Derivation of turbulent energy dissipation rate with the Middle Atmosphere Alomar Radar System (MAARSY) and radiosondes at Andøya, Norway

We present the derivation of turbulent energy dissipation rate ε from a total of 522 days of observations with the Middle Atmosphere Alomar Radar SYstem (MAARSY) mesosphere–stratosphere–troposphere (MST) radar running tropospheric experiments during the period of 2010–2013 as well as with balloon-bo...

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Main Authors: Li, Qiang, Rapp, Markus, Schrön, Anne, Schneider, Andreas, Stober, Gunter
Format: Article in Journal/Newspaper
Language:English
Published: München : European Geopyhsical Union 2016
Subjects:
530
Online Access:https://doi.org/10.34657/1447
https://oa.tib.eu/renate/handle/123456789/4026
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spelling ftleibnizopen:oai:oai.leibnizopen.de:G3bfXIkBdbrxVwz6igbf 2023-07-30T03:56:10+02:00 Derivation of turbulent energy dissipation rate with the Middle Atmosphere Alomar Radar System (MAARSY) and radiosondes at Andøya, Norway Li, Qiang Rapp, Markus Schrön, Anne Schneider, Andreas Stober, Gunter 2016 application/pdf https://doi.org/10.34657/1447 https://oa.tib.eu/renate/handle/123456789/4026 eng eng München : European Geopyhsical Union CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Annales Geophysicae, Volume 34, Issue 12, Page 1209-1229 Meteorology and atmospheric dynamics (middle atmosphere dynamics turbulence waves and tides) 530 article Text 2016 ftleibnizopen https://doi.org/10.34657/1447 2023-07-16T23:27:29Z We present the derivation of turbulent energy dissipation rate ε from a total of 522 days of observations with the Middle Atmosphere Alomar Radar SYstem (MAARSY) mesosphere–stratosphere–troposphere (MST) radar running tropospheric experiments during the period of 2010–2013 as well as with balloon-borne radiosondes based on a campaign in the summer 2013. Spectral widths are converted to ε after the removal of the broadening effects due to the finite beam width of the radar. With the simultaneous in situ measurements of ε with balloon-borne radiosondes at the MAARSY radar site, we compare the ε values derived from both techniques and reach an encouraging agreement between them. Using all the radar data available, we present a preliminary climatology of atmospheric turbulence in the UTLS (upper troposphere and lower stratosphere) region above the MAARSY site showing a variability of more than 5 orders of magnitude inherent in turbulent energy dissipation rates. The derived ε values reveal a log-normal distribution with a negative skewness, and the ε profiles show an increase with height which is also the case for each individual month. Atmospheric turbulence based on our radar measurements reveals a seasonal variation but no clear diurnal variation in the UTLS region. Comparison of ε with the gradient Richardson number Ri shows that only 1.7 % of all the data with turbulence occur under the condition of Ri < 1 and that the values of ε under the condition of Ri < 1 are significantly larger than those under Ri > 1. Further, there is a roughly negative correlation between ε and Ri that is independent of the scale dependence of Ri. Turbulence under active dynamical conditions (velocity of horizontal wind U > 10 m s−1) is significantly stronger than under quiet conditions (U < 10 m s−1). Last but not least, the derived ε values are compared with the corresponding vertical shears of background wind velocity showing a linear relation with a corresponding correlation coefficient r = 58 % well above the 99.9 ... Article in Journal/Newspaper Andøya LeibnizOpen (The Leibniz Association) Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Andøya ENVELOPE(13.982,13.982,68.185,68.185) Norway
institution Open Polar
collection LeibnizOpen (The Leibniz Association)
op_collection_id ftleibnizopen
language English
topic Meteorology and atmospheric dynamics (middle atmosphere dynamics
turbulence
waves and tides)
530
spellingShingle Meteorology and atmospheric dynamics (middle atmosphere dynamics
turbulence
waves and tides)
530
Li, Qiang
Rapp, Markus
Schrön, Anne
Schneider, Andreas
Stober, Gunter
Derivation of turbulent energy dissipation rate with the Middle Atmosphere Alomar Radar System (MAARSY) and radiosondes at Andøya, Norway
topic_facet Meteorology and atmospheric dynamics (middle atmosphere dynamics
turbulence
waves and tides)
530
description We present the derivation of turbulent energy dissipation rate ε from a total of 522 days of observations with the Middle Atmosphere Alomar Radar SYstem (MAARSY) mesosphere–stratosphere–troposphere (MST) radar running tropospheric experiments during the period of 2010–2013 as well as with balloon-borne radiosondes based on a campaign in the summer 2013. Spectral widths are converted to ε after the removal of the broadening effects due to the finite beam width of the radar. With the simultaneous in situ measurements of ε with balloon-borne radiosondes at the MAARSY radar site, we compare the ε values derived from both techniques and reach an encouraging agreement between them. Using all the radar data available, we present a preliminary climatology of atmospheric turbulence in the UTLS (upper troposphere and lower stratosphere) region above the MAARSY site showing a variability of more than 5 orders of magnitude inherent in turbulent energy dissipation rates. The derived ε values reveal a log-normal distribution with a negative skewness, and the ε profiles show an increase with height which is also the case for each individual month. Atmospheric turbulence based on our radar measurements reveals a seasonal variation but no clear diurnal variation in the UTLS region. Comparison of ε with the gradient Richardson number Ri shows that only 1.7 % of all the data with turbulence occur under the condition of Ri < 1 and that the values of ε under the condition of Ri < 1 are significantly larger than those under Ri > 1. Further, there is a roughly negative correlation between ε and Ri that is independent of the scale dependence of Ri. Turbulence under active dynamical conditions (velocity of horizontal wind U > 10 m s−1) is significantly stronger than under quiet conditions (U < 10 m s−1). Last but not least, the derived ε values are compared with the corresponding vertical shears of background wind velocity showing a linear relation with a corresponding correlation coefficient r = 58 % well above the 99.9 ...
format Article in Journal/Newspaper
author Li, Qiang
Rapp, Markus
Schrön, Anne
Schneider, Andreas
Stober, Gunter
author_facet Li, Qiang
Rapp, Markus
Schrön, Anne
Schneider, Andreas
Stober, Gunter
author_sort Li, Qiang
title Derivation of turbulent energy dissipation rate with the Middle Atmosphere Alomar Radar System (MAARSY) and radiosondes at Andøya, Norway
title_short Derivation of turbulent energy dissipation rate with the Middle Atmosphere Alomar Radar System (MAARSY) and radiosondes at Andøya, Norway
title_full Derivation of turbulent energy dissipation rate with the Middle Atmosphere Alomar Radar System (MAARSY) and radiosondes at Andøya, Norway
title_fullStr Derivation of turbulent energy dissipation rate with the Middle Atmosphere Alomar Radar System (MAARSY) and radiosondes at Andøya, Norway
title_full_unstemmed Derivation of turbulent energy dissipation rate with the Middle Atmosphere Alomar Radar System (MAARSY) and radiosondes at Andøya, Norway
title_sort derivation of turbulent energy dissipation rate with the middle atmosphere alomar radar system (maarsy) and radiosondes at andøya, norway
publisher München : European Geopyhsical Union
publishDate 2016
url https://doi.org/10.34657/1447
https://oa.tib.eu/renate/handle/123456789/4026
long_lat ENVELOPE(-67.083,-67.083,-68.133,-68.133)
ENVELOPE(13.982,13.982,68.185,68.185)
geographic Alomar
Andøya
Norway
geographic_facet Alomar
Andøya
Norway
genre Andøya
genre_facet Andøya
op_source Annales Geophysicae, Volume 34, Issue 12, Page 1209-1229
op_rights CC BY 3.0 Unported
https://creativecommons.org/licenses/by/3.0/
op_doi https://doi.org/10.34657/1447
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