Global observational diagnosis of soil moisture control on the land surface energy balance
Gallego-Elvira, Belen; Taylor, Christopher M. ORCID: https://orcid.org/0000-0002-0120-3198; Harris, Phil P.; Ghent, Darren; Veal, Karen L.; Folwell, Sonja S.. 2016 Global observational diagnosis of soil moisture control on the land surface energy balance. Geophysical Research Letters, 43 (6). 2623-2631. 10.1002/2016GL068178
Before downloading, please read NORA policies.Preview |
Text
N513332JA.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (811kB) | Preview |
Abstract/Summary
An understanding of where and how strongly the surface energy budget is constrained by soil moisture is hindered by a lack of large-scale observations, and this contributes to uncertainty in climate models. Here we present a new approach combining satellite observations of land surface temperature and rainfall.We derive a Relative Warming Rate (RWR) diagnostic, which is a measure of how rapidly the land warms relative to the overlying atmosphere during 10 day dry spells. In our dry spell composites, 73% of the land surface between 60°S and 60°N warms faster than the atmosphere, indicating water-stressed conditions, and increases in sensible heat. Higher RWRs are found for shorter vegetation and bare soil than for tall, deep-rooted vegetation, due to differences in aerodynamic and hydrological properties. We show how the variation of RWR with antecedent rainfall helps to identify different evaporative regimes in the major nonpolar climate zones.
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | 10.1002/2016GL068178 |
UKCEH and CEH Sections/Science Areas: | Reynard |
ISSN: | 0094-8276 |
Additional Information. Not used in RCUK Gateway to Research.: | Open Access paper - full text available via Official URL link. |
Additional Keywords: | sensible heat flux, evapotranspiration, land surface temperature |
NORA Subject Terms: | Earth Sciences Hydrology Meteorology and Climatology |
Date made live: | 31 Mar 2016 11:55 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/513332 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year