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Examining moisture pathways and extreme precipitation in the US Intermountain West using self-organizing maps
  • Published Date:
    2016
  • Source:
    Geophysical Research Letters, 43(4), 1727-1735.
Filetype[PDF-7.05 MB]


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Examining moisture pathways and extreme precipitation in the US Intermountain West using self-organizing maps
Details:
  • Personal Author:
  • Description:
    Self-organizing maps (SOMs) were used to explore relationships between large-scale synoptic conditions, especially vertically integrated water vapor transport (IVT), and extreme precipitation events in the U.S. Intermountain West (IMW). By examining spatial patterns in the IVT, pathways are identified where moisture can penetrate into the IMW. A substantial number of extreme precipitation events in the IMW are associated with infrequently occurring synoptic patterns. The transition frequency between each of the SOM nodes, which indicate temporal relationships between the patterns, identified two synoptic settings associated with extreme precipitation in the IMW: (1) a landfalling, zonally propagating trough that results in a concentrated IVT band that moves southward as the system moves inland and (2) a southwesterly storm track associated with strong ridging over the coast that results in persistent IVT transport into the Pacific Northwest that can last for several days.
  • Document Type:
    Journal Article
  • Collection(s):
    NOAA Cooperative Institutes
    Office of Oceanic and Atmospheric Research (OAR)
  • Main Document Checksum:
    1. Toward autonomous surface-based infrared remote sensing of polar clouds: cloud-height retrievals
      Personal Author:
      Rowe, P. M.; Cox, C. J.; Walden, V.;
      Published Date:
      2016
      Source:
      Atmospheric Measurement Techniques, 9(8), 3641-3659.
      Description:
      Polar regions are characterized by their remoteness, making measurements challenging, but an improved knowledge of clouds and radiation is necessary to understand polar climate change. Infrared radiance spectrometers can operate continuously from the...
      File Type:
      Filetype[PDF - 796.95 KB]
    2. Understanding the Role of Atmospheric Rivers in Heavy Precipitation in the Southeast United States
      Personal Author:
      Mahoney, K.; Jackson, D. L.; Neiman, P.; Hughes, M.; Darby, L.; Wick, G.; White, A.; Sukovich, E.; Cifelli, R.;
      Published Date:
      2016
      Source:
      Monthly Weather Review, 144(4), 1617-1632.
      Description:
      An analysis of atmospheric rivers (ARs) as defined by an automated AR detection tool based on integrated water vapor transport (IVT) and the connection to heavy precipitation in the southeast United States (SEUS) is performed. Climatological water va...
      File Type:
      Filetype[PDF - 2.36 MB]
    3. The Role of Springtime Arctic Clouds in Determining Autumn Sea Ice Extent
      Personal Author:
      Cox, C. J.; Uttal, T.; Long, C. N.; Shupe, M. D.; Stone, R. S.; Starkweather, S.;
      Published Date:
      2016
      Source:
      Journal of Climate, 29(18), 6581-6596.
      Description:
      Recent studies suggest that the atmosphere conditions arctic sea ice properties in spring in a way that may be an important factor in predetermining autumn sea ice concentrations. Here, the role of clouds in this system is analyzed using surface-base...
      File Type:
      Filetype[PDF - 2.18 MB]
    4. Pathways to the Production of Precipitating Hydrometeors and Tropical Cyclone Development
      Personal Author:
      Bao, J. W.; Michelson, S. A.; Grell, E. D.;
      Published Date:
      2016
      Source:
      Monthly Weather Review, 144(6), 2395-2420.
      Description:
      Pathways to the production of precipitation in two cloud microphysics schemes available in the Weather Research and Forecasting (WRF) Model are investigated in a scenario of tropical cyclone intensification. Comparisons of the results from the WRF Mo...
      File Type:
      Filetype[PDF - 4.10 MB]
    5. On the climate impacts of atolls in the central equatorial Pacific
      Personal Author:
      Karnauskas, K. B.; Johnson, G. C.; Murtugudde, R.;
      Published Date:
      2017
      Source:
      International Journal of Climatology, 37(1), 197-203.
      File Type:
      Filetype[PDF - 5.86 MB]
    6. Modifications to the Rapid Update Cycle Land Surface Model (RUC LSM) Available in the Weather Research and Forecasting (WRF) Model
      Personal Author:
      Smirnova, T. G.; Brown, J. M.; Benjamin, S. G.; Kenyon, J. S.;
      Published Date:
      2016
      Source:
      Monthly Weather Review, 144(5), 1851-1865.
