Articles | Volume 15, issue 4
https://doi.org/10.5194/amt-15-965-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-15-965-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Feb 2022
Research article |
| 23 Feb 2022
| 23 Feb 2022
Cloud microphysical measurements at a mountain observatory: comparison between shadowgraph imaging and phase Doppler interferometry
Moein Mohammadi
CORRESPONDING AUTHOR
Institute of Geophysics, Faculty of Physics, University of Warsaw, Warsaw, Poland
Jakub L. Nowak
Institute of Geophysics, Faculty of Physics, University of Warsaw, Warsaw, Poland
Guus Bertens
Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany
Jan Moláček
Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany
Wojciech Kumala
Institute of Geophysics, Faculty of Physics, University of Warsaw, Warsaw, Poland
Szymon P. Malinowski
Institute of Geophysics, Faculty of Physics, University of Warsaw, Warsaw, Poland
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Cited articles
Bachalo, W. D.:
Method for measuring the size and velocity of spheres by dual-beam light-scatter interferometry,
Appl. Optics, 19, 363–370, https://doi.org/10.1364/ao.19.000363, 1980. a
Bachalo, W. D. and Houser, M. J.:
Phase/Doppler Spray Analyzer For Simultaneous Measurements Of Drop Size And Velocity Distributions,
Opt. Eng., 23, 235583, https://doi.org/10.1117/12.7973341, 1984. a, b
Bachalo, W. D. and Sankar, S. V.: Phase doppler particle analyzer, in: Handbook of Fluid Dynamics, 2nd edn., edited by: Johnson, R. W., CRC Press, Boca Raton, https://doi.org/10.1201/b19031, 2016. a
Beals, M. J., Fugal, J. P., Shaw, R. A., Lu, J., Spuler, S. M., and Stith, J. L.:
Holographic measurements of inhomogeneous cloud mixing at the centimeter scale, Science, 350, 87–90, https://doi.org/10.1126/science.aab0751, 2015. a
Beck, A., Henneberger, J., Schöpfer, S., Fugal, J., and Lohmann, U.: HoloGondel: in situ cloud observations on a cable car in the Swiss Alps using a holographic imager, Atmos. Meas. Tech., 10, 459–476, https://doi.org/10.5194/amt-10-459-2017, 2017. a
Beck, I. and Neumann, M.: The Environmental Research Station Schneefernerhaus, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-21235, https://doi.org/10.5194/egusphere-egu2020-21235, 2020. a
Bewley, G. P., Saw, E. W., and Bodenschatz, E.:
Observation of the sling effect,
New J. Phys., 15, 083051, https://doi.org/10.1088/1367-2630/15/8/083051, 2013. a
Bordás, R., Roloff, C., Thévenin, D., and Shaw, R. A.:
Experimental determination of droplet collision rates in turbulence,
New J. Phys., 15, 045010, https://doi.org/10.1088/1367-2630/15/4/045010, 2013. a
Burnet, F. and Brenguier, J.:
Comparison between standard and modified Forward Scattering Spectrometer Probes during the Small Cumulus Microphysics Study, J. Atmos. Ocean. Tech.,
19, 1516–1531, 2002. a
Cooper, W. A.:
Effects of Coincidence on Measurements with a Forward Scattering Spectrometer Probe,
J. Atmos. Ocean. Tech.,
5, 823–832, https://doi.org/10.1175/1520-0426(1988)005<0823:EOCOMW>2.0.CO;2, 1988. a
Desai, N., Glienke, S., Fugal, J., and Shaw, R. A.:
Search for Microphysical Signatures of Stochastic Condensation in Marine Boundary Layer Clouds Using Airborne Digital Holography,
J. Geophys. Res.-Atmos., 124, 2739–2752, https://doi.org/10.1029/2018JD029033, 2019. a
Fugal, J. P. and Shaw, R. A.: Cloud particle size distributions measured with an airborne digital in-line holographic instrument, Atmos. Meas. Tech., 2, 259–271, https://doi.org/10.5194/amt-2-259-2009, 2009. a
Gerber, H., Arends, B. G., and Ackerman, A. S.:
New microphysics sensor for aircraft use, Atmos. Res., 31, 235–252, https://doi.org/10.1016/0169-8095(94)90001-9, 1994. a
