A Conservative Downscaling of Satellite-Detected Chemical Compositions: NO2 Column Densities of OMI, GOME-2, and CMAQ

A conservative downscaling technique was applied when comparing nitrogen dioxide (NO2) column densities from space-borne observations and a fine-scale regional model. The conservative downscaling was designed to enhance the spatial resolution of satellite measurements by applying the fine-scale spatial structure from the model, with strict mass conservation at each satellite footprint pixel level. With the downscaling approach, NO2 column densities from the Ozone Monitoring Instrument (OMI; 13 × 24 km nadir footprint resolution) and the Global Ozone Monitoring Experiment-2 (GOME-2; 40 × 80 km) show excellent agreement with the Community Multiscale Air Quality (CMAQ; 4 × 4 km) NO2 column densities, with R = 0.96 for OMI and R = 0.97 for GOME-2. We further introduce an approach to reconstruct surface NO2 concentrations by combining satellite column densities and simulated surface-to-column ratios from the model. Compared with the Environmental Protection Agency’s (EPA) Air Quality System (AQS) surface observations, the reconstructed surface concentrations show a good agreement; R = 0.86 for both OMI and GOME-2. This study demonstrates that the conservative downscaling approach is a useful tool to compare coarse-scale satellites with fine-scale models or observations in urban areas for air quality and emissions studies. The reconstructed fine-scale surface concentration field could be used for future epidemiology and urbanization studies.

[1]  Henk Eskes,et al.  Error analysis for tropospheric NO2 retrieval from space , 2004 .

[2]  Slobodan Nickovic,et al.  An Alternative Approach to Nonhydrostatic Modeling , 2001 .

[3]  Steffen Beirle,et al.  Highly Resolved Global Distribution of Tropospheric NO2 using GOME , 2003 .

[4]  Jeffrey M. Vukovich,et al.  Emission inventory development and processing for the Seasonal Model for Regional Air Quality (SMRAQ) project , 2000 .

[5]  H. Roussel,et al.  Spectral Mapping Reconstruction of Extended Sources , 2007, 0708.3745.

[6]  B. Brunekreef,et al.  Personal and outdoor nitrogen dioxide concentrations in relation to degree of urbanization and traffic density. , 2001, Environmental health perspectives.

[7]  John P. Burrows,et al.  Inverse modelling of the spatial distribution of NO x emissions on a continental scale using satellite data , 2005 .

[8]  J. Seinfeld,et al.  Atmospheric Chemistry and Physics: From Air Pollution to Climate Change , 1997 .

[9]  J. Staehelin,et al.  SCIAMACHY tropospheric NO 2 over Switzerland: estimates of NO x lifetimes and impact of the complex Alpine topography on the retrieval , 2007 .

[10]  F. L. Herron-Thorpe,et al.  Evaluation of a regional air quality forecast model for tropospheric NO 2 columns using the OMI/Aura satellite tropospheric NO 2 product , 2009 .

[11]  Henk Eskes,et al.  Detection of the trend and seasonal variation in tropospheric NO2 over China , 2006 .

[12]  Ivan E. Sutherland,et al.  Reentrant polygon clipping , 1974, Commun. ACM.

[13]  J. Veefkind,et al.  Comparison of tropospheric NO2 from in situ aircraft measurements with near-real-time and standard product data from OMI , 2008 .

[14]  A. S. Fruchter,et al.  Drizzle: A Method for the Linear Reconstruction of Undersampled Images , 1998 .

[15]  D. Jacob,et al.  Origin of ozone and NOx in the tropical troposphere: A photochemical analysis of aircraft observations over the South Atlantic basin , 1996 .

[16]  John P. Burrows,et al.  Satellite‐observed U.S. power plant NOx emission reductions and their impact on air quality , 2006 .

[17]  Henk Eskes,et al.  Averaging kernels for DOAS total-column satellite retrievals , 2003 .

[18]  K. F. Boersma,et al.  Near-real time retrieval of tropospheric NO 2 from OMI , 2006 .

[19]  William P L Carter,et al.  Documentation of the SAPRC-99 chemical mechanism for VOC reactivity assessment. Volume 2. , 2000 .

[20]  Michael Brauer,et al.  Assessment of the magnitude and recent trends in satellite-derived ground-level nitrogen dioxide over North America , 2015 .

