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Using the Linearized Observation Operator to Calculate Observation Space Ensemble Perturbations in Ensemble Filters
  • Published Date:
    2018
  • Source:
    Journal of Advances in Modeling Earth Systems, 10(7), 1414-1420.
Filetype[PDF-841.09 KB]


Details:
  • Personal Author:
  • Description:
    Within the National Oceanic and Atmospheric Administration National Weather Service, the hybrid ensemble-variational system (Gridpoint Statistical Interpolation, GSI) is run together with the 80-member ensemble square root filter (EnSRF) operationally for the global forecast data assimilation system. EnSRF uses observation operator from GSI: current operational configuration requires 81 runs of GSI in the observation operator mode to run EnSRF (for each of the 80 ensemble members and for the ensemble mean). To reduce data assimilation cycle computation time, a GSI-EnSRF configuration that requires a single run of the GSI system in the observation operator mode was developed. In this configuration EnSRF uses full observation operator for the ensemble mean and linearized observation operator for the ensemble perturbations. Comparison of the two approaches shows that using linearized observation operator for ensemble perturbations compared to using full observation operator does not change the analysis results significantly and allows to reduce overall data assimilation cycle computation time.

  • DOI:
    http://dx.doi.org/10.1029/2018ms001309
  • Document Type:
    Journal Article
  • Collection(s):
    Office of Oceanic and Atmospheric Research (OAR)
    NOAA Cooperative Institutes
  • Main Document Checksum:
  • Supporting Files:
    No Additional Files
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    5. Ocean Warming FROM THE SURFACE TO THE DEEP IN OBSERVATIONS AND MODELS
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      Description:
      The ocean is the primary heat sink of the global climate system. Since 1971, it has been responsible for storing more than 90% of the excess heat added to the Earth system by anthropogenic greenhouse-gas emissions. Adding this heat to the ocean contr...
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      Description:
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      Description:
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    9. Estimation of Rain Rate from Airborne Doppler W-Band Radar in CalWater-2
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      2018
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      Journal of Atmospheric and Oceanic Technology, 35(3), 593-608.
      Description:
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    10. Emissions of nitrogen-containing organic compounds from the burning of herbaceous and arboraceous biomass: Fuel composition dependence and the variability of commonly used nitrile tracers
      Personal Author:
      Coggon, M. M.; Veres, P. R.; Yuan, B.; Koss, A.; Warneke, C.; Gilman, J. B.; Lerner, B. M.; Peischl, J.; Aikin, K. C.; Stockwell, C. E.; Hatch, L. E.; Ryerson, T. B.; Roberts, J. M.; Yokelson, R. J.; de Gouw, J. A.;
      Published Date:
      2016
      Source:
      Geophysical Research Letters, 43(18), 9903-9912.
      Description:
      Volatile organic compounds (VOCs) emitted from residential wood and crop residue burning were measured in Colorado, U.S. When compared to the emissions from crop burning, residential wood burning exhibited markedly lower concentrations of acetonitril...
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    11. High-resolution inversion of methane emissions in the Southeast US using SEAC(4)RS aircraft observations of atmospheric methane: anthropogenic and wetland sources
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      Sheng, J. X.; Jacob, D. J.; Turner, A. J.; Maasakkers, J. D.; Sulprizio, M. P.; Bloom, A. A.; Andrews, A. E.; Wunch, D.;
      Published Date:
      2018
      Source:
      Atmospheric Chemistry and Physics, 18(9), 6483-6491.
      Description:
      We use observations of boundary layer methane from the SEAC(4)RS aircraft campaign over the Southeast US in August-September 2013 to estimate methane emissions in that region through an inverse analysis with up to 0.25 degrees x 0.3125 degrees (25 x ...
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    12. Ultraviolet radiation modelling from ground-based and satellite measurements on Reunion Island, southern tropics
      Personal Author:
      Lamy, K.; Portafaix, T.; Brogniez, C.; Godin-Beekmann, S.; Bencherif, H.; Morel, B.; Pazmino, A.; Metzger, J. M.; Auriol, F.; Deroo, C.; Duflot, V.; Goloub, P.; Long, C. N.;
      Published Date:
      2018
      Source:
      Atmospheric Chemistry and Physics, 18(1), 227-246.
      Description:
      Surface ultraviolet radiation (SUR) is not an increasing concern after the implementation of the Montreal Protocol and the recovery of the ozone layer (Morgenstern et al., 2008). However, large uncertainties remain in the prediction of future changes...
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    13. The influence of local oil exploration and regional wildfires on summer 2015 aerosol over the North Slope of Alaska
      Personal Author:
      Creamean, J. M.; Maahn, M.; de Boer, G.; McComiskey, A.; Sedlacek, A. J.; Feng, Y.;
      Published Date:
      2018
      Source:
      Atmospheric Chemistry and Physics, 18(2), 555-570.
      Description:
      The Arctic is warming at an alarming rate, yet the processes that contribute to the enhanced warming are not well understood. Arctic aerosols have been targeted in studies for decades due to their consequential impacts on the energy budget, both dire...
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    14. Equatorial Waves and the Skill of NCEP and ECMWF Numerical Weather Prediction Systems
      Personal Author:
      Dias, J.; Gehne, M.; Kiladis, G. N.; Sakaeda, N.; Bechtold, P.; Haiden, T.;
      Published Date:
      2018
      Source:
      Monthly Weather Review, 146(6), 1763-1784.
