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Observations of Wintertime Low-Level Jets in the Coastal Region of the Laptev Sea in the Siberian Arctic Using SODAR/RASS

  • In 2014/2015 a one-year field campaign at the Tiksi observatory in the Laptev Sea area was carried out using Sound Detection and Ranging/Radio Acoustic Sounding System (SODAR/RASS) measurements to investigate the atmospheric boundary layer (ABL) with a focus on low-level jets (LLJ) during the winter season. In addition to SODAR/RASS-derived vertical profiles of temperature, wind speed and direction, a suite of complementary measurements at the Tiksi observatory was available. Data of a regional atmospheric model were used to put the local data into the synoptic context. Two case studies of LLJ events are presented. The statistics of LLJs for six months show that in about 23% of all profiles LLJs were present with a mean jet speed and height of about 7 m/s and 240 m, respectively. In 3.4% of all profiles LLJs exceeding 10 m/s occurred. The main driving mechanism for LLJs seems to be the baroclinicity, since no inertial oscillations were found. LLJs with heights below 200 m are likely influenced by local topography.

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Author:Günther Heinemann, Clemens Drüe, Pascal Schwarz, Alexander Makshtas
Parent Title (English):Remote Sensing
Place of publication:Basel
Document Type:Contribution to a Periodical
Date of completion:2021/04/07
Date of publication:2021/04/07
Publishing institution:Universität Trier
Contributing corporation:The publication was funded by the Open Access Fund of Universität Trier and the German Research Foundation (DFG)
Release Date:2022/02/23
Tag:Laptev Sea; SODAR/RASS; atmospheric boundary layer; low-level jets
GND Keyword:Atmosphärische Grenzschicht; Laptewsee; Sodar; Strahlstrom
Volume (for the year ...):2021
Issue / no.:Band 13, Heft 8
Number of pages:19
Institutes:Fachbereich 6
Dewey Decimal Classification:9 Geschichte und Geografie / 91 Geografie, Reisen / 910 Geografie, Reisen
Licence (German):License LogoCC BY: Creative-Commons-Lizenz 4.0 International

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