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Related Experiment Video

Updated: Jul 9, 2026

Design and Construction of an Urban Runoff Research Facility

Design and Construction of an Urban Runoff Research Facility

Published on: August 8, 2014

Continental runoff: a quality-controlled global runoff data set.

Murray C Peel¹, Thomas A McMahon

¹Department of Civil & Environmental Engineering, University of Melbourne, Victoria, 3010, Australia.

|December 8, 2006

Summary

Concerns are raised regarding the data set and methods used to assess twentieth-century continental runoff. These issues may challenge the conclusion that CO2-induced stomatal closure suppressed plant transpiration, impacting runoff.

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Area of Science:

Earth System Science
Hydrology
Climate Science

Background:

Gedney et al. proposed that increased continental runoff in the 20th century resulted from suppressed plant transpiration due to CO2-induced stomatal closure.
Their study replicated a continental runoff data set to support this hypothesis.

Discussion:

This critique questions the validity of the continental runoff data set used by Gedney et al.
Concerns are also raised about the specific methodologies employed in constructing this data set.
These potential data and methodological flaws may undermine the original conclusions.

Key Insights:

The reliability of the continental runoff data set is under scrutiny.
Methodological concerns suggest potential biases or errors in the data construction.
The link between CO2, stomatal closure, plant transpiration, and continental runoff requires re-evaluation.

Outlook:

Further investigation into alternative data sources and robust methodologies is warranted.
Replication and validation of runoff data are crucial for accurate climate change impact assessments.
A thorough re-examination of the drivers of 20th-century continental runoff is needed.