Arctic Research Collaboration for Radiosonde Observing System Experiment (ARCOSE)

Arctic Research Collaboration for Radiosonde Observing System
Experiment (ARCROSE)
Marion Maturilli (1), Roland Neuber (1), Klaus Dethloff (1), Markus Kayser (1), Jun Inoue (2,3),
Alexander Makshtas (4)
1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
2 National Institute for Polar Research, Japan
3 Japan Agency for Marine-Earth Science and Technology, Japan
4 Arctic and Antarctic Research Institute, St. Petersburg, Russia

The Arctic Research Collaboration for Radiosonde Observing System Experiment (ARCROSE) is
intended as a pilot study, combining intensified radiosonde observations at 3 central Arctic sites (NyÅlesund,
Tiksi, and the RV Mirai placed at 77.5N, 173W) during a 4-week campaign period in
September 2013. The effect of the intensified observations on data assimilation will be evaluated to
potentially propose a future observing network, leading to a better understanding of the uncertainty of
the Arctic atmospheric circulation. The activity contributes to the preparation phase of the Year of
Polar Prediction (YOPP) 2017/2018, which is intended as intensive observational and modelling
period to advance polar prediction capabilities.

During the intensive core period between 10 and 24 September, there will be 6 radiosonde launches
per day (6, 9, 12, 15, 18 and 00 UTC) in Ny-Ålesund, and 8 [4] launches per day from RV Mirai
[Tiksi], respectively. The additional radiosonde data are subject to data assimilation by the Earth
Simulator (Observing System Experiment). Emphasis of the analyses will be on the Arctic Ocean
region where Arctic cyclones frequently pass. The higher observation frequency is expected to
improve both numerical weather prediction and reanalyses, allowing to determine predictability and
identify key sources of forecast errors in polar regions.

ARCROSE is a cooperation of the Alfred Wegener Institute Helmholtz Centre for Polar and Marine
Research (AWI), the Japanese National Institute of Polar Research (NIPR), the Japan Agency for
Marine-Earth Science and Technology (JAMSTEC), and the Russian Arctic and Antarctic Research
Institute (AARI).

topic: monitoring activities
presentation preference: poster

Read more here: http://www.jamstec.go.jp/e/about/press_release/20130307/