Ghasemifard, H., Vogel, F. R., Yuan, Y., Luepke, M., Chen, J., Ries, L., Leuchner, M., Schunk, C., Vardag, S. N., and Menzel, A.:
Pollution events at the high-altitude mountain site Zugspitze-Schneefernerhaus (2670
Glienke, S., Kostinski, A., Fugal, J., Shaw, R. A., Borrmann, S., and Stith, J.: Cloud droplets to drizzle: Contribution of transition drops to microphysical and optical properties of marine stratocumulus clouds,
Geophys. Res. Lett., 44, 8002–8010, https://doi.org/10.1002/2017GL074430, 2017. a
Henneberger, J., Fugal, J. P., Stetzer, O., and Lohmann, U.: HOLIMO II: a digital holographic instrument for ground-based in situ observations of microphysical properties of mixed-phase clouds, Atmos. Meas. Tech., 6, 2975–2987, https://doi.org/10.5194/amt-6-2975-2013, 2013. a
Kashdan, J. T., Shrimpton, J. S., and Whybrew, A.:
Two-phase flow characterization by automated digital image analysis. Part 1: Fundamental principles and calibration of the technique,
Part. Part. Syst. Char., 20, 387–397, https://doi.org/10.1002/ppsc.200300897, 2003. a
Kashdan, J. T., Shrimpton, J. S., and Whybrew, A.:
Two-phase flow characterization by automated digital image analysis. Part 2: Application of PDIA for sizing sprays,
Part. Part. Syst. Char., 21, 15–23, https://doi.org/10.1002/ppsc.200400898, 2004. a
Kashdan, J. T., Shrimpton, J. S., and Whybrew, A.:
A digital image analysis technique for quantitative characterisation of high-speed sprays, Opt. Laser. Eng., 45, 106–115, https://doi.org/10.1016/j.optlaseng.2006.03.006, 2007. a
Klanner, L., Trickl, T., and Vogelmann, H.: Water-vapour measurements up to the lower stratosphere–the high power raman lidar at the schneefernerhaus,
in: EPJ Web of Conferences, 176, 1026, https://doi.org/10.1051/epjconf/201817601026, 2018. a
Lance, S.:
Coincidence Errors in a Cloud Droplet Probe (CDP) and a Cloud and Aerosol Spectrometer (CAS), and the Improved Performance of a Modified CDP,
J. Atmos. Ocean. Tech.,
29, 1532–1541, https://doi.org/10.1175/JTECH-D-11-00208.1, 2012. a
Lance, S., Brock, C. A., Rogers, D., and Gordon, J. A.: Water droplet calibration of the Cloud Droplet Probe (CDP) and in-flight performance in liquid, ice and mixed-phase clouds during ARCPAC, Atmos. Meas. Tech., 3, 1683–1706, https://doi.org/10.5194/amt-3-1683-2010, 2010. a
Larsen, M. L., Shaw, R. A., Kostinski, A. B., and Glienke, S.:
Fine-Scale Droplet Clustering in Atmospheric Clouds: 3D Radial Distribution Function from Airborne Digital Holography,
Phys. Rev. Lett.,
121, 204501, https://doi.org/10.1103/PhysRevLett.121.204501, 2018. a
Lawson, R. P., Baker, B. A., Schmitt, C. G., and Jensen, T. L.:
An overview of microphysical properties of Arctic clouds observed in May and July 1998 during FIRE ACE, J. Geophys. Res., 106, 14989–15014, https://doi.org/10.1029/2000JD900789, 2001. a, b
Lawson, R. P., Jensen, E., Mitchell, D. L., Baker, B., Mo, Q., and Pilson, B.: Microphysical and radiative properties of tropical clouds investigated in TC4 and NAMMA, J. Geophys. Res., 115, D00J08, https://doi.org/10.1029/2009jd013017, 2010. a, b
Lu, M. L., Conant, W. C., Jonsson, H. H., Varutbangkul, V., Flagan, R. C., and Seinfeld, J. H.:
The Marine Stratus/Stratocumulus Experiment (MASE): Aerosol-cloud relationships in marine stratocumulus,
J. Geophys. Res., 112, D10209, https://doi.org/10.1029/2006JD007985, 2007. a
Ramelli, F., Beck, A., Henneberger, J., and Lohmann, U.: Using a holographic imager on a tethered balloon system for microphysical observations of boundary layer clouds, Atmos. Meas. Tech., 13, 925–939, https://doi.org/10.5194/amt-13-925-2020, 2020. a, b
Raupach, S. M., Vössing, H. J., Curtius, J., and Borrmann, S.:
