Sea Floor Temperature Modeling

How much gas you can transport is related to the temperature of the gas, which in turn is related to the temperature of the sea. And here is the link to oceanography: If you want to know how much gas you can sell, you must know the temperature of the sea floor. There is a widespread misconception that the temperature of the sea bed is constant; it is not in any way correct for The North Sea.

Illustration of seasonal variations in bottom temperature in The North Sea. The model is 4 - dimensional (3 spatial coordinates x, y, z, and time). To visualize bottom temperature the upper water layers is removed in parts of the figure. The clock in the upper left corner shows the corresponding month.

Illustration of seasonal variations in bottom temperature in The North Sea. The model is 4 – dimensional (3 spatial coordinates x, y, z, and time). To visualize bottom temperature the upper water layers is removed in parts of the figure. The clock in the upper left corner shows the corresponding month.

Increased capacity of gas transport in pipes

The ocean temperature at the sea floor is essential for capacity calculations through its impact on the gas temperature, and thereby the gas volume. In 2005 Gassco in association with Polytec introduced an arithmetic model based on the major weather forecasting models from the UK Met Office which with a high degree of accuracy calculates the temperature in real time and also forecasts the future. We are now developing a method to improve forecasts further, especially in terms of sea floor temperature. The method is so-called data-assimilation, i.e. a mixture of observations and models. The project has been conducted in cooperation with Gassco, who will apply the results as input to their gas flow model.