IPCC Fourth Assessment Report (AR4) Observed Climate Change Impacts Database

The Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) Observed Climate Change Impacts Database contains observed responses to climate change across a wide range of systems as well as regions. These data were taken from the Intergovernmental Panel on Climate Change Fourth Assessment Report and Rosenzweig et al. (2008). It consists of responses in the the physical, terrestrial biological systems and marine-ecosystems. The observations that were selected include data that demonstrate a statistically significant trend in change in either direction in systems related to temperature or other climate change variable, and the is for at least 20 years between 1970 and 2004, although study periods may extend earlier or later. For each observation, the data series is described in terms of system, region, longitude and latitude, dates and duration, statistical significance, type of impact, and whether or not land use was identified as a driving factor. System changes are taken from ~80 studies (of which ~75 are new since the IPCC Third Assessment Report) containing more than 29,500 data series. Observations in the database are characterized as a "change consistent with warming" or a "change not consistent with warming", based on information from the underlying studies.

《政府间气候变化专门委员会第四次评估报告（AR4）观测到的气候变化影响数据库》收录了广泛系统及区域范围内对气候变化的观测响应。这些数据源自政府间气候变化专门委员会第四次评估报告以及Rosenzweig等人（2008年）的研究。数据库内容涵盖物理、陆地生物系统和海洋生态系统对气候变化的响应。选定的观测数据展示了与温度或其他气候变化变量相关的系统中变化趋势的统计显著性，且这一变化趋势在1970年至2004年间至少持续了20年，尽管研究周期可能提前或延后。对于每个观测，数据系列均以系统、区域、经纬度、日期和持续时间、统计显著性、影响类型以及是否将土地利用识别为驱动因素等术语进行描述。系统变化的数据来源于约80项研究（其中约75项自政府间气候变化专门委员会第三次评估报告以来为新增），包含超过29,500个数据系列。数据库中的观测数据根据其背后的研究信息，被定义为‘与增温一致的变革’或‘与增温不一致的变革’。