Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Hydroclimatic changes worldwide: distinguishing freshwater signals of flow regulation and irrigation effects
Stockholm University, Faculty of Science, Department of Physical Geography. (Hydrology)ORCID iD: 0000-0001-5978-9884
Stockholm University, Faculty of Science, Department of Physical Geography.
(English)In: Journal of Climate, ISSN 0894-8755, E-ISSN 1520-0442Article in journal (Refereed) Submitted
Abstract [en]

This study analyzes worldwide hydroclimatic changes over the period 1900-2009 based on observation data for 99 large hydrological basins across all continents. Worldwide, the observed atmospheric changes in temperature and (uncorrected or bias-corrected) precipitation over land cannot alone explain corresponding changes in evapotranspiration and runoff on land. Additional landscape drivers are needed to explain the latter. Possible effects of river system fragmentation and flow regulation (FFR) as such drivers are here investigated based on independent categorization and parameterization of FFR impact in the studied basins. Consistent signals of FFR-driven change are distinguished and include decrease in the long-term average runoff and the coefficient of short-term variation of runoff; these decreases are greater for basins with higher flow regulation factor. The signals also include increase in evapotranspiration relative to precipitation for strongly FFR-affected basins; this increase is greater for basins with higher flow regulation factor and higher irrigation index. These FFR-related change signals are distinguished consistently and directly from worldwide observation data, against the background of large change variability among basins and several coexisting drivers of water change for each basin. These findings should be used and accounted for in further quantification and projection of global freshwater change.

Keyword [en]
hydroclimate, worldwide, irrigation, fragmentation andf flow regulation, runoff, evapotranspiration, runoff variability, precipitation variability, climate change
National Category
Physical Geography Oceanography, Hydrology, Water Resources
Research subject
Hydrology
Identifiers
URN: urn:nbn:se:su:diva-113096OAI: oai:DiVA.org:su-113096DiVA: diva2:782987
Projects
VR, project 2009-3221
Funder
Swedish Research Council, 2009-3221A multiscale, cross‐disciplinary approach to the study of climate change effect on ecosystem services and biodiversity
Note

Manuscript in review

Available from: 2015-01-23 Created: 2015-01-23 Last updated: 2017-12-05Bibliographically approved
In thesis
1. Changes in the Freshwater System: Distinguishing Climate and Landscape Drivers
Open this publication in new window or tab >>Changes in the Freshwater System: Distinguishing Climate and Landscape Drivers
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Freshwater is a vital resource that circulates between the atmosphere, the land and the sea. Understanding and quantifying changes to the partitioning of precipitation into evapotranspiration, runoff and water storage change in the landscape are required for assessing changes to freshwater availability. However, the partitioning processes and their changes are complex due to multiple change drivers and effects. This thesis investigates and aims to identify and separate the effects of atmospheric climate change and various landscape drivers on long-term freshwater change. This is done based on hydroclimatic, land-use and water-use data from the beginning of the twentieth century up to present times and across different regions and scales, from catchment to global. The analyzed landscape drivers include historic developments of irrigated and non-irrigated agriculture and flow regulation. The thesis uses and develops further a data-motivated approach to interpret available hydroclimatic and landscape data for identification of water change drivers and effects, expanding the approach application from local to continental and global scales. Based on this approach development, the thesis identifies hydroclimatic change signals of landscape drivers against the background of multiple coexisting drivers influencing worldwide freshwater change, within and among hydrological basins. Globally, landscape drivers are needed to explain more than 70% of the historic hydroclimatic changes, of which a considerable proportion may be directly human-driven. These landscape- and human-driven water changes need to be considered and accounted for also in modeling and projection of changes to the freshwater system on land.

Place, publisher, year, edition, pages
Stockholm: Department of Physical Geography, Stockholm University, 2015. 84 p.
Series
Dissertations from the Department of Physical Geography, ISSN 1653-7211 ; 47
Keyword
Budyko, evapotranspiration, freshwater, hydrology, hydroclimatic change, landscape change, land use, observation data, runoff, separation, water partitioning, water storage change, water use, worldwide
National Category
Oceanography, Hydrology, Water Resources Physical Geography Climate Research
Research subject
Physical Geography
Identifiers
urn:nbn:se:su:diva-113101 (URN)978-91-7649-092-1 (ISBN)
Public defence
2015-03-05, De Geersalen, Geovetenskapens hus, Svante Arrhenius väg 14, Stockholm, 13:00 (English)
Opponent
Supervisors
Projects
VR, project 2009-3221
Funder
Swedish Research Council, 2009-3221A multiscale, cross‐disciplinary approach to the study of climate change effect on ecosystem services and biodiversity
Note

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Submitted.

Available from: 2015-02-11 Created: 2015-01-23 Last updated: 2015-01-29Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Jaramillo, FernandoDestouni, Georgia
By organisation
Department of Physical Geography
In the same journal
Journal of Climate
Physical GeographyOceanography, Hydrology, Water Resources

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 438 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf