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Title: A Case Study of Observed and Modeled Barrier Flow in the Denmark Strait in May 2015

Abstract

Abstract Mesoscale barrier jets in the Denmark Strait are common in winter months and have the capability to influence open ocean convection. This paper presents the first detailed observational study of a summertime (21 May 2015) barrier wind event in the Denmark Strait using dropsondes and observations from an airborne Doppler wind lidar (DWL). The DWL profiles agree well with dropsonde observations and show a vertically narrow (~250–400 m) barrier jet of 23–28 m s−1 near the Greenland coast that broadens (~300–1000 m) and strengthens farther off coast. In addition, otherwise identical regional high-resolution Weather Research and Forecasting (WRF) Model simulations of the event are analyzed at four horizontal grid spacings (5, 10, 25, and 50 km), two vertical resolutions (40 and 60 levels), and two planetary boundary layer (PBL) parameterizations [Mellor–Yamada–Nakanishi–Niino, version 2.5 (MYNN2.5) and University of Washington (UW)] to determine what model configurations best simulate the observed jet structure. Comparison of the WRF simulations with wind observations from satellites, dropsondes, and the airborne DWL scans indicate that the combination of both high horizontal resolution (5 km) and vertical resolution (60 levels) best captures observed barrier jet structure and speeds as well as the observed cloud field, including somemore » convective clouds. Both WRF PBL schemes produced reasonable barrier jets with the UW scheme slightly outperforming the MYNN2.5 scheme. However, further investigation at high horizontal and vertical resolution is needed to determine the impact of the WRF PBL scheme on surface energy budget terms, particularly in the high-latitude maritime environment around Greenland.« less

Authors:
 [1];  [2];  [3];  [3]
  1. Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado
  2. Cooperative Institute for Research in Environmental Sciences, and Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, Colorado
  3. Simpson Weather Associates, Charlottesville, Virginia
Publication Date:
Research Org.:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1358298
Alternate Identifier(s):
OSTI ID: 1537035
Grant/Contract Number:  
SC0006178; SC0014853
Resource Type:
Published Article
Journal Name:
Monthly Weather Review
Additional Journal Information:
Journal Name: Monthly Weather Review Journal Volume: 145 Journal Issue: 6; Journal ID: ISSN 0027-0644
Publisher:
American Meteorological Society
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Arctic; Jets; Wind; Lidars/Lidar observations; Model evaluation/performance; Regional models

Citation Formats

DuVivier, Alice K., Cassano, John J., Greco, Steven, and Emmitt, G. David. A Case Study of Observed and Modeled Barrier Flow in the Denmark Strait in May 2015. United States: N. p., 2017. Web. doi:10.1175/MWR-D-16-0386.1.
DuVivier, Alice K., Cassano, John J., Greco, Steven, & Emmitt, G. David. A Case Study of Observed and Modeled Barrier Flow in the Denmark Strait in May 2015. United States. doi:10.1175/MWR-D-16-0386.1.
DuVivier, Alice K., Cassano, John J., Greco, Steven, and Emmitt, G. David. Wed . "A Case Study of Observed and Modeled Barrier Flow in the Denmark Strait in May 2015". United States. doi:10.1175/MWR-D-16-0386.1.
@article{osti_1358298,
title = {A Case Study of Observed and Modeled Barrier Flow in the Denmark Strait in May 2015},
author = {DuVivier, Alice K. and Cassano, John J. and Greco, Steven and Emmitt, G. David},
abstractNote = {Abstract Mesoscale barrier jets in the Denmark Strait are common in winter months and have the capability to influence open ocean convection. This paper presents the first detailed observational study of a summertime (21 May 2015) barrier wind event in the Denmark Strait using dropsondes and observations from an airborne Doppler wind lidar (DWL). The DWL profiles agree well with dropsonde observations and show a vertically narrow (~250–400 m) barrier jet of 23–28 m s−1 near the Greenland coast that broadens (~300–1000 m) and strengthens farther off coast. In addition, otherwise identical regional high-resolution Weather Research and Forecasting (WRF) Model simulations of the event are analyzed at four horizontal grid spacings (5, 10, 25, and 50 km), two vertical resolutions (40 and 60 levels), and two planetary boundary layer (PBL) parameterizations [Mellor–Yamada–Nakanishi–Niino, version 2.5 (MYNN2.5) and University of Washington (UW)] to determine what model configurations best simulate the observed jet structure. Comparison of the WRF simulations with wind observations from satellites, dropsondes, and the airborne DWL scans indicate that the combination of both high horizontal resolution (5 km) and vertical resolution (60 levels) best captures observed barrier jet structure and speeds as well as the observed cloud field, including some convective clouds. Both WRF PBL schemes produced reasonable barrier jets with the UW scheme slightly outperforming the MYNN2.5 scheme. However, further investigation at high horizontal and vertical resolution is needed to determine the impact of the WRF PBL scheme on surface energy budget terms, particularly in the high-latitude maritime environment around Greenland.},
doi = {10.1175/MWR-D-16-0386.1},
journal = {Monthly Weather Review},
number = 6,
volume = 145,
place = {United States},
year = {2017},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1175/MWR-D-16-0386.1

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Cited by: 1 work
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