publication . Doctoral thesis . 2011

Global land-atmosphere coupling associated with cold climate processes

Dutra, Emanuel, 1983-;
Open Access English
  • Published: 01 Jan 2011
  • Country: Portugal
Abstract
Tese de doutoramento, Ciências Geofísicas e da Geoinformação (Meteorologia), Universidade de Lisboa, Faculdade de Ciências, 2011 This dissertation constitutes an assessment of the role of cold processes, associated with snow cover, in controlling the land-atmosphere coupling. The work was based on model simulations, including offline simulations with the land surface model HTESSEL, and coupled atmosphere simulations with the EC-EARTH climate model. A revised snow scheme was developed and tested in HTESSEL and EC-EARTH. The snow scheme is currently operational at the European Centre for Medium-Range Weather Forecasts integrated forecast system, and in the default...
Subjects
free text keywords: Neve, Lagos, Sistema climático, Acoplamento terra-atmosfera, Engenharia geofísica, Teses de doutoramento - 2011
Related Organizations
Funded by
FCT| PTDC/AAC-CLI/109030/2008
Project
PTDC/AAC-CLI/109030/2008
AMIC - Assessing the Mid-Century Climate transition: contributing to an ensemble of global and regional decadal simulations
  • Funder: Fundação para a Ciência e a Tecnologia, I.P. (FCT)
  • Project Code: 109030
  • Funding stream: 3599-PPCDT
,
FCT| SFRH/BD/35789/2007
Project
SFRH/BD/35789/2007
THE STRENGTH OF LAND-ATMOSPHERE FEEDBACKS AND IMPLICATIONS FOR GLOBAL CHANGE
  • Funder: Fundação para a Ciência e a Tecnologia, I.P. (FCT)
  • Project Code: SFRH/BD/35789/2007
  • Funding stream: SFRH | Doutoramento
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An Improved Snow Scheme for the ECMWF Land Surface Model: Description and Offline Validation ................................................................................................................ 20

3.1 Introduction ............................................................................................................ 21

3.2 Models .................................................................................................................... 22 3.2.1 HTESSEL 22 3.2.2 Revised snow scheme 23

3.3 Site validation......................................................................................................... 27 3.3.1 Simulation setup and observations 27 3.3.2 Snow depth, density and SWE 28 3.3.3 Snow and soil temperature 29 3.3.4 Sensitivity to activated parameterizations 30

3.4 Basin-scale validation............................................................................................. 31 3.4.1 Simulation setup 31 3.4.2 Basins and observations 32 3.4.3 Impact in the Ob basin 32 3.4.4 Monthly TWSV and runoff 33

3.5 Global validation .................................................................................................... 35 3.5.1 Simulations setup 35 3.5.2 Snow cover 35 3.5.3 Surface albedo 37

3.6 Conclusions ............................................................................................................ 39

3.7 Appendix: HTESSEL old snow scheme................................................................. 41 Allen, R. J., and C. S. Zender, 2010: Effects of continental-scale snow albedo anomalies on the wintertime Arctic oscillation, J. Geophys. Res., 115(D23), D23105, doi: 10.1029/2010jd014490.

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Balsamo, G., E. Dutra, V. M. Stepanenko, P. Viterbo, P. M. A. Miranda, and D. Mironov, 2010: Deriving an effective lake depth from satellite lake surface temperature data: a feasibility study with MODIS data, Boreal Environ. Res., 15(2), 178-190.

132 references, page 1 of 9
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