Relationships between ten-year trends of tropospheric ozone and temperature over Taiwan

Hsu, Kuan-Lun

doi:10.1016/j.scitotenv.2007.01.003

Cited by 11 publications

(10 citation statements)

References 29 publications

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“…Many factors exist simultaneously at different times or locations and the real system is much complicated. However, several studies suggest that climate impacts and especially temperatures are strong enough to affect the tropospheric ozone distribution (Hsu 2007;Valero et al 1992).…”

Section: Introductionmentioning

confidence: 99%

On the impact of temperature on tropospheric ozone concentration levels in urban environments

et al. 2008

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The influence of temperature on tropospheric ozone (O 3 ) concentrations in urban and photochemically polluted areas in the greater Athens region are investigated in the present study. Hourly values of the ambient air temperature used for studying the urban heat island effect in Athens were recorded at twenty-three experimental stations while ozone concentration values were measured at three of the above-mentioned stations and for a period of two years (1996)(1997). The linear correlation between ozone concentration and air temperature values as well as the temporal variation of temperature and ozone concentration, for the above-mentioned experimental stations, were calculated and analysed. Moreover, a neural network approach was used for investigating the impact of temperature on the ozone concentration values over the greater Athens area. The neural network model used ambient air temperature as one of its input parameters and it was found that temperature is a predominant parameter, affecting considerably the ozone concentration values.

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Section: Introductionmentioning

confidence: 99%

On the impact of temperature on tropospheric ozone concentration levels in urban environments

et al. 2008

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“…Recently, using three different ozone databases, Solomon et al (2012) found that the decrease of tropical lowerstratospheric ozone in recent decades is uncertain, and this leads to similar uncertainties in the cooling of the tropical lower stratosphere. Using 10 years of ozonesonde observations over Taipei, Hsu (2007) reported that the trends of temperature and ozone are inversely correlated with each other from the middle troposphere up to the lower stratosphere. Chae and Sherwood (2007) suggested that the annual cycle of ozone in the tropical tropopause layer plays an important role in modulating that of temperature.…”

Section: B Ozone Trend At the Utls Regionmentioning

confidence: 99%

“…Bencherif et al (2006) estimated the long-term trends at different levels in the UTLS region over Durban, South Africa, and found cooling trends at all levels with a maximum cooling rate of 1.098 6 0.278C decade 21 at 70 hPa. Hsu (2007) found that temperature over Taipei was warming (0.48-0.58C decade 21 ) in the middle to higher troposphere and cooling (about 228C decade 21 ) in the lower stratosphere from 1993 to 2002. Over Taipei, using radiosonde data, Thulasiraman et al (1999) studied the temporal characteristics of the tropopause from 1990 to 1995 and confirmed that the tropopause over Taipei was clearly reflecting the tropical tropopause characteristics observed elsewhere by other investigators.…”

Section: Introductionmentioning

confidence: 99%

Trends in Monthly Tropopause Characteristics Observed over Taipei, Taiwan*

Raman

Chen

2014

Journal of the Atmospheric Sciences

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This study presents monthly trends in the cold-point tropopause (CPT), calculated using three decades of radiosonde data from 1981 to 2010 over Taipei, Taiwan (25801 0 N, 121827 0 E). Multivariate regression analysis has been used to suppress the effect of natural variations, such as quasi-biennial oscillation (QBO), ENSO, solar cycle, and volcanic eruptions. From the continuous time series, statistically insignificant heating and a decrease in the height of CPT are observed. However, the trends estimated using individual monthly time series revealed new features with statistically significant increasing trends in CPT temperature at a rate of approximately 0.038C yr 21 and statistically significant decreasing trends in CPT height at a rate of approximately 4.7 m yr 21 during summer months. An enhanced heating rate in the upper troposphere along with a suppressed cooling rate in the lower stratosphere observed over Taipei might have caused the tropopause heating trend during summer. The possible relationship between tropopause trends and lower-stratospheric ozone is also examined. The seasonal and spatial variations in trends estimated using NCEP-Climate Forecast System Reanalysis (CFSR) data reveal the spatial heterogeneity in CPT temperature trends. Initial inspection of monthly trends in tropopause characteristics suggests that the estimation of tropopause trends using the continuous time series may not exactly represent the long-term variability of individual months or seasons.

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“…The rise in ozone content in the stratosphere occurred when cold front reached the ground level. Climatic impacts, especially temperatures, were strong enough to affect the tropospheric ozone distribution (Valero et al 1992;Hsu 2007). Temperature and long term urban warming had a serious impact on urban pollution, resulting in higher ozone concentrations, as heat accelerates the chemical reactions in the atmosphere (Clark and Karl 1982;Walcek and Yuan 1999).…”

Section: Introductionmentioning

confidence: 99%

Effect of some climatic parameters on tropospheric and total ozone column over Alipore (22.52 ∘ N, 88.33 ∘ E), India

Jana¹,

Bhattacharyya²,

Banerjee³

2014

J Earth Syst Sci

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Relationships between ten-year trends of tropospheric ozone and temperature over Taiwan

Cited by 11 publications

References 29 publications

On the impact of temperature on tropospheric ozone concentration levels in urban environments

On the impact of temperature on tropospheric ozone concentration levels in urban environments

Trends in Monthly Tropopause Characteristics Observed over Taipei, Taiwan*

Effect of some climatic parameters on tropospheric and total ozone column over Alipore (22.52 ∘ N, 88.33 ∘ E), India

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