Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
i

Superseded

This Document Has Been Replaced By:

i

Retired

This Document Has Been Retired

i

Up-to-date Information

This is the latest update:

Clutter mitigation, multiple peaks, and high-order spectral moments in 35 GHz vertically pointing radar velocity spectra
  • Published Date:

    2018

  • Source:
    Atmospheric Measurement Techniques, 11(9), 4963-4980.
Filetype[PDF-1.53 MB]


Details:
  • Personal Author:
  • Description:
    This study presents and applies three separate processing methods to improve high-order moments estimated from 35 GHz (Ka band) vertically pointing radar Doppler velocity spectra. The first processing method removes Doppler-shifted ground clutter from spectra collected by a US Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) program Ka-band zenith pointing radar (KAZR) deployed at Oliktok Point (OLI), Alaska. Ground clutter resulted from multiple pathways through antenna side lobes and reflections off a rotating scanning radar antenna located 2m away from KAZR, which caused Doppler shifts in ground clutter returns from stationary targets 2.5 km away. After removing clutter in the recorded velocity spectra, the second processing method identifies multiple separate and sub-peaks in the spectra and estimates high-order moments for each peak. Multiple peaks and high-order moments were estimated for both original 2 and 15 s averaged spectra. The third processing step improves the spectrum variance, skewness, and kurtosis estimates by removing velocity variability due to turbulent broadening during 15 s averaging intervals. Applying the multiple peak processing to Doppler velocity spectra during liquid-only clouds can identify cloud and drizzle particles and during mixed-phase clouds can identify liquid cloud and frozen hydrometeors. Consistent with previous studies, this work found that spectrum skewness assuming only a single spectral peak was a good indicator of two hydrometeor populations (for example, cloud and drizzle particles) being present in the radar pulse volume. Yet, after dividing the spectrum into multiple peaks, velocity spectrum skewness for individual peaks is near zero, indicating nearly symmetric peaks. This suggests that future studies should use velocity skewness of single-peak spectra as an indicator of possible multiple hydrometeor populations and then use multiple-peak moments for quantitative studies. Three future activities will continue this work. First, KAZR spectra from several ARM sites have been processed and are available in the ARM archive as a principal investigator (PI) product. ARM programmers are evaluating these processing methods as part of future multiple-peak products generated by ARM. Third, MATLAB code generating the Oliktok Point products has been uploaded as supplemental material for public dissemination.
  • DOI:
    http://dx.doi.org/10.5194/amt-11-4963-2018
  • Document Type:
    Journal Article
  • Collection(s):
    NOAA Cooperative Institutes
    Office of Oceanic and Atmospheric Research (OAR)
  • Main Document Checksum:
  • File Type:
  • Supporting Files:
    No Additional Files
    1. Filetype[PDF - 8.33 MB]
      Personal Author:
      Wells, K. C.; Millet, D. B.; Bousserez, N.; Henze, D. K.; Griffis, T. J.; Chaliyakunnel, S.; Dlugokencky, E. J.; Saikawa, E.; Xiang, G.; Prinn, R. G.; O'Doherty, S.; Young, D.; Weiss, R. F.; Dutton, G. S.; Elkins, J. W.; Krummel, P. B.; Langenfelds, R.; Steele, L. P.;
      Published Date:
      2018
      Source:
      Atmospheric Chemistry and Physics, 18(2), 735-756.
      Description:
      We present top-down constraints on global monthly N2O emissions for 2011 from a multi-inversion approach and an ensemble of surface observations. The inversions employ the GEOS-Chem adjoint and an array of aggregation strategies to test how well curr...
      File Type:
      Filetype[PDF - 8.33 MB]
    2. Filetype[PDF - 1.87 MB]
      Personal Author:
