Theo Brandsma Royal Netherlands Met e orological Institute (KNMI)
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Theo Brandsma Royal Netherlands Meteorological Institute (KNMI) 6th Seminar for homogenization and qualtity control in climatological databases COST-HOME meeting Budapest, Hungary, 26-30 May 2008 Understanding of inter-site temperature differences at the KNMI terrain in De Bilt (the Netherlands)
description
Understanding of inter-site temperature differences at the KNMI terrain in De Bilt (the Netherlands). Theo Brandsma Royal Netherlands Met e orological Institute (KNMI). 6th Seminar for homogenization and qualtity control in climatological databases COST-HOME meeting - PowerPoint PPT Presentation
Transcript of Theo Brandsma Royal Netherlands Met e orological Institute (KNMI)
Theo Brandsma
Royal Netherlands Meteorological Institute (KNMI)
6th Seminar for homogenization and qualtity control in climatological databases
COST-HOME meeting
Budapest, Hungary, 26-30 May 2008
Understanding of inter-site temperature differences at
the KNMI terrain in De Bilt (the Netherlands)
Contents
Background and methodology
Results
Overview of causes for inter-site temperature
differences
Background
KNMI terrain at De Bilt
Background and methodology
KNMI terrain at De Bilt
Background and methodology
(After the renovation of the nature area in Sep/Oct 2004)
Obstacle altitudeBackground and methodology
InstrumentsBackground and methodology
Daily maximum temperature
Results
Renovation
Daily minimum temperature
Results
Renovation
Diurnal cycle
Results
Diurnal cycle
Results
Wind direction dependence
Results
Overview of causes for inter-site temperature differences
1. Advection of warm/cold air related to local soil type/groundwater level differences
2. Local stability differences (especially for W < 1.0 m/s)
3. Screen ventilation differences (radiation error)
4. Sky-view factor/horizon differences
5. Radiation by surrounding objects
6. Instrumental errors
