Research Interests:
Snowflake Imaging,
Manager of the Rain-Sea Interaction Facility (RSIF) at NASA WFF,
Rain effects on radar scattering from the sea-surface,
Rain effects on air-sea gas fluxes and
Cloud raindrop physics.
Larry F Bliven
(EMERITUS)
| Email: | francis.l.bliven@nasa.gov |
| Phone: | 757.824.1057 |
| Org Code: | 612 |
| Address: |
NASA/WFF Mail Code 612 Wallops, VA 23337 |
| Employer: | EMERITUS |
Brief Bio
Research Interests
Studies of Physical Processes Affecting Remote Sensing of Precipitation
Earth Science: PrecipitationResearch Interests:
Snowflake Imaging,
Manager of the Rain-Sea Interaction Facility (RSIF) at NASA WFF,
Rain effects on radar scattering from the sea-surface,
Rain effects on air-sea gas fluxes and
Cloud raindrop physics.
Current Projects
PI developing the Precipitation Imaging Package (PIP).
Climate
Precipitation particle descriptions are need to improve remote sensing measurements of water flux in cold regions. Instrumentation to provide those measurements are not commercially available. GMP ground calibration\validation studies require such data to develop\improve\validate measurements from space.
PIP is a state of the art instrument that acquires ~400 images per second, 24\7. The huge data flow (~ 1Billion images per instrument per month) is managed by NASA developed software that records the images to disc and analyses them to produce user friendly results.
PIPs are presently deployed in collaboration with GPM investigators in the US, Canada and Europe.
Positions/Employment
Research Scientist
NASA\GSFC - Wallops Flight Facility Code 610W Wallops Island, VA 23337
June 1985 - Present
Scatterometry from wind-waves.
Manager of the Rain-Sea Interaction Facility (RSIF) at NASA WFF.
Rain effects on radar scattering from the sea-surface.
Rain effects on air-sea gas fluxes.
Studied Cloud Raindrop Physics using High Speed Imaging.
Designed and Developed the Snow Video Imager (SVI).
Designed and Developed PIP, the Precipitation Imaging Package.
Research Scientist
Oceanic Hydrodynamics, Inc. - NASA Wallops Flight Facility Wallops Island, VA 23337
September 1979 - July 2005
NASA Contract to investigate wind effects on sea surface roughness and its effect on microwave scattering with respect to satellite remote sensing by altimeters and scatterometers.
Research Associate
North Carolina State University - Raleigh, NC
June 1976 - June 1979
Investigations of the effects of rain on nonpoint source pollution in rural watersheds, i.e. agricultural runoff during storms.
Education
Sept. 1971-May 1977 PhD Marine Sciences, North Carolina State University, Raleigh, NC
Sept. 1967-May 1971 BS Physics, North Carolina State University, Raleigh, NC
Sept. 1967-May 1971 BS Physics, North Carolina State University, Raleigh, NC
Professional Societies
AGU
1978 - Present
AMS
1980 - 1995
Awards
1990 – NASA-GSFC Achievement Award
1999 – NASA-GSFC Peer Award for Outreach
1999 – NASA-GSFC Peer Award for Outreach
Selected Publications
Refereed
2009. "Presenting the Snowflake Video Imager (SVI)." J Atmos Oce Technol 26 (2): 167-179 [10.1175/2008JTECHA1148.1] [Journal Article/Letter]
2009. "Snowflake Size Spectra Retrieved from a UHF Vertical Profiler." J Atmos Oce Technol 26 (2): 180-199 [10.1175/2008JTECHA1105.1] [Journal Article/Letter]
2009. "A relationship between rain radar reflectivity and height elevation variance of ringwaves due to the impact of rain on the sea surface." Radio Sci. 44 (3): RS3005 [10.1029/2008RS003880] [Journal Article/Letter]
1986. "An analytical model for oceanic whitecap coverage." J. Phys. Oceanogr. 16 (10): 1597-1604 [10.1175/1520-0485(1986)016<1597:AAMFOW>2.0.CO;2] [Journal Article/Letter]
1986. "A study of the relationship among wind speed, sea state, and the drag coefficient for a developing wave field." J. Geophys. Res. 91 (C6): 7733-7742 [10.1029/JC091iC06p07733] [Journal Article/Letter]
1986. "An experimental study of the statistical properties of wind generated gravity waves (Chapter 7)." Wave Dynamics and Radio Probing of the Ocean Surface 129-144 [10.1007/978-1-4684-8980-4_8] [Article in Book]
1986. "Experimental study of the influence of wind on Benjamin Feir sideband instability." J. Fluid Mech. 162 237-260 [10.1017/S0022112086002033] [Journal Article/Letter]
1984. "The harp probe: an in situ Bragg scattering sensor." J. Atmos. Oceanic Tech. 1 (4): 358-370 [10.1175/1520-0426(1984)001<0358:THPASB>2.0.CO;2] [Journal Article/Letter]
1984. "A new type of overshoot phenomenon in the wind wave development and its implication in the remote sensing of the ocean." J. Geophys. Res. 89 (C3): 3679-3687 [10.1029/JC089iC03p03679] [Journal Article/Letter]
1984. "A laboratory study of the velocity field below surface gravity waves." Gas Transfer at Water Surfaces 2 181-190 [10.1007/978-94-017-1660-4_16] [Article in Book]
1984. "The non Gaussian joint probability density function of slope and elevation for a nonlinear gravity wave field, J. Geophys. Res., 89, 1961 1972, 1984. ( Huang, N. E., S. R. Long, L. F. Bliven and C. C. Tung )." J. Geophys. Res. 89 1961-1972 [Journal Article/Letter]
1983. "A study on the spectral models for waves in the finite water depth." J. Geophys. Res. 88 (C14): 9579-9587 [10.1029/JC088iC14p09579] [Journal Article/Letter]
1983. "Non-Gaussian statistical model for surface elevation of nonlinear random wave fields." J. Geophys. Res. 88 (C12): 7597-7606 [10.1029/JC088iC12p07597] [Journal Article/Letter]
1981. "A unified two parameter wave spectral model for a general sea state." J. Fluid Mech. 112 203-224 [10.1017/S0022112081000360] [Journal Article/Letter]
1981. "On the importance of the significant slope in empirical wind wave studies." J. Physical Oceanogr. 11 (4): 569-573 [10.1175/1520-0485(1981)011<0569:OTIOTS>2.0.CO;2] [Journal Article/Letter]
Non-Refereed
2002. "Rain Rate Measurement with an Airborne Scanning Radar Altimeter." Proc IGARSS 2002 3 1875-1876 [Other]
1988. "An estimate of wave breaking probability for deep water waves." Sea Surface Sound: Natural Mechanisms of Surface Generated Noise in the Ocean 238 71-83 [10.1007/978-94-009-3017-9_6] [Article in Book]
Selected Public Outreach
Mentor
September 1985 - Present
NASA host for ~20 students including under graduates, graduate and post-doc, from the US and overseas.
PhD committee member for 3 European students.
PhD committee member for 1 US student.
MS committee member for 1 NASA-HQ funded student.
PhD committee member for 3 European students.
PhD committee member for 1 US student.
MS committee member for 1 NASA-HQ funded student.