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• W2586412290 endingPage "94" @default.
• W2586412290 startingPage "80" @default.
• W2586412290 abstract "Understanding and predicting the ammonia (NH3) exchange between the biosphere and the atmosphere is important due to the environmental consequences of the presence of reactive nitrogen (Nr) in the environment. The dynamics of the natural sources are, however, not well understood, especially not for forest ecosystems due to the complex nature of this soil-vegetation-atmosphere system. Furthermore, the high reactivity of NH3 makes it technically complex and expensive to measure and understand the forest-atmospheric NH3 exchange. The aim of this study is to investigate the NH3 flux partitioning between the ground layer, cuticle and stomata compartments for two temperate deciduous forest ecosystems located in Midwestern, USA (MMSF) and in Denmark (DK-Sor). This study is based on measurements and simulations of the surface energy balance, fluxes of CO2 and NH3 during two contrasted periods of the forest ecosystems, a period with full developed canopy (MMSF) and a senescent period for the DK-Sor site, with leaf fall and leaf litter build-up. Both datasets indicate emissions of NH3 from the forest to the atmosphere. The two-layer NH3 compensation point model SURFATM-NH3 was used in combination with a coupled photosynthesis-stomatal conductance model to represent seasonal variation in canopy physiological activity for simulating both net ecosystem CO2 exchange rates (R2 = 0.77 for MMSF and R2 = 0.84 for DK-Sor) and atmospheric NH3 fluxes (R2 = 0.43 for MMSF and R2 = 0.60 for DK-Sor). A scaling of the ground layer NH3 emission potential (Гg) was successfully applied using the plant area index (PAI) to represent the build-up of a litter layer in the leaf fall period. For a closed green forest canopy (MMSF), unaffected by agricultural NH3 sources, NH3 was emitted with daytime fluxes up to 50 ng NH3-N m−2 s−1 and nighttime fluxes up to 30 ng NH3-N m−2 s−1. For a senescing forest (DK-Sor), located in an agricultural region, deposition rates of 250 ng NH3-N m−2 s−1 were measured prior to leaf fall, and emission rates up to 670 ng NH3-N m−2 s−1 were measured following leaf fall. For MMSF, simulated stomatal NH3 emissions explain the daytime flux observations well, and it is hypothesized that cuticular desorption is responsible for the observed NH3 emissions at night. During leaf fall in DK-Sor, ground fluxes dominate the NH3 flux with a mean emission rate of 150 ng NH3-N m−2 s−1. This study shows that forests potentially comprise a natural source of NH3 to the atmosphere, and that it is crucial to take into account the bi-directional exchange processes related to both the stomatal, cuticular and ground layer pathways in order to realistically simulate forest–atmosphere fluxes of NH3." @default.
• W2586412290 created "2017-02-17" @default.
• W2586412290 creator A5012927381 @default.
• W2586412290 creator A5036345856 @default.
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• W2586412290 creator A5070171778 @default.
• W2586412290 creator A5074195615 @default.
• W2586412290 creator A5082789132 @default.
• W2586412290 date "2017-05-01" @default.
• W2586412290 modified "2023-09-26" @default.
• W2586412290 title "Investigating sources of measured forest-atmosphere ammonia fluxes using two-layer bi-directional modelling" @default.
• W2586412290 cites W1257829631 @default.
• W2586412290 cites W1533654712 @default.
• W2586412290 cites W1604953148 @default.
• W2586412290 cites W1741463987 @default.
• W2586412290 cites W1902540584 @default.
• W2586412290 cites W1907660255 @default.
• W2586412290 cites W1971033665 @default.
• W2586412290 cites W1973543935 @default.
• W2586412290 cites W1977549017 @default.
• W2586412290 cites W1984770978 @default.
• W2586412290 cites W1985177249 @default.
• W2586412290 cites W1986802129 @default.
• W2586412290 cites W1991403317 @default.
• W2586412290 cites W2008596136 @default.
• W2586412290 cites W2010085525 @default.
• W2586412290 cites W2013579785 @default.
• W2586412290 cites W2014326738 @default.
• W2586412290 cites W2015633635 @default.
• W2586412290 cites W2017945600 @default.
• W2586412290 cites W2018760167 @default.
• W2586412290 cites W2020849466 @default.
• W2586412290 cites W2023790761 @default.
• W2586412290 cites W2029074727 @default.
• W2586412290 cites W2031756757 @default.
• W2586412290 cites W2032797598 @default.
• W2586412290 cites W2032981909 @default.
• W2586412290 cites W2042315169 @default.
• W2586412290 cites W2042672979 @default.
• W2586412290 cites W2044499383 @default.
• W2586412290 cites W2045325754 @default.
• W2586412290 cites W2046857879 @default.
• W2586412290 cites W2049216479 @default.
• W2586412290 cites W2050108825 @default.
• W2586412290 cites W2057474802 @default.
• W2586412290 cites W2062706622 @default.
• W2586412290 cites W2066186622 @default.
• W2586412290 cites W2066937753 @default.
• W2586412290 cites W2080809891 @default.
• W2586412290 cites W2081020662 @default.
• W2586412290 cites W2081973984 @default.
• W2586412290 cites W2083687085 @default.
• W2586412290 cites W2085037567 @default.
• W2586412290 cites W2086883902 @default.
• W2586412290 cites W2087623599 @default.
• W2586412290 cites W2088717257 @default.
• W2586412290 cites W2089940084 @default.
• W2586412290 cites W2091359725 @default.
• W2586412290 cites W2094547585 @default.
• W2586412290 cites W2096190218 @default.
• W2586412290 cites W2098921391 @default.
• W2586412290 cites W2101133253 @default.
• W2586412290 cites W2101360512 @default.
• W2586412290 cites W2103213004 @default.
• W2586412290 cites W2105080505 @default.
• W2586412290 cites W2107014913 @default.
• W2586412290 cites W2108671513 @default.
• W2586412290 cites W2114978454 @default.
• W2586412290 cites W2115905902 @default.
• W2586412290 cites W2117512922 @default.
• W2586412290 cites W2118003601 @default.
• W2586412290 cites W2118577649 @default.
• W2586412290 cites W2121566594 @default.
• W2586412290 cites W2121787597 @default.
• W2586412290 cites W2122817720 @default.
• W2586412290 cites W2124437404 @default.
• W2586412290 cites W2128342866 @default.
• W2586412290 cites W2128562122 @default.
• W2586412290 cites W2128989762 @default.
• W2586412290 cites W2129322530 @default.
• W2586412290 cites W2129789803 @default.
• W2586412290 cites W2131659791 @default.
• W2586412290 cites W2132464653 @default.
• W2586412290 cites W2134788338 @default.
• W2586412290 cites W2135948793 @default.
• W2586412290 cites W2138120705 @default.
• W2586412290 cites W2141519646 @default.
• W2586412290 cites W2151629240 @default.
• W2586412290 cites W2154755281 @default.
• W2586412290 cites W2159130038 @default.
• W2586412290 cites W2162624264 @default.
• W2586412290 cites W2164737092 @default.
• W2586412290 cites W2164791872 @default.
• W2586412290 cites W2169657599 @default.
• W2586412290 cites W2171659423 @default.
• W2586412290 cites W2211882165 @default.

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