Impact of typhoon Soudelor on ozone and water vapor in the Asian monsoon anticyclone western Pacific mode

Li, Dan; Bian, Jianchun; Zhang, Xin; Vogel, Bärbel; Müller, Rolf; Günther, G.

doi:10.1002/asl.1147

Cited by 2 publications

(1 citation statement)

References 41 publications

(59 reference statements)

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“…Thus marine air reaching the UTLS 140 − 100 hPa at Nainital is the reason for low ozone and no ATAL on 15th August 2016. This observation is consistent with previous work, where also an impact of air-masses uplifted in a typhoon on the chemical composition of monsoon air was identi ed 37,38,39,40 .…”

Section: Comparison Of Ozone Pro Les On a Special Case Day 15 August ...supporting

confidence: 93%

Comparison of ozone sonde measurements in the upper troposphere and lower Stratosphere at Nainital, India during StratoClim with renalysis and chemistry-climate model data

Fadnavis

2023

Preprint

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The variability and trend of ozone (O3) in the Upper troposphere and Lower Stratosphere (UTLS) over the Asian region needs to be accurately quantified. A major challenge for understanding ozone chemistry is sparse observations in the region and thus the representation of precursor gases in model emission inventories. Here, we evaluate ozonesonde measurements during August 2016 at Nainital, in the Himalayas, against ozone from multiple reanalyses and the ECHAM6-HAMMOZ model. We find that compared to measurements both reanalyses and ECHAM6-HAMMOZ control simulation overestimate ozone mixing ratios in the troposphere (20 ppb) and in the UTLS (55 ppb). We performed sensitivity simulations using the ECHAM6-HAMMOZ model for a 50% reduction in the emission of (1) NOx and (2) VOCs. The model simulations with NOX reduction agree better with the ozonesonde observations in the lower troposphere and in the UTLS. Thus, neither reanalysis nor ECHAM6-HAMMOZ can reproduce observed O3 over the South Asian region. For a better representation of O3 in the ECHAM6-HAMMOZ model, NOX emission should be reduced by 50% in the emission inventory. A larger number of observations over the South Asian region would improve the assessment of ozone chemistry in models.

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Section: Comparison Of Ozone Pro Les On a Special Case Day 15 August ...supporting

confidence: 93%

Comparison of ozone sonde measurements in the upper troposphere and lower Stratosphere at Nainital, India during StratoClim with renalysis and chemistry-climate model data

Fadnavis

2023

Preprint

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Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data

Sagalgile

Sonbawne

Vogel

et al. 2023

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The variability and trend of ozone (O3) in the Upper troposphere and Lower Stratosphere (UTLS) over the Asian region needs to be accurately quantified. Ozone in the UTLS radiatively heats this region and cools the upper parts of the stratosphere. This results in an impact on relative humidity, static stability in the UTLS region and tropical tropopause temperature. A major challenge for understanding ozone chemistry in the UTLS is sparse observations and thus the representation of precursor gases in model emission inventories. Here, we evaluate ozonesonde measurements during August 2016 at Nainital, in the Himalayas, against ozone from multiple reanalyses and the ECHAM6-HAMMOZ model. We find that compared to measurements both reanalyses and ECHAM6-HAMMOZ control simulation overestimate ozone mixing ratios in the troposphere (20 ppb) and in the UTLS (55 ppb). We performed sensitivity simulations using the ECHAM6-HAMMOZ model for a 50% reduction in the emission of (1) NOx and (2) VOCs. The model simulations with NOX reduction agree better with the ozonesonde observations in the lower troposphere and in the UTLS. Thus, neither reanalyses nor ECHAM6-HAMMOZ results can reproduce observed O3 over the South Asian region. For a better representation of O3 in the ECHAM6-HAMMOZ model, NOX emission should be reduced by 50% in the emission inventory. A larger number of observations of ozone and precursor gases over the South Asian region would improve the assessment of ozone chemistry in models.

show abstract

Impact of typhoon Soudelor on ozone and water vapor in the Asian monsoon anticyclone western Pacific mode

Cited by 2 publications

References 41 publications

Comparison of ozone sonde measurements in the upper troposphere and lower Stratosphere at Nainital, India during StratoClim with renalysis and chemistry-climate model data

Comparison of ozone sonde measurements in the upper troposphere and lower Stratosphere at Nainital, India during StratoClim with renalysis and chemistry-climate model data

Comparison of ozonesonde measurements in the upper troposphere and lower Stratosphere in Northern India with reanalysis and chemistry-climate-model data

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