在密云状态下空中撒播液态二氧化碳驱云实验雷达实测数据集

暴雪是日本自然灾害的一种，大规模使用干冰或液态二氧化碳驱云是有效减轻大雪造成灾害的方法。为了实验人工干预天气驱云减灾的途径，本数据集是2014年1月14日在日本本州上空采用在浓密云天气状态下，飞机播撒液态二氧化碳的实验数据。该实验采用两个雷达摄像机记录。雷达获得的降水数据是在日本气象厅Radar-AMeDAS进行的数据处理。大气温度和气压数据是在飞机皮托管（流速计）测得。大气垂直温度变化是人工记录得到。液态二氧化碳播撒速率和飞机风速分别为35 g s-1和115 m s-1，撒播的路径方向与风向一致，确保实验不受其他因素干扰。实验环境是云层达到3公里厚，云层距离地面0.6千米。雷达获得的二个实验数据分别为播撒液态二氧化碳后监测到的20分钟内云层顶部至底部降水数据和24分钟内的降水总量监测到的实验数据。这套实验数据和实验方法证实采用液态二氧化碳影响天气的办法在上述条件下实施是可行的。数据采用.mpg格式存储。由两个数据文件组成。由于单个数据文件数据量比较大，压缩前总数据量为7.74GB（两个数据文件数据量分别为3.95GB和 3.79GB）。为了便于用户下载数据，用winRAR软件进行分卷压缩，两个数据文件压缩成两个数据文件组，两个数据文件组分别由12个分卷压缩文件组成，第一个数据文件组的分卷压缩文件命名为CloudObservedFromTheAircraft，从part01至part12。第二个数据文件组的分卷压缩文件命名为RadarOnBoard，从part01至part12。用户下载数据并解压缩时，需要把每一个数据文件组分卷压缩数据文件全部下载下来，并存放在同一个文件夹下，右键点击第一个数据文件（例如：CloudObservedFromTheAircraft.part01.rar或RadarOnBoard.part01.rar），进行解压即可。关联分析论文发表在杂志《Journal of Meteorological Research》2015年29卷第4期。

Blizzards are a type of natural disaster in Japan. Large-scale cloud seeding using dry ice or liquid carbon dioxide is an effective method to mitigate disasters caused by heavy snowfall. To experimentally explore approaches for artificial weather intervention via cloud seeding to reduce disaster losses, this dataset contains experimental data collected on January 14, 2014, over the main island of Honshu, Japan, under dense cloud conditions when liquid carbon dioxide was dispersed via aircraft.

Two radar cameras were employed in this experiment. Precipitation data acquired by the radars were processed using the Japan Meteorological Agency’s Radar-AMeDAS system. Atmospheric temperature and pressure data were measured by the aircraft’s pitot tube (flow meter). Vertical variations in atmospheric temperature were recorded manually. The seeding rate of liquid carbon dioxide and the aircraft’s wind speed were 35 g s⁻¹ and 115 m s⁻¹, respectively. The seeding path was aligned with the wind direction to eliminate interference from other factors during the experiment.

The experimental setup featured a 3-kilometer-thick cloud layer located 0.6 kilometers above the ground. The two datasets collected by the radars correspond to, respectively, the precipitation data monitored from the cloud top to the bottom within 20 minutes after liquid carbon dioxide seeding, and the total precipitation monitored over a 24-minute period.

This set of experimental data and the corresponding experimental methodology confirm that the approach of using liquid carbon dioxide to modify weather is feasible under the aforementioned conditions. The data are stored in .mpg format and consist of two primary data files. Given the large size of individual files, the total uncompressed data volume is 7.74 GB (the two files are 3.95 GB and 3.79 GB, respectively). To facilitate user downloads, the data were compressed into multi-part archives using WinRAR. The two primary data files were packaged into two archive groups, each containing 12 split compressed files. The first archive group is named *CloudObservedFromTheAircraft*, with split files ranging from part01 to part12. The second archive group is named *RadarOnBoard*, with split files ranging from part01 to part12.

When downloading and decompressing the data, users must download all split archive files of each archive group and store them in the same folder. Right-click the first archive file (e.g., CloudObservedFromTheAircraft.part01.rar or RadarOnBoard.part01.rar) to initiate decompression.

The associated analytical paper was published in *Journal of Meteorological Research*, Volume 29, Issue 4, 2015.