The Northern Temperature Problem
and
the new snow-forest-surface parametrization
Stefan Gollvik, SMHI
Patrick Samuelsson, SMHI
Ernesto Rodriguez, INM
Sander Tijm, KNMI
http://netfam.fmi.fi ...
workshops ... Nordic Temperature Problem, Sodankylä Summer School
Renewal of the ISBA surface scheme
- to solve diffusion equation in soil instead of force-restore
- to handle snow in forest and open land with the tile approach
- to include canopy air temperature and fluxes inside the canopy etc
Situation
- a preliminary code within the last HIRLAM 6.4.0 version exists
and is being tested in parallel model experiments
- positive results from single-column HIRLAM comparisons
- no complete analysis of full model experiment results yet
- technical problems remain within the HIRLAM system
Important and urgent thing for
the operational HIRLAM
Development of the moist CBR-turbulence
scheme
Sander Tijm, KNMI
Bent Hansen Sass, DMI
- renewal of the TKE-based HIRLAM turbulence scheme to use moist
conservative variables
- connected to the problem of shallow convection parametrization
and boundary layer clouds
Situation
- a preliminary code within the future fortran-90-based common
HIRLAM-ALADIN physics exists
- to be tested within the common framework
Important current thing in the development of HIRLAM-ALADIN
physics
Implementation of
the recent theoretical ideas for the HIRLAM stable boundary
layer parametrizations
Veniamin Perov, SMHI
Sergei Zilitinkevich, UH
Ivan Mammarella, FMI-UH
Several published and submitted publications!
Important thing in the further development of HIRLAM-ALADIN physics
To be discussed today!
Towards
three-dimensional turbulence parametrizations
Veniamin Perov, SMHI
ALADIN colleagues
Important long-term direction within the mesoscale HIRLAM-ALADIN
physics.
Systematic thinking, planning and practical work to be started.
Recoding of the
HIRLAM physical parametrizations
- To clean HIRLAM code of physical parametrizations for the use in
common IFS framework
- Coding in Fortran 90, cleaning, streamlining
- Three basic components: clouds and convection, turbulence,
radiation + externalization of the surface code (parametrizations,
surface analysis, surface description).
HIRLAM physics team
http://hirlam.fmi.fi/cleanphys
Basic elements recoded, testing to start 2006. Externalization of
surface code during 2006.
Systematic analysis
and comparison of NWP results to Sodankylä measurements
Everyday operational comparison of HIRLAM and ARPEGE results to
Sodankylä meteorological mast observations at
http://fminwp.fmi.fi
Markku Kangas FMI
Eric Bazile, Meteo France
Cisco de Bruijn, KNMI
Data and tools being collected for validation of parametrization
schemes, using Sodankylä
- aerological sounding data
- mast measurements: temperature,
humidity, wind, heat and radiation fluxes
- SYNOP observations and high
temporal resolution AWS data
- surface, ground and snow
temperatures
- ceilometer data for cloudiness
Several independent studies ongoing by different people. Data and tools
hidden in different corners.
Timo Vihma, wintertime temperatures and energy balance (HIRLAM, ongoing)
Zhenya Atlaskin, wintertime temperatures and energy balance (HIRLAM,
ongoing)
Eric Bazile, wintertime temperatures and energy balance (ARPEGE, done
and ongoing)
Priit Tisler, wind (HIRLAM, done)
Nastya Senkova, radiation balance under clear and cloudy sky (HIRLAM,
to be started)
+ surely many others, at least interested
To be discussed today!
HIRLAM point of view on the expected outcome of the present-day
meeting
- Review and discussion of the ongoing studies - Continuation of the Nordic
Temperature Meeting and Sodankylä Summer School 2005 discussions. Collecting relevant references of
published works.
- Plans and priorities of the future studies, especially in the area
of application of the new theoretical developments for HIRLAM
stable boundary layer parametrizations
- Agreement and plan how
to create a freely available, regularly updated centre of
Sodankylä observational data and related tools, with descriptions