Temperature effects on carbon storage are controlled by soil stabilisation capacities.
Temperature effects on carbon storage are controlled by soil stabilisation capacities.
复制标题
DOI：
10.1038/s41467-021-27101-1
复制
发表时间：
2021-11-18
影响因子：
16.6
通讯作者：
Hugelius G
中科院分区：
文献类型：
--
作者：
Hartley IP;Hill TC;Chadburn SE;Hugelius G
目前已知物理和化学稳定机制在控制矿质土壤中的碳（C）储存方面发挥着关键作用，这表明气候变暖引起的C损失可能低于先前的预测。通过分析9,000多个土壤剖面，我们发现，总体而言，碳储量随着年平均温度的下降而强烈下降。然而，减少碳存储与温度是三倍以上的粗质地的土壤，稳定有机质的能力有限，比细质地的土壤具有更大的稳定能力。这种模式是独立观察到在凉爽和温暖的地区，并考虑到潜在的混杂因素（植物生产力，降水，干旱，阳离子交换能力和pH值）。然而，这些结果不能用现有的地球系统模型（ESM）来表示。我们的结论是，气候变暖将促进大量的土壤碳损失，但ESM可能无法准确预测这些损失或哪些库存最脆弱。温度在多大程度上控制土壤碳储量仍然高度不确定。在这里，作者表明，在全球范围内，土壤碳储量随着温度的下降而强烈下降，但在有机质稳定能力有限的粗质地土壤中，这种影响要比细质地土壤大得多。
Physical and chemical stabilisation mechanisms are now known to play a critical role in controlling carbon (C) storage in mineral soils, leading to suggestions that climate warming-induced C losses may be lower than previously predicted. By analysing > 9,000 soil profiles, here we show that, overall, C storage declines strongly with mean annual temperature. However, the reduction in C storage with temperature was more than three times greater in coarse-textured soils, with limited capacities for stabilising organic matter, than in fine-textured soils with greater stabilisation capacities. This pattern was observed independently in cool and warm regions, and after accounting for potentially confounding factors (plant productivity, precipitation, aridity, cation exchange capacity, and pH). The results could not, however, be represented by an established Earth system model (ESM). We conclude that warming will promote substantial soil C losses, but ESMs may not be predicting these losses accurately or which stocks are most vulnerable. The extent to which temperature controls soil carbon storage remains highly uncertain. Here, the authors show that, globally, soil carbon stocks decline strongly with temperature, but the effect is much greater in coarse-textured soils with limited organic matter stabilisation capacities, than in fine-textured soils.
登录
查看更多内容
影响因子：
42.1
作者：
Garcia-Palacios, Pablo;Crowther, Thomas W.;Bradford, Mark A.
通讯作者：
Bradford, Mark A.
影响因子：
30.7
作者：
Haaf, David;Six, Johan;Doetterl, Sebastian
通讯作者：
Doetterl, Sebastian
DOI：
10.1002/joc.5086
发表时间：
2017-10-01
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Fick, Stephen E.;Hijmans, Robert J.
通讯作者：
Hijmans, Robert J.
影响因子：
18.3
作者：
Doetterl, S.;Berhe, A. A.;Boeckx, P.
通讯作者：
Boeckx, P.
影响因子：
4.9
作者：
Luo, Zhongkui;Viscarra-Rossel, Raphael A.;Qian, Tian
通讯作者：
Qian, Tian