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Measuring the Earth: The Science of Geodesy Series

This monthly series covers the how and why of geodesy.

January - What is Geodesy?

Geodesy is the science of measuring Earth's size, shape, orientation in space, and gravity field. [3.1 MB jpg] [8.4 MB pdf]

February - Earth on the Move

The motion of tectonic plates, along with erosion and deposition, alter Earth's surface, creating mountains and valleys and causing earthquakes. [2.5 MB jpg] [6.6 MB pdf]

March - Sea Level and Tides

Measuring global sea level requires monitoring both tides and vertical motion of landmasses. [3.2 MB jpg] [7.9 MB pdf]

April - Vegetation

Scientists can measure wavelengths of light either absorbed or reflected by green vegetation using remote sensing observations. [3.2 MB jpg] [8.1 MB pdf]

May - Navigation

GPS systems are practically synonymous with navigation, even more so with the rise of autonomous vehicles. [3.4 MB jpg] [8.1 MB pdf]

June - Earthquake Early Warning

Real-time GPS data, in combination with seismic instrumentation, allows scientists to detect earthquakes quickly and warn people of impending shaking. [2.5 MB jpg] [8.1 MB pdf]

July - Drought Monitoring

Snow cover, lake levels, soil moisture, and changes in groundwater level can all cause Earth's surface to move up or down. [3.5 MB jpg] [8.6 MB pdf]

August - Atmospheric Moisture

The amount of water vapor in the atmosphere determines the weather that may occur. [2.1 MB jpg] [5.5 MB pdf]

September - Gravity

Earth's gravity field changes from place to place depending, in part, on topography. [4.1 MB jpg] [9.8 MB pdf]

October - Timing and World Markets

GPS and financial markets, such as the New York Stock Exchange, have become intimately linked. [3.5 MB jpg] [8.8 MB pdf]

November - Polar Ice

Scientists monitor polar ice conditions through a number of geodetic observations. [1.7 MB jpg] [5.3 MB pdf]

Last modified: Thursday, 01-Nov-2018 18:55:09 UTC

 

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