Observed and Modeled Mountain Waves from the Surface to the Mesosphere near the Drake Passage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10454798" target="_blank" >RIV/00216208:11320/22:10454798 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Yk-lytG.Gm" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Yk-lytG.Gm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1175/JAS-D-21-0252.1" target="_blank" >10.1175/JAS-D-21-0252.1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Observed and Modeled Mountain Waves from the Surface to the Mesosphere near the Drake Passage

Popis výsledku v původním jazyce

Four state-of-the-science numerical weather prediction (NWP) models were used to perform mountain wave (MW)-resolving hindcasts over the Drake Passage of a 10-day period in 2010 with numerous observed MW cases. The Integrated Forecast System (IFS) and the Icosahedral Nonhydrostatic (ICON) model were run at Delta x approximate to 9 and 13 km globally. TheWeather Research and Forecasting (WRF) Model and the Met Office Unified Model (UM) were both configured with a Dx 5 3-km regional domain. All domains had tops near 1 Pa (z approximate to 80 km). These deep domains allowed quantitative validation against Atmospheric Infrared Sounder (AIRS) observations, accounting for observation time, viewing geometry, and radiative transfer. All models reproduced observed middle-atmosphere MWs with remarkable skill. Increased horizontal resolution improved validations. Still, all models underrepresented observed MW amplitudes, even after accounting for model effective resolution and instrument noise, suggesting even at Delta x approximate to 3-km resolution, small-scale MWs are underresolved and/ or overdiffused. MWdrag parameterizations are still necessary in NWP models at current operational resolutions of Delta x approximate to 10 km. Upper GW sponge layers in the operationally configured models significantly, artificially reduced MW amplitudes in the upper stratosphere and mesosphere. In the IFS, parameterized GW drags partly compensated this deficiency, but still, total drags were approximate to 6 times smaller than that resolved at Delta x approximate to 3 km. Meridionally propagating MWs significantly enhance zonal drag over the Drake Passage. Interestingly, drag associated with meridional fluxes of zonal momentum (i.e., (u&apos;v&apos;) over bar) were important; not accounting for these terms results in a drag in the wrong direction at and below the polar night jet.

Název v anglickém jazyce

Observed and Modeled Mountain Waves from the Surface to the Mesosphere near the Drake Passage

Popis výsledku anglicky

Four state-of-the-science numerical weather prediction (NWP) models were used to perform mountain wave (MW)-resolving hindcasts over the Drake Passage of a 10-day period in 2010 with numerous observed MW cases. The Integrated Forecast System (IFS) and the Icosahedral Nonhydrostatic (ICON) model were run at Delta x approximate to 9 and 13 km globally. TheWeather Research and Forecasting (WRF) Model and the Met Office Unified Model (UM) were both configured with a Dx 5 3-km regional domain. All domains had tops near 1 Pa (z approximate to 80 km). These deep domains allowed quantitative validation against Atmospheric Infrared Sounder (AIRS) observations, accounting for observation time, viewing geometry, and radiative transfer. All models reproduced observed middle-atmosphere MWs with remarkable skill. Increased horizontal resolution improved validations. Still, all models underrepresented observed MW amplitudes, even after accounting for model effective resolution and instrument noise, suggesting even at Delta x approximate to 3-km resolution, small-scale MWs are underresolved and/ or overdiffused. MWdrag parameterizations are still necessary in NWP models at current operational resolutions of Delta x approximate to 10 km. Upper GW sponge layers in the operationally configured models significantly, artificially reduced MW amplitudes in the upper stratosphere and mesosphere. In the IFS, parameterized GW drags partly compensated this deficiency, but still, total drags were approximate to 6 times smaller than that resolved at Delta x approximate to 3 km. Meridionally propagating MWs significantly enhance zonal drag over the Drake Passage. Interestingly, drag associated with meridional fluxes of zonal momentum (i.e., (u&apos;v&apos;) over bar) were important; not accounting for these terms results in a drag in the wrong direction at and below the polar night jet.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/EF19_074%2F0016231" target="_blank" >EF19_074/0016231: Mobilita pracovníků UK MSCA-IF III</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journals of the Atmospheric Sciences

ISSN

0022-4928

e-ISSN

1520-0469

Svazek periodika

79

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

24

Strana od-do

909-932

Kód UT WoS článku

000808410000001

EID výsledku v databázi Scopus

2-s2.0-85129946535