Characteristics of the quasi-16-day wave in the mesosphere and lower thermosphere region as revealed by meteor radar, Aura satellite, and MERRA2 reanalysis data from 2008 to 2017

Gong, Yun; Ma, Zenghong; Li, Chun; Lv, Xiedong; Zhang, Shaodong; Zhou, Qihou; Huang, Chunming; Huang, Kai; Yu, You; Li, Guozhu

doi:10.26464/epp2020033

Cited by 9 publications

(10 citation statements)

References 46 publications

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“…The 10 days (8-12 days) and 16 days (12-20 days) waves in the high latitudes obtained from the DMR, SMR, and TMR, in higher middle latitudes obtained from the MMR are mainly enhanced during winter and are weak during summer. The statistics of planetary waves (2-16 days) using the meteor radars in this study are generally consistent with the results described by Murphy et al (2007) using Davis MF radar wind and hydroxyl rotational temperature measurements, and those of Gong et al (2018Gong et al ( , 2020 and Wang et al (2020) using the MMR and BMR meteor radar wind measurements. Generally, the amplitudes of planetary waves are strongest in the SMR temperatures; and the amplitudes of planetary waves in northern high latitudes are greater than that of in southern latitudes.…”

Section: Seasonal Variations Of Mesopause Temperature and Hemisphericsupporting

confidence: 87%

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Climatology of Interhemispheric Mesopause Temperatures Using the High‐Latitude and Middle‐Latitude Meteor Radars

Xue

Murphy

et al. 2021

JGR Atmospheres

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The polar mesopause in summer is the coldest region of the Earth because gravity wave-driven mean meridional circulation results in upwelling and adiabatic cooling in the summer polar mesopause region (see e.g., Fritts et al., 2003). Accurate observations of mesopause temperature are essential for studying the short-term dynamics and long-term climate of the middle and upper atmosphere. However, the specific environment of the mesosphere makes obtaining continuous measurements of mesopause temperature quite difficult. Ground-based radio radars, such as MF (medium frequency) and VHF (very high frequency) radars, are widely used to measure the neutral horizontal wind in the mesosphere, but they are not capable of measuring temperature. Ground-based optical instruments, such as lidars and airglow spectrometers, can provide high temporal resolution and accurate temperature measurements but are limited to clear sky and often to nighttime conditions. Sounding rockets can provide a good in situ soundings of neutral mesospheric temperatures, but the high cost and complicated logistics of launching rockets generally make them impractical for routine observations. Meteor radars have been widely employed for investigating the mesosphere and lower thermosphere (MLT) region for decades, especially for the neutral wind of the MLT region. Because of the advantages Abstract We present the climatology of mesopause temperatures using high-latitude and middlelatitude meteor radars. The daily mesopause temperatures are estimated using ambipolar diffusion coefficient data from the meteor radars at Davis Station (68.6°S, 77.9°E), in Antarctica, Svalbard (78.3°N, 16°E), Tromsø (69.6°N, 19.2°E) in the Arctic, and Mohe (53.5°N, 122.3°E) and Beijing (40.3°N, 116.2°E) in the northern middle latitudes. The seasonal variations in the meteor radar-derived temperatures are in good agreement with the temperatures from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument onboard the TIMED satellite. Interhemispheric observations indicate that the mesopause temperatures over the southern and northern polar regions show a clear seasonal asymmetry. The seasonal variations in the Davis Station meteor radar temperatures in the southern polar mesopause are dominated by an annual oscillation (AO) with a relatively weak semiannual oscillation (SAO), which show a clear minimum during summer and a maximum during winter. The mesopause temperatures in the northern high and middle latitudes observed by the Svalbard, Tromsø, Mohe, and Beijing meteor radars mainly show an AO, with a maximum during winter and a minimum during summer. The AO in the northern polar regions is stronger than that in the southern polar regions, while the SAO in the southern polar regions is relatively strong compared to that in the northern polar regions. YI ET AL.

