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The innovative strategies for observations in the arctic atmospheric boundary layer project (ISOBAR) unique finescale observations under stable and very stable conditions: Unique fine-scale observations under 3 stable and very stable conditions

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Authors

  • Stephan T. Kral
  • Joachim Reuder
  • Timo Vihma
  • Irene Suomi
  • Björn Maronga
  • Johannes Schwenkel

External Research Organisations

  • University of Bergen (UiB)
  • University of Oklahoma
  • Finnish Meteorological Institute
  • University of Tübingen
  • Ostwestfalen-Lippe University of Applied Sciences
  • Wageningen University and Research
  • A.M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences
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Details

Original languageEnglish
Pages (from-to)E218-E243
JournalBulletin of the American Meteorological Society
Volume102
Issue number2
Publication statusPublished - Feb 2021

Abstract

The Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer Program (ISOBAR) is a research project investigating stable atmospheric boundary layer (SBL) processes, whose representation still poses significant challenges in state-of-the-art numerical weather prediction (NWP) models. In ISOBAR ground-based flux and profile observations are combined with boundary layer remote sensing methods and the extensive usage of different unmanned aircraft systems (UAS). During February 2017 and 2018 we carried out two major field campaigns over the sea ice of the northern Baltic Sea, close to the Finnish island of Hailuoto at 65°N. In total 14 intensive observational periods (IOPs) resulted in extensive SBL datasets with unprecedented spatiotemporal resolution, which will form the basis for various numerical modeling experiments. First results from the campaigns indicate numerous very stable boundary layer (VSBL) cases, characterized by strong stratification, weak winds, and clear skies, and give detailed insight in the temporal evolution and vertical structure of the entire SBL. The SBL is subject to rapid changes in its vertical structure, responding to a variety of different processes. In particular, we study cases involving a shear instability associated with a low-level jet, a rapid strong cooling event observed a few meters above ground, and a strong wave-breaking event that triggers intensive near-surface turbulence. Furthermore, we use observations from one IOP to validate three different atmospheric models. The unique finescale observations resulting from the ISOBAR observational approach will aid future research activities, focusing on a better understanding of the SBL and its implementation in numerical models.

Keywords

    Arctic, Atmosphere, Boundary layer, Field experiments, Numerical analysis/modeling

ASJC Scopus subject areas

Cite this

Kral, ST, Reuder, J, Vihma, T, Suomi, I, Haualand, KF, Urbancic, G, Greene, BR, Steeneveld, GJ, Lorenz, T, Maronga, B, Jonassen, MO, Ajosenpää, H, Båserud, L, Chilson, PB, Holtslag, AAM, Jenkins, AD, Kouznetsov, R, Mayer, S, Pillar-Little, EA, Rautenberg, A, Schwenkel, J, Seidl, AW & Wrenger, B 2021, 'The innovative strategies for observations in the arctic atmospheric boundary layer project (ISOBAR) unique finescale observations under stable and very stable conditions: Unique fine-scale observations under 3 stable and very stable conditions', Bulletin of the American Meteorological Society, vol. 102, no. 2, pp. E218-E243. https://doi.org/10.1175/BAMS-D-19-0212.1
Kral, S. T., Reuder, J., Vihma, T., Suomi, I., Haualand, K. F., Urbancic, G., Greene, B. R., Steeneveld, G. J., Lorenz, T., Maronga, B., Jonassen, M. O., Ajosenpää, H., Båserud, L., Chilson, P. B., Holtslag, A. A. M., Jenkins, A. D., Kouznetsov, R., Mayer, S., Pillar-Little, E. A., ... Wrenger, B. (2021). The innovative strategies for observations in the arctic atmospheric boundary layer project (ISOBAR) unique finescale observations under stable and very stable conditions: Unique fine-scale observations under 3 stable and very stable conditions. Bulletin of the American Meteorological Society, 102(2), E218-E243. https://doi.org/10.1175/BAMS-D-19-0212.1
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abstract = "The Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer Program (ISOBAR) is a research project investigating stable atmospheric boundary layer (SBL) processes, whose representation still poses significant challenges in state-of-the-art numerical weather prediction (NWP) models. In ISOBAR ground-based flux and profile observations are combined with boundary layer remote sensing methods and the extensive usage of different unmanned aircraft systems (UAS). During February 2017 and 2018 we carried out two major field campaigns over the sea ice of the northern Baltic Sea, close to the Finnish island of Hailuoto at 65°N. In total 14 intensive observational periods (IOPs) resulted in extensive SBL datasets with unprecedented spatiotemporal resolution, which will form the basis for various numerical modeling experiments. First results from the campaigns indicate numerous very stable boundary layer (VSBL) cases, characterized by strong stratification, weak winds, and clear skies, and give detailed insight in the temporal evolution and vertical structure of the entire SBL. The SBL is subject to rapid changes in its vertical structure, responding to a variety of different processes. In particular, we study cases involving a shear instability associated with a low-level jet, a rapid strong cooling event observed a few meters above ground, and a strong wave-breaking event that triggers intensive near-surface turbulence. Furthermore, we use observations from one IOP to validate three different atmospheric models. The unique finescale observations resulting from the ISOBAR observational approach will aid future research activities, focusing on a better understanding of the SBL and its implementation in numerical models.",
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Download

