Functional relationships reveal differences in the water cycle representation of global water models
- Publication type:
- Journal article
- Metadata:
-
- Abstract
- <jats:title>Abstract</jats:title><jats:p>Global water models are increasingly used to understand past, present and future water cycles, but disagreements between simulated variables make model-based inferences uncertain. Although there is empirical evidence of different large-scale relationships in hydrology, these relationships are rarely considered in model evaluation. Here we evaluate global water models using functional relationships that capture the spatial co-variability of forcing variables (precipitation, net radiation) and key response variables (actual evapotranspiration, groundwater recharge, total runoff). Results show strong disagreement in both shape and strength of model-based functional relationships, especially for groundwater recharge. Empirical and theory-derived functional relationships show varying agreements with models, indicating that our process understanding is particularly uncertain for energy balance processes, groundwater recharge processes and in dry and/or cold regions. Functional relationships offer great potential for model evaluation and an opportunity for fundamental advances in global hydrology and Earth system research in general.</jats:p>
- Autoren
- Sebastian Gnann
- Robert Reinecke
- Lina Stein
- Yoshihide Wada
- Wim Thiery
- Hannes Müller Schmied
- Yusuke Satoh
- Yadu Pokhrel
- Sebastian Ostberg
- Aristeidis Koutroulis
- Naota Hanasaki
- Manolis Grillakis
- Simon N Gosling
- Peter Burek
- Marc FP Bierkens
- Thorsten Wagener
- DOI
- 10.1038/s44221-023-00160-y
- eISSN
- 2731-6084
- Ausgabe der Veröffentlichung
- 12
- Zeitschrift
- Nature Water
- Sprache
- en
- Online publication date
- 2023
- Paginierung
- 1079 - 1090
- Status
- Published online
- Herausgeber
- Springer Science and Business Media LLC
- Herausgeber URL
- http://dx.doi.org/10.1038/s44221-023-00160-y
- Datum der Datenerfassung
- 2023
- Titel
- Functional relationships reveal differences in the water cycle representation of global water models
- Ausgabe der Zeitschrift
- 1
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