Digital crossed-beam holography for insitu imaging of atmospheric ice particles,
J. Opt. A-Pure Appl. Op., 8, 796, https://doi.org/10.1088/1464-4258/8/9/014, 2006. a
Risius, S., Xu, H., Di Lorenzo, F., Xi, H., Siebert, H., Shaw, R. A., and Bodenschatz, E.: Schneefernerhaus as a mountain research station for clouds and turbulence, Atmos. Meas. Tech., 8, 3209–3218, https://doi.org/10.5194/amt-8-3209-2015, 2015. a, b, c, d
Rydblom, S. and Thörnberg, B.:
Liquid water content and droplet sizing shadowgraph measuring system for wind turbine icing detection,
IEEE Sens. J., 16, 2714–2725, https://doi.org/10.1109/JSEN.2016.2518653, 2016. a
Schlenczek, O., Fugal, J. P., Lloyd, G., Bower, K. N., Choularton, T. W., Flynn, M., Crosier, J., and Borrmann, S.:
Microphysical Properties of Ice Crystal Precipitation and Surface-Generated Ice Crystals in a High Alpine Environment in Switzerland,
J. Appl. Meteorol. Clim., 56, 433–453, https://doi.org/10.1175/JAMC-D-16-0060.1, 2017. a
Siebert, H. and Teichmann, U.:
Behaviour of an ultrasonic anemometer under cloudy conditions,
Bound.-Lay. Meteorol., 94, 165–169, https://doi.org/10.1023/A:1002446723575, 2000. a, b
Siebert, H., Franke, H., Lehmann, K., Maser, R., Saw, E. W., Schell, D., Shaw, R. A., and Wendisch, M.:
Probing finescale dynamics and microphysics of clouds with helicopter-borne measurements,
B. Am. Meteorol. Soc.,
87, 1727–1738, 2006. a
Sijs, R., Kooij, S., Holterman, H. J., Zande, J. V. D., and Bonn, D.:
Drop size measurement techniques for sprays: Comparison of image analysis, phase Doppler particle analysis, and laser diffraction,
AIP Adv., 11, 15315, https://doi.org/10.1063/5.0018667, 2021. a
Spiegel, J. K., Zieger, P., Bukowiecki, N., Hammer, E., Weingartner, E., and Eugster, W.: Evaluating the capabilities and uncertainties of droplet measurements for the fog droplet spectrometer (FM-100), Atmos. Meas. Tech., 5, 2237–2260, https://doi.org/10.5194/amt-5-2237-2012, 2012. a, b
Stith, J. L., Dye, J. E., Bansemer, A., Heymsfield, A. J., Grainger, C. A., Petersen, W. A., and Cifelli, R.: Microphysical observations of tropical clouds, J. Appl. Meteorol., 41, 97–117, https://doi.org/10.1175/1520-0450(2002)041<0097:MOOTC>2.0.CO;2, 2002.
a, b
Wang, Z., Chan, K. L., Heue, K.-P., Doicu, A., Wagner, T., Holla, R., and Wiegner, M.: A multi-axis differential optical absorption spectroscopy aerosol profile retrieval algorithm for high-altitude measurements: application to measurements at Schneefernerhaus (UFS), Germany, Atmos. Meas. Tech., 13, 1835–1866, https://doi.org/10.5194/amt-13-1835-2020, 2020. a
Wirth, V., Kristen, M., Leschner, M., Reuder, J., and Schween, J. H.: Banner clouds observed at Mount Zugspitze, Atmos. Chem. Phys., 12, 3611–3625, https://doi.org/10.5194/acp-12-3611-2012, 2012. a, b
Woods, S., Lawson, R. P., Jensen, E., Bui, T. P., Thornberry, T., Rollins, A., Pfister, L., and Avery, M.:
Microphysical Properties of Tropical Tropopause Layer Cirrus,
J. Geophys. Res.-Atmos.,
123, 6053–6069, https://doi.org/10.1029/2017JD028068, 2018. a, b, c, d
Short summary
To compare two instruments, a VisiSize D30 shadowgraph system and a phase Doppler interferometer (PDI-FPDR), we performed a series of measurements of cloud droplet size and number concentration in orographic clouds. After applying essential modifications and filters to the data, the results from the two instruments showed better agreement in droplet sizing and velocimetry than droplet number concentration or liquid water content. Discrepancies were observed for droplets smaller than 13 µm.
To compare two instruments, a VisiSize D30 shadowgraph system and a phase Doppler interferometer...