TY - JOUR

T1 - The innovative strategies for observations in the arctic atmospheric boundary layer project (ISOBAR) unique finescale observations under stable and very stable conditions

T2 - Unique fine-scale observations under 3 stable and very stable conditions

AU - Kral, Stephan T.

AU - Reuder, Joachim

AU - Vihma, Timo

AU - Suomi, Irene

AU - Haualand, Kristine Flacké

AU - Urbancic, Gabin

AU - Greene, Brian R.

AU - Steeneveld, Gert Jan

AU - Lorenz, Torge

AU - Maronga, Björn

AU - Jonassen, Marius O.

AU - Ajosenpää, Hada

AU - Båserud, Line

AU - Chilson, Phillip B.

AU - Holtslag, Albert A.M.

AU - Jenkins, Alastair D.

AU - Kouznetsov, Rostislav

AU - Mayer, Stephanie

AU - Pillar-Little, Elizabeth A.

AU - Rautenberg, Alexander

AU - Schwenkel, Johannes

AU - Seidl, Andrew W.

AU - Wrenger, Burkhard

PY - 2021/2

Y1 - 2021/2

N2 - The Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer Program (ISOBAR) is a research project investigating stable atmospheric boundary layer (SBL) processes, whose representation still poses significant challenges in state-of-the-art numerical weather prediction (NWP) models. In ISOBAR ground-based flux and profile observations are combined with boundary layer remote sensing methods and the extensive usage of different unmanned aircraft systems (UAS). During February 2017 and 2018 we carried out two major field campaigns over the sea ice of the northern Baltic Sea, close to the Finnish island of Hailuoto at 65°N. In total 14 intensive observational periods (IOPs) resulted in extensive SBL datasets with unprecedented spatiotemporal resolution, which will form the basis for various numerical modeling experiments. First results from the campaigns indicate numerous very stable boundary layer (VSBL) cases, characterized by strong stratification, weak winds, and clear skies, and give detailed insight in the temporal evolution and vertical structure of the entire SBL. The SBL is subject to rapid changes in its vertical structure, responding to a variety of different processes. In particular, we study cases involving a shear instability associated with a low-level jet, a rapid strong cooling event observed a few meters above ground, and a strong wave-breaking event that triggers intensive near-surface turbulence. Furthermore, we use observations from one IOP to validate three different atmospheric models. The unique finescale observations resulting from the ISOBAR observational approach will aid future research activities, focusing on a better understanding of the SBL and its implementation in numerical models.

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KW - Arctic

KW - Atmosphere

KW - Boundary layer

KW - Field experiments

KW - Numerical analysis/modeling

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VL - 102

SP - E218-E243

JO - Bulletin of the American Meteorological Society

JF - Bulletin of the American Meteorological Society

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