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Significant contribution of non-vascular vegetation to global rainfall interception
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry. University of Potsdam, Germany.
Number of Authors: 32018 (English)In: Nature Geoscience, ISSN 1752-0894, E-ISSN 1752-0908, Vol. 11, no 8, p. 563-+Article in journal (Refereed) Published
Abstract [en]

Non-vascular vegetation has been shown to capture considerable quantities of rainfall, which may affect the hydrological cycle and climate at continental scales. However, direct measurements of rainfall interception by non-vascular vegetation are confined to the local scale, which makes extrapolation to the global effects difficult. Here we use a process-based numerical simulation model to show that non-vascular vegetation contributes substantially to global rainfall interception. Inferred average global water storage capacity including non-vascular vegetation was 2.7 mm, which is consistent with field observations and markedly exceeds the values used in land surface models, which average around 0.4 mm. Consequently, we find that the total evaporation of free water from the forest canopy and soil surface increases by 61% when non-vascular vegetation is included, resulting in a global rainfall interception flux that is 22% of the terrestrial evaporative flux (compared with only 12% for simulations where interception excludes non-vascular vegetation). We thus conclude that non-vascular vegetation is likely to significantly influence global rainfall interception and evaporation with consequences for regional-to continental-scale hydrologic cycling and climate.

Place, publisher, year, edition, pages
2018. Vol. 11, no 8, p. 563-+
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-158911DOI: 10.1038/s41561-018-0176-7ISI: 000440301400007OAI: oai:DiVA.org:su-158911DiVA, id: diva2:1240105
Available from: 2018-08-20 Created: 2018-08-20 Last updated: 2018-08-20Bibliographically approved

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