A global assessment of the mixed layer in coastal sediments and implications for carbon storage.
A global assessment of the mixed layer in coastal sediments and implications for carbon storage.
复制标题
沿海沉积物混合层的全球评估及其对碳储存的影响
DOI:
10.1038/s41467-022-32650-0
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发表时间:
2022-08-20
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
The sediment-water interface in the coastal ocean is a highly dynamic zone controlling biogeochemical fluxes of greenhouse gases, nutrients, and metals. Processes in the sediment mixed layer (SML) control the transfer and reactivity of both particulate and dissolved matter in coastal interfaces. Here we map the global distribution of the coastal SML based on excess 210Pb (210Pbex) profiles and then use a neural network model to upscale these observations. We show that highly dynamic regions such as large estuaries have thicker SMLs than most oceanic sediments. Organic carbon preservation and SMLs are inversely related as mixing stimulates oxidation in sediments which enhances organic matter decomposition. Sites with SML thickness >60 cm usually have lower organic carbon accumulation rates (<50 g C m−2 yr−1) and total organic carbon/specific surface area ratios (<0.4 mg m−2). Our global scale observations reveal that reworking can accelerate organic matter degradation and reduce carbon storage in coastal sediments. The authors map the global distribution of the mixed layer in coastal ocean sediments, based on a neural network model. These observations reveal that mixing can accelerate organic matter degradation and reduce carbon storage in the coastal ocean.
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影响因子:
2.3
作者:
Allison, MA;Sheremet, A;Stone, GW
通讯作者:
Stone, GW
影响因子:
11.4
作者:
BRULAND, KW;BERTINE, K;GOLDBERG, ED
通讯作者:
GOLDBERG, ED
DOI:
10.1016/0967-0637(95)00068-h
发表时间:
1995-09-01
影响因子:
2.4
作者:
BRAINERD, KE;GREGG, MC
通讯作者:
GREGG, MC
影响因子:
2.3
作者:
Aller, Robert C.;Blair, Neal E.
通讯作者:
Blair, Neal E.
影响因子:
4.5
作者:
Boudreau, BP
通讯作者:
Boudreau, BP