Focus

Senegal: Dahra

Latitude: 15.402828
Longitude: -15.432283

Network: CarboAfrica
Principal investigator: Torbern Tagesson
PI-affiliated institution: University of Copenhagen
Primary IGBP ecosystem type: Savannas
Dominant plant functional type: Grass
Recent and historic disturbance and management events that may affect this site:
- Drought: Prolonged water deficiency; hydrologic or climatic drought
- Fire: Wildfire or managed burns
- Grazing: Herbivory or browsing by mammals, managed or wild
- Temperature extreme: Heat wave or freeze
Flux data collection:
- Start date: August 2010
- End date: Ongoing
Flux methods:
- Eddy covariance, gradients,
Optical data collection:
- Start date: July 2011
- End date: Ongoing
Data collection period: Continuous operation: Variable collected continuously with the reported method.
Data scale: Stand
Collection methods: Tower
Types of data collected: Albedo (Incoming and outoging short wave radiation), fAPAR (Incoming, outgoing and transmitted PAR), fIPAR (Incoming, outgoing and transmitted PAR), NDVI (Hemishpherical, 25Âº FOV, and 60ÂºVOF, pointing Nadir,and at 15 and 45Âº east and west), PAR (Incoming, outgoing and transmitted PAR), PRI (at 12.5 m height hemispherical incoming and with 25Âº FOV at nadir), Relative humidity (At 2, 5, 9 and 12 m height), Spectral reflectance (ASD 350-1800 nm), Canopy temperature (Destructive biomass sampling), Leaf temperature (Raytek and Apogee sensors)
Publications

- Tagesson T, Fensholt R, Guiro I, Rasmussen MO, Huber S, Mbow C, Garcia M, Horion S, Sandholt I, Holm‐Rasmussen B, Göttsche FM. Ecosystem properties of semiarid savanna grassland in West Africa and its relationship with environmental variability. Global change biology. 2015 Jan;21(1):250-64.
- Tagesson T, Fensholt R, Huber S, Horion S, Guiro I, Ehammer A, Ardö J. Deriving seasonal dynamics in ecosystem properties of semi-arid savanna grasslands from in situ-based hyperspectral reflectance. Biogeosciences. 2015 Aug 5;12(15):4621-35.
- Huber S, Tagesson T, Fensholt R. An automated field spectrometer system for studying VIS, NIR and SWIR anisotropy for semi-arid savanna. Remote Sensing of Environment. 2014 Sep 1;152:547-56.
- Tagesson T, Fensholt R, Cropley F, Guiro I, Horion S, Ehammer A, Ardö J. Dynamics in carbon exchange fluxes for a grazed semi-arid savanna ecosystem in West Africa. Agriculture, Ecosystems & Environment. 2015 Jul 1;205:15-24.