The season peculiarities of behaviour of the long-term temperature trends in the middle atmosphere on the mid-latitudes

Semenov, A. I.; Shefov, N. N.; Lysenko, E. V.; Givishvili, G. V.; Tikhonov, Anatoly

doi:10.1016/s1474-7065(02)00034-7

Cited by 49 publications

(47 citation statements)

References 22 publications

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“…The temperature trend found for this case is 0.41 K decade −1 . This differs from results found at this particular height which show decreasing trends, such as by Reisin and Scheer (2002) and Semenov et al (2002).…”

Section: Temperature Trend and Variability Analysescontrasting

confidence: 99%

“…Lowe (1999Lowe ( , 2002 and Semenov et al (2002) worked around the same period of time as this paper and found similar results. The first indicated that the temperature trend at heights around 87 km would be 0.6 K decade −1 , while the second authors estimated the trend to be 0.3 K decade −1 at similar heights.…”

Section: Temperature Trend and Variability Analysessupporting

confidence: 76%

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Mesopause region temperature variability and its trend in southern Brazil

et al. 2018

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Abstract. Nowadays, the study of the upper atmosphere is increasing, mostly because of the need to understand the patterns of Earth's atmosphere. Since studies on global warming have become very important for the development of new technologies, understanding all regions of the atmosphere becomes an unavoidable task. In this paper, we aim to analyze the temperature variability and its trend in the mesosphere and lower thermosphere (MLT) region during a period of 12 years (from 2003 to 2014). For this purpose, three different heights, i.e., 85, 90 and 95 km, were focused on in order to investigate the upper atmosphere, and a geographic region different to other studies was chosen, in the southern region of Brazil, centered in the city of Santa Maria, RS (29 • 41 02 S; 53 • 48 25 W). In order to reach the objectives of this work, temperature data from the SABER instrument (Sounding of the Atmosphere using Broadband Emission Radiometry), aboard NASA's Thermosphere Ionosphere Mesosphere Energetics Dynamics (TIMED) satellite, were used. Finally, two cases were studied related to distinct grids of latitude/longitude used to obtain the mean temperature profiles. The first case considered a grid of 20 • × 20 • lat/long, centered in Santa Maria, RS, Brazil. In the second case, the region was reduced to a size of 15 • × 15 • in order to compare the results and discuss the two cases in terms of differences or similarities in temperature trends. Observations show that the size of the geographical area used for the average temperature profiles can influence the results of variability and trend of the temperature. In addition, reducing the time duration of analyses from 24 to 12 h a day also influences the trend significantly. For the smaller geographical region (15 • × 15 • ) and the 12 h daily time window (09:00-21:00 UT) it was found that the main contributions for the temperature variability at the three heights were the annual and semi-annual cycles and the solar flux influence. A smaller trend (−0.02 ± 0.16 % decade −1 ) was found at 90 km height and small positive trends (0.58 ± 0.26 % and 0.41 ± 0.19 % decade −1 ) were found at altitudes of 85 and 95 km, respectively.. Keywords. Atmospheric composition and structure (middle atmosphere -composition and chemistry; pressure density and temperature) -meteorology and atmospheric dynamics (climatology)

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Section: Temperature Trend and Variability Analysescontrasting

confidence: 99%

Section: Temperature Trend and Variability Analysessupporting

confidence: 76%

Mesopause region temperature variability and its trend in southern Brazil

et al. 2018

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“…Shefov, 1969;Myrabo, 1986;Sahai et al, 1996;Bittner et al, 2000) and long-term linear trends (e.g. Golitsyn et al, 1996;Semenov et al, 2002) in the OH layer, often from comparisons of annual averages derived for the whole, or large part, of each year.…”

Section: Introductionmentioning

confidence: 99%

The influence of large-scale oscillations on long-term trend assessment in hydroxyl temperatures over Davis, Antarctica

French

Burns

2004

Journal of Atmospheric and Solar-Terrestrial Physics

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“…and that above (solar cycle influences, geomagnetic activity, etc.). The temperatures appear to be dependent not only on the time but also on other parameters, such as latitude, longitude, and season (Espy and Stegman, 2002;Semenov et al, 2002; Beig et al, 2003). In this context, the striking similarity in the mesopause temperatures during different solar activity epochs as presented here needs to be further investigated.…”

Section: Resultsmentioning

confidence: 75%

A comparison of optically measured daytime OH temperatures over the tropics during solar maximum and minimum periods

et al. 2010

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This paper deals with the variability of optically measured daytime OH temperatures during two different solar activity epochs, over Trivandrum (8.5 • N, 76.5• E), a tropical station in India. The data used for the present study span the period of February-March, during the solar maximum year of 2001 and solar minimum year of 2005. The mean daytime temperature (180±5 K) during the 2001 study period was found to be lower than the mean temperature (195±9 K) of the 2005 study period by ∼15 K. However, apart from this noticeable shift in mean temperature level, the variabilities in the temperature of both years were strikingly similar. Moreover, the wave periodicities present during these periods were also quite similar. Possible reasons for these observations were investigated in the context of the various forcings that control the energetics of the equatorial mesopause region. The observations presented in this study are unique and reveal a number of newer aspects of the energetics of the tropical mesopause.

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The season peculiarities of behaviour of the long-term temperature trends in the middle atmosphere on the mid-latitudes

Cited by 49 publications

References 22 publications

Mesopause region temperature variability and its trend in southern Brazil

Mesopause region temperature variability and its trend in southern Brazil

The influence of large-scale oscillations on long-term trend assessment in hydroxyl temperatures over Davis, Antarctica

A comparison of optically measured daytime OH temperatures over the tropics during solar maximum and minimum periods

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