peakTree: a framework for structure-preserving radar Doppler spectra analysis

Radenz, Martin; Bühl, Johannes; Seifert, Patric; Griesche, Hannes; Engelmann, Ronny

doi:https://doi.org/10.5194/amt-12-4813-2019

Articles | Volume 12, issue 9

https://doi.org/10.5194/amt-12-4813-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Arctic mixed-phase clouds as studied during the ACLOUD/PASCAL...

https://doi.org/10.5194/amt-12-4813-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 12, issue 9

Research article

|

10 Sep 2019

Research article |

| 10 Sep 2019

peakTree: a framework for structure-preserving radar Doppler spectra analysis

Martin Radenz, Johannes Bühl, Patric Seifert, Hannes Griesche, and Ronny Engelmann

Data sets

Upper air soundings during POLARSTERN cruise PS106.2 (ARK-XXXI/1.2) H. Schmithüsen https://doi.org/10.1594/PANGAEA.882843

Atmospheric Radiation Measurement (ARM) user facility, updated hourly. Ka ARM Zenith Radar (KAZRSPECCMASKGECOPOL). 2014-02-02 to 2014-02-03, ARM Mobile Facility (TMP) U. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AMF2 (M1) N. Bharadwaj, A. Matthews, D. Nelson, I. Lindenmaier, B. Isom, J. Hardin, and K. Johnson https://doi.org/10.5439/1025218

Model code and software

peakTree version of Aug2019 M. Radenz, J. Bühl, and P. Seifert https://doi.org/10.5281/zenodo.3369295

Short summary

Clouds may be composed of more than one particle population even at the smallest scales. Cloud radar observations can contain information on multiple particle species, showing up as distinct peaks and subpeaks in the Doppler spectrum. We propose the use of binary tree structures to recursively structure these peaks. Two case studies from different locations and instruments illustrate how this approach can be used to disentangle particle populations in multilayered mixed-phase clouds.