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1st UNSTABLE Science Workshop18-19 April 2007
Outline
Taylor• Factors important for CI• Science Question 1• What do we need to resolve processes?• Required Instrumentation and deploymentSills• Further instrumentation and deployment
strategies (ATMOS, AMMOS, Aircraft)
EC ATMOS Surface Mesonet Stations
O3 sensor?
PM sensor?
Additional:
WindDeltaT
T / RH + Fast TPrecip
Pressure
Cell antenna
Solar Panel
DeltaTLogger
Solar Radiation
Why collect 1 min avg mesonet data?
4 boundary passages within ~ 1 hr, 3 in 18 min!
Sydney 2000 Project 1 min average surface station data
How will the ATMOS units be used?
• Use both grid and line siting approaches
• Collect data as 1 min averages
• Augment mesonet with stations from other networks
PM sensor?
Photo / video
Additional:
EC AMMOS Mobile Unit
Wind
GPS
Logger Pressure
T / RH + Fast T (ventilated)
Compass
Rugged Laptop + Backup
Are hi-res / fast-response obs needed?
How will the AMMOS unit be used?
• Collect data at 1 s intervals
• Measure gradients across boundaries (met and land use)
• Fill in holes in mesonet as needed
What are the benefits of aircraft obs?
Twin Otter during ELBOW 200118 July 1751 UTC
0
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1 100
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2 000
heig
htin
mm
sl
140 120 100 80 60 40 20 0
space in km
6 ms-1
18julymorning
ErieHuron
Horizontal and vertical winds
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heig
htin
mm
sl
140 120 100 80 60 40 20 0
space in km
6 ms-1
18julymorning
ErieHuron
Cloudbase (LCL)
No CuBuilding CuNo Cu
Sloped interface,shallow inflow
Erect interface,deeper inflow
12 1213 13 13 13
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18 18 18
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2122 22 22
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heig
htin
mm
sl
125 100 75 50 25 0
125 100 75 50 25 0
space in km
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data: 18 july 01flight: 15:00 UTC
unheated starboard temperature in degrees( )30s avg,1/d^2 interpolation
Temperature (C)
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1010
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heig
htin
mm
sl
125 100 75 50 25 0
125 100 75 50 25 0
space in km
5
6
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data: 18 july 01flight: 15:00 UTC
water content in g/m3
( )30s avg,1/d^2 interpolation
Water Content (g m-3)
5000 500
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1000015
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1 400
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1 000
1 200
1 400
1 600
1 800
heig
htin
mm
sl
125 100 75 50 25 0
125 100 75 50 25 0
space in km
0
5 000
10 000
15 000
20 000
25 000
30 000
35 000
40 000
data: 18 july 01flight: 15:00 UTC
cloud nuclei in g/m3
( )30s avg,1/d^2 interpolation
Cloud Nuclei (g m-3)
Skew-T Diagram
Aircraft descending profile over land
TTd
Skew-T Diagram
Aircraft descending profile over water
TTd
Jun 19 18Z
Ascending profile over land vs. rawinsonde data at ~same time
Vertical Wind
Incident Solar Radiation
Lake Huron
Aircraft about 300 m below cloud base, large updrafts beneath clouds.
Lake HuronLBF
Surface Temp
How would an aircraft be used?
‘Mesoscale Boundary’ flight path?
Ground
0
1 km
2 km
3 km
Questions?
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