      Raczka, B.; Biraud, S. C.; Ehleringer, J. R.; Lai, C. T.; Miller, J. B.; Pataki, D. E.; Saleska, S. R.; Torn, M. S.; Vaughn, B. H.; Wehr, R.; Bowling, D. R.;
      Published Date:
      2017
      Source:
      Journal of Geophysical Research-Biogeosciences, 122(8), 1969-1987.
      Description:
      The seasonal pattern of the carbon isotope content (delta C-13) of atmospheric CO2 depends on local and nonlocal land-atmosphere exchange and atmospheric transport. Previous studies suggested that the delta C-13 of the net land-atmosphere CO2 flux (d...
      File Type:
      Filetype[PDF - 1.87 MB]
    3. Filetype[PDF - 11.77 MB]
      Personal Author:
      Dieng, D.; Laux, P.; Smiatek, G.; Heinzeller, D.; Bliefernicht, J.; Sarr, A.; Gaye, A. T.; Kunstmann, H.;
      Published Date:
      2018
      Source:
      Journal of Geophysical Research-Atmospheres, 123(15), 7950-7973.
      Description:
      In this study, we analyze a set of agroclimatological indices across West Africa and assess their projected changes for the future. We apply the regional climate model CCLM (COnsortium for Small-scale MOdelling in CLimate Mode) with a high spatial re...
      File Type:
      Filetype[PDF - 11.77 MB]
    4. Filetype[PDF - 1.74 MB]
      Personal Author:
      Kenagy, H. S.; Sparks, T. L.; Ebben, C. J.; Wooldrige, P. J.; Lopez-Hilfiker, F. D.; Lee, B. H.; Thornton, J. A.; McDuffie, E. E.; Fibiger, D. L.; Brown, S. S.; Montzka, D. D.; Weinheimer, A. J.; Schroder, J. C.; Campuzano-Jost, P.; Day, D. A.; Jimenez, J. L.; Dibb, J. E.; Campos, T.; Shah, V.; Jaegle, L.; Cohen, R. C.;
      Published Date:
      2018
      Source:
      Journal of Geophysical Research-Atmospheres, 123(17), 9813-9827.
      Description:
      Although urban NOx lifetimes have been examined extensively during summertime conditions, wintertime NOx chemistry has been comparatively less studied. We use measurements of NOx and its oxidation products from the aircraft-based WINTER (Wintertime I...
      File Type:
      Filetype[PDF - 1.74 MB]
    5. Filetype[PDF - 3.46 MB]
      Personal Author:
      Jarvinen, E.; Ignatius, K.; Nichman, L.; Kristensen, T. B.; Fuchs, C.; Hoyle, C. R.; Hoppel, N.; Corbin, J. C.; Craven, J.; Duplissy, J.; Ehrhart, S.; El Haddad, I.; Frege, C.; Gordon, H.; Jokinen, T.; Kallinger, P.; Kirkby, J.; Kiselev, A.; Naumann, K. H.; Petaja, T.; Pinterich, T.; Prevot, A. S. H.; Saathoff, H.; Schiebel, T.; Sengupta, K.; Simon, M.; Slowik, J. G.; Trostl, J.; Virtanen, A.; Vochezer, P.; Vogt, S.; Wagner, A. C.; Wagner, R.; Williamson, C.; Winkler, P. M.; Yan, C.; Baltensperger, U.; Donahue, N. M.; Flagan, R. C.; Gallagher, M.; Hansel, A.; Kulmala, M.; Stratmann, F.; Worsnop, D. R.; Mohler, O.; Leisner, T.; Schnaiter, M.;
      Published Date:
      2016
      Source:
      Atmospheric Chemistry and Physics, 16(7), 4423-4438.
      Description:
      Under certain conditions, secondary organic aerosol (SOA) particles can exist in the atmosphere in an amorphous solid or semi-solid state. To determine their relevance to processes such as ice nucleation or chemistry occurring within particles requir...
      File Type:
      Filetype[PDF - 3.46 MB]
    6. Filetype[PDF - 6.69 MB]
      Personal Author:
      Butler, R.; Palmer, P. I.; Feng, L.; Andrews, S. J.; Atlas, E. L.; Carpenter, L. J.; Donets, V.; Harris, N. R. P.; Montzka, S. A.; Pan, L. L.; Salawitch, R. J.; Schauffler, S. M.;
      Published Date:
      2018
      Source:
      Atmospheric Chemistry and Physics, 18(17), 13135-13153.
      Description:
      We use the GEOS-Chem global 3-D atmospheric chemistry transport model to interpret atmospheric observations of bromoform (CHBr3) and dibromomethane (CH2Br2) collected during the CAST and CONTRAST aircraft measurement campaigns over the western Pacifi...
      File Type:
      Filetype[PDF - 6.69 MB]
    7. Filetype[PDF - 6.51 MB]
      Personal Author:
