0000000000646315
AUTHOR
Kari Minkkinen
showing 4 related works from this author
Soiden ennallistamisen suoluonto-, vesistö-, ja ilmastovaikutukset. Vertaisarvioitu raportti.
2021
Tämän selvityksen tarkoituksena on tuottaa kirjallisuuskatsaus ja siihen pohjautuvia johtopäätöksiä soiden ennallistamisen ilmasto-, vesistö- ja suoluontovaikutuksista. Selvitys pyrkii erityisesti kasaamaan yhteen uusimpia tutkimustuloksia ja aineistoja ennallistamisen vaikutuksiin liittyen ja toisaalta muodostamaan kokonaiskuvan laaja-alaisempaa soiden ennallistamisstrategiaa silmällä pitäen. Suoekosysteemit reagoivat kokonai-suutena varsin hyvin perinteisiin ennallistamistoimiin. Ennallistaminen ei kuitenkaan ole ongelmatonta, sillä ennallistamistoimet eli yleensä kaivin- ja metsäkonetyöt sekä ennallistamisen jälkeisen alkuvaiheen voimakkaat ekosysteemin muutokset voivat aiheuttaa yhteisk…
Nitrous oxide emission budgets and land-use-driven hotspots for organic soils in Europe
2014
Organic soils are a main source of direct emissions of nitrous oxide (N2O), an important greenhouse gas (GHG). Observed N2O emissions from organic soils are highly variable in space and time, which causes high uncertainties in national emission inventories. Those uncertainties could be reduced when relating the upscaling process to a priori-identified key drivers by using available N2O observations from plot scale in empirical approaches. We used the empirical fuzzy modelling approach MODE to identify main drivers for N2O and utilize them to predict the spatial emission pattern of European organic soils. We conducted a meta-study with a total amount of 659 annual N2O measurements, which was…
A synthesis of methane emissions from 71 northern, temperate, and subtropical wetlands
2014
Wetlands are the largest natural source of atmospheric methane. Here, we assess controls on methane flux using a database of approximately 19 000 instantaneous measurements from 71 wetland sites located across subtropical, temperate, and northern high latitude regions. Our analyses confirm general controls on wetland methane emissions from soil temperature, water table, and vegetation, but also show that these relationships are modified depending on wetland type (bog, fen, or swamp), region (subarctic to temperate), and disturbance. Fen methane flux was more sensitive to vegetation and less sensitive to temperature than bog or swamp fluxes. The optimal water table for methane flux was consi…
Nitrous oxide emission hotspots from organic soils in Europe
2014
Abstract. Organic soils are a main source of direct nitrous oxide (N2O) emissions, an important greenhouse gas (GHG). Observed N2O emissions from organic soils are highly variable in space and time which causes high uncertainties in national emission inventories. Those uncertainties could be reduced when relating the upscaling process to a priori identified key drivers by using available N2O observations from plot scale in empirical approaches. We used the empirical fuzzy modelling approach MODE to identify main drivers for N2O and utilize them to predict the spatial emission pattern of European organic soils. We conducted a meta study with a total amount of 659 annual N2O measurements whic…