Long-Term Characteristics of the Meteor Radar Winds Observed at King Sejong Station, Antarctica

B. G. Song; H. Y. Chun; I. S. Song; C. Lee; J. H. Kim; G. Jee

doi:10.1029/2022JD037190

Long-Term Characteristics of the Meteor Radar Winds Observed at King Sejong Station, Antarctica

B. G. Song, H. Y. Chun, I. S. Song, C. Lee, J. H. Kim, G. Jee

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

Abstract

The characteristics of the horizontal wind in the mesosphere and lower thermosphere (MLT) at King Sejong Station (KSS) in the Antarctic Peninsula are investigated using approximately 15-year (March 2007–November 2021) meteor radar (MR) observations. The 15-year climatology and variability of the MLT winds at KSS are analyzed for the first time, and comparisons with the observations at other Antarctic stations are performed. The short-period oscillations (periods between 2 hr and 10 days) of the winds, including tides and several planetary wave components, are examined for each month. Temporal and altitudinal variations in the amplitudes of the semidiurnal and diurnal tides, the two largest short-period components, are analyzed. Annual and semiannual oscillations of the wind are distinct below and above z = 90 km, respectively. The long-term trend of the zonal wind is estimated through a multiple linear regression analysis. Statistically significant trends of the zonal wind of ∼0.5–0.8 m s⁻¹ yr⁻¹ appear above z = 90 km in July. To understand observed MLT wind trends, the gravity-wave momentum flux and gravity-wave drag (GWD) in the MLT region are estimated from the MR observations at KSS for the 15 years. Similar seasonal variations are found between the trends of the zonal winds and zonal GWDs, especially above z = 94 km. In July where a strong positive zonal wind trend appears, positive correlation between the zonal wind and zonal GWDs is found to be statistically significant above z = 94 km.

Original language	English
Article number	e2022JD037190
Journal	Journal of Geophysical Research: Atmospheres
Volume	128
Issue number	1
DOIs	https://doi.org/10.1029/2022JD037190
Publication status	Published - 2023 Jan 16

Bibliographical note

Funding Information:
This work was supported by the Korea Polar Research Institute (KOPRI, PE21020/PE22020). HYC was also supported from the National Research Foundation of Korea (NRF) grant funded by the South Korea government (MSIT) (2021R1A2C100710212). The authors would like to thank the overwintering members at KSS for the undisrupted operation of meteor radar. The authors would like to thank two anonymous reviewers and the editor for their valuable comments and suggestions.

Funding Information:
This work was supported by the Korea Polar Research Institute (KOPRI, PE21020/PE22020). HYC was also supported from the National Research Foundation of Korea (NRF) grant funded by the South Korea government (MSIT) (2021R1A2C100710212). The authors would like to thank the overwintering members at KSS for the undisrupted operation of meteor radar. The authors would like to thank two anonymous reviewers and the editor for their valuable comments and suggestions.

Publisher Copyright:
© 2022. The Authors.

All Science Journal Classification (ASJC) codes

Geophysics
Atmospheric Science
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science

Access to Document

10.1029/2022JD037190

Cite this

@article{31ade301ac1c4380814694a2966869e3,

title = "Long-Term Characteristics of the Meteor Radar Winds Observed at King Sejong Station, Antarctica",

abstract = "The characteristics of the horizontal wind in the mesosphere and lower thermosphere (MLT) at King Sejong Station (KSS) in the Antarctic Peninsula are investigated using approximately 15-year (March 2007–November 2021) meteor radar (MR) observations. The 15-year climatology and variability of the MLT winds at KSS are analyzed for the first time, and comparisons with the observations at other Antarctic stations are performed. The short-period oscillations (periods between 2 hr and 10 days) of the winds, including tides and several planetary wave components, are examined for each month. Temporal and altitudinal variations in the amplitudes of the semidiurnal and diurnal tides, the two largest short-period components, are analyzed. Annual and semiannual oscillations of the wind are distinct below and above z = 90 km, respectively. The long-term trend of the zonal wind is estimated through a multiple linear regression analysis. Statistically significant trends of the zonal wind of ∼0.5–0.8 m s−1 yr−1 appear above z = 90 km in July. To understand observed MLT wind trends, the gravity-wave momentum flux and gravity-wave drag (GWD) in the MLT region are estimated from the MR observations at KSS for the 15 years. Similar seasonal variations are found between the trends of the zonal winds and zonal GWDs, especially above z = 94 km. In July where a strong positive zonal wind trend appears, positive correlation between the zonal wind and zonal GWDs is found to be statistically significant above z = 94 km.",

author = "Song, {B. G.} and Chun, {H. Y.} and Song, {I. S.} and C. Lee and Kim, {J. H.} and G. Jee",

