Neglecting sinks for N<sub>2</sub>O at the earth's surface: does it matter?

Syakila, Alfi; Kroeze, Carolien; Slomp, Caroline P.

doi:10.1080/1943815x.2010.497492

Cited by 43 publications

(22 citation statements)

References 25 publications

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“…Here, we estimate the Earth's surface sink from a review of studies reporting on N 2 O uptake by terrestrial and aquatic systems (Kroeze et al, 2007;Syakila et al, 2010). N 2 O uptake has been reported for soils, aquatic systems and riparian zones.…”

Section: N 2 O Emissions From Oceansmentioning

confidence: 99%

“…They estimated that 8% of the global ice-free land area (10.8 million km 2 ) has a high likeliness of N 2 O uptake, and another 8% (10.8 million km 2 ) has a moderate likeliness of N 2 O uptake. From their literature review, it can be concluded that the observed N 2 O uptake may range from 0.01 to 10 µg N 2 O-N m −2 h −1 in areas acting as a sink (Table 2; Syakila et al, 2010). We used this information to explore the implications for the global budget.…”

Section: N 2 O Emissions From Oceansmentioning

confidence: 99%

“…As a result, soils and sediments can be net sinks of N 2 O. Some recent studies discuss the possibility of a surface sink of N 2 O (Chapuis- Lardy et al, 2007;Kroeze et al, 2007;Syakila et al, 2010). These studies indicate that there is potentially a considerable amount of uptake of N 2 O at the Earth's surface.…”

Section: Introductionmentioning

confidence: 99%

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The global nitrous oxide budget revisited

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Section: N 2 O Emissions From Oceansmentioning

confidence: 99%

Section: N 2 O Emissions From Oceansmentioning

confidence: 99%

See 1 more Smart Citation

The global nitrous oxide budget revisited

Syakila

Kroeze

2011

Greenhouse Gas Measurement and Management

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519

328

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“…Industry (especially nylon production) and fossil fuel combustion present a smaller contribution to the anthropogenic source (Davidson, 2009;Kroeze et al, 1999;Mosier et al, 1998). N 2 O is primarily destroyed in the stratosphere via UV photolysis (90 %) and reactions with excited oxygen atoms (10 %) (Minschwaner et al, 1993), with a minor N 2 O fraction removed by surface sinks (Syakila et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Constraining N<sub>2</sub>O emissions since 1940 using firn air isotope measurements in both hemispheres

et al. 2017

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Abstract. N 2 O is currently the third most important anthropogenic greenhouse gas in terms of radiative forcing and its atmospheric mole fraction is rising steadily. To quantify the growth rate and its causes over the past decades, we performed a multi-site reconstruction of the atmospheric N 2 O mole fraction and isotopic composition using new and previously published firn air data collected from Greenland and Antarctica in combination with a firn diffusion and densification model. The multi-site reconstruction showed that while the global mean N 2 O mole fraction increased from (290 ± 1) nmol mol −1 in 1940 to (322 ± 1) nmol mol −1 in 2008, the isotopic composition of atmospheric N 2 O decreased by (−2.2 ± 0.2) ‰ for δ 15 N av , (−1.0 ± 0.3) ‰ for δ 18 O, (−1.3 ± 0.6) ‰ for δ 15 N α , and (−2.8 ± 0.6) ‰ for δ 15 N β over the same period. The detailed temporal evolution of the mole fraction and isotopic composition derived from the firn air model was then used in a two-box atmospheric model (comprising a stratospheric box and a tropospheric box) to infer changes in the isotopic source signature over time. The precise value of the source strength depends on the choice of the N 2 O lifetime, which we choose to fix at 123 years. The average isotopic composition over the investigated period is δ 15 N av = (−7.6 ± 0.8) ‰ (vs. air-N 2 ), δ 18 O = (32.2 ± 0.2) ‰ (vs. Vienna Standard Mean Ocean Water -VSMOW) for δ 18 O, δ 15 N α = (−3.0 ± 1.9) ‰ and δ 15 N β = (−11.7 ± 2.3) ‰. δ 15 N av , and δ 15 N β show some temporal variability, while for the other signatures the error bars of the reconstruction are too large to retrieve reliable temporal changes. Possible processes that may explain trends in 15 N are discussed. The 15 N site preference (= δ 15 N α − δ 15 N β ) provides evidence of a shift in emissions from denitrification to nitrification, although the uncertainty envelopes are large.

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“…N 2 O uptake has often been observed in field studies, especially in boreal regions based on a summary provided by Syakila et al . [], and such data have been rejected as analytical errors or artifacts. However, Welti et al .…”

Section: Discussionmentioning

confidence: 99%

Process‐based TRIPLEX‐GHG model for simulating N₂O emissions from global forests and grasslands: Model development and evaluation

Zhang

Peng

Wang

et al. 2017

J Adv Model Earth Syst

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The development of the new process‐based TRIPLEX‐GHG model derives from the Integrated Biosphere Simulator (IBIS), which couples nitrification and denitrification processes to quantify nitrous oxide (N2O) emissions from natural forests and grasslands. Sensitivity analysis indicates that the nitrification rate coefficient (COENR) is the most sensitive parameter to simulate N2O emissions. Accordingly, we calibrated this parameter using data from 29 global forest sites (across different latitudes) and grassland sites. The average nitrification rate coefficient gradually increases in the order of tropical forest to grassland to temperate forest to boreal forest, and giving means of 0.009, 0.03, 0.04, and 0.09, respectively. This study validated the mean value for each ecosystem at 52 sites globally. Calibration results both indicate the good performance of the model and its suitability in capturing seasonal variation and magnitude of N2O flux; however, it is limited in modeling N2O uptake and increments during periods of snowmelt. Additionally, validation results indicate that simulated and observed annual or seasonal N2O fluxes are highly correlated (R2 = 0.75; P < 0.01). Consequently, our results suggest that the model is suitable in simulating N2O emissions from different forest and grassland land types under varying environmental conditions on a global scale.

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Neglecting sinks for N₂O at the earth's surface: does it matter?

Cited by 43 publications

References 25 publications

The global nitrous oxide budget revisited

The global nitrous oxide budget revisited

Constraining N<sub>2</sub>O emissions since 1940 using firn air isotope measurements in both hemispheres

Process‐based TRIPLEX‐GHG model for simulating N₂O emissions from global forests and grasslands: Model development and evaluation

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Neglecting sinks for N2O at the earth's surface: does it matter?

Cited by 43 publications

References 25 publications

The global nitrous oxide budget revisited

The global nitrous oxide budget revisited

Constraining N&lt;sub&gt;2&lt;/sub&gt;O emissions since 1940 using firn air isotope measurements in both hemispheres

Process‐based TRIPLEX‐GHG model for simulating N2O emissions from global forests and grasslands: Model development and evaluation

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Neglecting sinks for N₂O at the earth's surface: does it matter?

Constraining N<sub>2</sub>O emissions since 1940 using firn air isotope measurements in both hemispheres

Process‐based TRIPLEX‐GHG model for simulating N₂O emissions from global forests and grasslands: Model development and evaluation