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Section: Seasonal Variations Of Mesopause Temperature and Hemisphericsupporting

confidence: 87%

“…(2007) using Davis MF radar wind and hydroxyl rotational temperature measurements, and those of Gong et al. (2018, 2020) and Wang et al. (2020) using the MMR and BMR meteor radar wind measurements.…”

Section: Seasonal Variations Of Mesopause Temperature and Hemisphericmentioning

confidence: 98%

Climatology of Interhemispheric Mesopause Temperatures Using the High‐Latitude and Middle‐Latitude Meteor Radars

Xue

Murphy

et al. 2021

JGR Atmospheres

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“…The zonal wind products used in this study have a 2 km altitudinal resolution from 80 to 98 km and a 1‐hour temporal resolution. Please refer to previous studies for detailed information on the BJ meteor radar and the wind retrieval method (e.g., Gong et al., 2020; Z. Ma et al., 2018; Yu et al., 2013). In the autumn of 2018, an enhancement of Q27DW in zonal winds over BJ is observed.…”

Section: Radar Data and Observationsmentioning

confidence: 99%

Study of a Quasi‐27‐Day Wave in the MLT Region During Recurrent Geomagnetic Storms in Autumn 2018

Gong

Zhang

et al. 2021

JGR Space Physics

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“…Cold hazard is one of the major meteorological disasters in China, exerting serious impacts on transportation, agriculture, industry, electricity, forestry, shery, animal husbandry, and economic construction as well as people's daily life (Xiao 2009; Zheng et al 2018). Under the background of global warming, the frequency of cold extremes and cold hazards do not decrease, and the spatial nonuniformity of occurrence is increasing (Gong and Ho 2004;Ou et al 2015; Ding et al 2020). Understanding the meteorological conditions of cold hazards and improving their forecast skills can provide a more accurate scienti c reference for cold hazard mitigation planning, which is of great social and economic signi cance.…”

Section: Introductionmentioning

confidence: 99%

Region-dependent meteorological conditions for the winter cold hazards with and without precipitation in China

Yang²,

Zhang³

et al. 2022

Nat Hazards

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Cold hazard is one of the major meteorological disasters in winter. However, the meteorological conditions for the cold hazard events vary signi cantly with both the feature of the event and the region of occurrence. This study divided winter cold hazard events in China into three categories based on the daily gridded dataset of cold hazards from November 1980 to March 2020: events without wintry precipitation (hazardous low temperature, abrupt temperature drop, and/or freezing), with wintry precipitation only (hazardous sleet and/or snowstorm), and with both. The region-dependent multivariate meteorological conditions for each category of cold hazards are investigated using ERA5 reanalysis data. Results show that the surface air temperature (T 2m ) and its anomaly (T 2m _ anom ) are lower than climatology during cold hazards. But the difference in T 2m among provinces exceeds 30°C, and even for the same province, the difference among different categories of cold hazards exceeds 10°C. The region-and category-dependent differences of T 2m _ anom and daily temperature drop (∆T 24 ) are also large, about 5°C and 2°C d -1 , respectively. The Multivariate Empirical Orthogonal Function analysis has further been applied to not only the abovementioned temperature-related variables but also the precipitation-related variables (i.e., daily accumulated total precipitation, daily accumulated snowfall, and daily mean snow depth) in the middle and lower Yangtze River region, which reveals the event-mean state and spatial-temporal coupling evolution during the progression of the event for the selected key meteorological variables. The meteorological conditions for cold hazards put forward by this study could provide region-dependent and category-dependent reference for the prediction and warning of cold hazards.

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Characteristics of the quasi-16-day wave in the mesosphere and lower thermosphere region as revealed by meteor radar, Aura satellite, and MERRA2 reanalysis data from 2008 to 2017

Cited by 9 publications

References 46 publications

Climatology of Interhemispheric Mesopause Temperatures Using the High‐Latitude and Middle‐Latitude Meteor Radars

Climatology of Interhemispheric Mesopause Temperatures Using the High‐Latitude and Middle‐Latitude Meteor Radars

Study of a Quasi‐27‐Day Wave in the MLT Region During Recurrent Geomagnetic Storms in Autumn 2018

Region-dependent meteorological conditions for the winter cold hazards with and without precipitation in China

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