Simulating influences of QBO phases and orographic gravity wave forcing on planetary waves in the middle atmosphere

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Simulating influences of QBO phases and orographic gravity wave forcing on planetary waves in the middle atmosphere. / Gavrilov, Nikolai M.; Koval, Andrej V.; Pogoreltsev, Alexander I.; Savenkova, Elena N.

In: EARTH PLANETS AND SPACE, Vol. 67, No. 86, 86, 2015.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{08be3a3a1030467e9bcf7ba587c5a7fc,

title = "Simulating influences of QBO phases and orographic gravity wave forcing on planetary waves in the middle atmosphere",

abstract = "Recently developed parameterization of stationary orographic gravity waves (OGWs) generated by the Earth's topography was implemented into a general circulation model of the middle and upper atmosphere. We performed numerical simulations of the zonal mean wind and amplitudes of stationary planetary waves and normal atmospheric modes with periods of 4-16 days at altitudes from the troposphere to the lower thermosphere in January for easterly and westerly phases of the quasi-biennial oscillation (QBO) including and excluding the stationary OGW parameterization. Simulations show that accounting dynamical and thermal effects of stationary OGWs can lead to substantial changes (up to 50-90 %) in the amplitudes of stationary planetary waves. Amplitudes of westward travelling normal atmospheric modes change (up to 50-90 %) at different altitudes and latitudes of the northern hemisphere due to OGW effects. Transitions from the easterly to westerly QBO phases can change planetary wave amplitudes up to ±30-90 % at middle and high latitudes. These changes in PW amplitudes are consistent with distributions of EP-flux and refractive index under different QBO phases simulated including our parameterization of stationary OGWs.",

keywords = "middle and upper atmosphere, circulation modeling, planetary waves, orographic gravity waves, wave heating, parameterization, quasi-biennial oscillation",

author = "Gavrilov, {Nikolai M.} and Koval, {Andrej V.} and Pogoreltsev, {Alexander I.} and Savenkova, {Elena N.}",

year = "2015",

doi = "10.1186/s40623-015-0259-2",

language = "English",

volume = "67",

journal = "Earth, Planets and Space",

issn = "1343-8832",

publisher = "Terra Scientific Publishing Company",

number = "86",

}

RIS

TY - JOUR

T1 - Simulating influences of QBO phases and orographic gravity wave forcing on planetary waves in the middle atmosphere

AU - Gavrilov, Nikolai M.

AU - Koval, Andrej V.

AU - Pogoreltsev, Alexander I.

AU - Savenkova, Elena N.

PY - 2015

Y1 - 2015

N2 - Recently developed parameterization of stationary orographic gravity waves (OGWs) generated by the Earth's topography was implemented into a general circulation model of the middle and upper atmosphere. We performed numerical simulations of the zonal mean wind and amplitudes of stationary planetary waves and normal atmospheric modes with periods of 4-16 days at altitudes from the troposphere to the lower thermosphere in January for easterly and westerly phases of the quasi-biennial oscillation (QBO) including and excluding the stationary OGW parameterization. Simulations show that accounting dynamical and thermal effects of stationary OGWs can lead to substantial changes (up to 50-90 %) in the amplitudes of stationary planetary waves. Amplitudes of westward travelling normal atmospheric modes change (up to 50-90 %) at different altitudes and latitudes of the northern hemisphere due to OGW effects. Transitions from the easterly to westerly QBO phases can change planetary wave amplitudes up to ±30-90 % at middle and high latitudes. These changes in PW amplitudes are consistent with distributions of EP-flux and refractive index under different QBO phases simulated including our parameterization of stationary OGWs.

AB - Recently developed parameterization of stationary orographic gravity waves (OGWs) generated by the Earth's topography was implemented into a general circulation model of the middle and upper atmosphere. We performed numerical simulations of the zonal mean wind and amplitudes of stationary planetary waves and normal atmospheric modes with periods of 4-16 days at altitudes from the troposphere to the lower thermosphere in January for easterly and westerly phases of the quasi-biennial oscillation (QBO) including and excluding the stationary OGW parameterization. Simulations show that accounting dynamical and thermal effects of stationary OGWs can lead to substantial changes (up to 50-90 %) in the amplitudes of stationary planetary waves. Amplitudes of westward travelling normal atmospheric modes change (up to 50-90 %) at different altitudes and latitudes of the northern hemisphere due to OGW effects. Transitions from the easterly to westerly QBO phases can change planetary wave amplitudes up to ±30-90 % at middle and high latitudes. These changes in PW amplitudes are consistent with distributions of EP-flux and refractive index under different QBO phases simulated including our parameterization of stationary OGWs.

KW - middle and upper atmosphere

KW - circulation modeling

KW - planetary waves

KW - orographic gravity waves

KW - wave heating

KW - parameterization

KW - quasi-biennial oscillation

UR - https://earth-planets-space.springeropen.com/articles/10.1186/s40623-015-0259-2

U2 - 10.1186/s40623-015-0259-2

DO - 10.1186/s40623-015-0259-2

M3 - Article

VL - 67

JO - Earth, Planets and Space

JF - Earth, Planets and Space

SN - 1343-8832

IS - 86

M1 - 86

ER -

ID: 3923709