Low-Level-Jet and Inversion statistics for Weddell Sea region of Antarctica

• Main Authors: Zentek, Rolf, Heinemann, Günther
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Antarctica; Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); File content; inversion; low level jet; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158; Weddell_Sea; Weddell Sea; wind; Arctic; Antarctic; Weddell; Antarc*; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.940364; https://doi.org/10.1594/PANGAEA.940364

This data set is a climatology (2002–2016) of low level jet (LLJ) and inversion parameters for the Weddell Sea region of Antarctica. Mean (Summer=April-Sept., Winter=Dez.-Jan., Annual) values were computed from hourly COSMO-CLM model output. To detect a LLJ the lowest 1 km of the atmosphere was searched for a wind maximum (>2m/s than above and below) and the following parameters were taken: height (m) and wind speed (m/s) of the wind maximum, relative wind speed increase (compared to above and below), and the difference (LLJ-height minus near-surface-height) of potential temperature (K) and wind direction (°). To detect an inversion the lowest 1 km of the atmosphere was searched for the point where the potential temperature gradient dropped below 2 K/100 m and the following parameters were taken: height (m) of the inversion and strengh (K) defined as difference of potential temperature (inversion-height minus near-surface-height). The frequency (%) gives fraction of time a LLJ / inversion was detected. Furthermore the dataset of the mean wind field at 10 m above ground was added. For more detail and the exact description on the search algorithm see doi:10.3390/atmos12121635. For more details on the simulation see doi:10.5194/gmd-13-1809-2020.