Change search
ReferencesLink to record
Permanent link

Direct link
Evaluation of Near-Surface Variables and the Vertical Structure of the Boundary Layer in CMIP5 Models
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology .
Number of Authors: 2
2015 (English)In: Journal of Climate, ISSN 0894-8755, E-ISSN 1520-0442, Vol. 28, no 13, 5233-5253 p.Article in journal (Refereed) Published
Abstract [en]

The diurnal cycles of near-surface variables and turbulent heat fluxes are evaluated in 16 models from phase 5 of CMIP (CMIP5) and compared with observations from 26 flux tower sites. The diurnal cycle of 2-m temperature agrees well in general with what is observed. The amplitude of the diurnal cycle of wind speed shows a large intermodel spread and is often overestimated at midlatitude grassland sites and underestimated at midlatitude forest sites. There is a substantial systematic negative bias in the nighttime net surface radiative flux, which is partly compensated for by the turbulent heat fluxes. Four models (CESM1, BCC_CSM1.1, HadGEM2-A, and IPSL-CM5A) are evaluated in more detail, including the vertical structure of the atmospheric boundary layer, at the ARM Southern Great Plains site in Oklahoma. At that site, all models tend to frequently overestimate the boundary layer depth and the wind turning in the boundary layer reveals large intermodel differences. In summer, these models exhibit a substantial warm bias with particularly high daytime temperatures. These high temperatures are associated with very small latent heat fluxes, indicating that the soil is too dry, which is likely to impact climate change scenarios.

Place, publisher, year, edition, pages
2015. Vol. 28, no 13, 5233-5253 p.
National Category
Meteorology and Atmospheric Sciences
URN: urn:nbn:se:su:diva-119233DOI: 10.1175/JCLI-D-14-00596.1ISI: 000357485700013OAI: diva2:846212
Available from: 2015-08-14 Created: 2015-08-03 Last updated: 2015-08-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Svensson, Gunilla
By organisation
Department of Meteorology
In the same journal
Journal of Climate
Meteorology and Atmospheric 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: 135 hits
ReferencesLink to record
Permanent link

Direct link