First simultaneous space measurements of atmospheric pollutants in the boundary layer from IASI: A case study in the North China Plain

Boynard, Anne; Clerbaux, Cathy; Clarisse, Lieven; Safieddine, Sarah; Pommier, Matthieu; Damme, Martin Van; Bauduin, Sophie; Oudot, Charlotte; Hadji‐Lazaro, Juliette; Hurtmans, Daniel; Coheur, Pierre‐François

doi:10.1002/2013gl058333

Cited by 65 publications

(60 citation statements)

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“…These 3-year MAX-DOAS SO 2 measurements in Xianghe constitute a unique data set for validating and improving spaceborne observations over China, which is the region in the world where anthropogenic SO 2 emissions are the largest Boynard et al, 2014). In particular, retrieved SO 2 vertical profiles can be used as a priori information for the AMF calculation in satellite retrievals.…”

Section: Discussionmentioning

confidence: 99%

“…So far, the SO 2 surface concentration has been monitored using in situ and long-path DOAS (differential optical absorption spectroscopy) instruments (Meng et al, 2009), while satellite sensors like GOME, SCIAMACHY, GOME-2, OMI, OMPS, and IASI have shown their ability to measure the SO 2 vertical column density (VCD) over polluted areas (see, e.g., Eisinger and Burrows, 1998;Krotkov et al, 2006;Lee et al, 2009;Nowlan et al, 2011;Fioletov et al, 2013;Yang et al, 2013;Boynard et al, 2014). During the last decade, a new remote sensing technique called MAX-DOAS (multi-axis differential optical absorption spectroscopy) has been developed, providing information on both VCD and vertical distribution of trace gases in the troposphere (Hön-ninger et al, 2004;Platt and Stutz, 2008).…”

Section: T Wang Et Al: Evaluation Of Tropospheric So 2 In Xianghementioning

confidence: 99%

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Evaluation of tropospheric SO2 retrieved from MAX-DOAS measurements in Xianghe, China

et al. 2014

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Abstract. Ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements of sulfur dioxide (SO 2 ) have been performed at the Xianghe station (39.8 • N, 117.0 • E) located at ∼ 50 km southeast of Beijing from March 2010 to February 2013. Tropospheric SO 2 vertical profiles and corresponding vertical column densities (VCDs), retrieved by applying the optimal estimation method to the MAX-DOAS observations, have been used to study the seasonal and diurnal cycles of SO 2 , in combination with correlative measurements from in situ instruments, as well as meteorological data. A marked seasonality was observed in both SO 2 VCD and surface concentration, with a maximum in winter (February) and a minimum in summer (July). This can be explained by the larger emissions in winter due to the domestic heating and, in case of surface concentration, by more favorable meteorological conditions for the accumulation of SO 2 close to the ground during this period. Wind speed and direction are also found to be two key factors in controlling the level of the SO 2 -related pollution at Xianghe. In the case of east or southwest wind, the SO 2 concentration does not change significantly with the wind speed, since the city of Tangshan and heavy polluting industries are located to the east and southwest of the station, respectively. In contrast, when wind comes from other directions, the stronger the wind, the less SO 2 is observed due to a more effective dispersion. Regarding the diurnal cycle, the SO 2 amount is larger in the early morning and late evening and lower at noon, in line with the diurnal variation of pollutant emissions and atmospheric stability. A strong correlation with correlation coefficients between 0.6 and 0.9 is also found between SO 2 and aerosols in winter, suggesting that anthropogenic SO 2 , through the formation of sulfate aerosols, contributes significantly to the total aerosol content during this season. The observed diurnal cycles of MAX-DOAS SO 2 surface concentration are also in very good agreement (correlation coefficient close to 0.9) with those from collocated in situ data, indicating the good reliability and robustness of our retrieval.

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Section: Discussionmentioning

confidence: 99%

Section: T Wang Et Al: Evaluation Of Tropospheric So 2 In Xianghementioning

confidence: 99%

Evaluation of tropospheric SO2 retrieved from MAX-DOAS measurements in Xianghe, China

et al. 2014

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“…Looking at interannual variability, for example in 2013, the fertilization peaks of March, July and October are clearly observed . It is interesting to note that the highest January surface concentration (5.1 µg m −3 ) and satellite total column (7.8 ×10 15 molec cm −2 ) are measured during the severe winter pollution episode of 2013 (see Boynard et al, 2014;Wang et al, 2014). The correlation analysis for the monthly values of the 43 NNDMN sites gives a Pearson's r equal to 0.39 (considering the IASI data with a monthly relative retrieval error below 100 %) and a slope of the regression equal to 0.21 (n = 1149).…”

