The ‘fast’ components of the coupling between the land surface model CABLE and the atmosphere within the Earth system model ACCESS

[摘要] The scientific and technical integrity of the coupling of the land surface model, CABLE, to the atmospheric model, UM, is critical for the current and longer-term use of the Australian Earth system model ACCESS. In 2016 a project was initiated to review, and if necessary correct, the current implementation of the coupling. While the scientific requirements of the CABLE, ACCESS and UM communities, in particular, were the primary focus of the review, consideration was given to technical issues.In its formative stage the project identified two substantive issues (concerning meteorological forcing and time-stepping of the energy balance) within the current implementation of CABLE-UM. This report documents progress towards implementing solutions to these two issues within CABLE and ACCESS. During the development and those solutions, further issues regarding the coupling of CABLE to the UM and, more generally, within the current CABLE code were identified. These arebriefly documented here. Solutions for the majority of the identified issues have been devised, implemented, where necessary extended to accommodate other advances to CABLE, and are now being tested by the wider CABLE community. If successful, these will form a substantive set of changes within the next generation of CABLE. Further effort is however needed to fully incorporate solutions to all the identified issues.Finally, a more extensive review of the formulation of a key component (turbulent exchange) of CABLE is presented. This illustrates that there significant inconsistencies within that component with, as yet, unknown consequences for the wider performance of CABLE. This has the potential to form a focus for future development and science enhancement of CABLE.

[发布日期] 2017-10-13 [发布机构] CSIRO

[学科分类] 地球科学(综合)