Dpto. de Sistemas y Recursos Naturales, Universidad Politécnica de Madrid, Madrid, Spain.
Dpto. Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, Madrid, Spain.
Nat Commun. 2022 Apr 19;13(1):2015. doi: 10.1038/s41467-022-29615-8.
The mechanistic pathways connecting ocean-atmosphere variability and terrestrial productivity are well-established theoretically, but remain challenging to quantify empirically. Such quantification will greatly improve the assessment and prediction of changes in terrestrial carbon sequestration in response to dynamically induced climatic extremes. The jet stream latitude (JSL) over the North Atlantic-European domain provides a synthetic and robust physical framework that integrates climate variability not accounted for by atmospheric circulation patterns alone. Surface climate impacts of north-south summer JSL displacements are not uniform across Europe, but rather create a northwestern-southeastern dipole in forest productivity and radial-growth anomalies. Summer JSL variability over the eastern North Atlantic-European domain (5-40E) exerts the strongest impact on European beech, inducing anomalies of up to 30% in modelled gross primary productivity and 50% in radial tree growth. The net effects of JSL movements on terrestrial carbon fluxes depend on forest density, carbon stocks, and productivity imbalances across biogeographic regions.
海洋-大气变化与陆地生产力之间的机制途径在理论上已得到充分证实，但在经验上仍难以量化。这种量化将极大地提高对陆地碳固存响应动态诱发气候极端变化的评估和预测。北大西洋-欧洲区域的急流纬度（JSL）提供了一个综合而稳健的物理框架，它整合了仅由大气环流模式无法解释的气候变异性。北大西洋-欧洲区域夏季南北向 JSL 位移对欧洲的地表气候影响并不均匀，而是在森林生产力和径向生长异常方面形成了一个西北-东南偶极子。北大西洋-欧洲东部区域（5-40E）的夏季 JSL 变率对欧洲山毛榉的影响最大，导致模拟总初级生产力的异常高达 30%，径向树木生长的异常高达 50%。JSL 运动对陆地碳通量的净效应取决于森林密度、碳储量以及生物地理区域之间的生产力不平衡。
