Analysis of tropospheric NOx over Asia using the model of atmospheric transport and chemistry (MATCH-MPIC) and GOME-satellite observations

Kunhikrishnan, T.; Lawrence, M. G.; Kuhlmann, R. von; Richter, Andreas; Ladstätter-Weißenmayer, A.; Burrows, J. P.

doi:10.1016/j.atmosenv.2003.09.074

Cited by 87 publications

(74 citation statements)

References 34 publications

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“…2.2). The basic assumption of steady state has also been made in earlier studies by Leue et al (2001), Beirle et al (2003) and Kunhikrishnan et al (2004). It disregards the horizontal NO x transport into and out of the column.…”

Section: Comparison Of Nomentioning

confidence: 99%

SCIAMACHY tropospheric NO2 over Switzerland: estimates of NOx lifetimes and impact of the complex Alpine topography on the retrieval

et al. 2007

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Abstract. This study evaluates NO 2 vertical tropospheric column densities (VTCs) retrieved from measurements of the Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) above Switzerland and the Alpine region. The close correlation between pixel averaged NO x emission rates from a spatially and temporally highly resolved inventory and the NO 2 VTCs under anticyclonic meteorological conditions demonstrates the general ability of SCIAMACHY to detect sources of NO x pollution in Switzerland. This correlation is further used to infer seasonal mean NO x lifetimes carefully taking into account the influence of the strong diurnal cycle in NO x emissions on these estimates. Lifetimes are estimated to 3.6 (±0.8) hours in summer and 13.1 (±3.8) hours in winter, the winter value being somewhat lower than previous estimates. A comparison between the 2003-2005 mean NO 2 VTC distribution over Switzerland and the corresponding 1996-2003 mean from the Global Ozone Monitoring Experiment (GOME) illustrates the much better capability of SCIAMACHY to resolve regional scale pollution features. However, the comparison of seasonal averages over the Swiss Plateau with GOME and ground based in situ observations indicates that SCIAMACHY exhibits a too weak seasonal cycle with comparatively high values in summer and low values in winter. A problem likely contributing to the reduced values in winter (not reported in earlier literature) is the use of inaccurate satellite pixel surface pressures derived from a coarse resolution global model in the retrieval. The marked topography in the Alpine region can lead to deviations of several hundred meters between the model assumed and the real pixel-averaged surface height. A Correspondence to: D. Brunner (dominik.brunner@empa.ch) sensitivity study based on selected clear sky SCIAMACHY NO 2 VTCs over the Swiss Plateau and two fixed a priori NO 2 profile shapes indicates that inaccurate pixel surface pressures affect retrieved NO 2 columns over complex terrain by up to 40%. For retrievals in the UV-visible spectral range with a decreasing sensitivity towards the earth's surface, this effect is of major importance when the NO 2 resides close to the ground, a situation most frequently observed during winter.

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Section: Comparison Of Nomentioning

confidence: 99%

SCIAMACHY tropospheric NO2 over Switzerland: estimates of NOx lifetimes and impact of the complex Alpine topography on the retrieval

et al. 2007

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“…9 (Case II) according to Fu et al's suggestions (2007). Therefore, it should be noted that although the CTM-calculated NO 2 columns without BVOC emissions (e.g., Kunhikrishnan et al, 2004;Ma et al, 2006;van Noije et al, 2006;Uno et al, 2007) are similar to those with BVOC emissions (e.g., this study), the detailed chemistry behind the similar CTM-derived NO 2 levels would be completely different.…”

Section: Summer Anomaly In No 2 Columns Over East Asiamentioning

confidence: 65%

“…von Horowitz et al, 2007;more references therein). Although the CBM4 mechanism in this study has limitation to deal with the organic nitrate formation and recycling (e.g., CBM4 does not consider the recycling reactions of organic nitrates to NO 2 ), the above discussion has possibly important implications in comparison studies between the CTM-calculated and satellite-derived NO 2 columns (e.g., Kunhikrishnan et al, 2004;Ma et al, 2006;van Noije et al, 2006;Uno et al, 2007). For example, van Noije et al (2006) carried out 17 global CTM ensemble simulations of tropospheric NO 2 columns, and compared the results with the GOME-retrieved NO 2 columns for the year 2000.…”

Section: Summer Anomaly In No 2 Columns Over East Asiamentioning

confidence: 99%

“…Such increases in NO x emissions over China were confirmed partly by a bottom-up emission inventory study . In order to test the accuracy of NO x emissions, several studies were carried out over East Asia comparing the 3-D model-predicted NO 2 columns with satellite-derived NO 2 columns (Kunhikrishnan et al, 2004;Ma et al, 2006;van Noije et al, 2006;Uno et al, 2007). The comparisons revealed large inconsistencies between the NO 2 columns from the 3-D CTM (Chemistry-Transport Model) simulations and the satellitederived NO 2 columns.…”

