Terry Fox Ice Resistance Tests - Phase 2 ITTC Experimental Uncertainty Analysis Initiative

This is a part of the Experimental Uncertainty Analysis (EUA) research program to develop an ITTC procedure for ice tank testing. The test program and test results for phase ll are presented in this report. All tests were performed using a model for a Canadian icebreaker "Terry Fox" (Standard IMD Icebreaker model, Scale 1:21.8). The test matrix included two (2) different types of experiments: These are: 1. Resistance experiments in ice (tests in unbroken level ice, tests in presawn ice sheets, and tests in broken ice sheets. 2. Resistance experiments in open water. The experimental program is described in this report.NRC publication: Ye

Quantitative mapping of global land degradation using Earth observations

Land degradation is a global issue on par with climate change and loss of biodiversity, but its extent and severity are only roughly known and there is little detail on the immediate processes – let alone the drivers. Earth-observation methods enable monitoring of land degradation in a consistent, physical way and on a global scale by making use of vegetation productivity and/or loss as proxies. Most recent studies indicate a general greening trend, but improved data sets and analysis also show a combination of greening and browning trends. Statistically based linear trends average out these effects. Improved understanding may be expected from data-driven and process-modelling approaches: new models, model integration, enhanced statistical analysis and modern sensor imagery at medium spatial resolution should substantially improve the assessment of global land degradation