Atmospheric heat and moisture transport to energy‐ and water‐limited ecosystems,Annals of the New York Academy of Sciences

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Atmospheric heat and moisture transport to energy‐ and water‐limited ecosystems
Annals of the New York Academy of Sciences ( IF 4.1 ) Pub Date : 2020-05-07 , DOI: 10.1111/nyas.14357
Dominik L Schumacher ₁ , Jessica Keune ₁ , Diego G Miralles ₁

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The land biosphere is a crucial component of the Earth system that interacts with the atmosphere in a complex manner through manifold feedback processes. These relationships are bidirectional, as climate affects our terrestrial ecosystems, which, in turn, influence climate. Great progress has been made in understanding the local interactions between the terrestrial biosphere and climate, but influences from remote regions through energy and water influxes to downwind ecosystems remain less explored. Using a Lagrangian trajectory model driven by atmospheric reanalysis data, we show how heat and moisture advection affect gross carbon production at interannual scales and in different ecoregions across the globe. For water‐limited regions, results show a detrimental effect on ecosystem productivity during periods of enhanced heat and reduced moisture advection. These periods are typically associated with winds that disproportionately come from continental source regions, as well as positive sensible heat flux and negative latent heat flux anomalies in those upwind locations. Our results underline the vulnerability of ecosystems to the occurrence of upwind climatic extremes and highlight the importance of the latter for the spatiotemporal propagation of ecosystem disturbances.

中文翻译：

大气热量和水分输送到能源和水资源有限的生态系统

陆地生物圈是地球系统的重要组成部分，它通过多种反馈过程以复杂的方式与大气相互作用。这些关系是双向的，因为气候会影响我们的陆地生态系统，进而影响气候。在了解陆地生物圈和气候之间的局部相互作用方面取得了很大进展，但偏远地区通过能源和水流入下风向生态系统的影响仍然很少被探索。使用由大气再分析数据驱动的拉格朗日轨迹模型，我们展示了热量和水分平流如何影响年际尺度和全球不同生态区的总碳产量。对于水资源有限的地区，结果表明，在热量增加和水分平流减少期间，会对生态系统生产力产生不利影响。这些时期通常与不成比例地来自大陆源区的风以及这些逆风位置的正感热通量和负潜热通量异常有关。我们的结果强调了生态系统对逆风气候极端事件发生的脆弱性，并强调了后者对生态系统扰动的时空传播的重要性。

更新日期：2020-05-07

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