note = "Funding Information: This work was supported by the Korea Polar Research Institute (KOPRI, PE21020/PE22020). HYC was also supported from the National Research Foundation of Korea (NRF) grant funded by the South Korea government (MSIT) (2021R1A2C100710212). The authors would like to thank the overwintering members at KSS for the undisrupted operation of meteor radar. The authors would like to thank two anonymous reviewers and the editor for their valuable comments and suggestions. Funding Information: This work was supported by the Korea Polar Research Institute (KOPRI, PE21020/PE22020). HYC was also supported from the National Research Foundation of Korea (NRF) grant funded by the South Korea government (MSIT) (2021R1A2C100710212). The authors would like to thank the overwintering members at KSS for the undisrupted operation of meteor radar. The authors would like to thank two anonymous reviewers and the editor for their valuable comments and suggestions. Publisher Copyright: {\textcopyright} 2022. The Authors.",

year = "2023",

month = jan,

day = "16",

doi = "10.1029/2022JD037190",

language = "English",

volume = "128",

journal = "Journal of Geophysical Research: Atmospheres",

issn = "2169-897X",

number = "1",

}

TY - JOUR

T1 - Long-Term Characteristics of the Meteor Radar Winds Observed at King Sejong Station, Antarctica

AU - Song, B. G.

AU - Chun, H. Y.

AU - Song, I. S.

AU - Lee, C.

AU - Kim, J. H.

AU - Jee, G.

N1 - Funding Information: This work was supported by the Korea Polar Research Institute (KOPRI, PE21020/PE22020). HYC was also supported from the National Research Foundation of Korea (NRF) grant funded by the South Korea government (MSIT) (2021R1A2C100710212). The authors would like to thank the overwintering members at KSS for the undisrupted operation of meteor radar. The authors would like to thank two anonymous reviewers and the editor for their valuable comments and suggestions. Funding Information: This work was supported by the Korea Polar Research Institute (KOPRI, PE21020/PE22020). HYC was also supported from the National Research Foundation of Korea (NRF) grant funded by the South Korea government (MSIT) (2021R1A2C100710212). The authors would like to thank the overwintering members at KSS for the undisrupted operation of meteor radar. The authors would like to thank two anonymous reviewers and the editor for their valuable comments and suggestions. Publisher Copyright: © 2022. The Authors.

PY - 2023/1/16

Y1 - 2023/1/16

N2 - The characteristics of the horizontal wind in the mesosphere and lower thermosphere (MLT) at King Sejong Station (KSS) in the Antarctic Peninsula are investigated using approximately 15-year (March 2007–November 2021) meteor radar (MR) observations. The 15-year climatology and variability of the MLT winds at KSS are analyzed for the first time, and comparisons with the observations at other Antarctic stations are performed. The short-period oscillations (periods between 2 hr and 10 days) of the winds, including tides and several planetary wave components, are examined for each month. Temporal and altitudinal variations in the amplitudes of the semidiurnal and diurnal tides, the two largest short-period components, are analyzed. Annual and semiannual oscillations of the wind are distinct below and above z = 90 km, respectively. The long-term trend of the zonal wind is estimated through a multiple linear regression analysis. Statistically significant trends of the zonal wind of ∼0.5–0.8 m s−1 yr−1 appear above z = 90 km in July. To understand observed MLT wind trends, the gravity-wave momentum flux and gravity-wave drag (GWD) in the MLT region are estimated from the MR observations at KSS for the 15 years. Similar seasonal variations are found between the trends of the zonal winds and zonal GWDs, especially above z = 94 km. In July where a strong positive zonal wind trend appears, positive correlation between the zonal wind and zonal GWDs is found to be statistically significant above z = 94 km.

AB - The characteristics of the horizontal wind in the mesosphere and lower thermosphere (MLT) at King Sejong Station (KSS) in the Antarctic Peninsula are investigated using approximately 15-year (March 2007–November 2021) meteor radar (MR) observations. The 15-year climatology and variability of the MLT winds at KSS are analyzed for the first time, and comparisons with the observations at other Antarctic stations are performed. The short-period oscillations (periods between 2 hr and 10 days) of the winds, including tides and several planetary wave components, are examined for each month. Temporal and altitudinal variations in the amplitudes of the semidiurnal and diurnal tides, the two largest short-period components, are analyzed. Annual and semiannual oscillations of the wind are distinct below and above z = 90 km, respectively. The long-term trend of the zonal wind is estimated through a multiple linear regression analysis. Statistically significant trends of the zonal wind of ∼0.5–0.8 m s−1 yr−1 appear above z = 90 km in July. To understand observed MLT wind trends, the gravity-wave momentum flux and gravity-wave drag (GWD) in the MLT region are estimated from the MR observations at KSS for the 15 years. Similar seasonal variations are found between the trends of the zonal winds and zonal GWDs, especially above z = 94 km. In July where a strong positive zonal wind trend appears, positive correlation between the zonal wind and zonal GWDs is found to be statistically significant above z = 94 km.

UR - http://www.scopus.com/inward/record.url?scp=85146057583&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85146057583&partnerID=8YFLogxK

U2 - 10.1029/2022JD037190

DO - 10.1029/2022JD037190

M3 - Article

AN - SCOPUS:85146057583

SN - 2169-897X

VL - 128

JO - Journal of Geophysical Research: Atmospheres

JF - Journal of Geophysical Research: Atmospheres

IS - 1

M1 - e2022JD037190

ER -

Long-Term Characteristics of the Meteor Radar Winds Observed at King Sejong Station, Antarctica

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this