English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. Using high-precision and centennial-resolution ice coreinformation on atmospheric nitrous oxide concentrations and its stablenitrogen and oxygen isotopic composition, we quantitatively reconstructchanges in the terrestrial and marine N2O emissions over the last21 000 years. Our reconstruction indicates that N2O emissions from landand ocean increased over the deglaciation largely in parallel by 1.7±0.3 and 0.7±0.3 TgN yr−1, respectively, relativeto the Last Glacial Maximum level. However, during the abrupt NorthernHemisphere warmings at the onset of the Bølling–Allerød warming and the end ofthe Younger Dryas, terrestrial emissions respond more rapidly to thenorthward shift in the Intertropical Convergence Zone connected to theresumption of the Atlantic Meridional Overturning Circulation. About 90 %of these large step increases were realized within 2 centuries at maximum.In contrast, marine emissions start to slowly increase already manycenturies before the rapid warmings, possibly connected to are-equilibration of subsurface oxygen in response to previous changes.Marine emissions decreased, concomitantly with changes in atmosphericCO2 and δ13C(CO2), at the onset of the terminationand remained minimal during the early phase of Heinrich Stadial 1. Duringthe early Holocene a slow decline in marine N2O emission of 0.4 TgN yr−1 is reconstructed, which suggests an improvement of subsurfacewater ventilation in line with slowly increasing Atlantic overturningcirculation. In the second half of the Holocene total emissions remain on arelatively constant level, but with significant millennial variability. Thelatter is still difficult to attribute to marine or terrestrial sources. OurN2O emission records provide important quantitative benchmarks forocean and terrestrial nitrogen cycle models to study the influence ofclimate on nitrogen turnover on timescales from several decades toglacial–interglacial changes.

biogeosciences

N&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O changes from the Last Glacial Maximum to the preindustrial – Part 1: Quantitative reconstruction of terrestrial and marine emissions using N&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O stable isotopes in ice cores