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Uncertainty in atmospheric profiles and its impact on modeled convection development at Nam Co Lake, Tibetan Plateau

Title data

Gerken, Tobias ; Babel, Wolfgang ; Sun, Fanglin ; Herzog, Michael ; Ma, Yaoming ; Foken, Thomas ; Graf, Hans-F.:
Uncertainty in atmospheric profiles and its impact on modeled convection development at Nam Co Lake, Tibetan Plateau.
In: Journal of Geophysical Research: Atmospheres. Vol. 118 (2013) Issue 22 . - 12,317-12,331.
ISSN 2169-8996
DOI: https://doi.org/10.1002/2013JD020647

Abstract in another language

This work investigates the influence of atmospheric temperature and relative humidity profiles obtained from radiosoundings, NCEP I and ERA-INT reanalysis and GFS-FNL analysis data on the simulated evolution of clouds and convection at Nam Co Lake on the Tibetan Plateau. In addition to differences in moisture, the initial atmospheric profiles exhibit considerable differences in near surface temperatures that affect vertical stability. Our analysis is carried out during two days in summer 2012 using a 2D high-resolution modeling approach with a fully interactive surface model so that surface fluxes react to changes in cloud cover. Modeled convection for the radiosounding profile compares reasonably well with weather observations for the first day, but less well for the second day, when large-scale synoptic effects, not included in the model, become more important. The choice of vertical profile information leads to strongly differing convection development, translating into modifications of the surface energy balance and of the energy and water cycle for the basin. There are strong differences spanning one order of magnitude in the generated precipitation between the model simulations driven by different vertical profiles. This highlights the importance of correct and high resolution vertical profiles for model initialization.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER119078
Institutions of the University: 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 Micrometeorology - Univ.-Prof. Dr. Thomas Foken
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
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: 18 May 2015 09:01
Last Modified: 18 May 2015 09:01
URI: https://eref.uni-bayreuth.de/id/eprint/13853