      Fried, A.; Barth, M. C.; Bela, M.; Weibring, P.; Richter, D.; Walega, J.; Li, Y.; Pickering, K.; Apel, E.; Hornbrook, R.; Hills, A.; Riemer, D. D.; Blake, N.; Blake, D. R.; Schroeder, J. R.; Luo, Z. J.; Crawford, J. H.; Olson, J.; Rutledge, S.; Betten, D.; Biggerstaff, M. I.; Diskin, G. S.; Sachse, G.; Campos, T.; Flocke, F.; Weinheimer, A.; Cantrell, C.; Pollack, I.; Peischl, J.; Froyd, K.; Wisthaler, A.; Mikoviny, T.; Woods, S.;
      Published Date:
      2016
      Source:
      Journal of Geophysical Research-Atmospheres, 121(12), 7430-7460.
      Description:
      We have developed semi-independent methods for determining CH2O scavenging efficiencies (SEs) during strong midlatitude convection over the western, south-central Great Plains, and southeastern regions of the United States during the 2012 Deep Convec...
      File Type:
      Filetype[PDF - 6.51 MB]
    8. Filetype[PDF - 3.54 MB]
      Personal Author:
      Janssens-Maenhout, G.; Crippa, M.; Guizzardi, D.; Dentener, F.; Muntean, M.; Pouliot, G.; Keating, T.; Zhang, Q.; Kurokawa, J.; Wankmuller, R.; van der Gon, H. D.; Kuenen, J. J. P.; Klimont, Z.; Frost, G.; Darras, S.; Koffi, B.; Li, M.;
      Published Date:
      2015
      Source:
      Atmospheric Chemistry and Physics, 15(19), 11411-11432.
      Description:
      The mandate of the Task Force Hemispheric Transport of Air Pollution (TF HTAP) under the Convention on Long-Range Transboundary Air Pollution (CLRTAP) is to improve the scientific understanding of the intercontinental air pollution transport, to quan...
      File Type:
      Filetype[PDF - 3.54 MB]
    9. Filetype[PDF - 7.20 MB]
      Personal Author:
      Brown, S. S.; Dube, W. P.; Tham, Y. J.; Zha, Q. Z.; Xue, L. K.; Poon, S.; Wang, Z.; Blake, D. R.; Tsui, W.; Parrish, D. D.; Wang, T.;
      Published Date:
      2016
      Source:
      Journal of Geophysical Research-Atmospheres, 121(5), 2457-2475.
      Description:
      Nighttime reactions of nitrogen oxides influence ozone, volatile organic compounds, and aerosol and are thus important to the understanding of regional air quality. Despite large emissions and rapid recent growth of nitrogen oxide concentrations, the...
      File Type:
      Filetype[PDF - 7.20 MB]
    10. Filetype[PDF - 7.02 MB]
      Personal Author:
      Kim, J.; Johnson, L. E.; Cifelli, R.; Choi, J.; Chandrasekar, V.;
      Published Date:
      2018
      Source:
      Water, 10(7), 21.
      Description:
      Soil moisture retention (SMR) capacity plays a key role in estimating the direct runoff when a multi-pulse storm event occurs. It is very important to know how much SMR will be recovered during the intervals of no rain of a multi-pulse storm. This st...
      File Type:
      Filetype[PDF - 7.02 MB]
    11. Filetype[PDF - 1.81 MB]
      Personal Author:
      Fairall, C. W.; Matrosov, S. Y.; Williams, C. R.; Walsh, E. J.;
      Published Date:
      2018
      Source:
      Journal of Atmospheric and Oceanic Technology, 35(3), 593-608.
      Description:
      The NOAA W-band radar was deployed on a P-3 aircraft during a study of storm fronts off the U.S. West Coast in 2015 in the second CalWater (CalWater-2) field program. This paper presents an analysis of measured equivalent radar reflectivity factor Z(...
      File Type:
      Filetype[PDF - 1.81 MB]
    12. Filetype[PDF - 5.19 MB]
      Personal Author:
      Mahish, M.; Jefferson, A.; Collins, D. R.;
      Published Date:
      2018
      Source:
      Atmosphere, 9(2), 18.
      Description:
      A 4-year record of aerosol size and hygroscopic growth factor distributions measured at the Department of Energy's Southern Great Plains (SGP) site in Oklahoma, U.S. were used to estimate supersaturation (S)-dependent cloud condensation nuclei concen...
      File Type:
      Filetype[PDF - 5.19 MB]
    13. Filetype[PDF - 4.56 MB]
      Personal Author:
      Mahoney, K.; Swales, D.; Mueller, M. J.; Alexander, M.; Hughes, M.; Malloy, K.;
      Published Date:
      2018
      Source:
      Journal of Climate, 31(16), 6281-6297.
      Description:
      Atmospheric rivers (ARs) are well-known producers of precipitation along the U.S. West Coast. Depending on their intensity, orientation, and location of landfall, some ARs penetrate inland and cause heavy rainfall and flooding hundreds of miles from ...
