ndt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dLabile Root Ndt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dSoluble SCdt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dExtractive SCdt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dInsoluble SCdt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dHumus SCdt Annual rate of change for state variable listed above gC m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dActive SNdt Annual rate of change for state variable listed above gN m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dHumus SNdt Annual rate of change for state variable listed above gN m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
dSoil NH4dt Annual rate of change for state variable listed above gN m-2yr-1 gramsPerMeterSquaredPerYear ratio   real      
Net Plant Prod. Net primary production (NPP) gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Plant Resp. Total plant respiration gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Litt C Total litter C gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Litt N Total litter N gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Photosynthesis gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
N Translocation Total N translocation from leaves before tissue abscission gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Structural Transloca N translocation from structural component g N m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Labile Translocation N translocation from labile component g N m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
NH4 Uptake gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Min root C:N Minimum root C:N ratio (diagnostic variable) g C g-1 N dimensionless ratio   real      
C storage to Clf Gross C flux to labile component of leaves gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
C storage to Clw Gross C flux to labile component of wood gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
C storage to Clr Gross C flux to labile component of roots gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
N storage to Nlf Gross N flux to labile component of leaves gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
N storage to Nlw Gross N flux to labile component of wood gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
N storage to Nlr Gross N flux to labile component of roots gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Transport from Clf Gross C flux out of labile component of leaves gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Transport from Clw Gross C flux out of labile component of wood gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Transport from Clr Gross C flux out of labile component of roots gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Transport from Nlf Gross N flux out of labile component of leaves gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Transport from Nlw Gross N flux out of labile component of wood gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Transport from Nlr Gross N flux out of labile component of roots gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Net C Alloc to Clf Net C flux to labile component of leaves gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Net C Alloc to Clw Net C flux to labile component of wood gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Net C Alloc to Clr Net C flux to labile component of roots gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Net N Alloc to Nlf Net N flux to labile component of leaves gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Net N Alloc to Nlw Net N flux to labile component of wood gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Net N Alloc to Nlr Net N flux to labile component of roots gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Foliage C Growth gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Wood C Growth gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Root C Growth gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Foliage N Growth gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Wood N Growth gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Root N Growth gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Sapwood Sapwood C gC m-2 gramsPerSquareMeter ratio   real      
Sapwood Nitrogen g N m-2 gramsPerSquareMeter ratio   real      
Tot Foliage Litter C Total litter C from leaves gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Wood Litter C Total litter C form wood gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Root Litter C Total litter C from roots gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Tot Foliage Litter N Total litter N from leaves gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Wood Litter N Total litter N form wood gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Root Litter N Total litter N from roots gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Str Foliage Litter C Structural litter C from leaves gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Str Wood Litter C Structural litter C form wood gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Str Root Litter C Structural litter C from roots gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Str Foliage Litter N Structural litter N from leaves gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Str Wood Litter N Structural litter N form wood gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Str Root Litter N Structural litter N from roots gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Lab Foliage Litter C Labile litter C from leaves gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Lab Wood Litter C Labile litter C form wood gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Lab Root Litter C Labile litter C from roots gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Lab Foliage Litter N Labile litter N from leaves gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Lab Wood Litter N Labile litter N form wood gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Lab Root Litter N Labile litter N from roots gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Foliage Respiration Total respiration from leaves gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Wood Respiration Total respiration from wood gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Root Respiration Total respiration from roots gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Metabolic Fol. Resp. metabolic respiration from leaves g C m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Metabolic Wood Resp. metabolic respiration from wood g C m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Metabolic Root Resp. metabolic respiration from roots g C m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Foliage Growth Resp. Growth respiration from leaves g C m-2 gramsPerSquareMeter ratio   real      
Wood Growth Resp. Growth respiration from wood g C m-2 gramsPerSquareMeter ratio   real      
Root Growth Resp. Growth respiration from roots g C m-2 gramsPerSquareMeter ratio   real      
Resp Temp. Func. Temperature response function for plant respiration unitless dimensionless ratio   real      
Foliage Primary Prod Tissue NPP g C m-2 yr-1 gramsPerSquareMeter ratio   real      
Wood Primary Prod Tissue NPP g C m-2 yr-1 gramsPerSquareMeter ratio   real      
Root Primary Prod Tissue NPP g C m-2 yr-1 gramsPerSquareMeter ratio   real      
Vegetation Carbon Total C in vegetation g C m-2 gramsPerSquareMeter ratio   real      
Vegetation Nitrogen Total n in vegetation g N m-2 gramsPerSquareMeter ratio   real      
Foliage C:N g C g-1 N dimensionless ratio   real      
Wood C:N g C g-1 N dimensionless ratio   real      
Root C:N g C g-1 N dimensionless ratio   real      
Air Temperature Average air temperature deg C celsius interval   real      
Plant Season Length days-1 number ratio   real      
Soil Temperature deg C celsius interval   real      
Litter C-Soluble SC Litter input to acid soluble component of soils gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Litter C-Extract SC Litter input to polar plus non-polar extractive component of soils gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Litter C-Insol SC Litter input to acid insoluble component of soils gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Solub SC-Extract SC C flux from acid soluble to extractive component of soil gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Extract SC-Insol SC C flux from extractive to acid insoluble component of soils gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Insol SC-Extract SC C flux from acid insoluble to extractive component of soils gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Insol SC-Humus SC C flux from acid insoluble to humus component of soils gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Extractives Resp. Respiration from active soil components gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Humus Resp. Respiration from humus gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Soil Resp Temp Facto temperature response function for soil metabolic rate days yr-1 number ratio   real      
Active SN-Humus SN N flux from active organic N to humus N gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Act SN-Inorg SN Gross N mineralization from active N gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Inorg SN-Act SN Gross N immobilization into active organic N gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Humus SN-Inorg SN Gross mineralization from Humus N gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Soil Resp. Total microbial respiration from soils gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Net N Min. Net N mineralization gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Soil Carbon g C m-2 gramsPerSquareMeter ratio   real      
Total Soil Nitrogen g N m-2 gramsPerSquareMeter ratio   real      
Soil Water mm H2O milliliter ratio   real      
Decomp Moisture Fact Moisture response function for microbial metabolism unitless dimensionless ratio   real      
Water Discharge m H2O yr-1 meter ratio   real      
Aqueous Soil NH4 NH4 concentration in soil water umol N L-1 microMolesPerLiter ratio   real      
Solid phase Soil NH4 NH4 sorbed to soil particles g N m-2 gramsPerSquareMeter ratio   real      
NH4 Leaching Loss gN m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Total Foliage Carbon gC m-2 gramsPerSquareMeter ratio   real      
Total Wood Carbon gC m-2 gramsPerSquareMeter ratio   real      
Total Root Carbon gC m-2 gramsPerSquareMeter ratio   real      
Total Foliage Nit. Total tissue N (labial plus structural) gN m-2 gramsPerSquareMeter ratio   real      
Total Wood Nit. Total tissue N (labial plus structural) gN m-2 gramsPerSquareMeter ratio   real      
Total Root Nit. Total tissue N (labial plus structural) gN m-2 gramsPerSquareMeter ratio   real      
Net Ecosys Prod. Net Ecosystem Production gC m-2 yr-1 gramsPerMeterSquaredPerYear ratio   real      
Evapotranspiration m H20 yr-1 meter ratio   real      

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