1. Climate change research often relies on downscaled general circulation models (GCM), projections of future scenarios that are used to build ecological and evolutionary models. With more than 35 different GCMs widely available at a resolution of 10 km and finer, standardized methods to understand the differences among GCM projections in a region of interest and to choose which GCM to use for analysis are essential to maximize relevance to policy and to assure a proper treatment of uncertainty.
2. To help researchers and policymakers understand and select form the range of available GCM scenarios, we have developed GCM compareR, an open‐source web application written in r using shiny. GCM compareR is freely accessible with an easy interactive user interface, has preloaded climate scenario data to increase the speed of analysis and is fully documented to ensure reproducibility. Users of the application need no prior experience in coding.
3. GCM compareR is designed to compare GCMs and different climate change scenarios to provide full, documented exploration of the possible alternative futures from within the range of projections in CMIP5 climate models. Designed with a wide group of users in mind, including ecologists, conservationists and policymakers, the application is designed to adapt analyses to any geographic area of interest. Results are provided as figures, tables and maps that clearly communicate the differences among model projections for the region. Additionally, the tool allows for the export of a report that records the parameter choices and results of a session, along with contextual information, to make the analysis fully transparent and replicable.

中文翻译：

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GCM compareR：一个网络应用程序，用于评估差异并协助选择用于气候变化研究的一般循环模型

1. 气候变化研究通常依赖缩小规模的总环流模型（GCM），即用于构建生态和进化模型的未来方案的预测。拥有超过35种不同的GCM（分辨率为10 km或更精细），标准化的方法对于理解感兴趣区域中GCM预测之间的差异以及选择用于分析的GCM至关重要，这对于最大化与政策的相关性并确保正确处理不确定性。
2. 为了帮助研究人员和政策制定者理解和选择可用的GCM方案范围，我们开发了GCM比较R，这是一种使用r使用shiny编写的开源Web应用程序。GCM compare R可以通过简单的交互式用户界面免费访问，并预先加载了气候情景数据以提高分析速度，并且有完整的文档记录以确保可重复性。应用程序的用户不需要任何编码经验。
3. GCM compare R旨在比较GCM和不同的气候变化情景，以从CMIP5气候模型的预测范围内提供完整的，有据可查的替代未来的探索。设计该应用程序时考虑到包括生态学家，保护主义者和政策制定者在内的广泛用户，该应用程序旨在使分析适应任何感兴趣的地理区域。结果以图形，表格和地图的形式提供，清楚地传达了该地区模型预测之间的差异。此外，该工具还允许导出报告，该报告记录会话的参数选择和结果以及上下文信息，以使分析完全透明和可复制。