Abstract
Abstract. Continuous, semi-long-term, ground-based in situ cloud measurements were conducted during eight Pallas Cloud Experiments (PaCEs) held in autumn between 2004 and 2019. Those campaigns were carried out in the Finnish sub-Arctic region at the Sammaltunturi station (67∘58′24′′ N, 24∘06′58′′ E; 560 m a.m.s.l.), the part of the Pallas Atmosphere–Ecosystem Supersite and Global Atmosphere Watch (GAW) program. Two cloud spectrometer ground setups and a weather station were installed on the roof of the station to measure in situ cloud properties and several meteorological variables. Thus, the obtained data sets include the size distribution of cloud droplets as a measured cloud parameter along with the air temperature, dew point temperature, humidity, pressure, horizontal wind speed and direction, (global solar) sun radiation, and visibility at the station. Additionally, the number concentration, effective diameter, median volume diameter, and liquid water content from each instrument were derived. The presented data sets provide a insight into microphysics of low-level clouds in sub-Arctic conditions over a wide range of temperatures (−25.8 to 8.8 ∘C). The data are available in the Finnish Meteorological Institute (FMI) open data repository for each campaign and each cloud spectrometer ground setup individually: https://doi.org/10.23728/FMI-B2SHARE.988739D21B824C709084E88ED6C6D54B (Doulgeris et al., 2021).
Highlights
Clouds are considered a major component of both the climate system and the hydrological cycle
We present a unique data set of ground in situ cloud measurements along with several meteorological variables collected at the Sammaltunturi station in eight autumn campaigns conducted between 2004 and 2019
Both spectrometers were equipped with anti-ice systems as they were modified by the manufacturers (DMT for CAPS and PMS for FSSP-100) for ground-based use
Summary
Clouds are considered a major component of both the climate system and the hydrological cycle. Data sets that have been obtained from measurements in sub-Arctic clouds are significant as cloud processes are of high value since cloud processes are considered an important component of climate change in the Arctic region (Wendisch et al, 2019). We present a unique data set of ground in situ cloud measurements along with several meteorological variables collected at the Sammaltunturi station in eight autumn campaigns conducted between 2004 and 2019. This data set can be used in studies of cloud microphysics, climate change in the subArctic, and performance evaluation and improvement of existing models, in particular at higher altitudes. We provide a description of the sampling location, instrumentation, and the measurement methodology we used for sampling, data processing, and quality control
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