Comparing deuterium excess to large-scale precipitation recycling models in the tropics

Abstract Precipitation recycling is essential to sustaining regional ecosystems and water supplies, and it is impacted by land development and climate change. This is especially true in the tropics, where dense vegetation greatly influences recycling. Unfortunately, large-scale models of recycling o...

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Autores principales:	Stephen Cropper, Kurt Solander, Brent D. Newman, Obbe A. Tuinenburg, Arie Staal, Jolanda J. E. Theeuwen, Chonggang Xu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Environmental sciences GE1-350 Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/7556431a8f6f42c189ab78c6ba951800
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spelling	oai:doaj.org-article:7556431a8f6f42c189ab78c6ba9518002021-12-05T12:18:37ZComparing deuterium excess to large-scale precipitation recycling models in the tropics10.1038/s41612-021-00217-32397-3722https://doaj.org/article/7556431a8f6f42c189ab78c6ba9518002021-12-01T00:00:00Zhttps://doi.org/10.1038/s41612-021-00217-3https://doaj.org/toc/2397-3722Abstract Precipitation recycling is essential to sustaining regional ecosystems and water supplies, and it is impacted by land development and climate change. This is especially true in the tropics, where dense vegetation greatly influences recycling. Unfortunately, large-scale models of recycling often exhibit high uncertainty, complicating efforts to estimate recycling. Here, we examine how deuterium excess (d-excess), a stable-isotope quantity sensitive to recycling effects, acts as an observational proxy for recycling. While past studies have connected variability in d-excess to precipitation origins at local or regional scales, our study leverages >3000 precipitation isotope samples to quantitatively compare d-excess against three contemporary recycling models across the global tropics. Using rank-correlation, we find statistically significant agreement ( $$\bar \tau = 0.52$$ τ ¯ = 0.52 to $$0.70$$ 0.70 ) between tropical d-excess and recycling that is strongly mediated by seasonal precipitation, vegetation density, and scale mismatch. Our results detail the complex relationship between d-excess and precipitation recycling, suggesting avenues for further investigation.Stephen CropperKurt SolanderBrent D. NewmanObbe A. TuinenburgArie StaalJolanda J. E. TheeuwenChonggang XuNature PortfolioarticleEnvironmental sciencesGE1-350Meteorology. ClimatologyQC851-999ENnpj Climate and Atmospheric Science, Vol 4, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Meteorology. Climatology QC851-999
spellingShingle	Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Stephen Cropper Kurt Solander Brent D. Newman Obbe A. Tuinenburg Arie Staal Jolanda J. E. Theeuwen Chonggang Xu Comparing deuterium excess to large-scale precipitation recycling models in the tropics
description	Abstract Precipitation recycling is essential to sustaining regional ecosystems and water supplies, and it is impacted by land development and climate change. This is especially true in the tropics, where dense vegetation greatly influences recycling. Unfortunately, large-scale models of recycling often exhibit high uncertainty, complicating efforts to estimate recycling. Here, we examine how deuterium excess (d-excess), a stable-isotope quantity sensitive to recycling effects, acts as an observational proxy for recycling. While past studies have connected variability in d-excess to precipitation origins at local or regional scales, our study leverages >3000 precipitation isotope samples to quantitatively compare d-excess against three contemporary recycling models across the global tropics. Using rank-correlation, we find statistically significant agreement ( $$\bar \tau = 0.52$$ τ ¯ = 0.52 to $$0.70$$ 0.70 ) between tropical d-excess and recycling that is strongly mediated by seasonal precipitation, vegetation density, and scale mismatch. Our results detail the complex relationship between d-excess and precipitation recycling, suggesting avenues for further investigation.
format	article
author	Stephen Cropper Kurt Solander Brent D. Newman Obbe A. Tuinenburg Arie Staal Jolanda J. E. Theeuwen Chonggang Xu
author_facet	Stephen Cropper Kurt Solander Brent D. Newman Obbe A. Tuinenburg Arie Staal Jolanda J. E. Theeuwen Chonggang Xu
author_sort	Stephen Cropper
title	Comparing deuterium excess to large-scale precipitation recycling models in the tropics
title_short	Comparing deuterium excess to large-scale precipitation recycling models in the tropics
title_full	Comparing deuterium excess to large-scale precipitation recycling models in the tropics
title_fullStr	Comparing deuterium excess to large-scale precipitation recycling models in the tropics
title_full_unstemmed	Comparing deuterium excess to large-scale precipitation recycling models in the tropics
title_sort	comparing deuterium excess to large-scale precipitation recycling models in the tropics
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7556431a8f6f42c189ab78c6ba951800
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Comparing deuterium excess to large-scale precipitation recycling models in the tropics

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