      Description:
      Despite decades of research on the role of moist convective processes in large-scale tropical dynamics, tropical forecast skill in operational models is still deficient when compared to the extratropics, even at short lead times. Here we compare trop...
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    15. Widespread Reemergence of Sea Surface Temperature Anomalies in the Global Oceans, Including Tropical Regions Forced by Reemerging Winds
      Personal Author:
      Byju, P.; Dommenget, D.; Alexander, M. A.;
      Published Date:
      2018
      Source:
      Geophysical Research Letters, 45(15), 7683-7691.
      Description:
      Sea surface temperature anomalies (SSTA) in portions of the extratropics are known to recur from one winter to the next without persisting through the intervening summer. Previous studies identified only a limited number of midlatitude regions where ...
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    16. Non-methane organic gas emissions from biomass burning: identification, quantification, and emission factors from PTR-ToF during the FIREX 2016 laboratory experiment
      Personal Author:
      Koss, A. R.; Sekimoto, K.; Gilman, J. B.; Selimovic, V.; Coggon, M. M.; Zarzana, K. J.; Yuan, B.; Lerner, B. M.; Brown, S. S.; Jimenez, J. L.; Krechmer, J.; Roberts, J. M.; Warneke, C.; Yokelson, R. J.; de Gouw, J.;
      Published Date:
      2018
      Source:
      Atmospheric Chemistry and Physics, 18(5), 3299-3319.
      Description:
      Volatile and intermediate-volatility non-methane organic gases (NMOGs) released from biomass burning were measured during laboratory-simulated wildfires by protontransfer-reaction time-of-flight mass spectrometry (PTRToF). We identified NMOG contribu...
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    17. An evaluation of three methods for measuring black carbon in Alert, Canada
      Personal Author:
      Sharma, S.; Leaitch, W. R.; Huang, L.; Veber, D.; Kolonjari, F.; Zhang, W.; Hanna, S. J.; Bertram, A. K.; Ogren, J. A.;
      Published Date:
      2017
      Source:
      Atmospheric Chemistry and Physics, 17(24), 15225-15243.
      Description:
      Absorption of sunlight by black carbon (BC) warms the atmosphere, which may be important for Arctic climate. The measurement of BC is complicated by the lack of a simple definition of BC and the absence of techniques that are uniquely sensitive to BC...
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      Nakamura, R.; Varsani, A.; Genestreti, K. J.; Le Contel, O.; Nakamura, T.; Baumjohann, W.; Nagai, T.; Artemyev, A.; Birn, J.; Sergeev, V. A.; Apatenkov, S.; Ergun, R. E.; Fuselier, S. A.; Gershman, D. J.; Giles, B. J.; Khotyaintsev, Y. V.; Lindqvist, P. A.; Magnes, W.; Mauk, B.; Petrukovich, A.; Russell, C. T.; Stawarz, J.; Strangeway, R. J.; Anderson, B.; Burch, J. L.; Bromund, K. R.; Cohen, I.; Fischer, D.; Jaynes, A.; Kepko, L.; Le, G.; Plaschke, F.; Reeves, G.; Singer, H. J.; Slavin, J. A.; Torbert, R. B.; Turner, D. L.;
      Published Date:
      2018
      Source:
      Journal of Geophysical Research-Space Physics, 123(2), 1260-1278.
      Description:
      We present characteristics of current layers in the off-equatorial near-Earth plasma sheet boundary observed with high time-resolution measurements from the Magnetospheric Multiscale mission during an intense substorm associated with multiple dipolar...
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    19. Understanding isoprene photooxidation using observations and modeling over a subtropical forest in the southeastern US
      Personal Author:
      Su, L. P.; Patton, E. G.; de Arellano, J. V. G.; Guenther, A. B.; Kaser, L.; Yuan, B.; Xiong, F. L. Z.; Shepson, P. B.; Zhang, L.; Miller, D. O.; Brune, W. H.; Baumann, K.; Edgerton, E.; Weinheimer, A.; Misztal, P. K.; Park, J. H.; Goldstein, A. H.; Skog, K. M.; Keutsch, F. N.; Mak, J. E.;
      Published Date:
      2016
      Source:
      Atmospheric Chemistry and Physics, 16(12), 7725-7741.
      Description:
      The emission, dispersion, and photochemistry of isoprene (C5H8) and related chemical species in the convective boundary layer (CBL) during sunlit daytime were studied over a mixed forest in the southeastern United States by combining ground-based and...
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      Elvidge, E. L.; Bonisch, H.; Brenninkmeijer, C. A. M.; Engel, A.; Fraser, P. J.; Gallacher, E.; Langenfelds, R.; Muhle, J.; Oram, D. E.; Ray, E. A.; Ridley, A. R.; Rockmann, T.; Sturges, W. T.; Weiss, R. F.; Laube, J. C.;
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      2018
      Source:
      Atmospheric Chemistry and Physics, 18(5), 3369-3385.
      Description:
      In a changing climate, potential stratospheric circulation changes require long-term monitoring. Stratospheric trace gas measurements are often used as a proxy for stratospheric circulation changes via the "mean age of air" values derived from them. ...
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