The MERRA-2 Aerosol Reanalysis, 1980 Onward. Part II: Evaluation and Case Studies

The MERRA-2 Aerosol Reanalysis, 1980 Onward. Part II: Evaluation and Case Studies AbstractThe Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), is NASA’s latest reanalysis for the satellite era (1980 onward) using the Goddard Earth Observing System, version 5 (GEOS-5), Earth system model. MERRA-2 provides several improvements over its predecessor (MERRA-1), including aerosol assimilation for the entire period. MERRA-2 assimilates bias-corrected aerosol optical depth (AOD) from the Moderate Resolution Imaging Spectroradiometer and the Advanced Very High Resolution Radiometer instruments. Additionally, MERRA-2 assimilates (non bias corrected) AOD from the Multiangle Imaging SpectroRadiometer over bright surfaces and AOD from Aerosol Robotic Network sunphotometer stations. This paper, the second of a pair, summarizes the efforts to assess the quality of the MERRA-2 aerosol products. First, MERRA-2 aerosols are evaluated using independent observations. It is shown that the MERRA-2 absorption aerosol optical depth (AAOD) and ultraviolet aerosol index (AI) compare well with Ozone Monitoring Instrument observations. Next, aerosol vertical structure and surface fine particulate matter (PM2.5) are evaluated using available satellite, aircraft, and ground-based observations. While MERRA-2 generally compares well to these observations, the assimilation cannot correct for all deficiencies in the model (e.g., missing emissions). Such deficiencies can explain many of the biases with observations. Finally, a focus is placed on several major aerosol events to illustrate successes and weaknesses of the AOD assimilation: the Mount Pinatubo eruption, a Saharan dust transport episode, the California Rim Fire, and an extreme pollution event over China. The article concludes with a summary that points to best practices for using the MERRA-2 aerosol reanalysis in future studies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Climate American Meteorological Society

The MERRA-2 Aerosol Reanalysis, 1980 Onward. Part II: Evaluation and Case Studies

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American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0442
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1520-0442
D.O.I.
10.1175/JCLI-D-16-0613.1
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Abstract

AbstractThe Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), is NASA’s latest reanalysis for the satellite era (1980 onward) using the Goddard Earth Observing System, version 5 (GEOS-5), Earth system model. MERRA-2 provides several improvements over its predecessor (MERRA-1), including aerosol assimilation for the entire period. MERRA-2 assimilates bias-corrected aerosol optical depth (AOD) from the Moderate Resolution Imaging Spectroradiometer and the Advanced Very High Resolution Radiometer instruments. Additionally, MERRA-2 assimilates (non bias corrected) AOD from the Multiangle Imaging SpectroRadiometer over bright surfaces and AOD from Aerosol Robotic Network sunphotometer stations. This paper, the second of a pair, summarizes the efforts to assess the quality of the MERRA-2 aerosol products. First, MERRA-2 aerosols are evaluated using independent observations. It is shown that the MERRA-2 absorption aerosol optical depth (AAOD) and ultraviolet aerosol index (AI) compare well with Ozone Monitoring Instrument observations. Next, aerosol vertical structure and surface fine particulate matter (PM2.5) are evaluated using available satellite, aircraft, and ground-based observations. While MERRA-2 generally compares well to these observations, the assimilation cannot correct for all deficiencies in the model (e.g., missing emissions). Such deficiencies can explain many of the biases with observations. Finally, a focus is placed on several major aerosol events to illustrate successes and weaknesses of the AOD assimilation: the Mount Pinatubo eruption, a Saharan dust transport episode, the California Rim Fire, and an extreme pollution event over China. The article concludes with a summary that points to best practices for using the MERRA-2 aerosol reanalysis in future studies.

