The Arctic Carbon Cycle and Its Response to Changing Climate
The Arctic Carbon Cycle and Its Response to Changing Climate
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DOI：
10.1007/s40641-020-00169-5
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发表时间：
2021-02-02
影响因子：
9.5
通讯作者：
Palmer, Paul, I
中科院分区：
文献类型：
--
作者：
Bruhwiler, Lori;Parmentier, Frans-Jan W.;Palmer, Paul, I
北极经历了地球上任何地方最迅速的气候变化，这些变化肯定会推动北极碳收支的变化，因为植被变化，土壤变暖，火灾变得更加频繁，湿地随着永久冻土的融化而演变。在本研究中，我们回顾了北极气候变化及其对碳循环的影响的广泛证据。此外，我们重新评估了北极碳收支变化的一些观测证据。观测结果表明，在北纬高纬度生态系统中，二氧化碳循环更为活跃。有证据表明，北方森林和北极生态系统的吸收量增加，呼吸作用也在增加，尤其是在秋季。然而，目前没有强有力的证据表明甲烷排放量增加。利用自下而上（如通量）和自上而下（大气丰度）方法进行长期观测，对于了解不断变化的碳循环收支至关重要。考虑大气输送对于解释自上而下的大气碳观测至关重要。
Purpose of Review The Arctic has experienced the most rapid change in climate of anywhere on Earth, and these changes are certain to drive changes in the carbon budget of the Arctic as vegetation changes, soils warm, fires become more frequent, and wetlands evolve as permafrost thaws. In this study, we review the extensive evidence for Arctic climate change and effects on the carbon cycle. In addition, we re-evaluate some of the observational evidence for changing Arctic carbon budgets. Recent Findings Observations suggest a more active CO2 cycle in high northern latitude ecosystems. Evidence points to increased uptake by boreal forests and Arctic ecosystems, as well as increasing respiration, especially in autumn. However, there is currently no strong evidence of increased CH4 emissions. Long-term observations using both bottom-up (e.g., flux) and top-down (atmospheric abundance) approaches are essential for understanding changing carbon cycle budgets. Consideration of atmospheric transport is critical for interpretation of top-down observations of atmospheric carbon.