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Mount Tamalpias Mobile Transect. Chris Stumpf Brittani Ryan Denise Balukas. Mill Valley and Mount Tam. Mill Valley elevation is 10 meters ( 32 feet ) East Peak elevation is 781 meters ( 2570 feet ). The mobile transect route. GPS. Mapview.

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mount tamalpias mobile transect
Mount Tamalpias Mobile Transect

Chris Stumpf

Brittani Ryan

Denise Balukas

mill valley and mount tam
Mill Valley and Mount Tam

Mill Valley elevation is 10 meters ( 32 feet )

East Peak elevation is 781 meters ( 2570 feet )


Advantages of using a mobile transect to collect data:

Ability to take direct measurements.

Ability to collect data from many points along the route of transect in order to measure the temperature profile of the mountain valley system.

Disadvantages of mobile profiling:

Solar heating may influence measurements due to the time it takes to complete the transect.

No direct route up the mountain, data collected from eastern and western sides of the mountain.

mobile transect vehicle
Mobile Transect vehicle

Simple design of the roof rack and PVC pipe to attach instruments to the vehicle.

Anyone can make this at home!!!

the plan
The Plan
  • Four transects
  • 7am, 10:30am, 3:30pm, 7pm
  • Collected data from datalogger at the top and bottom of the mountain after every trip
  • Checkpoints along transect

-CR1000 Datalogger

-Thermistor/Hygristor (HMP45C)


-Barometric Pressure Sensor(CS106)

-Trimble GPS

temperature profile
Temperature Profile


Geopotential height (m) vs. Temperature (C)

Red: 7:00AM, Pink: 7:00PM, Blue: 10:30AM, Green: 3:30PM

temperature inversion
Temperature Inversion

temperature variation with height up the mountain
Temperature variation with height(Up the mountain)


Geopotential height (m) vs. Temperature (C)


potential temperature with height down the mountain
Potential Temperature with height(Down the mountain)


Geopotential height (m) vs. Potential temperature (K)


potential temperature with pressure
Potential Temperature with Pressure


Pressure (mb) vs. Potential temperature (K)