Journal

Journal of Climate – American Meteorological Society

Published: Sep 18, 2017

References

  • Dispersion of the volcanic sulfate cloud from a Mount Pinatubo–like eruption
    Aquila, V.; Oman, L. D.; Stolarski, R. S.; Colarco, P. R.; Newman, P. A.
  • Reevaluation of mineral aerosol radiative forcings suggests a better agreement with satellite and AERONET data
    Balkanski, Y.; Schulz, M.; Claquin, T.; Guibert, S.
  • Aerosol analysis and forecast in the European Centre for Medium-Range Weather Forecasts Integrated Forecast System: 2. Data assimilation
    Benedetti, A.
  • Evaluation of GEOS-5 sulfur dioxide simulations during the Frostburg, MD 2010 field campaign
    Buchard, V.
  • Using the OMI aerosol index and absorption aerosol optical depth to evaluate the NASA MERRA aerosol reanalysis
    Buchard, V.
  • Evaluation of the surface PM2.5 in version 1 of the NASA MERRA aerosol reanalysis over the United States
    Buchard, V.
  • Multi-decadal satellite measurements of global volcanic degassing
    Carn, S. A.; Clarisse, L.; Prata, A. J.
  • The impact of aerosol optical depth assimilation on aerosol forecasts and radiative effects during a wild fire event over the United States
    Chen, D.; Liu, Z.; Schwartz, C.; Lin, H.-C.; Cetola, J.; Gu, Y.; Xue, L.
  • Understanding the long-term variability of African dust transport across the Atlantic as recorded in both Barbados surface concentrations and large-scale Total Ozone Mapping Spectrometer (TOMS) optical thickness
    Chiapello, I.; Moulin, C.; Prospero, J. M.
  • Tropospheric aerosol optical thickness from the GOCART model and comparisons with satellite and sun photometer measurements
    Chin, M.
  • Determining the UV imaginary index of refraction of Saharan dust particles from Total Ozone Mapping Spectrometer data using a three-dimensional model of dust transport
    Colarco, P. R.; Toon, O. B.; Torres, O.; Rasch, P. J.
  • Transport of smoke from Canadian forest fires to the surface near Washington, DC: Injection height, entrainment, and optical properties
    Colarco, P. R.; Schoeberl, M.; Doddridge, B.; Marufu, L.; Torres, O.; Welton, E.
  • Online simulations of global aerosol distributions in the NASA GEOS-4 model and comparisons to satellite and ground-based aerosol optical depth
    Colarco, P. R.; da Silva, A.; Chin, M.; Diehl, T.
  • Impact of radiatively interactive dust aerosols in the NASA GEOS-5 climate model: Sensitivity to dust particle shape and refractive index
    Colarco, P. R.; Nowottnick, E. P.; Randles, C. A.; Yi, B.; Yang, P.; Kim, K.-M.; Smith, J. A.; Bardeen, C. G.
  • An adaptive buddy check for observational quality control
    Dee, D. P.; Rukhovets, L.; Todling, R.; Da Silva, A. M.; Larson, J. W.
  • SCIAMACHY Absorbing Aerosol Index—Calibration issues and global results from 2002–2004
    de Graaf, M.; Stammes, P.
  • Anthropogenic, biomass burning, and volcanic emissions of black carbon, organic carbon, and SO2 from 1980 to 2010 for hindcast model experiments
    Diehl, T.; Heil, A.; Chin, M.; Pan, X.; Streets, D.; Schultz, M.; Kinne, S.
  • Interannual and seasonal variability of biomass burning emissions constrained by satellite observations
    Duncan, B. N.; Martin, R. V.; Staudt, A. C.; Yevich, R.; Logan, J. A.
  • Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models
    Freitas, S. R.
  • The Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2)
    Gelaro, R.
  • Airborne high spectral resolution lidar for profiling aerosol optical properties
    Hair, J. W.
  • Interpreting the ultraviolet aerosol index observed with the OMI satellite instrument to understand absorption by organic aerosols: Implications for atmospheric oxidation and direct radiative effects
    Hammer, M. S.; Martin, R. V.; van Donkelaar, A.; Buchard, V.; Torres, O.; Ridley, D. A.; Spurr, R. J. D.
  • Global distribution of UV-absorbing aerosols from Nimbus 7/TOMS data
    Herman, J.; Bhartia, P.; Torres, O.; Hsu, C.; Seftor, C.; Celarier, E.
  • Optical properties of aerosols and clouds: The software package OPAC
    Hess, M.; Koepke, P.; Schult, I.
  • AERONET—A federated instrument network and data archive for aerosol characterization
    Holben, B.
  • Comparisons of the TOMS aerosol index with sun-photometer aerosol optical thickness: Results and applications
    Hsu, N. C.
  • The heaviest particulate air-pollution episodes occurred in northern China in January, 2013: Insights gained from observation
    Ji, D.
  • An AeroCom initial assessment—Optical properties in aerosol component modules of global models
    Kinne, S.
  • Introduction of the GSI into the NCEP Global Data Assimilation System
    Kleist, D. T.; Parrish, D. F.; Derber, J. C.; Treadon, R.; Wu, W.-S.; Lord, S.
  • Science objectives of the Ozone Monitoring Instrument
    Levelt, P. F.; Hilsenrath, E.; Leppelmeier, G. W.; van den Oord, G. H.; Bhartia, P. K.; Tamminen, J.; de Haan, J. F.; Veefkind, J. P.
  • A three-dimensional variational data assimilation system for multiple aerosol species with WRF-Chem and an application to PM2.5 prediction
    Li, Z.; Zang, Z.; Li, Q. B.; Chao, Y.; Chen, D.; Ye, Z.; Liu, Y.; Liou, K. N.
  • An 11-year global gridded aerosol optical thickness reanalysis (v1.0) for atmospheric and climate sciences
    Lynch, P.
  • Atmospheric iron deposition: Global distribution, variability, and human perturbations
    Mahowald, N. M.
  • Spatial and seasonal trends in particle concentration and optical extinction in the United States
    Malm, W. C.; Sisler, J. F.; Huffman, D.; Eldred, R. A.; Cahill, T. A.
  • Uncertainties in PM2.5 gravimetric and speciation measurements and what we can learn from them
    Malm, W. C.; Schichtel, B. A.; Pitchford, M. L.
  • Development and implementation of a remote-sensing and in situ data-assimilating version of CMAQ for operational PM2.5 forecasting. Part 1: MODIS aerosol optical depth (AOD) data-assimilation design and testing
    McHenry, J. N.; Vukovich, J. M.; Hsu, N. C.
  • Single-scattering properties of tri-axial ellipsoidal mineral dust aerosols: A database for application to radiative transfer calculations
    Meng, Z.; Yang, P.; Kattawar, G. W.; Bi, L.; Liou, K. N.; Laszlo, I.
  • CLAES observations of Mt. Pinatubo stratospheric aerosol
    Mergenthaler, J.; Kumer, J.; Roche, A.
  • Development of the GEOS-5 atmospheric general circulation model: Evolution from MERRA to MERRA-2
    Molod, A. M.; Takas, L. L.; Suarez, M.; Bacmeister, J.
  • Use of the CALIOP vertical feature mask for evaluating global aerosol models
    Nowottnick, E. P.; Colarco, P. R.; Welton, E. J.; da Silva, A.
  • Atmospheric dust modeling from meso to global scales with the online NMMB/BSC-Dust model—Part 1: Model description, annual simulations and evaluation
    Pérez, C.
  • The 2013 Rim Fire: Implications for predicting extreme fire spread, pyroconvection, and smoke emissions
    Peterson, D. A.; Hyer, E. J.; Campbell, J. R.; Fromm, M. D.; Hair, J. W.; Butler, C. F.; Fenn, M. A.
  • Air pollution and life expectancy in China and beyond
    Pope, C. A.; Dockery, D. W.
  • Fine-particulate air pollution and life expectancy in the United States
    Pope, C. A.; Ezzati, M.; Dockery, D. W.
  • Impact of the North African drought and El Niño on mineral dust in the Barbados trade winds
    Prospero, J. M.; Nees, R. T.
  • African droughts and dust transport to the Caribbean: Climate change implications
    Prospero, J. M.; Lamb, P. J.
  • African dust deposition to Florida: Temporal and spatial variability and comparisons to models
    Prospero, J. M.; Landing, W. M.; Schulz, M.
  • The impact of boreal forest fire on climate warming