      File Type:
      Filetype[PDF - 4.56 MB]
    14. Filetype[PDF - 1.47 MB]
      Personal Author:
      Dimdore-Miles, O. B.; Palmer, P. I.; Bruhwiler, L. P.;
      Published Date:
      2018
      Source:
      Atmospheric Chemistry and Physics, 18(24), 17895-17907.
      Description:
      We consider the utility of the annual inter-polar difference (IPD) as a metric for changes in Arctic emissions of methane (CH4). The IPD has been previously defined as the difference between weighted annual means of CH4 mole fraction data collected a...
      File Type:
      Filetype[PDF - 1.47 MB]
    15. Filetype[PDF - 1.26 MB]
      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 ...
      File Type:
      Filetype[PDF - 1.26 MB]
    16. Filetype[PDF - 1.13 MB]
      Personal Author:
      Richardson, K.; Asmutis-Silvia, R.; Drinkwin, J.; Gilardi, K. V. K.; Giskes, I.; Jones, G.; O'Brien, K.; Pragnell-Raasch, H.; Ludwig, L.; Antonelis, K.; Barco, S.; Henry, A.; Knowlton, A.; Landry, S.; Mattila, D.; MacDonald, K.; Moore, M.; Morgan, J.; Robbins, J.; van der Hoop, J.; Hogan, E.;
      Published Date:
      2019
      Source:
      Marine Pollution Bulletin, 138, 222-229.
      Description:
      Abandoned, lost or discarded fishing gear (ALDFG) comprises a significant amount of global marine debris, with diverse impacts to marine environments, wildlife, and the fishing industry. Building evidence on ALDFG is critical to holistically understa...
      File Type:
      Filetype[PDF - 1.13 MB]
    17. Filetype[PDF - 2.34 MB]
      Personal Author:
      Smith, M.; Stammerjohn, S.; Persson, O.; Rainville, L.; Liu, G. Q.; Perrie, W.; Robertson, R.; Jackson, J.; Thomson, J.;
      Published Date:
      2018
      Source:
      Journal of Geophysical Research-Oceans, 123(5), 3164-3185.
      Description:
      High-resolution measurements of the air-ice-ocean system during an October 2015 event in the Beaufort Sea demonstrate how stored ocean heat can be released to temporarily reverse seasonal ice advance. Strong on-ice winds over a vast fetch caused mixi...
      File Type:
      Filetype[PDF - 2.34 MB]
    18. Filetype[PDF - 724.45 KB]
      Personal Author:
      Chakraborty, A.; Ervens, B.; Gupta, T.; Tripathi, S. N.;
      Published Date:
      2016
      Source:
      Journal of Geophysical Research-Atmospheres, 121(8), 4317-4332.
      Description:
      Size-resolved fog water samples were collected in two consecutive winters at Kanpur, a heavily polluted urban area of India. Samples were analyzed by an aerosol mass spectrometer after drying and directly in other instruments. Residues of fine fog dr...
      File Type:
      Filetype[PDF - 724.45 KB]
    19. Filetype[PDF - 4.19 MB]
      Personal Author:
      Kim, P. S.; Jacob, D. J.; Fisher, J. A.; Travis, K.; Yu, K.; Zhu, L.; Yantosca, R. M.; Sulprizio, M. P.; Jimenez, J. L.; Campuzano-Jost, P.; Froyd, K. D.; Liao, J.; Hair, J. W.; Fenn, M. A.; Butler, C. F.; Wagner, N. L.; Gordon, T. D.; Welti, A.; Wennberg, P. O.; Crounse, J. D.; St. Clair, J. M.; Teng, A. P.; Millet, D. B.; Schwarz, J. P.; Markovic, M. Z.; Perring, A. E.;
      Published Date:
      2015
      Source:
      Atmos. Chem. Phys., 15(18), 10411-10433.
      File Type:
      Filetype[PDF - 4.19 MB]
    20. Filetype[PDF - 5.27 MB]
      Personal Author:
      Heiblum, R. H.; Altaratz, O.; Koren, I.; Feingold, G.; Kostinski, A. B.; Khain, A. P.; Ovchinnikov, M.; Fredj, E.; Dagan, G.; Pinto, L.; Yaish, R.; Chen, Q.;
      Published Date:
      2016
      Source:
      Journal of Geophysical Research-Atmospheres, 121(11), 6336-6355.
      Description:
      We study the evolution of warm convective cloud fields using large eddy simulations of continental and trade cumulus. Individual clouds are tracked a posteriori from formation to dissipation using a 3-D cloud-tracking algorithm, and results are prese...
      File Type:
      Filetype[PDF - 5.27 MB]