      Description:
      The land surface model (LSM) described in this manuscript was originally developed as part of the NOAA Rapid Update Cycle (RUC) model development effort; with ongoing modifications, it is now used as an option for the WRF community model. The RUC mod...
      File Type:
      Filetype[PDF - 5.07 MB]
    7. What caused the recent "Warm Arctic, Cold Continents" trend pattern in winter temperatures?
      Personal Author:
      Sun, L.; Perlwitz, J.; Hoerling, M.;
      Published Date:
      2016
      Source:
      Geophysical Research Letters, 43(10), 5345-5352.
      Description:
      The emergence of rapid Arctic warming in recent decades has coincided with unusually cold winters over Northern Hemisphere continents. It has been speculated that this "Warm Arctic, Cold Continents" trend pattern is due to sea ice loss. Here we use m...
      File Type:
      Filetype[PDF - 2.72 MB]
    8. Future cost-competitive electricity systems and their impact on US CO2 emissions
      Personal Author:
      MacDonald, A. E.; Clack, C. T. M.; Alexander, A.; Dunbar, A.; Wilczak, J.; Xie, Y. F.;
      Published Date:
      2016
      Source:
      Nature Climate Change, 6(5), 526-531.
      Description:
      Carbon dioxide emissions from electricity generation are a major cause of anthropogenic climate change. The deployment of wind and solar power reduces these emissions, but is subject to the variability of the weather. In the present study, we calcula...
      File Type:
      Filetype[PDF - 1.82 MB]
    9. The Climate Change Web Portal: A System to Access and Display Climate and Earth System Model Output from the CMIP5 Archive
      Personal Author:
      Scott, J. D.; Alexander, M. A.; Murray, D. R.; Swales, D.; Eischeid, J.;
      Published Date:
      2016
      Source:
      Bulletin of the American Meteorological Society, 97(4), 523-530.
      File Type:
      Filetype[PDF - 3.44 MB]
    10. Tropical Upper-Tropospheric Potential Vorticity Intrusions during Sudden Stratospheric Warmings
      Personal Author:
      Albers, J. R.; Kiladis, G. N.; Birner, T.; Dias, J.;
      Published Date:
      2016
      Source:
      Journal of the Atmospheric Sciences, 73(6), 2361-2384.
      Description:
      The intrusion of lower-stratospheric extratropical potential vorticity into the tropical upper troposphere in the weeks surrounding the occurrence of sudden stratospheric warmings (SSWs) is examined. The analysis reveals that SSW-related PV intrusion...
      File Type:
      Filetype[PDF - 13.73 MB]
    11. Anomalous mid-twentieth century atmospheric circulation change over the South Atlantic compared to the last 6000 years
      Personal Author:
      Turney, C. S. M.; Jones, R. T.; Lister, D.; Jones, P.; Williams, A. N.; Hogg, A.; Thomas, Z. A.; Compo, G. P.; Yin, X. G.; Fogwill, C. J.; Palmer, J.; Colwell, S.; Allan, R.; Visbeck, M.;
      Published Date:
      2016
      Source:
      Environmental Research Letters, 11(6), 064009.
      Description:
      Determining the timing and impact of anthropogenic climate change in data-sparse regions is a considerable challenge. Arguably, nowhere is this more difficult than the Antarctic Peninsula and the subantarctic South Atlantic where observational record...
      File Type:
      Filetype[PDF - 2.73 MB]
    12. Rapid Mesoscale Environmental Changes Accompanying Genesis of an Unusual Tornado
      Personal Author:
      Koch, S. E.; Ware, R.; Jiang, H. L.; Xie, Y. F.;
      Published Date:
      2016
      Source:
      Weather and Forecasting, 31(3), 763-786.
      Description:
      This study documents a very rapid increase in convective instability, vertical wind shear, and mesoscale forcing for ascent leading to the formation of a highly unusual tornado as detected by a ground-based microwave radiometer and wind profiler, and...
      File Type:
      Filetype[PDF - 7.58 MB]
    13. Impacts of Interactive Stratospheric Chemistry on Antarctic and Southern Ocean Climate Change in the Goddard Earth Observing System, Version 5 (GEOS-5)
      Personal Author:
      Li, F.; Vikhliaev, Y. V.; Newman, P. A.; Pawson, S.; Perlwitz, J.; Waugh, D. W.; Douglass, A. R.;
      Published Date:
      2016
      Source:
      Journal of Climate, 29(9), 3199-3218.
