Trajectories of air origin for the Arctic Ocean 2018 expedition using the LAGRANTO model

Heini Wernli

Backward trajectories from along the ship track, with Swedish icebreaker Oden during the Arctic Ocean 2018 expedition in the central Arctic Ocean, August and September 2018.

The trajectories were calculated with the LAGRANTO Lagrangian analysis tool and the European Centre for Medium-Range Weather Forecasts (ECMWF) operational analysis fields.

These data can be used to determine the air origin at various pressure levels above the ship.

Citation

Heini Wernli (2022) Trajectories of air origin for the Arctic Ocean 2018 expedition using the LAGRANTO model. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/oden-ao-2018-trajectories-eth-1

References

Sprenger M, Wernli H (2015) The LAGRANTO Lagrangian analysis tool - version 2.0. Geosci. Model Dev. 8:2569⁠ – ⁠2586. https://doi.org/10.5194/gmd-8-2569-2015

Baccarini A, Karlsson L, Dommen J, Duplessis P, Vüllers J, Brooks IM, Saiz-Lopez A, Salter M, Tjernström M, Baltensperger U, Zieger P, Schmale J (2020) Frequent new particle formation over the high Arctic pack ice by enhanced iodine emissions. Nature Communications 11:4924. https://doi.org/10.1038/s41467-020-18551-0

Karlsson et al. (2022) manuscript in review

Data description

Backward trajectories from the ship track were calculated with LAGRANTO and ECMWF operational analysis fields at ETH Zurich for the MOCCHA campaign in summer 2018.

Hourly trajectory files (each 10 days backward calculations) and one readme-file are provided in one zip-folder. The hourly trajectory files (lsl-data files) are plain text files. Each block within the lsl-file contains one trajectory for various pressure levels. The readme-file gives details on the provided variables such as time, longitude, latitude and pressure of each trajectory (including units). Further details on the variables are provided at the ECMWF UERRA archive.

For more details see Karlsson et al. (2022) and Baccarini et al. (2020).

Comments

Input data for the calculations were collected during the Arctic Ocean 2018 expedition on board the Swedish icebreaker (I/B) Oden, which was organized by the Swedish Polar Research Secretariat.

Ship track data from the expedition is available in the Navigation, meteorological and surface seawater data from the Arctic Ocean 2018 expedition.