[21]  J. Dudhia.  Numerical Study of Convection Observed during the Winter Monsoon Experiment Using a Mesoscale Two-Dimensional Model , 1989 .

[22]  Lin Su,et al.  Ground-Level NO2 Concentrations over China Inferred from the Satellite OMI and CMAQ Model Simulations , 2017, Remote. Sens..

[23]  R. Martin,et al.  Improved Satellite Retrievals of NO2 and SO2 over the Canadian Oil Sands and Comparisons with Surface Measurements , 2013 .

[24]  Alice B. Gilliland,et al.  A method for evaluating spatially-resolved NO x emissions using Kalman filter inversion, direct sensitivities, and space-based NO 2 observations , 2008 .

[25]  K. F. Boersma,et al.  Trends, seasonal variability and dominant NOx source derived from a ten year record of NO2 measured from space , 2008 .

[26]  Eric Bucsela,et al.  A high spatial resolution retrieval of NO 2 column densities from OMI: method and evaluation , 2011 .

[27]  John S. Kain,et al.  The Kain–Fritsch Convective Parameterization: An Update , 2004 .

[28]  F. Boersmaa,et al.  Validation of OMI Tropospheric NO2 Observations During INTEX-B and Application to Constrain NOx Emissions Over the Eastern United States and Mexico Please share how this access benefits you. Your story matters , 2008 .

[29]  William C. Skamarock,et al.  A time-split nonhydrostatic atmospheric model for weather research and forecasting applications , 2008, J. Comput. Phys..

[30]  J. Pleim.  A Combined Local and Nonlocal Closure Model for the Atmospheric Boundary Layer. Part II: Application and Evaluation in a Mesoscale Meteorological Model , 2007 .

[31]  Joseph P. Pinto,et al.  Ground-level nitrogen dioxide concentrations inferred from the satellite-borne Ozone Monitoring Instrument , 2008 .

[32]  J. Burrows,et al.  Increase in tropospheric nitrogen dioxide over China observed from space , 2005, Nature.

[33]  E. Mlawer,et al.  Radiative transfer for inhomogeneous atmospheres: RRTM, a validated correlated-k model for the longwave , 1997 .

[34]  S. Johnston,et al.  Personal exposure to nitrogen dioxide (NO2) and the severity of virus-induced asthma in children , 2003, The Lancet.

[35]  Julian D. Marshall,et al.  Remote sensing of exposure to NO2: Satellite versus ground-based measurement in a large urban area , 2013 .

[36]  Zev Ross,et al.  Nitrogen dioxide prediction in Southern California using land use regression modeling: potential for environmental health analyses , 2006, Journal of Exposure Science and Environmental Epidemiology.

[37]  Sean C. Solomon,et al.  On the role of nitrogen dioxide in the absorption of solar radiation , 1999 .

[38]  J. Dudhia,et al.  A Revised Approach to Ice Microphysical Processes for the Bulk Parameterization of Clouds and Precipitation , 2004 .

[39]  M. Steinbacher,et al.  Nitrogen oxide measurements at rural sites in Switzerland : Bias of conventional measurement techniques , 2007 .

[40]  David G. Streets,et al.  A high-resolution and observationally constrained OMI NO 2 satellite retrieval , 2017 .

[41]  R Urbanek,et al.  Traffic-related NO2 and the prevalence of asthma and respiratory symptoms in seven year olds. , 1997, The European respiratory journal.

[42]  James F. Gleason,et al.  NO2 columns in the western United States observed from space and simulated by a regional chemistry model and their implications for NOx emissions , 2009 .

[43]  Michael Buchwitz,et al.  The Global Ozone Monitoring Experiment (Gome) : Mission, instrument concept, and first scientific results , 1997 .

[44]  Thomas P. Kurosu,et al.  Global inventory of nitrogen oxide emissions constrained by space‐based observations of NO2 columns , 2003 .

[45]  Robert J. D. Spurr,et al.  Air-mass factor formulation for spectroscopic measurements from satellites: application to formaldeh , 2001 .

[46]  J. Dudhia,et al.  A New Vertical Diffusion Package with an Explicit Treatment of Entrainment Processes , 2006 .

[47]  Pius Lee,et al.  column densities over North American urban cities : The effect of 1 satellite footprint resolution 2 3 4 , 2016 .

[48]  L. Folinsbee.  Human health effects of air pollution. , 1993, Environmental health perspectives.