      Description:
      Stratospheric ozone depletion plays a major role in driving climate change in the Southern Hemisphere. To date, many climate models prescribe the stratospheric ozone layer's evolution using monthly and zonally averaged ozone fields. However, the pres...
      File Type:
      Filetype[PDF - 2.98 MB]
    14. Characterizing Recent Trends in U.S. Heavy Precipitation
      Personal Author:
      Hoerling, M.; Eischeid, J.; Perlwitz, J.; Quan, X. W.; Wolter, K.; Cheng, L. Y.;
      Published Date:
      2016
      Source:
      Journal of Climate, 29(7), 2313-2332.
      Description:
      Time series of U.S. daily heavy precipitation (95th percentile) are analyzed to determine factors responsible for regionality and seasonality in their 1979-2013 trends. For annual conditions, contiguous U.S. trends have been characterized by increase...
      File Type:
      Filetype[PDF - 9.93 MB]
    15. Inaccuracies with Multimodel Postprocessing Methods Involving Weighted, Regression-Corrected Forecasts
      Personal Author:
      Hodyss, D.; Satterfield, E.; McLay, J.; Hamill, T. M.; Scheuerer, M.;
      Published Date:
      2016
      Source:
      Monthly Weather Review, 144(4), 1649-1668.
      Description:
      Ensemble postprocessing is frequently applied to correct biases and deficiencies in the spread of ensemble forecasts. Methods involving weighted, regression-corrected forecasts address the typical biases and under-dispersion of ensembles through a re...
      File Type:
      Filetype[PDF - 1.90 MB]
    16. The Sensitivity of Hurricane Irene to Aerosols and Ocean Coupling: Simulations with WRF Spectral Bin Microphysics
      Personal Author:
      Lynn, B. H.; Khain, A. P.; Bao, J. W.; Michelson, S. A.; Yuan, T.; Kelman, G.; Rosenfeld, D.; Shpund, J.; Benmoshe, N.;
      Published Date:
      2016
      Source:
      Journal of the Atmospheric Sciences, 73(2), 467-486.
      Description:
      Hurricane Irene (2011) moved northward along the eastern coast of the United States and was expected to cause severe wind and flood damage. However, the hurricane weakened much faster than was predicted. Moreover, the minimum pressure in Irene occurr...
      File Type:
      Filetype[PDF - 4.12 MB]
    17. Reflectivity and Liquid Water Content Vertical Decomposition Diagrams to Diagnose Vertical Evolution of Raindrop Size Distributions
      Personal Author:
      Williams, C. R.
      Published Date:
      2016
      Source:
      Journal of Atmospheric and Oceanic Technology, 33(3), 579-595.
      Description:
      This study consists of two parts. The first part describes the way in which vertical air motions and raindrop size distributions (DSDs) were retrieved from 449-MHz and 2.835-GHz (UHF and S band) vertically pointing radars (VPRs) deployed side by side...
      File Type:
      Filetype[PDF - 3.16 MB]
    18. The Physics of Drought in the US Central Great Plains
      Personal Author:
      Livneh, B.; Hoerling, M. P.;
      Published Date:
      2016
      Source:
      Journal of Climate, 29(18), 6783-6804.
      Description:
      The semiarid U.S. Great Plains is prone to severe droughts having major consequences for agricultural production, livestock health, and river navigation. The recent 2012 event was accompanied by record deficits in precipitation and high temperatures ...
      File Type:
      Filetype[PDF - 2.75 MB]
    19. The Radiative Forcing Model Intercomparison Project (RFMIP): experimental protocol for CMIP6
      Personal Author:
      Pincus, R.; Forster, P. M.; Stevens, B.;
      Published Date:
      2016
      Source:
      Geoscientific Model Development, 9(9), 3447-3460.
      Description:
      The phrasing of the first of three questions motivating CMIP6 - "How does the Earth system respond to forcing?" - suggests that forcing is always well-known, yet the radiative forcing to which this question refers has historically been uncertain in c...
      File Type:
      Filetype[PDF - 158.64 KB]
    20. Forced Atmospheric Teleconnections during 1979-2014
      Personal Author:
      Zhang, T.; Hoerling, M. P.; Perlwitz, J.; Xu, T. Y.;
      Published Date:
      2016
      Source:
      Journal of Climate, 29(7), 2333-2357.
      Description:
      Forced atmospheric teleconnections during 1979-2014 are examined using a 50-member ensemble of atmospheric general circulation model (AGCM) simulations subjected to observed variations in sea surface temperatures (SSTs), sea ice, and carbon dioxide. ...
      File Type:
      Filetype[PDF - 7.76 MB]
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