In:
Atmospheric Chemistry and Physics, Copernicus GmbH, Vol. 18, No. 24 ( 2018-12-18), p. 17995-18022
Abstract:
Abstract. The two concerted
field campaigns, Arctic CLoud Observations Using airborne measurements during
polar Day (ACLOUD) and the Physical feedbacks of Arctic planetary boundary
level Sea ice, Cloud and AerosoL (PASCAL), took place near Svalbard from
23 May to 26 June 2017. They were focused on studying Arctic mixed-phase
clouds and involved observations from two airplanes (ACLOUD), an icebreaker
(PASCAL) and a tethered balloon, as well as ground-based stations. Here, we
present the synoptic development during the 35-day period of the campaigns,
using near-surface and upper-air meteorological observations, as well as
operational satellite, analysis, and reanalysis data. Over the campaign
period, short-term synoptic variability was substantial, dominating over the
seasonal cycle. During the first campaign week, cold and dry Arctic air from
the north persisted, with a distinct but seasonally unusual cold air
outbreak. Cloudy conditions with mostly low-level clouds prevailed. The
subsequent 2 weeks were characterized by warm and moist maritime air from
the south and east, which included two events of warm air advection. These
synoptical disturbances caused lower cloud cover fractions and
higher-reaching cloud systems. In the final 2 weeks, adiabatically warmed
air from the west dominated, with cloud properties strongly varying within the range of the two other periods. Results presented here provide
synoptic information needed to analyze and interpret data of upcoming studies
from ACLOUD/PASCAL, while also offering unprecedented measurements in a
sparsely observed region.
Type of Medium:
Online Resource
ISSN:
1680-7324
DOI:
10.5194/acp-18-17995-2018
DOI:
10.5194/acp-18-17995-2018-supplement
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2018
detail.hit.zdb_id:
2092549-9
detail.hit.zdb_id:
2069847-1
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