Wind and Weather Data and Preliminary Results

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Wind and Weather Data and Preliminary Results
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Outline

• Motivations and Objectives
• What has been done?
• Street level wind direction vs. synoptic wind
  direction
• Conclusion Future Work

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1. Motivations

• How does the horizontal transport compares with
  the vertical mixing?
• How do they relate with the synoptic conditions?

Objectives

• How does the wind direction at the street level
  relate to the synoptic wind direction?
• How does the wind speed at the street level
  relate to the synoptic wind speed?

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2. What has been done?

• Sonic anemometer measurements at 6 locations at
  the street level 2 reference wind speed
  measurements (AWS sonic).
• Complete data check preliminary analysis for
  Site 1, Site 2, Site 5 (basement), reference
  sonic (roof) and reference AWS (roof).
• data are available as 10min averages on the
  DAPPLE web site
• Partial data check for Site 4 (lower and upper)
  and Site 5 (roof) (Leeds).

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3. Street level wind direction vs.synoptic wind
direction
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Synoptic conditions- AWS, 27/05/2003 to
21/05/2003-
Pdf of Synoptic Wind direction
Pdf of velocity magnitudes
?
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Synoptic Wind Regime Definition
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Synoptic Wind Regimes per day
Regime C (SSW) 29/04/2003 30/04/2003 01/05/2003 02
/05/2003 07/05/2003 12/05/2003 15/05/2003 16/05/20
03 19/05/2003
Regime A (WNW) 06/05/2003 08/05/2003 13/05/2003
14/05/2003
Transitional AC 09/05/2003 20/05/2003 21/05/2003
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Regime A 06/05/2003
WNW winds
Pdf_direction_20 Hz data
Site 4 -lower-
Site 1
Site 2
10 minutes averages
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02/05/2003 Regime C
SWS winds
Site 1
Site 2
Site 3
Pdf_direction 10 Hz data
10 minutes averages
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Vortex street canyon?
Gloucester street site 4 lower
Pdf_wind magnitude
updraft
Characteristic for regime AC
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Street wind direction vs. Street wind
direction(summary)
Regime A
Regime C
Channelling effect
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4. Conclusions Future work

• The horizontal transport seems to be dominated
  by the channelling effect.
• The vertical transport might be dominated by
  street canyon vortex?

• Street level wind speeds vs. synoptic wind
  speeds
• To quantify the vertical transport (Gloucester
  Place Marylebone) Leeds anemometers
• To perform spectral analysis (wavelets analysis?)