Thomas Holst
Researcher
Radiation components of beech stands in Southwest Germany
Author
Summary, in English
Within the framework of an interdisciplinary project on the impact of climate and forest management on
beech dominated deciduous forests, forest meteorological measurements are carried out within and above
different beech stands (Fagus sylvatica L.) on opposite slopes of a narrow valley located in the Swabian
Jura mountain range (south-west Germany). Referring to test plots on both slopes, the following cycles of
radiation components are discussed: (1) Monthly mean values of transmission and extinction of global solar
irradiance, photosynthetically active radiation as well as UV-A and UV-B radiation through the canopy, (2)
diurnal courses of surface albedo α, net short-wave radiation K*, net long-wave radiation L* and net all-wave
radiation Q* for a cloudless day in March (leafless period) and a cloudless day in July (fully-leaved period)
above and below the canopy of different beech stands, and (3) monthly mean values of α, K*, L* and Q* for
the same stand conditions as for (2). The results point out the combined impact on the investigated radiation
components emanating from seasonally variable canopy density (quantified by the plant area index), exposure
and sun elevation.
beech dominated deciduous forests, forest meteorological measurements are carried out within and above
different beech stands (Fagus sylvatica L.) on opposite slopes of a narrow valley located in the Swabian
Jura mountain range (south-west Germany). Referring to test plots on both slopes, the following cycles of
radiation components are discussed: (1) Monthly mean values of transmission and extinction of global solar
irradiance, photosynthetically active radiation as well as UV-A and UV-B radiation through the canopy, (2)
diurnal courses of surface albedo α, net short-wave radiation K*, net long-wave radiation L* and net all-wave
radiation Q* for a cloudless day in March (leafless period) and a cloudless day in July (fully-leaved period)
above and below the canopy of different beech stands, and (3) monthly mean values of α, K*, L* and Q* for
the same stand conditions as for (2). The results point out the combined impact on the investigated radiation
components emanating from seasonally variable canopy density (quantified by the plant area index), exposure
and sun elevation.
Publishing year
2005
Language
English
Pages
107-115
Publication/Series
Meteorologische Zeitschrift
Volume
14
Issue
2
Document type
Journal article
Publisher
E Schweizerbartsche Verlags
Topic
- Physical Geography
Status
Published
ISBN/ISSN/Other
- ISSN: 1610-1227