The Cirrus Guide II In-situ Aircraft Data Set

The Cirrus Guide II in-situ data set (see Krämer et al., 2016, 2020) contains cloud and trace gas observations in the UTLS (Upper Troposphere / Lower Stratosphere) from research aircraft on a flight by flight basis. The major parameters contained in the data set are: Total water content (TWC = ice for temperatures T < -38C, liquid or ice or a mixture between -38C - 0C, liquid for T > 0C), cloud particle number concentration N_cloud (physical state as for TWC), mean mass radius R_cloud, in-cloud as well as the clear sky relative humidity with respect to ice (RH_ice) and clear sky water vapor volume mixing ratios of H2O and O_3. Further, meteorological variables are included in the data set: Time, Temperature, potential Temperature, Pressure, Altitude, Latitude, Longitude, Latitude, vertical velocity. The complete in situ data set comprises 24 field campaigns described by Krämer et al. (2016) and Krämer et al. (2020). Note that there is a corrected data base available; please find the description in the respective tar-file (M. Krämer, 2023). Krämer, M., Rolf, C., Spelten, N., Afchine, A., Fahey, D., Jensen, E., Khaykin, S., Kuhn, T., Lawson, P., Lykov, A., Pan, L. L., Riese, M., Rollins, A., Stroh, F., Thornberry, T., Wolf, V., Woods, S., Spichtinger, P., Quaas, J., and Sourdeval, O.: A Microphysics Guide to Cirrus – Part II: Climatologies of Clouds and Humidity from Observations, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-40, in press, 2020. Krämer, M., Rolf, C., Luebke, A., Afchine, A., Spelten, N., Costa, A., Meyer, J., Zöger, M., Smith, J., Herman, R. L., Buchholz, B., Ebert, V., Baumgardner, D., Borrmann, S., Klingebiel, M., and Avallone, L.: A Microphysics Guide to Cirrus Clouds – Part 1: Cirrus types, Atmos. Chem. Phys., 16, 3463–3483, 2016.卷云指南II原位（in-situ）数据集（参考Krämer等人2016、2020年研究）包含了基于逐次飞行的科研飞机在UTLS（对流层上部/平流层下部，Upper Troposphere / Lower Stratosphere）中获取的云和痕量气体观测数据。该数据集涵盖的核心参数包括：总含水量（Total Water Content, TWC）：温度T＜-38℃时为冰相，-38℃至0℃时为液相、冰相或两相混合相，T＞0℃时为液相；云粒子数浓度（Cloud Particle Number Concentration, N_cloud），其相态分类规则与总含水量一致；平均质量半径（Mean Mass Radius, R_cloud）；云内及晴空条件下相对于冰的相对湿度（Relative Humidity with respect to Ice, RH_ice）；以及晴空条件下H₂O与O₃的水汽体积混合比。此外，数据集还包含以下气象变量：时间、温度、位温、气压、海拔、纬度、经度、纬度、垂直速度。完整的原位数据集包含Krämer等人（2016、2020）所描述的24次外场观测任务。 请注意，现有修正后的数据库可供使用；相关说明请查阅对应tar压缩包中的文档（M. Krämer，2023）。 Krämer, M., Rolf, C., Spelten, N., Afchine, A., Fahey, D., Jensen, E., Khaykin, S., Kuhn, T., Lawson, P., Lykov, A., Pan, L. L., Riese, M., Rollins, A., Stroh, F., Thornberry, T., Wolf, V., Woods, S., Spichtinger, P., Quaas, J., 与 Sourdeval, O.: 《卷云微物理学指南——第二部分：基于观测的云和湿度气候学》，《大气化学与物理讨论（Atmos. Chem. Phys. Discuss.）》，https://doi.org/10.5194/acp-2020-40，即将出版，2020年。 Krämer, M., Rolf, C., Luebke, A., Afchine, A., Spelten, N., Costa, A., Meyer, J., Zöger, M., Smith, J., Herman, R. L., Buchholz, B., Ebert, V., Baumgardner, D., Borrmann, S., Klingebiel, M., 与 Avallone, L.: 《卷云微物理学指南——第一部分：卷云类型》，《大气化学与物理（Atmos. Chem. Phys.）》，16卷，3463–3483页，2016年。