Global Atmospheric Rivers catalog for ERA5 reanalysis ...

• Main Authors: Lauer, Melanie, Mech, Mario, Guan, Bin
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: atmospheric river; ERA5; Date/time start; Date/time end; Binary Object; Binary Object File Size; Arctic Amplification AC3; Arctic
• Online Access: https://dx.doi.org/10.1594/pangaea.957161; https://doi.pangaea.de/10.1594/PANGAEA.957161

The dataset contains hourly detected Atmospheric Rivers (ARs) for ERA5 reanalysis (1979 – 2021). For the detection of ARs, the global detection algorithm introduced by Guan and Waliser (2015) (first version v1), and refined by Guan et al. (2018) (second version v2) is applied. The algorithm considers different requirements: the intensity of integrated water vapor transport IVT, direction, and geometry (described in detail by Guan and Waliser (2015), Guan et al. (2018), and Lauer et al. (2023)). (1) IVT intensity: The IVT must exceed the 85th percentile of IVT for each grid cell and the lower limit of 100 kg m⁻¹ s⁻¹. (2) IVT direction: The IVT direction at individual grid cells have to be coherent, and the direction of object-mean IVT has to be within 45° of the AR shape orientation, with an appreciable poleward component. (3) Geometry: The length has to be larger than 2000 km, and the length-to-width ratio should be higher than two. In case an object exceeds the IVT percentile, but (2) and (3) are not ...