http://bolin.su.se/data/oden-swerus-2014-misu-weather-3 John Prytherch, Michael Tjernström Bolin Centre Database 2020 Datafile Atmosphere Weather observations Weather station Meteorology Arctic boundary layer Arctic clouds High Arctic Arctic Ocean Laptev Sea Chukchi Sea East Siberian Sea Kara Sea SWERUS-C3 ACSE Oden Earth science > Atmosphere John Prytherch 2020-03-18T14:51:07+00:00 English 3 None Data from the MISU weather station, averaged over either 1 or 30-minute intervals. Three data formats are available: Matlab (.mat), NetCDF (.nc) and comma separated value (.csv) text, with an accompanying readme (.rtf) file. The main components of the MISU weather station (Gill 2D sonic anemometer, Vaisala PTU TRH and pressure sensor, Eppley PIR and PSP downwelling radiation sensors) were mounted mid-ship on the 7th deck forward railing. Two Heitronics KT15.IIp infrared sensors for measurement of surface temperature (managed by University of Leeds) were mounted separately on the 7th deck, to enable measurement of the sea/ice surface to beam of the ship. An additional aspirated Rotronic TRH sensor was mounted at the top of Oden’s foremast. Winds are measured relative to the ship. The ship acts to distort the wind speed and direction, increasingly so for winds away from bow-on. A computational fluid dynamics (CFD) model of airflow over Oden is used to correct the measured winds for wind directions within 110° of bow on. Due to the significant distortion at the site of the weather station, weather station winds should be treated with caution for wind directions more than 60° from bow on. The ship-relative winds and navigation data are also used to derive ‘true’ wind speed and direction. Downwelling radiation sensors were subject to icing during the expedition. Ice was removed with regular cleaning. Clear-sky radiation determined from radiosonde measurements and RRTM simulations was used to provide further quality control. A flag is provided to indicate when solar radiation may be affected by shading from the ship superstructure. Data from the system are combined into a cruise-length file. The data are time-averaged to both 1-minute and 30-minute intervals, to correspond with the micrometeorological averaging periods used for the mast sensors. These data were processed by [Joe Sedlar](mailto:joseph.sedlar@Colorado.EDU) (CIRES, University of Colorado, Boulder). The Arctic Clouds in Summer Experiment (ACSE) was a component in the Swedish–Russian–US SWERUS-C3 expedition. The main scientific questions of SWERUS-C3 concerned the linkages between climate, cryosphere, and carbon. ACSE was focused on exploring the role of clouds in shaping the new Arctic climate. Clouds remain a large uncertainty in our understanding of the climate system, in particular in the Arctic. The understanding of the processes involved is poor in part because of a lack of direct observations. The icebreaker Oden was equipped with a suite of in-situ and remote sensing instruments to study these processes in detail, with field work along the Russian Arctic coast on the icebreaker Oden during three months from early summer to early autumn (July 6 to October 14, 2014). More information about the [SWERUS-C3 expedition](https://polarforskningsportalen.se/en/arctic/expeditions/swerus-c3) is available from the Swedish Polar Research Secretariat. See also [SWERUS-C3 program](http://www.swerus-c3.geo.su.se/) website, managed by the Department of Geological Sciences, Stockholm University. #### Version history ##### Version 3 Incorporates updated clear sky radiative fluxes determined from RRTM simulations. Now the clear sky shortwave radiative fluxes are from RRTM_SW using the nearest 5-day mean surface albedo. ##### Version 2 Initial release. Also known as version 2.1. ##### Version 1 Not published.