Details
| Original language | English |
|---|---|
| Pages (from-to) | E218-E243 |
| Journal | Bulletin of the American Meteorological Society |
| Volume | 102 |
| Issue number | 2 |
| Publication status | Published - 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
- Earth and Planetary Sciences(all)
- Atmospheric Science
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In: Bulletin of the American Meteorological Society, Vol. 102, No. 2, 02.2021, p. E218-E243.
Research output: Contribution to journal › Article › Research
}
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.
AB - 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.
KW - Arctic
KW - Atmosphere
KW - Boundary layer
KW - Field experiments
KW - Numerical analysis/modeling
UR - http://www.scopus.com/inward/record.url?scp=85099020334&partnerID=8YFLogxK
U2 - 10.1175/BAMS-D-19-0212.1
DO - 10.1175/BAMS-D-19-0212.1
M3 - Article
VL - 102
SP - E218-E243
JO - Bulletin of the American Meteorological Society
JF - Bulletin of the American Meteorological Society
SN - 0003-0007
IS - 2
ER -