Embed Size (px)
Citation preview
The Scientific Method: Real examples
Monika V SikandPh.d Student
Stevens Institute of TechnologyDepartment of Physics
Light and Life LaboratoryHoboken.
QuickTime™ and a decompressor
are needed to see this picture.
Overview
• Stevens light and life laboratory research
• Scientific methods review
• Application of scientific methods
• Conclusion
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Research at Light and Life Laboratory
QuickTime™ and a decompressor
are needed to see this picture.Use of satellite data for retrieval of atmospheric and surface properties.
Research at Light and Life Laboratory
Remote sensing of ocean color.QuickTime™ and a
decompressorare needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
The Scientific method steps
• Observation• Question• Hypothesis• Experiment• Data collection• Conclusion
Observation
QuickTime™ and a decompressor
are needed to see this picture.
Global Temperature
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Green house gases
QuickTime™ and a decompressor
are needed to see this picture.
Melting ice
QuickTime™ and a decompressor
are needed to see this picture. QuickTime™ and a decompressor
are needed to see this picture.
Rising sea levels
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Hurricanes
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
So what do we observe ?????
Global Warming & Climate Change
QuickTime™ and a decompressor
are needed to see this picture.QuickTime™ and a
decompressorare needed to see this picture.
Do you have a problem or Question?
Question ???????
QuickTime™ and a decompressor
are needed to see this picture.
Think of an idea !!!!!!!!
QuickTime™ and a decompressor
are needed to see this picture.
Let’s study the Earth’s radiation budget
Radiation incident from Sun - radiation reflected from earth
Radiation budget
Hypothesis: A scientific educated guess
If radiation budget increases then Globe is warming.
Plan the experiment
Investigation !!!!!!!!!!!!!!!!
Tethered Balloon system
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Ny-Alesund Svalbard, Norway (78.91N, 11.91E) in May/June 2008
Data Collection
Quantitative(numerical) and Qualitative(descriptive)
Quantitative dataEnergy (Mean Intensity)
QuickTime™ and a decompressor
are needed to see this picture.
Qualitative dataCloud particles shape
QuickTime™ and a decompressor
are needed to see this picture.
Analysis of results
Cloud model
QuickTime™ and a decompressor
are needed to see this picture.
presence of clouds influences the mean intensity.
Results
The mixed phase clouds increases the mean intensity and hence the radiation budget.
QuickTime™ and a decompressor
are needed to see this picture.
Conclusion
Mixed phase(both ice and water)clouds increase the radiation budget in Arctic
If radiation budget increases then Globe is warming.
Publication of results
“Optical properties of mixed phase boundary layer clouds observed from a tethered balloon platform in the Arctic” M.Sikand et al.
Journal of Quantitative Spectroscopy & Radiative Transfer 111 (2010) 1921–1930
Interesting Links
http://climate.nasa.gov/kids/ClimateTimeMachine/climateTimeMachine_kids.cfm
http://climate.nasa.gov/kids/climateTales/index.cfm
The End
Thank you
