1 / 13

The contribution of hydrological fluxes to carbon sequestration in a temperate forest plantation

Kate Heal , Nick Forrest, Paul Jarvis School of GeoSciences The University of Edinburgh Xiangqing Ma Fujian Agriculture and Forestry University, China. The contribution of hydrological fluxes to carbon sequestration in a temperate forest plantation. Research question.

evania
Download Presentation

The contribution of hydrological fluxes to carbon sequestration in a temperate forest plantation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Kate Heal, Nick Forrest, Paul Jarvis School of GeoSciences The University of Edinburgh Xiangqing Ma Fujian Agriculture and Forestry University, China The contribution of hydrological fluxes to carbon sequestration in a temperate forest plantation

  2. Research question Proportion of C sequestered by forest ecosystems lost in water flux?

  3. Study site: Griffin Forest (56.6oN, 3.8oE) • Catchment area 4.5 km2 • Dalradian schist overlain by humic gley/ stagnohumic gley soils • Sitka spruce forest planted 1980-1981 Edinburgh

  4. Field measurements of hydrological flux April-December 2000 Storage raingauges x 5 Logging raingauges x 2 Throughfall & stemflow samplers x 24 trees Cloudwater gauges x 2 www.met-office.gov.uk

  5. P<0.001

  6. CO2 flux (eddy covariance) • Movement of air parcels measured in 3 dimensions using a sonic anemometer • Air analysis with IRGA => flux of CO2 calculated • Other micrometeorological measurements to check energy balance and calculate evapotranspiration www.eastmain1.org/en/measuring-CO2-emissions.html

  7. in 2000

  8. Annual evapotranspiration estimates 2000 • Catchment water balance method: E = precipitation – streamflow • Eddy covariance:

  9. Estimates of evapotranspiration by different methods show close agreement • Catchment water balance closure within uncertainties => Confidence in measurements of hydrological fluxes

  10. Mean values; bars show max and min values Summary of chemical concentrations 236 254 231 212

  11. DOC vs flow relationship DOC flushed from organic near-surface soil horizons at high flows P=0.001

  12. Impact of C loss in river on net C sequestration

  13. Interaction between catchment C and N fluxes • 73% of atmospheric N input removed by canopy • C sequestration per unit added N (ΔC:ΔN) • c.170 in 2000 at Griffin • 210 (Magnani et al., 2007) • 25 (De Vries et al., 2006) www.whrc.org • New NERC-funded project • BACIP design with 2 adjacent sub-catchments • 1 year before • 4 years after: treatment with 40 kg N ha-1 yr-1 • (NH4NO3 4 x year, minimise water volume) • Calculate ecosystem and catchment ΔC:ΔN

More Related