Abstract
Scotch pine (pinus sylvestris L.) needles were photographed in the field as well as macro- and microscopically to kodak high speed infrared 2481-film using a red filter. The method of image interpreting was based on the graininess due to different reflection values of the objects. The needles were also observed with SEM and light microscope and the concentrations of nitrogen, a- and {beta}-chlorophylls, carotenoids and water were measured. A small scale mapping of epiphytic lichens was made in the area. The concentrations of ozone, SO{sub 2} and NO{sub x} in the air were measured 19.06.- 22.08.1990. According to the field images the infrared reflection of the pines reduced when approaching the highway although the trees visually looked the same. Field and macro scale images indicated the not wintered needle year reflect always at least as much infrared radiation as the wintered one. According to microscope images cuticle and mesophyll cell walls absorbed infrared radiation. The concentration of ozone in the air can cause the disappearance of stomachal wax layer that was observed. Also the concentrations of sulphur dioxide and nitrogen oxides were higher than those of the background stations. The mapping of lichens indicated the air quality to become better
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Citation Formats
Heikkilae, O.
IR-photography for conifer damage assessment. Method study in traffic environment; Ilman epaepuhtauksen vaikutuksen arvioiminen infrapunavalokuvauksen avulla. Menetelmaetutkimus maennyn neulasilla liikenneympaeristoessae.
Finland: N. p.,
1991.
Web.
Heikkilae, O.
IR-photography for conifer damage assessment. Method study in traffic environment; Ilman epaepuhtauksen vaikutuksen arvioiminen infrapunavalokuvauksen avulla. Menetelmaetutkimus maennyn neulasilla liikenneympaeristoessae.
Finland.
Heikkilae, O.
1991.
"IR-photography for conifer damage assessment. Method study in traffic environment; Ilman epaepuhtauksen vaikutuksen arvioiminen infrapunavalokuvauksen avulla. Menetelmaetutkimus maennyn neulasilla liikenneympaeristoessae."
Finland.
@misc{etde_10121179,
title = {IR-photography for conifer damage assessment. Method study in traffic environment; Ilman epaepuhtauksen vaikutuksen arvioiminen infrapunavalokuvauksen avulla. Menetelmaetutkimus maennyn neulasilla liikenneympaeristoessae}
author = {Heikkilae, O}
abstractNote = {Scotch pine (pinus sylvestris L.) needles were photographed in the field as well as macro- and microscopically to kodak high speed infrared 2481-film using a red filter. The method of image interpreting was based on the graininess due to different reflection values of the objects. The needles were also observed with SEM and light microscope and the concentrations of nitrogen, a- and {beta}-chlorophylls, carotenoids and water were measured. A small scale mapping of epiphytic lichens was made in the area. The concentrations of ozone, SO{sub 2} and NO{sub x} in the air were measured 19.06.- 22.08.1990. According to the field images the infrared reflection of the pines reduced when approaching the highway although the trees visually looked the same. Field and macro scale images indicated the not wintered needle year reflect always at least as much infrared radiation as the wintered one. According to microscope images cuticle and mesophyll cell walls absorbed infrared radiation. The concentration of ozone in the air can cause the disappearance of stomachal wax layer that was observed. Also the concentrations of sulphur dioxide and nitrogen oxides were higher than those of the background stations. The mapping of lichens indicated the air quality to become better in the distance of 250 m or more from the highway. Also the erosion of the needle wax structure decreased when drawing farther away. The water content of the 1989 needles decreased when approaching the highway.}
place = {Finland}
year = {1991}
month = {Dec}
}
title = {IR-photography for conifer damage assessment. Method study in traffic environment; Ilman epaepuhtauksen vaikutuksen arvioiminen infrapunavalokuvauksen avulla. Menetelmaetutkimus maennyn neulasilla liikenneympaeristoessae}
author = {Heikkilae, O}
abstractNote = {Scotch pine (pinus sylvestris L.) needles were photographed in the field as well as macro- and microscopically to kodak high speed infrared 2481-film using a red filter. The method of image interpreting was based on the graininess due to different reflection values of the objects. The needles were also observed with SEM and light microscope and the concentrations of nitrogen, a- and {beta}-chlorophylls, carotenoids and water were measured. A small scale mapping of epiphytic lichens was made in the area. The concentrations of ozone, SO{sub 2} and NO{sub x} in the air were measured 19.06.- 22.08.1990. According to the field images the infrared reflection of the pines reduced when approaching the highway although the trees visually looked the same. Field and macro scale images indicated the not wintered needle year reflect always at least as much infrared radiation as the wintered one. According to microscope images cuticle and mesophyll cell walls absorbed infrared radiation. The concentration of ozone in the air can cause the disappearance of stomachal wax layer that was observed. Also the concentrations of sulphur dioxide and nitrogen oxides were higher than those of the background stations. The mapping of lichens indicated the air quality to become better in the distance of 250 m or more from the highway. Also the erosion of the needle wax structure decreased when drawing farther away. The water content of the 1989 needles decreased when approaching the highway.}
place = {Finland}
year = {1991}
month = {Dec}
}