Outline

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

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Horizontal and vertical winds

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Cloudbase (LCL)

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Sloped interface,shallow inflow

Erect interface,deeper inflow

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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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data: 18 july 01flight: 15:00 UTC

water content in g/m3

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Water Content (g m-3)

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data: 18 july 01flight: 15:00 UTC

cloud nuclei in g/m3

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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

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Questions?