Sea Level Datum of 1929
When people talk about "sea level datum of 1929," they are referring to a way scientists measured and compared sea levels around the world back in 1929.
To understand what this means, first you need to know that sea levels can change over time. This can be due to factors like the movement of tectonic plates, changes in the amount of water in the oceans, and melting of glaciers and ice caps.
Now, in order for scientists to track changes in sea level over time and compare them around the world, they need a standard reference point that they can all use. This is where the "datums" come in - they are basically a set of coordinates that scientists agree to use as their reference point.
The "sea level datum of 1929" was one such reference point. It was originally established by the National Geodetic Survey in the United States, and was based on measurements taken at a specific location on the coast of California.
This datum was used for many years to track sea level changes around the world, but eventually it was determined that it had some limitations. For one thing, it only took into account sea level changes along the coast of California, so it wasn't representative of global sea level trends. Additionally, it didn't account for things like land subsidence (when the ground sinks below sea level), which can also affect sea level measurements.
Today, there are newer, more accurate datums that are used to measure sea level changes around the world. But the sea level datum of 1929 is still important historically, as it was one of the first standardized ways that scientists tried to measure and compare sea levels around the world.
To understand what this means, first you need to know that sea levels can change over time. This can be due to factors like the movement of tectonic plates, changes in the amount of water in the oceans, and melting of glaciers and ice caps.
Now, in order for scientists to track changes in sea level over time and compare them around the world, they need a standard reference point that they can all use. This is where the "datums" come in - they are basically a set of coordinates that scientists agree to use as their reference point.
The "sea level datum of 1929" was one such reference point. It was originally established by the National Geodetic Survey in the United States, and was based on measurements taken at a specific location on the coast of California.
This datum was used for many years to track sea level changes around the world, but eventually it was determined that it had some limitations. For one thing, it only took into account sea level changes along the coast of California, so it wasn't representative of global sea level trends. Additionally, it didn't account for things like land subsidence (when the ground sinks below sea level), which can also affect sea level measurements.
Today, there are newer, more accurate datums that are used to measure sea level changes around the world. But the sea level datum of 1929 is still important historically, as it was one of the first standardized ways that scientists tried to measure and compare sea levels around the world.