Docstoc

Harwood

Document Sample
Harwood Powered By Docstoc
					A CTCD super-site for
terrestrial C dynamics
    Harwood, Northumberland


                 Collaborators:
Prof J Moncrieff, Dr M Mencuccini, Dr C Nichol
        School of GeoSciences, Edinburgh.
              Dr M Disney, UCL
Access/eddy flux tower
New instrumentation
Crane
Research Aircraft
                   SAGES

 Scottish Alliance for GeoScience, Environment
  and Society
 £6.5M from Scottish Executive, £2.2M to
  School of GeoSciences, Edinburgh.
 Technician, eddy covariance systems,
  spectroradiometers
               Management

 Dr Maurizio Mencuccini is Site Leader
   – Install and manage access tower
   – Install and manage canopy crane
   – Manage technical support and research
     access
   – Health and safety, training etc
                  Timeline
Activity   2006      2007    2008
Flux/
access
tower
Crane

Aircraft
(flux &
EO)
TDL

PRI

Soil
system
                  Summary

 A super-site to focus CTCD process research,
  flux measurements and EO science.
 An array of advanced instrumentation
 Technical support from University of Edinburgh
  and SAGES
 Clear management and access arrangements
       The future: Science Questions
 How strong is the carbon sink for different land
  surfaces?
 At what rates does the C in the organic matter break
  down?
 How is atmospheric [CO2] linked to surface fluxes?
 Can we quantify relationships between reflectance/C-
  uptake?
 Can we detect disturbance/age/management signal via
  EO?
 Can we detect photosynthetic stress/activity from
  space?
Canopy information from EO data
     Canopy information from EO data

 Aim:
   – stand-level structure & radiometric measurements to
     assess limits/potential of EO data, scale from leaf to
     canopy & point to landscape
 Progress:
   – NERC airborne acquisitions 2003/2004, 2006. Limited
     to 1 usable CHRIS scene
   – Spectral/structural measurements in 2003/2004/2005
   – Developed and extended 3D modelling methods &
     spruce structural model
     Canopy information from EO data


                                                            •‘Best’
                                                            available
                                                            CHRIS data

22/05/2004    18/07/2004   05/09/2004          13/05/2005


                                                •NERC airborne data: 2
                                                dates in 2003; none
                                                04/05; returning 06.
                                  500m pixel

13/07/2003   17/09/2003    Lidar: 15/06/2003
         Canopy information from EO data

                                                              •Successfully used detailed
                                                              3D canopy reflectance
                                                              models to predict EO signal
                                                              •Can see impact of changes
                                                              in structure for dense
                                                              (green) & sparse (red) forest
                                                              •Use historic Landsat data to
                                                              test at Harwood

                                 thinned                      •Couple with FR
                                                              management model


From Disney et al. (2006) Rem. Sens. Environ. 100, 114-132.
          Canopy information from EO data
 ‘Spectral invariant’ approach
   – Separate structural/spectral components &
      provide mapping from needle to canopy
   – Use 3D models to explore
 Express reflectance in simple parametric form 1,
  2, 3+ terms? E.g. 2 terms:


                              2 B2
            canopy  B1 
                            1  p0

         First order scattering   Higher order scattering


 B1, B2, po structural terms;  is radiometric term
  (needle single scattering albedo).
      Forward look: plans to Sept. 2007
 Canopy modelling:
   – 3D modelling of Sitka canopy at Harwood,
     testing against EO data, meas. needle 
   – Test spectral invariant approach
   – Coupling of 3D & FR management models




 Vegetation activity:
   – PRI sensors at Harwood & Griffin
   – Mount and test spectroradiometer at
     Harwood, Griffin + crane and towers
   – CHRIS & NERC Airborne acquisitions
   – Map PRI over Harwood in space/time +
     relate to fluxes
   – NCAVEO cal/val and FLEX activities

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:8
posted:3/8/2012
language:English
pages:16