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The effect of misleading surface temperature estimations on the sensible heat fluxes at a high Arctic site : the Arctic turbulence experiment 2006 on Svalbard (ARCTEX-2006)

Title data

Lüers, Johannes ; Bareiss, Jörg:
The effect of misleading surface temperature estimations on the sensible heat fluxes at a high Arctic site : the Arctic turbulence experiment 2006 on Svalbard (ARCTEX-2006).
In: Atmospheric Chemistry and Physics. Vol. 10 (January 2010) Issue 1 . - pp. 157-168.
ISSN 1680-7324
DOI: https://doi.org/10.5194/acp-10-157-2010

Abstract in another language

The observed rapid climate warming in the Arctic requires improvements in permafrost and carbon cyclemonitoring, accomplished by setting up long-term observationsites with high-quality in-situ measurements of turbulentheat, water and carbon fluxes as well as soil physical parameters in Arctic landscapes. But accurate quantification and well adapted parameterizations of turbulent fluxes in polar environments presents fundamental problems in soilsnow-ice-vegetation-atmosphere interaction studies. One of these problems is the accurate estimation of the surface or aerodynamic temperature T(0) required to force most of the bulk aerodynamic formulae currently used. Results from the Arctic-Turbulence-Experiment (ARCTEX-2006) performed on Svalbard during the winter/spring transition 2006 helped to better understand the physical exchange and transport processes of energy. The existence of an atypical temperature profile close to the surface in the Arctic spring at Svalbard could be proven to be one of the major issues hindering estimation of the appropriate surface temperature. Thus, it is essential to adjust the set-up of measurement systems carefully when applying flux-gradient methods that are commonly used to force atmosphere-ocean/land-ice models. The results of a comparison of different sensible heat-flux parameterizations with direct measurements indicate that the use of a hydrodynamic three-layer temperature-profile model achieves the best fit and reproduces the temporal variability of the surface temperature better than other approaches.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER73241
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Micrometeorology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professorship Climatology - Univ.-Prof. Dr. Johannes Lüers
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 13 Aug 2015 06:11
Last Modified: 13 Aug 2015 06:11
URI: https://eref.uni-bayreuth.de/id/eprint/17954