Abstract
Abstract. Between 1 July and 30 September 2018, small unmanned aircraft systems (sUAS), tethered balloon systems (TBSs), and additional radiosondes were deployed at Oliktok Point, Alaska, to measure the atmosphere in support of the second special observing period for the Year of Polar Prediction (YOPP). These measurements, collected as part of the Profiling at Oliktok Point to Enhance YOPP Experiments (POPEYE) campaign, targeted quantities related to enhancing our understanding of boundary layer structure, cloud and aerosol properties and surface–atmosphere exchange and providing extra information for model evaluation and improvement work. Over the 3-month campaign, a total of 59 DataHawk2 sUAS flights, 52 TBS flights, and 238 radiosonde launches were completed as part of POPEYE. The data from these coordinated activities provide a comprehensive three-dimensional data set of the atmospheric state (air temperature, humidity, pressure, and wind), surface skin temperature, aerosol properties, and cloud microphysical information over Oliktok Point. These data sets have been checked for quality and submitted to the US Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) program data archive (http://www.archive.arm.gov/discovery/, last access: July 2019) and are accessible at no cost by all registered users. The primary dataset DOIs are https://doi.org/10.5439/1418259 (DataHawk2 measurements; Atmospheric Radiation Measurement Program, 2016), https://doi.org/10.5439/1426242 (TBS measurements; Atmospheric Radiation Measurement Program, 2017) and https://doi.org/10.5439/1021460 (radiosonde measurements; Atmospheric Radiation Measurement Program, 2013a).
Highlights
Recent decades have seen notable shifts in Arctic climate (Serreze et al, 2007; Screen and Simmonds, 2010)
This paper describes the data set collected during POPEYE
While the exact placement of the sensors would change from flight to flight to adapt to the present conditions, in general the system was operated with a cluster of sensors, including a Printed Optical Particle Spectrometers (POPS), Condensation Particle Counter (CPC), iMet and Supercooled Liquid Water Content” (SLWC) near the top of the tether under the balloon, a distributed temperature sensing (DTS) fiber along the entire length of the tether, and subsequent iMet sensors and anemometers below the main package as most desirable based on the meteorological conditions
Summary
Recent decades have seen notable shifts in Arctic climate (Serreze et al, 2007; Screen and Simmonds, 2010). As part of the second SOP, the DOE ARM program supported efforts to enhance observational coverage of the atmosphere at the AMF-3 in Oliktok Point, Alaska (Fig. 1) This project, titled Profiling at Oliktok Point to Enhance YOPP Experiments (POPEYE), included deployment of the DataHawk unmanned aircraft system, tethered balloon systems, and one additional radiosonde per day (three launches daily versus the standard twice-daily launch schedule followed at the observatory) to provide measurements needed to help meet the objectives above. The lower-atmospheric thermodynamic observations offer a detailed look into the Arctic summertime boundary layer, providing insight into its structure and evolution and a means of validating retrieval algorithms from remote sensors Such measurements support the stated YOPP goal of pursuing an integrated modeling framework to connect cloud, boundary layer and surface energy exchange schemes through large eddy simulation (LES)-based development.
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