Dust orientation measurements

<p><strong>Abstract. </strong>Dust orientation is an ongoing investigation in recent years (Ulanowski et al., 2007). Its potential proof will be a paradigm shift for dust remote sensing, invalidating the currently used simplifications of randomly-oriented particles. Vertically-resolved measurements of dust orientation can be acquired with the new polarization lidar &#8220;WALL-E&#8221;, designed to target the off-diagonal elements of the backscatter matrix which are non-zero only when the particles are oriented (Tsekeri et al., 2021). Herein, we present first measurements of oriented dust particles acquired during the ESA Aeolus Cal/Val Campaign &#8220;ASKOS&#8221; at Cabo Verde (June and September 2022).</p> <p>&#160;</p> <p><strong>Acknowledgments:</strong> This research was supported by D-TECT (Grant Agreement 725698) funded by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program and PANGEA4CalVal (Grant Agreement 101079201) funded by European Union&#8217;s Horizon Widera 2021 Access program.</p> <p>&#160;</p> <p>&#160;</p> <p><strong>References:</strong></p> <p>Tsekeri, A., et al.: Polarization lidar for detecting dust orientation: system design and calibration, Atmos. Meas. Tech., 14, 7453&#8211;7474, 2021.</p> <p>Ulanowski, Z., et al.: Alignment of atmospheric mineral dust due to electric field, Atmos. Chem. Phys., 7, 6161&#8211;6173, 2007.</p>