Počet záznamů: 1  

Multidecadal analysis of forest growth and albedo in boreal Finland

  1. 1.
    SYSNO ASEP0461647
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevMultidecadal analysis of forest growth and albedo in boreal Finland
    Tvůrce(i) Lukeš, Petr (UEK-B) ORCID, SAI, RID
    Stenberg, P. (FI)
    Mottus, M. (FI)
    Manninen, T. (FI)
    Rautiainen, M. (FI)
    Zdroj.dok.International Journal of Applied Earth Observation and Geoinformation. - : Elsevier - ISSN 0303-2434
    Roč. 52, OCT (2016), s. 296-305
    Poč.str.10 s.
    Jazyk dok.eng - angličtina
    Země vyd.NL - Nizozemsko
    Klíč. slovaAlbedo ; fAPAR ; LAI ; NDVI ; Time series ; Seasonal trends ; Forest structure
    Vědní obor RIVEH - Ekologie - společenstva
    CEPLM2010007 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
    LO1415 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
    Výzkumná infrastrukturaCzeCOS II - 90061 - Ústav výzkumu globální změny AV ČR, v. v. i.
    Institucionální podporaRVO:67179843 - RVO:67179843
    UT WOS000383003500027
    EID SCOPUS84997840804
    DOI10.1016/j.jag.2016.07.001
    AnotaceIt is well known that forests serve as carbon sinks. In the last 30 years, there has been a steady increase in the growing stock of Finnish forests by nearly a quarter while the area of the forests has remained virtually unchanged. Such increase in forest density together with the availability of detailed forest inventories provided by the Multi-Source National Forest Inventory (MS-NFI) in high spatial resolution makes Finland an ideal candidate for exploring the effects of increased forest density on satellite derived estimates of bio-geochemical products e.g. albedo (directional-hemispherical reflectance, DHR), fraction of photosynthetically active radiation absorbed by canopies (fAPAR), leaf area index (LAI) and normalized difference vegetation index (NDVI) in both current and long-term perspective. In this study, we first used MODIS-based vegetation satellite products for Finnish forests to study their seasonal patterns and interrelations. Next, the peak growing season observations are linked to the MS-NFI database to yield the generic relationships between forest density and the satellite-derived vegetation indicators. Finally, long-term GIMMS3g datasets between 1982 and 2011 (2008 for DHR) are analyzed and interpreted using forest inventory data. The vegetation peak growing season NIR DHR and VIS DHR showed weak to moderate negative correlation with fAPAR, whereas there was no correlation between NIR DHR and fAPAR. Next, we show that the spectral albedos in the near-infrared region (NIR DHR) showed weak negative correlation with forest biomass, basal area or canopy cover whereas, as expected, the spectral albedo in the visible region (VIS DHR) correlated negatively with these measures of forest density. Interestingly, the increase in forest density (biomass per ha) of Finnish forests during the last 30 years was not accompanied by trends in the indicators of vegetation ‘greenness’ and photosynthetic productivity (fAPAR, LAI and NDVI) or in forest albedo (DHR).
    PracovištěÚstav výzkumu globální změny
    KontaktNikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268
    Rok sběru2017
Počet záznamů: 1  

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