Embedded below is a Google Documents spreadsheet list of metrics that were discussed at the first meeting. Metrics were assigned to a subjective category (green/yellow/red) by TWDIP participants based on a combination of their robustness and how well established their relation is to the Hadley cell edge. “Green light” metrics were considered the most robust and/or well established within a given category. Some metrics were assigned yellow or red because they are redundant with a better-established metric within a given category.
It was agreed that these “green light” metrics would be the focus of further study and documentation. As a result, TWDIP members have created the TropD software package to compute tropical width metrics in a consistent manner. The TropD software package is open source and freely available at Ori Adam’s webpage. A paper describing TropD was submitted to the journal Geoscientific Model Development in May 2018.