Change search
ReferencesLink to record
Permanent link

Direct link
Contrasting roles of interception and transpiration in the hydrological cycle - Part 1: Temporal characteristics over land
Stockholm University, Faculty of Science, Stockholm Resilience Centre.
Stockholm University, Faculty of Science, Stockholm Resilience Centre.
2014 (English)In: Earth System Dynamics, ISSN 2190-4979, E-ISSN 2190-4987, Vol. 5, no 2, 441-469 p.Article in journal (Refereed) Published
Abstract [en]

Moisture recycling, the contribution of terrestrial evaporation to precipitation, has important implications for both water and land management. Although terrestrial evaporation consists of different fluxes (i.e. transpiration, vegetation interception, floor interception, soil moisture evaporation, and open-water evaporation), moisture recycling (terrestrial evaporation-precipitation feedback) studies have up to now only analysed their combined total. This paper constitutes the first of two companion papers that investigate the characteristics and roles of different evaporation fluxes for land-atmosphere interactions. Here, we investigate the temporal characteristics of partitioned evaporation on land and present STEAM (Simple Terrestrial Evaporation to Atmosphere Model) - a hydrological land-surface model developed to provide inputs to moisture tracking. STEAM estimates a mean global terrestrial evaporation of 73 900 km(3)year(-1), of which 59% is transpiration. Despite a relatively simple model structure, validation shows that STEAM produces realistic evaporative partitioning and hydrological fluxes that compare well with other global estimates over different locations, seasons, and land-use types. Using STEAM output, we show that the terrestrial residence timescale of transpiration (days to months) has larger inter-seasonal variation and is substantially longer than that of interception (hours). Most transpiration occurs several hours or days after a rain event, whereas interception is immediate. In agreement with previous research, our simulations suggest that the vegetation's ability to transpire by retaining and accessing soil moisture at greater depth is critical for sustained evaporation during the dry season. We conclude that the differences in temporal characteristics between evaporation fluxes are substantial and reasonably can cause differences in moisture recycling, which is investigated more in the companion paper (van der Ent et al., 2014, hereafter Part 2).

Place, publisher, year, edition, pages
2014. Vol. 5, no 2, 441-469 p.
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:su:diva-113142DOI: 10.5194/esd-5-441-2014ISI: 000346140900013OAI: diva2:791337


Available from: 2015-02-27 Created: 2015-01-23 Last updated: 2016-09-27

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Wang-Erlandsson, LanGordon, Line J.
By organisation
Stockholm Resilience Centre
In the same journal
Earth System Dynamics
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 61 hits
ReferencesLink to record
Permanent link

Direct link