1
Q
Ecological climatology:
A
2
Q
Ecoclimatological perspective:
A
3
Q
Land surface models:
A
4
Q
Which radiative fluxes do we find in plant stands?
A
5
Q
Where in a plant stand is the radiation balance greatest?
A
- temperature, evapotranspiration
- regional climate, water balance latent heat flux sensible heat flux plant heat flux
- understanding the radiation balance
- deriving all other parameters
6
Q
Radiation and leaves:
A
7
Q
„Light extinction“
A
8
Q
Radiation and thinning:
A
9
Q
Radiation and canopy:
A
10
Q
Radiation and leaves:
A
11
Q
Diurnal course of PAR at 4 measuring points of a sun branch of Picea abie:
A
12
Q
Radiation and canopy:
A
13
Q
Strahlung an Waldränder:
A
- outer fringe: “darkened” with influence from the stand
- inner fringe: “brightened” with influence from the open field
- contrasts greater in full sunshine than in overcast conditions
- exposure of forest edge important
14
Q
Radiation at forest edges:
A
- important, because of special microclimate
- favorable for natural regeneration and crops (protection against wind, temperature extremes)
- forest edge = transitional climate
15
Q
Radiation in gaps:
A
16
Q
Variability of shortwave radiation fluxes:
A
- very high spatial (horizontal and vertical) and temporal variability due to uneven structure of the canopy ⇒ light and shadow spots (sunflecks and shaded areas)
- depending on stand treatment (clear-cutting, different canopy positions (degree of canopy cover), strong - weak thinning (basal area), control as well as cloud cover)
- differences with slope inclination and direction, exposure
17
Q
Objectives:
A
- Quantitative and qualitative investigation of short-wave ecologically and actinically relevant radiation fluxes in forests
- Development of a radiative transfer model for forest stands
- Input for flux-based ozone risk assessment model
- Input for forest growth model (BALANCE)
- Input for hydrological model (WaSiM)
- Mapping of phenology
- Spectral data for remote sensing ⇒ ground truth
18
Q
Spektrale Strahlungsverteilung im Waldbestand:
A
- vertical distribution of PAR
19
Q
Sunflecks:
A
- vertical distribution of sunflecks, penumbra and umbra
20
Q
Spectral radiation distribution in the forest stand:
A
- probability density functions
21
Q
Spectral radiation distribution in the forest stand:
A
- relationship between light quality and availability (quantity)
- PAR and R/FR
22
Q
Strahlung und Sonnenhöhe:
A
- solar elevation and cloudiness
23
Q
Radiation and structure:
A
- spectral ratios and structure
24
Q
Radiation and structure:
A
- LAI and R/FR
25
***Radiation and leaf size:***
26
***Modeling radiative transport in forest stands:***
27
***Phenological stages:***
28
***Phenological stages:***
29
***Ozone risk assessment:***
30
***Growth modeling ⇒ carbon budget:***
31
***Ozone risk assessment:***
32
***Radiation and photosynthesis:***