    Randerson, J. T.
  • The MERRA-2 aerosol reanalysis, 1980 onward, Part I: System description and data assimilation evaluation
    Randles, C. A.
  • MERRA: NASA’s Modern-Era Retrospective Analysis for Research and Applications
    Rienecker, M. M.
  • Development of the Ensemble Navy Aerosol Analysis Prediction System (ENAAPS) and its application of the Data Assimilation Research Testbed (DART) in support of aerosol forecasting
    Rubin, J. I.
  • Assimilation of next generation geostationary aerosol optical depth retrievals to improve air quality simulations
    Saide, P. E.; Kim, J.; Song, C. H.; Choi, M.; Cheng, Y.; Carmichael, G. R.
  • Assimilating aerosol observations with a “hybrid” variational-ensemble data assimilation system
    Schwartz, C. S.; Liu, Z.; Lin, H.-C.; Cetola, J. D.
  • Data assimilation of CALIPSO aerosol observations
    Sekiyama, T.; Tanaka, T.; Shimizu, A.; Miyoshi, T.
  • VLIDORT: A linearized pseudo-spherical vector discrete ordinate radiative transfer code for forward model and retrieval studies in multilayer multiple scattering media
    Spurr, R.
  • Investigation of the sources and evolution processes of severe haze pollution in Beijing in January 2013
    Sun, Y.; Jiang, Q.; Wang, Z.; Fu, P.; Li, J.; Yang, T.; Yin, Y.
  • Evaluating the importance of atmospheric and sedimentary iron sources to Southern Ocean biogeochemistry
    Tagliabue, A.; Bopp, L.; Aumont, O.
  • MASINGAR, a global tropospheric aerosol chemical transport model coupled with MRI/JMA98 GCM: Model description
    Tanaka, T. Y.; Orito, K.; Sekiyama, T. T.; Shibata, K.; Chiba, M.; Tanaka, H.
  • Analysis and quantification of the diversities of aerosol life cycles within AeroCom
    Textor, C.
  • Derivation of aerosol properties from satellite measurements of backscattered ultraviolet radiation: Theoretical basis
    Torres, O.; Bhartia, P.; Herman, J.; Ahmad, Z.; Gleason, J.
  • Aerosols and surface UV products from Ozone Monitoring Instrument observations: An overview
    Torres, O.; Tanskanen, A.; Veihelmann, B.; Ahn, C.; Braak, R.; Bhartia, P. K.; Veefkind, P.; Levelt, P.
  • Improvements to the OMI near-UV aerosol algorithm using A-Train CALIOP and AIRS observations
    Torres, O.; Ahn, C.; Chen, Z.
  • Interannual variability in global biomass burning emissions from 1997 to 2004
    van der Werf, G. R.; Randerson, J. T.; Giglio, L.; Collatz, G. J.; Kasibhatla, P. S.; Arellano, A. F.
  • Global estimates of ambient fine particulate matter concentrations from satellite-based aerosol optical depth: Development and application
    van Donkelaar, A.; Martin, R. V.; Brauer, M.; Kahn, R.; Levy, R.; Verduzco, C.; Villeneuve, P. J.
  • Initial performance assessment of CALIOP
    Winker, D. M.; Hunt, W. H.; McGill, M. J.
  • Overview of the CALIPSO mission and CALIOP data processing algorithms
    Winker, D. M.; Vaughan, M. A.; Omar, A.; Hu, Y.; Powell, K. A.; Liu, Z.; Hunt, W. H.; Young, S. A.
  • Three-dimensional variational analysis with spatially inhomogeneous covariances
    Wu, W.-S.; Purser, R. J.; Parrish, D. F.
  • Satellite perspective of aerosol intercontinental transport: From qualitative tracking to quantitative characterization
    Yu, H.; Remer, L. A.; Kahn, R. A.; Chin, M.; Zhang, Y.
  • A system for operational aerosol optical depth data assimilation over global oceans
    Zhang, J.; Reid, J. S.; Westphal, D. L.; Baker, N. L.; Hyer, E. J.
  • Heterogeneous chemistry: A mechanism missing in current models to explain secondary inorganic aerosol formation during the January 2013 haze episode in north China
    Zheng, B.
  • Airborne observations of bioaerosol over the southeast United States using a Wideband Integrated Bioaerosol Sensor (WIBS-4A)
    Ziemba, L. D.

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