[{"name":"oden-swerus-2014-navigation-2","title":"Navigation, meteorological and surface seawater data from the SWERUS-C3 Arctic Ocean expedition in 2014","summary":"Measurements from icebreaker Oden\u2019s navigation, meteorological and surface seawater systems from the SWERUS-C3 expedition to the Eastern Arctic Ocean in July to October 2014.\r\n \r\nThe dataset provides rare meteorological and surface sea water observations from sea-ice regions of the Arctic Ocean, as well as Oden\u2019s navigation data. The data enable analysis of meteorological conditions and provide context for other measurements and analysis associated with the expedition.\r\n \r\nMeasurements of wind, temperature, humidity and pressure were made from sensors above Oden\u2019s bridge (25\u2060\u200a\u2013\u200a\u206035 m above sea level). Measurements of seawater properties (temperature, salinity, conductivity and sound velocity) were performed by sensors in the main laboratory on the pumped underway line, with an intake at 8 m depth. Water temperature was also measured with hull contact sensors located close to the underway line intake. These data were processed as part of the Arctic Clouds in Summer Experiment (ACSE).","citations":"Tjernstr\u00f6m, M., Achtert, P., Shupe, M. D., Prytherch, J., Sedlar, J., Brooks, B. J., Brooks, I. M., Persson, P. O. G., Sotiropoulou, G., Salisbury, D. J. (2019). Arctic summer air-mass transformation, surface inversions and the surface energy budget. Journal of Climate: 32, 769\u2013789. doi:10.1175\/JCLI-D-18-0216.1\r\n\r\nSotiropoulou, G., Tjernstr\u00f6m, M., Savre, J., Ekman, A. M. L., Hartung, K., and Sedlar, J. (2018). Warm-air advection and air-mass transformation over melting sea ice in the summer Arctic. Quarterly Journal of the Royal Meteorological Society: 144, 2449\u20132462. doi:10.1002\/qj.3316\r\n\r\nPrytherch, J., Brooks, I. M., Crill, P. M., Thornton, B. F., Salisbury, D. J., Tjernstr\u00f6m, M., Anderson, L. G., Geibel, M. C., Humborg, C. (2017): Direct determination of the air-sea CO2 gas transfer velocity in Arctic sea-ice regions. Geophys. Res. Lett., 44. doi:10.1002\/2017GL073593\r\n\r\nSotiropoulou, G., Tjernstr\u00f6m, M., Sedlar, J., Achtert, P., Brooks, B. J., Brooks, I. M., Persson, P. O. G., Prytherch, J., Salisbury, D. J., Shupe, M. D., Johnston, P. E., Wolfe, D. (2016): Atmospheric conditions during the Arctic Clouds in Summer Experiment (ACSE): Contrasting open-water and sea-ice surfaces during melt and freeze-up seasons. J. Clim., 29, 8721\u2013 8744. doi:10.1175\/JCLI-D-16-0211.1\r\n\r\nAchtert, P., Brooks, I. M., Brooks, B. J., Prytherch, J., Persson, P. O. G., Tjernstr\u00f6m, M. (2015): Measurement of wind profiles over the Arctic Ocean from ship-borne Doppler lidar. Atmos. Meas. Tech. 8, 4993-5007. doi:10.5194\/amt-8-4993-2015\r\n\r\nTjernstr\u00f6m, M., Shupe, M. D., Brooks, I. M., Persson, P. O. G., Prytherch, J., Salisbury, D. J., Sedlar, J., Achtert, P., Brooks, B. J., Johnston, P. E, Sotiropoulou, G., Wolfe, D. (2015): Warm-air advection, air mass transformation and fog causes rapid ice melt. Geophys. Res. Lett., 42.  doi:10.1002\/2015GL064373","comments":"Sensors were operated and maintained by icebreaker Oden\u2019s ship crew and the Swedish Polar Research Secretariat staff. The following processing was carried out post-expedition: (i) True winds were re-calculated from the measured ship-relative winds using the navigation data to correct an error in the original true wind calculation; (ii) Large variations in the underway line salinity measurement (resulting from variations in line flow speed due to e.g. ice blockages) were removed and interpolated over. A flag indicates interpolation. Other underway line measurements are not adjusted.\r\n\r\nData from the various systems are combined into a single, cruise-length file. The file is time-averaged to either 1-minute or 30-minute, to correspond with the micrometeorological averaging periods used for the mast sensors.\r\n\r\nThe Arctic Clouds in Summer Experiment (ACSE) was a component in the Swedish\u2013Russian\u2013US 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).\r\n\r\nMore 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.\r\n\r\n#### Version history\r\n\r\n##### Version 2\r\nEssentially the same data as in version 1, but with an updated readme file and new metadata within the nc files.\r\n\r\n##### Version 1\r\nInitial release. Also known as version 1.1.","category":"Atmosphere","subcategory":"Observations","keywords":"Ship log; Meteorology; Seawater temperature; Salinity; Ship navigation; Position and speed; High Arctic; Arctic Ocean; Laptev Sea; Chukchi Sea; East Siberian Sea; Kara Sea; SWERUS-C3; ACSE; Oden","scientist":"John Prytherch, Michael Tjernstr\u00f6m","firstname":"John","lastname":"Prytherch","address":"Department of Meteorology (MISU); Stockholm University","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Atmosphere","location":"Ocean > Arctic Ocean","progress":"Completed","language":"English","project":"Arctic Clouds in Summer Experiment (ACSE). This was a component in the SWERUS-C3 international research expedition 2014 using icebreaker Oden in the Arctic Ocean, with base funding from the Swedish Knut and Alice Wallenberg Foundation.","publisher":"Bolin Centre Database","version":"2","constrains":"None","access":"Free"}]