Spatial and temporal variation in vegetation land cover albedo in Finland
Surface albedo, which is the fraction of reflected radiant energy by earth’s surface to incoming solar energy, plays an important role in earth energy budget and energy equilibrium. Different features of the earth’s surface have different reflectivity rates which affect the albedo. Vegetation land-c...
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Helsingfors universitet
2015
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/156106 2024-09-15T18:25:43+00:00 Spatial and temporal variation in vegetation land cover albedo in Finland Safdari, Pezhman Helsingin yliopisto, Maatalous-metsätieteellinen tiedekunta, Metsätieteiden laitos University of Helsinki, Faculty of Agriculture and Forestry, Department of Forest Sciences Helsingfors universitet, Agrikultur- och forstvetenskapliga fakulteten, Institutionen för skogsvetenskaper 2015 http://hdl.handle.net/10138/156106 eng eng Helsingfors universitet University of Helsinki Helsingin yliopisto URN:NBN:fi:hulib-201508103449 http://hdl.handle.net/10138/156106 Surface Albedo vegetation land-cover Boreal zone vegetation classes growing season Skoglig ekologi och resurshushållning Forest Ecology and Management Metsien ekologia ja käyttö pro gradu-avhandlingar pro gradu -tutkielmat master's thesis 2015 ftunivhelsihelda 2024-07-04T04:52:38Z Surface albedo, which is the fraction of reflected radiant energy by earth’s surface to incoming solar energy, plays an important role in earth energy budget and energy equilibrium. Different features of the earth’s surface have different reflectivity rates which affect the albedo. Vegetation land-covers covering vast areas of earth’s surface as agricultural lands, forests, grass lands and so on, have great impact on land surface albedo. The Species composition, geographical distribution and seasonal phenology of different vegetation land-covers have an impact on surface albedo and consequently on earth’s energy budget and consequently, on climate change. Boreal zone covering latitudes between 60o – 70o N is one of the largest vegetation biomes on earth and which has a significant impact on surface albedo. The boreal region is mostly covered by coniferous forests which are optically very dark and absorb most of the incoming solar energy. This low reflectivity is very influential during the times that earth’s surface is snow covered by masking the high reflectivity of the snow covered land surface. This has caused most of the studies to focus on the boreal vegetation land-cover albedo during the snow covered periods of the year. In this study, the effect of five different vegetation classes (agriculture, broad leaves, coniferous, mixed forest and shrub lands) and the latitudinal gradient (northern, middle and southern Finland) and the vegetation phenology during the growing season on surface albedo of vegetated areas of Finland for the year 2009 has been investigated. The results of the study showed that there is a significant difference between the albedo of different vegetation land-cover classes. The albedo of agricultural lands tends to be systematically the highest in all conditions while conifers were the lowest. The vegetation land-cover albedo is generally lower in northern Finland compared to middle and south. There is a gradual increase in vegetation albedo until mid-July and after reaching a maximum ... Master Thesis Northern Finland HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Surface Albedo vegetation land-cover Boreal zone vegetation classes growing season Skoglig ekologi och resurshushållning Forest Ecology and Management Metsien ekologia ja käyttö |
spellingShingle |
Surface Albedo vegetation land-cover Boreal zone vegetation classes growing season Skoglig ekologi och resurshushållning Forest Ecology and Management Metsien ekologia ja käyttö Safdari, Pezhman Spatial and temporal variation in vegetation land cover albedo in Finland |
topic_facet |
Surface Albedo vegetation land-cover Boreal zone vegetation classes growing season Skoglig ekologi och resurshushållning Forest Ecology and Management Metsien ekologia ja käyttö |
description |
Surface albedo, which is the fraction of reflected radiant energy by earth’s surface to incoming solar energy, plays an important role in earth energy budget and energy equilibrium. Different features of the earth’s surface have different reflectivity rates which affect the albedo. Vegetation land-covers covering vast areas of earth’s surface as agricultural lands, forests, grass lands and so on, have great impact on land surface albedo. The Species composition, geographical distribution and seasonal phenology of different vegetation land-covers have an impact on surface albedo and consequently on earth’s energy budget and consequently, on climate change. Boreal zone covering latitudes between 60o – 70o N is one of the largest vegetation biomes on earth and which has a significant impact on surface albedo. The boreal region is mostly covered by coniferous forests which are optically very dark and absorb most of the incoming solar energy. This low reflectivity is very influential during the times that earth’s surface is snow covered by masking the high reflectivity of the snow covered land surface. This has caused most of the studies to focus on the boreal vegetation land-cover albedo during the snow covered periods of the year. In this study, the effect of five different vegetation classes (agriculture, broad leaves, coniferous, mixed forest and shrub lands) and the latitudinal gradient (northern, middle and southern Finland) and the vegetation phenology during the growing season on surface albedo of vegetated areas of Finland for the year 2009 has been investigated. The results of the study showed that there is a significant difference between the albedo of different vegetation land-cover classes. The albedo of agricultural lands tends to be systematically the highest in all conditions while conifers were the lowest. The vegetation land-cover albedo is generally lower in northern Finland compared to middle and south. There is a gradual increase in vegetation albedo until mid-July and after reaching a maximum ... |
author2 |
Helsingin yliopisto, Maatalous-metsätieteellinen tiedekunta, Metsätieteiden laitos University of Helsinki, Faculty of Agriculture and Forestry, Department of Forest Sciences Helsingfors universitet, Agrikultur- och forstvetenskapliga fakulteten, Institutionen för skogsvetenskaper |
format |
Master Thesis |
author |
Safdari, Pezhman |
author_facet |
Safdari, Pezhman |
author_sort |
Safdari, Pezhman |
title |
Spatial and temporal variation in vegetation land cover albedo in Finland |
title_short |
Spatial and temporal variation in vegetation land cover albedo in Finland |
title_full |
Spatial and temporal variation in vegetation land cover albedo in Finland |
title_fullStr |
Spatial and temporal variation in vegetation land cover albedo in Finland |
title_full_unstemmed |
Spatial and temporal variation in vegetation land cover albedo in Finland |
title_sort |
spatial and temporal variation in vegetation land cover albedo in finland |
publisher |
Helsingfors universitet |
publishDate |
2015 |
url |
http://hdl.handle.net/10138/156106 |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_relation |
URN:NBN:fi:hulib-201508103449 http://hdl.handle.net/10138/156106 |
_version_ |
1810466210640297984 |