ANUClimate collection

The daily and monthly climate variables contained herein have been generated using ANUClimate 1.0 (though ANUClimate 1.1 data is available for most daily products). This is a spatial model, developed by Michael Hutchinson, that integrates a new approach to the interpolation of Australia’s national point climate data to produce climate variables on a 0.01° longitude/latitude grid. Most climate values have been modelled by expressing each value as a normalised anomaly with respect to the gridded 1976-2005 mean. These means and anomalies were all interpolated by trivariate thin plate smoothing spline functions of longitude, latitude and vertically exaggerated elevation using ANUSPLIN Version 4.5, with additional dependences on proximity to the coast for the temperature and vapour pressure variables. Station elevations for the gridded temperature and vapour pressure variables were obtained from 0.01° local averages of grid values from the GEODATA 9 second DEM version 3. Station elevations for the gridded rainfall and pan evaporation variables were obtained from 0.05° local averages of grid values from the GEODATA 9 second DEM version 3.

本数据集包含的日、月气候变量均通过ANUClimate 1.0生成（多数日尺度产品可获取ANUClimate 1.1版本数据）。该模型由Michael Hutchinson开发，是一款空间插值模型，通过整合澳大利亚国家级点位气候数据的新型插值方法，可在0.01°经纬度网格上生成气候变量。多数气候数值以1976-2005年的网格化气候均值为基准，通过将各数值转换为归一化距平的方式进行建模。上述均值与距平均通过ANUSPLIN 4.5版本的三变量薄板平滑样条函数完成插值，插值变量涵盖经度、纬度与经垂直放大处理的高程，其中温度与水汽压变量还额外考虑了海岸邻近度的影响。网格化温度与水汽压变量的站点高程数据，取自GEODATA 9秒数字高程模型版本3（GEODATA 9 second DEM version 3）的0.01°局部网格平均值；网格化降水与蒸发皿蒸发量变量的站点高程数据，则取自该GEODATA 9秒数字高程模型版本3的0.05°局部网格平均值。