Things owned by a human or animal can be indicated by the word whose (“My sister, whose car I am borrowing, comes home tomorrow.”) However, English has no word for things owned by an inanimate object. In these cases, the word whose can be used, although this usage is considered by some to be less formal. The alternative is to use the phrase of which. Using of which will require re-writing certain parts of the sentence, and even then, such a re-write is not always feasible.

The second chapter describes numerical prediction models used in Sweden today, whose accuracies contribute to the dependability of forecast products.

The second chapter describes numerical prediction models used in Sweden today, the accuracies of which contribute to the dependability of forecast products.