You May Also Like:

  1. Filetype[PDF - 10.56 MB]
    Personal Author:
    Maahn, Maximilian; Hoffmann, Fabian; Shupe, ,Matthew D.; de Boer, Gijs; Matrosov, Sergey Y.; Luke, Edward P.;
    Published Date:
    2019
    Source:
    Atmos. Meas. Tech., 12, 3151–3171, 2019
    Description:
    Cloud radars are unique instruments for observing cloud processes, but uncertainties in radar calibration have frequently limited data quality. Thus far, no single robust method exists for assessing the calibration of past cloud radar data sets. Here...
    File Type:
    Filetype[PDF - 10.56 MB]
  2. Filetype[PDF - 4.76 MB]
    Personal Author:
    Keck, Bruce
    Corporate Authors:
    United States, National Environmental Satellite, Data, and Information Service,
    Published Date:
    1986
    Series:
    Packaged literature search ; 86-1
    File Type:
    Filetype[PDF - 4.76 MB]
  3. Filetype[PDF - 9.02 MB]
    Personal Author:
    McCaffrey, Katherine; Bianco, Laura; Wilczak, James M.;
    Published Date:
    2017
    Source:
    Atmos. Meas. Tech., 10, 2595–2611, 2017
    Description:
    Observations of turbulence dissipation rates in the planetary boundary layer are crucial for validation of parameterizations in numerical weather prediction models. However, because dissipation rates are difficult to obtain, they are infrequently mea...
    File Type:
    Filetype[PDF - 9.02 MB]