Climatology, long-term variability and trend of resolved gravity wave drag in the stratosphere revealed by ERA5

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10507350" target="_blank" >RIV/00216208:11320/25:10507350 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=2wV9dHhka0" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=2wV9dHhka0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/wcd-6-927-2025" target="_blank" >10.5194/wcd-6-927-2025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Climatology, long-term variability and trend of resolved gravity wave drag in the stratosphere revealed by ERA5

Popis výsledku v původním jazyce

Internal gravity waves have well-known importance for atmospheric dynamics, transport and coupling between atmospheric layers, and their parameterized forcing affects the circulation in climate models, especially in the stratosphere. The statistical features, spatial distribution, and short- and long-term variability of the parameterized gravity wave drag were studied extensively. Yet, little is known about the gravity wave drag in the real atmosphere. Challenges arise when attempting to constrain gravity wave drag using observational data, leading to the widespread use of wave activity proxies. Moreover, our limited observational capabilities hinder comprehensive assessments of global, long-term changes in stratospheric dynamical quantities.This study presents a quasi-observational analysis of resolved gravity wave drag climatology, variability and trends in the stratosphere. We employ a state-of-the-art methodology for gravity wave drag estimation, applying it to ERA5, the latest-generation atmospheric reanalysis that resolves a substantial portion of the gravity wave spectrum (wavelengths from a few hundred to a few thousand kilometers). The results are provided in the traditional zonal mean perspective, and, for the first time in the literature, we also focus on regional drag estimates over major orographic hotspots, fully taking into account the drag from lateral gravity wave propagation. Overall, our study represents a first step towards validating the climatology and variability of parameterized gravity wave drag in climate models.

Název v anglickém jazyce

Climatology, long-term variability and trend of resolved gravity wave drag in the stratosphere revealed by ERA5

Popis výsledku anglicky

Internal gravity waves have well-known importance for atmospheric dynamics, transport and coupling between atmospheric layers, and their parameterized forcing affects the circulation in climate models, especially in the stratosphere. The statistical features, spatial distribution, and short- and long-term variability of the parameterized gravity wave drag were studied extensively. Yet, little is known about the gravity wave drag in the real atmosphere. Challenges arise when attempting to constrain gravity wave drag using observational data, leading to the widespread use of wave activity proxies. Moreover, our limited observational capabilities hinder comprehensive assessments of global, long-term changes in stratospheric dynamical quantities.This study presents a quasi-observational analysis of resolved gravity wave drag climatology, variability and trends in the stratosphere. We employ a state-of-the-art methodology for gravity wave drag estimation, applying it to ERA5, the latest-generation atmospheric reanalysis that resolves a substantial portion of the gravity wave spectrum (wavelengths from a few hundred to a few thousand kilometers). The results are provided in the traditional zonal mean perspective, and, for the first time in the literature, we also focus on regional drag estimates over major orographic hotspots, fully taking into account the drag from lateral gravity wave propagation. Overall, our study represents a first step towards validating the climatology and variability of parameterized gravity wave drag in climate models.

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/GM23-04921M" target="_blank" >GM23-04921M: Objasnění vlivu atmosférických gravitačních vln na klima.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Weather and Climate Dynamics

ISSN

2698-4016

e-ISSN

2698-4016

Svazek periodika

6

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

21

Strana od-do

927-947

Kód UT WoS článku

001566499600001

EID výsledku v databázi Scopus

2-s2.0-105022660600