CESM Models

CESM1.1: River Transport Model (RTM)

General Overview

The RTM was developed to route total runoff from the land surface model to either the active ocean or marginal seas which enables the hydrologic cycle to be closed (Branstetter 2001, Branstetter and Famiglietti 1999). This is needed to model ocean convection and circulation, which is affected by freshwater input. It also provides another method of diagnosing the performance of the land model because the river flow can be directly compared to gauging station data (e.g., Dai and Trenberth 2002).