The intraseasonal variability of winter semester surface air temperature in Antarctica

Yu, Lejiang; Zhang, Zhanhai; Zhou, Mingyu; Zhong, Shiyuan; Sun, Bо; Hsu, Hsiao-Ming; Gao, Zhiqiu; Wu, Huiding; Ban, Jie

doi:10.3402/polar.v30i0.6039

Cited by 8 publications

(11 citation statements)

References 93 publications

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“…Interestingly, we obtained that restricting the analysis to the local winter when a strong variability is observed in the surface air temperature [see also Yu et al ., ], the time series of the pulsation power and temperature appear significantly correlated, with the temperature delayed by a few days. The correlation is higher with the Pc1‐2 power than with the Pc5 power, as can be expected since, while the Pc5 pulsations have a role in the acceleration of the electrons, atmospheric changes are directly related to the energetic electron precipitation caused by the Pc1‐2 pulsations.…”

Section: Discussionmentioning

confidence: 99%

“…The same periodicities were reported by several authors [ Lei et al ., ; Tayer et al ., ; Tulasi Ram et al ., ] in the SW speed, in the coronal hole areas where the SW streams are rooted, in the geomagnetic activity index Kp , and in the thermosphere/ionosphere system during the declining phase of the solar cycle 23. Moreover, it is worth to note that Yu et al [], using a 29 year reanalysis data set, revealed the existence of two major oscillations with periods of 26–30 days and 14 days in the surface air temperature in Antarctica during the local winter.…”

Section: Discussionmentioning

confidence: 99%

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Signatures of the ULF geomagnetic activity in the surface air temperature in Antarctica

2015

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The variations of the Pc5 and Pc1‐2 ULF power and surface air temperature measured at Terra Nova Bay in Antarctica have been analyzed during the late declining phase of solar cycle 23 (2007–2008), in comparison with the simultaneous variations of the solar wind speed. The analysis focused on time scales of several days, which characterize the evolution of the solar wind stream structure. The temperature variations appear clearly during the local winters, while they are strongly reduced in the sunlit summers. During the local winters, the Pc5 and Pc1‐2 power and the temperature variations are significantly correlated, with the temperature delayed by a few days with respect to the ULF power. A time‐frequency analysis revealed common signals in the temperature and ULF power at periodicities related to the Sun's rotation period (~27, 13.5, and 9 days), which, in the same time intervals, characterize the solar wind speed and geomagnetic activity.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Signatures of the ULF geomagnetic activity in the surface air temperature in Antarctica

2015

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“…Tsup mostrou um pico estatisticamente significativo (α=95%) em 78 dias em todas as estações analisadas, i.e., dentro da banda IS. Yu et al (2011) identificaram dois períodos importantes na variabilidade da temperatura do ar a 2m na Antártica e no Oceano Austral em 29 invernos utilizando dados das reanálises II do NCEP/NCAR: 26-30 dias e 13-14 dias. No entanto, Lima e Carvalho (2008) observaram o mesmo sinal encontrado no presente estudo nas anomalias de gelo marinho nos mares de Amundsen e Bellingshausen.…”

Section: Resultsunclassified

“…Nos últimos 12 anos analisados (1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009) Durante os eventos IS de Tsup na Península Antártica na primavera, observa-se um trem de ondas entre latitudes médias e altas do HS propagando-se para leste (Figura 3 e Figura 4). Este padrão é semelhante ao observado por diversos estudos (e.g., Lima e Carvalho, 2008;Yu et al, 2011), conhecido como o padrão PSA. A presença de anomalias negativas (ciclônicas) estatisticamente significativas de H200IS sobre a Península Antártica foi observada durante os EIF (Figure 3).…”

Section: Resultsunclassified

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Variabilidade Intrassazonal Extrema Da Temperatura Do Ar À Superfície Na Península Antártica

Boiaski

Ferraz

Tatsch

2014

CeN

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A Península Antártica (PA) é uma das regiões da Terra onde o aquecimento foi mais acelerado nos últimos 50 anos. Há indícios de que esta tendência esteja associada, em parte, ao aumento da atividade intrasazonal (IS) tropical. Utilizando dados de estações, este estudo mostrou que a variabilidade da temperatura do ar à superfície (Tsup) sobre a PA apresenta um pico estatisticamente significativo na escala IS (78 dias). A influência da Oscilação Madden-Julian (MJO) sobre os eventos IS da Tsup na PA foi quantificada: mais de 60% dos eventos foram associados à MJO, via trem de ondas de Rossby com periodicidade em torno de 30-40 dias. Portanto, outros mecanismos precisam ser investigados para explicar a variabilidade IS da Tsup na PA não associada à MJO (NMJO). Tanto os eventos NMJO quanto o total de eventos (MJO + NMJO) foram mais frequentes na primavera. Além disso, nos últimos 12 anos analisados (1998-2009) houve uma maior frequência de eventos MJO do que NMJO, principalmente na primavera e no inverno.

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Austral summer foehn winds over the McMurdo dry valleys of Antarctica from Polar WRF

Steinhoff

Bromwich

Speirs

et al. 2014

Q.J.R. Meteorol. Soc.

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The intraseasonal variability of winter semester surface air temperature in Antarctica

Cited by 8 publications

References 93 publications

Signatures of the ULF geomagnetic activity in the surface air temperature in Antarctica

Signatures of the ULF geomagnetic activity in the surface air temperature in Antarctica

Variabilidade Intrassazonal Extrema Da Temperatura Do Ar À Superfície Na Península Antártica

Austral summer foehn winds over the McMurdo dry valleys of Antarctica from Polar WRF

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