N2O changes from the Last Glacial Maximum to the preindustrial – Part 1: Quantitative reconstruction of terrestrial and marine emissions using N2O stable isotopes in ice cores
N2O changes from the Last Glacial Maximum to the preindustrial – Part 1: Quantitative reconstruction of terrestrial and marine emissions using N2O stable isotopes in ice cores
复制标题
N2O 从末次盛冰期到工业化前的变化 – 第 1 部分：使用冰芯中的 N2O 稳定同位素定量重建陆地和海洋排放
作者：
H. Fischer;J. Schmitt;M. Bock;B. Seth;F. Joos;R. Spahni;Sebastian Lienert;G. Battaglia;B. Stocker;A. Schilt;E. Brook
抽象的。利用高精度和百年分辨率的冰芯
关于大气中一氧化二氮浓度及其稳定浓度的资料
氮和氧同位素组成，我们定量重建
过去一年陆地和海洋N2 O排放量的变化
21000年。我们的重建表明陆地上的N2 O排放
和海洋在冰消期的增加主要是平行的，分别为1.7±0.3和0.7±0.3 TgN yr−1，相对
末次冰期最高水位然而，在突然的北方
Bølling-Allerød变暖开始时的半球变暖和
在新仙女木时期，陆地排放物对大气的响应速度更快，
北移在热带辐合带连接到
大西洋经向翻转环流的恢复。大约90%
这些大幅度的增长最多在两个世纪内实现。
相比之下，海洋排放量开始缓慢增加，
在快速变暖之前的几个世纪，可能与一个
再平衡的地下氧气响应以前的变化。
海洋排放量减少，同时大气排放量也发生变化。
CO2和δ 13 C（CO2），在终止开始时
在Heinrich Stadial 1的早期阶段保持最低水平。期间
全新世早期，海洋N2 O排放量缓慢下降，为0.4 TgN yr-1，这表明地下环境的改善。
与缓慢增加的大西洋翻转一致的水通风
流通在全新世的后半期，
相对稳定的水平，但千年变化很大。的
后者仍然难以归因于海洋或陆地来源。我们
N2 O排放记录提供了重要的定量基准，
海洋和陆地氮循环模型，以研究
气候对氮周转的影响
冰川-间冰期变化
Abstract. Using high-precision and centennial-resolution ice core
information on atmospheric nitrous oxide concentrations and its stable
nitrogen and oxygen isotopic composition, we quantitatively reconstruct
changes in the terrestrial and marine N2O emissions over the last
21 000 years. Our reconstruction indicates that N2O emissions from land
and ocean increased over the deglaciation largely in parallel by 1.7±0.3 and 0.7±0.3 TgN yr−1, respectively, relative
to the Last Glacial Maximum level. However, during the abrupt Northern
Hemisphere warmings at the onset of the Bølling–Allerød warming and the end of
the Younger Dryas, terrestrial emissions respond more rapidly to the
northward shift in the Intertropical Convergence Zone connected to the
resumption 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 many
centuries before the rapid warmings, possibly connected to a
re-equilibration of subsurface oxygen in response to previous changes.
Marine emissions decreased, concomitantly with changes in atmospheric
CO2 and δ13C(CO2), at the onset of the termination
and remained minimal during the early phase of Heinrich Stadial 1. During
the early Holocene a slow decline in marine N2O emission of 0.4 TgN yr−1 is reconstructed, which suggests an improvement of subsurface
water ventilation in line with slowly increasing Atlantic overturning
circulation. In the second half of the Holocene total emissions remain on a
relatively constant level, but with significant millennial variability. The
latter is still difficult to attribute to marine or terrestrial sources. Our
N2O emission records provide important quantitative benchmarks for
ocean and terrestrial nitrogen cycle models to study the influence of
climate on nitrogen turnover on timescales from several decades to
glacial–interglacial changes.
影响因子：
5
作者：
Lewicka-Szczebak, Dominika;Well, Reinhard;Flessa, Heiner
通讯作者：
Flessa, Heiner