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confidence: 99%

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Investigation of NOx emissions and NOx-related chemistry in East Asia using CMAQ-predicted and GOME-derived NO2 columns

et al. 2009

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Abstract. In this study, NO 2 columns from the US EPA Models-3/CMAQ model simulations carried out using the 2001 ACE-ASIA (Asia Pacific Regional Aerosol Characterization Experiment) emission inventory over East Asia were compared with the GOME-derived NO 2 columns. There were large discrepancies between the CMAQ-predicted and GOME-derived NO 2 columns in the fall and winter seasons. In particular, while the CMAQ-predicted NO 2 columns produced larger values than the GOME-derived NO 2 columns over South Korea for all four seasons, the CMAQ-predicted NO 2 columns produced smaller values than the GOMEderived NO 2 columns over North China for all seasons with the exception of summer (summer anomaly). It is believed that there might be some error in the NO x emission estimates as well as uncertainty in the NO x chemical loss rates over North China and South Korea. Regarding the latter, this study further focused on the biogenic VOC (BVOC) emissions that were strongly coupled with NO x chemistry during summer in East Asia. This study also investigated whether the CMAQ-modeled NO 2 /NO x ratios with the possibly overestimated isoprene emissions were higher than those with reduced isoprene emissions. Although changes in both the NO x chemical loss rates and NO 2 /NO x ratios from CMAQmodeling with the different isoprene emissions affected the CMAQ-modeled NO 2 levels, the effects were found to be limited, mainly due to the low absolute levels of NO 2 in Correspondence to: C. H. Song (chsong@gist.ac.kr) summer. Seasonal variations of the NO x emission fluxes over East Asia were further investigated by a set of sensitivity runs of the CMAQ model. Although the results still exhibited the summer anomaly possibly due to the uncertainties in both NO x -related chemistry in the CMAQ model and the GOME measurements, it is believed that consideration of both the seasonal variations in NO x emissions and the correct BVOC emissions in East Asia are critical. Overall, it is estimated that the NO x emissions are underestimated by ∼57.3% in North China and overestimated by ∼46.1% in South Korea over an entire year. In order to confirm the uncertainty in NO x emissions, the NO x emissions over South Korea and China were further investigated using the ACE-ASIA, REAS (Regional Emission inventory in ASia), and CAPSS (Clean Air Policy Support System) emission inventories. The comparison between the CMAQ-calculated and GOME-derived NO 2 columns indicated that both the ACE-ASIA and REAS inventories have some uncertainty in NO x emissions over North China and South Korea, which can also lead to some errors in modeling the formation of ozone and secondary aerosols in South Korea and North China.

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“…여기에서, X rtv : retrieved gas profile (Han et al, , 2009Uno et al, 2007), HCHO (Han et al, , 2009Uno et al, 2007;Ma et al, 2006;Kunhikrishnan et al, 2004). 상향식 NO x 배출량 자료의 불확실성을 보완하기 위하여 최근, 모 델링과 인공위성 관측 자료를 활용한 하향식 접근법 의 NO x 배출량 산출 방안이 제시되고 있고 (Lin et al, 2010;Boersma et al, 2008;Wang et al, 2007;Jaeglé et al, 2005;Martin et al, 2003;Leue et al, 2001) (Colette et al, 2012;Park et al, 2011).…”

Section: 대기질 모델링의 현황과 발전방향unclassified

Current Status and Development of Modeling Techniques for Forecasting and Monitoring of Air Quality over East Asia

Park¹,

Han²,

Song

et al. 2013

Journal of Korean Society for Atmospheric Environment

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Analysis of tropospheric NOx over Asia using the model of atmospheric transport and chemistry (MATCH-MPIC) and GOME-satellite observations

Cited by 87 publications

References 34 publications

SCIAMACHY tropospheric NO<sub>2</sub> over Switzerland: estimates of NO<sub>x</sub> lifetimes and impact of the complex Alpine topography on the retrieval

SCIAMACHY tropospheric NO<sub>2</sub> over Switzerland: estimates of NO<sub>x</sub> lifetimes and impact of the complex Alpine topography on the retrieval

Investigation of NO<sub>x</sub> emissions and NO<sub>x</sub>-related chemistry in East Asia using CMAQ-predicted and GOME-derived NO<sub>2</sub> columns

Current Status and Development of Modeling Techniques for Forecasting and Monitoring of Air Quality over East Asia

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Analysis of tropospheric NOx over Asia using the model of atmospheric transport and chemistry (MATCH-MPIC) and GOME-satellite observations

Cited by 87 publications

References 34 publications

SCIAMACHY tropospheric NO&lt;sub&gt;2&lt;/sub&gt; over Switzerland: estimates of NO&lt;sub&gt;x&lt;/sub&gt; lifetimes and impact of the complex Alpine topography on the retrieval

SCIAMACHY tropospheric NO&lt;sub&gt;2&lt;/sub&gt; over Switzerland: estimates of NO&lt;sub&gt;x&lt;/sub&gt; lifetimes and impact of the complex Alpine topography on the retrieval

Investigation of NO&lt;sub&gt;x&lt;/sub&gt; emissions and NO&lt;sub&gt;x&lt;/sub&gt;-related chemistry in East Asia using CMAQ-predicted and GOME-derived NO&lt;sub&gt;2&lt;/sub&gt; columns

Current Status and Development of Modeling Techniques for Forecasting and Monitoring of Air Quality over East Asia

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SCIAMACHY tropospheric NO<sub>2</sub> over Switzerland: estimates of NO<sub>x</sub> lifetimes and impact of the complex Alpine topography on the retrieval

SCIAMACHY tropospheric NO<sub>2</sub> over Switzerland: estimates of NO<sub>x</sub> lifetimes and impact of the complex Alpine topography on the retrieval

Investigation of NO<sub>x</sub> emissions and NO<sub>x</sub>-related chemistry in East Asia using CMAQ-predicted and GOME-derived NO<sub>2</sub> columns