Section: Regional Focusmentioning

confidence: 99%

Towards validation of ammonia (NH3) measurements from the IASI satellite

et al. 2015

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Abstract. Limited availability of ammonia (NH 3 ) observations is currently a barrier for effective monitoring of the nitrogen cycle. It prevents a full understanding of the atmospheric processes in which this trace gas is involved and therefore impedes determining its related budgets. Since the end of 2007, the Infrared Atmospheric Sounding Interferometer (IASI) satellite has been observing NH 3 from space at a high spatio-temporal resolution. This valuable data set, already used by models, still needs validation. We present here a first attempt to validate IASI-NH 3 measurements using existing independent ground-based and airborne data sets. The yearly distributions reveal similar patterns between ground-based and space-borne observations and highlight the scarcity of local NH 3 measurements as well as their spatial heterogeneity and lack of representativity. By comparison with monthly resolved data sets in Europe, China and Africa, we show that IASI-NH 3 observations are in fair agreement, but they are characterized by a smaller variation in concentrations. The use of hourly and airborne data sets to compare with IASI individual observations allows investigations of the impact of averaging as well as the representativity of independent observations for the satellite footprint. The importance of considering the latter and the added value of densely located airborne measurements at various altitudes to validate IASI-NH 3 columns are discussed. Perspectives and guidelines for future validation work on NH 3 satellite observations are presented.

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“…It is located in the northern China around Bohai Sea and comprises Beijing and Tianjin municipalities as well as part of Hebei, Liaoning and Shandong provinces. This region has been facing serious air pollution problems (including carbonaceous aerosols) (Boynard et al, 2014), due to dramatic increase in urbanization, industrialization and large-scale farming activities in the recent years. Some statistical methods, such as positive matrix factorization, eigenvector model and chemical mass balance model were used to identify the sources of carbonaceous aerosols in the region.…”

Section: Introductionmentioning

confidence: 99%

Radiocarbon-based impact assessment of open biomass burning on regional carbonaceous aerosols in North China

Zong

Chen

Tian

et al. 2015

Science of The Total Environment

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• PM 2.5 and TSP samples collected at Yellow River Delta were analyzed for OC and EC.• OC, EC, TSP and PM 2.5 concentrations were higher in daytime than in nighttime.• Radiocarbon ( 14 C) tracer, backward trajectories, and fire counts were used for the analysis.• Agricultural waste open burning was a main contributor to summer PM 2.5 , OC and EC. a b s t r a c t a r t i c l e i n f o Samples of total suspended particulates (TSPs) and fine particulate matter (PM 2.5 ) were collected from 29th May to 1st July, 2013 at a regional background site in Bohai Rim, North China. Mass concentrations of particulate matter and carbonaceous species showed a total of 50% and 97% of the measured TSP and PM 2.5 levels exceeded the first grade national standard of China, respectively. Daily concentrations of organic carbon (OC) and elemental carbon (EC) were detected 7.3 and 2.5 μg m −3 in TSP and 5.2 and 2.0 μg m −3 in PM 2.5 , which accounted 5.8% and 2.0% of TSP while 5.6% and 2.2% for PM 2.5 , respectively. The concentrations of OC, EC, TSP and PM 2.5 were observed higher in the day time than those in the night time. The observations were associated with the emission variations from anthropogenic activities. Two merged samples representing from south and north source areas were selected for radiocarbon analysis. The radiocarbon measurements showed 74% of water-insoluble OC (WINSOC) and 59% of EC in PM 2.5 derived from biomass burning and biogenic sources when the air masses were from south region, and 63% and 48% for the air masses from north, respectively. Combined with backward trajectories and daily burned area, open burning of agricultural wastes was found to be predominating, which was confirmed by the potential source contribution function (PSCF).

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First simultaneous space measurements of atmospheric pollutants in the boundary layer from IASI: A case study in the North China Plain

Cited by 65 publications

References 50 publications

Evaluation of tropospheric SO<sub>2</sub> retrieved from MAX-DOAS measurements in Xianghe, China

Evaluation of tropospheric SO<sub>2</sub> retrieved from MAX-DOAS measurements in Xianghe, China

Towards validation of ammonia (NH<sub>3</sub>) measurements from the IASI satellite

Radiocarbon-based impact assessment of open biomass burning on regional carbonaceous aerosols in North China

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First simultaneous space measurements of atmospheric pollutants in the boundary layer from IASI: A case study in the North China Plain

Cited by 65 publications

References 50 publications

Evaluation of tropospheric SO&lt;sub&gt;2&lt;/sub&gt; retrieved from MAX-DOAS measurements in Xianghe, China

Evaluation of tropospheric SO&lt;sub&gt;2&lt;/sub&gt; retrieved from MAX-DOAS measurements in Xianghe, China

Towards validation of ammonia (NH&lt;sub&gt;3&lt;/sub&gt;) measurements from the IASI satellite

Radiocarbon-based impact assessment of open biomass burning on regional carbonaceous aerosols in North China

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Evaluation of tropospheric SO<sub>2</sub> retrieved from MAX-DOAS measurements in Xianghe, China

Evaluation of tropospheric SO<sub>2</sub> retrieved from MAX-DOAS measurements in Xianghe, China

Towards validation of ammonia (NH<sub>3</sub>) measurements from the IASI satellite