Simulated Hurricane Experiment - Trace Gas Fluxes and Soil N Dynamics

Data

• hf052-01: control plot
• hf052-02: blowdown plot

Overview

• Lead: Jerry Melillo, Richard Bowden
• Investigators: John Aber, Mark Castro, Paul Steudler
• Contact: Jerry Melillo
• Start date: 1989-08-01
• End date: 1991-12-31
• Location: Tom Swamp Tract (Harvard Forest)
• Latitude: +42.49
• Longitude: -72.20
• Elevation: 310 meters
• Taxa:
• Research topic: plot, soil
• Study type: short-term measurement
• LTER core area: inorganic nutrients, disturbance
• Keywords: hurricane, soil nitrogen, trace gas fluxes, wind damage
• Release date: 2000
• EML version: knb-lter-hfr.52.8
• Revisions:
• Related links:
• Abstract:

  This study examined the fluxes of greenhouse gases between soils and the atmosphere in the Simulated Hurricane Experiment. For details on methods and results, please see the published paper (Bowden, R., M. C. Castro, J. M. Melillo, P. A. Steudler and J. D. Aber. 1993. Fluxes of greenhouse gases between soils and the atmosphere in a temperate forest following a simulated hurricane blowdown. Biogeochemistry 21: 61-71.) The Abstract from the paper is reproduced below.

  "Fluxes of nitrous oxide (N2O), carbon dioxide (CO2), and methane (CH4) between soils and the atmosphere were measured monthly for one year in a 77-year-old temperate hardwood forest following a simulated hurricane blowdown. Emissions of CO2 and uptake of CH4 for the control plot were 4.92 MT C ha-1 y-1 and 3.87 kg C ha-1 y-1, respectively, and were not significantly different from the blowdown plot. Annual N2O emissions in the control plot (0.23 kg N ha-1 y-1) were low and were reduced 78% by the blowdown. Net N mineralization was not affected by the blowdown. Net nitrification was greater in the blowdown than in the control, however, the absolute rate of net nitrification, as well as the proportion of mineralized N that was nitrified, remained low. Fluxes of CO2 and CH4 were correlated positively to soil temperature, and CH4 uptake showed a negative relationship to soil moisture. Substantial resprouting and leafing out of downed or damaged trees, and increased growth of understory vegetation following the blowdown, were probably responsible for the relatively small differences in soil temperature, moisture, N availability, and net N mineralization and net nitrification between the control and blowdown plots, thus resulting in no change in CO2 or CH4 fluxes, and no increase in N2O emission."

• Methods:
• Use:

  This dataset is released to the public and may be freely downloaded. Please keep the designated Contact person informed of any plans to use the dataset. Consultation or collaboration with the original investigators is strongly encouraged. Publications and data products that make use of the dataset must include proper acknowledgement. For more information on LTER Network data access and use policies, please see: http://www.lternet.edu/data/netpolicy.html.

• Citation:

  Melillo J, Bowden R. 2000. Simulated Hurricane Experiment - Trace Gas Fluxes and Soil N Dynamics. Harvard Forest Data Archive: HF052.

Detailed Metadata

hf052-01: control plot

1. Date: date (YYMMDD)
2. Var: variable
   • n: number of samples
   • se: standard error
   • x: mean
3. N2O: N2O flux in ugN/m2/h (microgramsPerMeterSquaredPerHour )
4. CO2: CO2 flux in mgC/m2/h (milligramsPerMeterSquaredPerHour )
5. CH4: CH4 flux in mgC/m2/h (milligramsPerMeterSquaredPerHour )
6. SoilT-O: Soil temperature at 0-2.5 cm depth in degrees C (celsius )
7. SoilT-M: Soil temperature at 2.5-5.0 cm depth in degrees C (celsius )
8. AirT: air temperature (celsius )
9. SoilM-O: Soil moisture at 2.5-5.0 cm depth in gH2O/gSoil (gramsPerGram )
10. SoilM-M: Soil moisture at 2.5-5.0 cm depth in gH2O/gSoil (gramsPerGram )

hf052-02: blowdown plot

1. Date: date (YYMMDD)
2. Var: variable
   • n: number of samples
   • se: standard error
   • x: mean
3. N2O: N2O flux in ugN/m2/h (microgramsPerMeterSquaredPerHour )
4. CO2: CO2 flux in mgC/m2/h (milligramsPerMeterSquaredPerHour )
5. CH4: CH4 flux in mgC/m2/h (milligramsPerMeterSquaredPerHour )
6. SoilT-O: soil temperature at 0-2.5 cm depth (celsius )
7. SoilT-M: soil temperature at 2.5-5.0 cm depth (celsius )
8. AirT: air temperature (celsius )
9. SoilM-O: soil moisture at 0-2.5 cm depth in gH2O/gSoil (gramsPerGram )
10. SoilM-M: soil moisture at 2.5-5.0 cm depth in gH2O/gSoil (gramsPerGram )