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Related Experiment Video

Updated: Jan 19, 2026

Global Gene Expression Analysis Using a Zebrafish Oligonucleotide Microarray Platform
13:14

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Published on: August 10, 2009

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Aridity is expressed in river topography globally.

Shiuan-An Chen1, Katerina Michaelides2,3, Stuart W D Grieve4

  • 1School of Geographical Sciences, University of Bristol, Bristol, UK. sc16970@bristol.ac.uk.

Nature
|September 19, 2019
PubMed
Summary

Climate significantly shapes river topography. River profiles become straighter in drier regions, indicating aridity is a primary driver of drainage basin evolution, influenced by rainfall-runoff regimes.

More Related Videos

Methods of Obtaining Topography
01:25

Methods of Obtaining Topography

Published on: March 26, 2025

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Related Experiment Videos

Last Updated: Jan 19, 2026

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Methods of Obtaining Topography
01:25

Methods of Obtaining Topography

Published on: March 26, 2025

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Area of Science:

  • Earth Surface Processes
  • Geomorphology
  • Climate Science

Background:

  • Climate influences land surface topography via rainfall, runoff, and erosion in drainage basins.
  • River longitudinal profiles reflect drainage basin evolution and should indicate regional climate interactions.
  • Detecting climate signals in river profiles is difficult due to data limitations and confounding factors like tectonics and land use.

Purpose of the Study:

  • To investigate the relationship between climate zones and river longitudinal profile shapes globally.
  • To identify climatic mechanisms controlling river profile evolution.

Main Methods:

  • Compiled a global dataset of 333,502 river longitudinal profiles.
  • Analyzed profile shapes (concavity) across different climate zones.
  • Utilized simple numerical modeling to test hydrological controls on profile shapes.

Main Results:

  • River profiles exhibit systematically straighter shapes with increasing aridity.
  • Global patterns in river profile shape are explained by hydrological controls linked to rainfall-runoff regimes.
  • The downstream rate of change in streamflow, independent of drainage area, is a key factor.

Conclusions:

  • River topography clearly expresses a signature of aridity.
  • Climate is a first-order control on drainage basin evolution.
  • Hydrological responses to varying rainfall-runoff regimes are critical in shaping river profiles.