Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes.
Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes.
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DOI：
10.1007/s13280-021-01666-z
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发表时间：
2022-03
期刊：
影响因子：
6.5
通讯作者：
Juhls B
中科院分区：
文献类型：
--
作者：
Mann PJ;Strauss J;Palmtag J;Dowdy K;Ogneva O;Fuchs M;Bedington M;Torres R;Polimene L;Overduin P;Mollenhauer G;Grosse G;Rachold V;Sobczak WV;Spencer RGM;Juhls B
北极变暖正在导致古老的常年冻土（永久冻土）融化，导致地面塌陷和景观重塑。这威胁到北极人民的基础设施、文化遗址和陆地自然资源。陆地永久冻土融化和水文循环的持续加剧也增加了从陆地到北极近岸环境的有机碳（OC）的数量并改变了其类型。这些变化可能影响到许多传统生活方式所依赖的沿海进程、食物网动态和海洋资源。在这里，我们研究未来预计增加径流和永冻融从两个永冻为主的西伯利亚流域科雷马和莉娜，可能会改变通过河流网络的碳周转率和OC分布。我们证明了陆地永冻层来源的OC的独特组成可以显著增加水生碳降解速率（1%永冻层OC的速率快20%至60%）。我们汇编了水生有机碳退化的结果，并研究了如何加强北极水文循环可能会增加陆地景观和接收近岸生态系统之间的连接，对沿海碳预算和生态系统结构的潜在影响。为了解决北极沿海社区将面临的未来挑战，我们认为，这将成为至关重要的考虑近岸生态系统将如何应对不断变化的沿海投入，并确定这些可能会影响基本粮食资源的弹性和可用性。在线版本包含补充材料，可通过10.1007/s13280-021-01666-z获得。
Arctic warming is causing ancient perennially frozen ground (permafrost) to thaw, resulting in ground collapse, and reshaping of landscapes. This threatens Arctic peoples' infrastructure, cultural sites, and land-based natural resources. Terrestrial permafrost thaw and ongoing intensification of hydrological cycles also enhance the amount and alter the type of organic carbon (OC) delivered from land to Arctic nearshore environments. These changes may affect coastal processes, food web dynamics and marine resources on which many traditional ways of life rely. Here, we examine how future projected increases in runoff and permafrost thaw from two permafrost-dominated Siberian watersheds—the Kolyma and Lena, may alter carbon turnover rates and OC distributions through river networks. We demonstrate that the unique composition of terrestrial permafrost-derived OC can cause significant increases to aquatic carbon degradation rates (20 to 60% faster rates with 1% permafrost OC). We compile results on aquatic OC degradation and examine how strengthening Arctic hydrological cycles may increase the connectivity between terrestrial landscapes and receiving nearshore ecosystems, with potential ramifications for coastal carbon budgets and ecosystem structure. To address the future challenges Arctic coastal communities will face, we argue that it will become essential to consider how nearshore ecosystems will respond to changing coastal inputs and identify how these may affect the resiliency and availability of essential food resources. The online version contains supplementary material available at 10.1007/s13280-021-01666-z.
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纠正评估天然水域有机碳污染的重大错误
影响因子：
13.6
作者：
Jiao N;Liu J;Edwards B;Lv Z;Cai R;Liu Y;Xiao X;Wang J;Jiao F;Wang R;Huang X;Guo B;Sun J;Zhang R;Zhang Y;Tang K;Zheng Q;Azam F;Batt J;Cai WJ;He C;Herndl GJ;Hill P;Hutchins D;LaRoche J;Lewis M;MacIntyre H;Polimene L;Robinson C;Shi Q;Suttle CA;Thomas H;Wallace D;Legendre L
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DOI：
10.1073/pnas.1511705112
发表时间：
2015-11-10
影响因子：
11.1
作者：
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影响因子：
3.7
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影响因子：
5.2
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影响因子：
4.4
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