The IDAP (Ice Data Aqusition Programme) project was undertaken on commission from the oil companies to map the iceberg occurence in the Barents sea. The satellite images are provided by Tromsø Satellite Station. The aerial photos were obtained by russian flights in the years 1936-1991. The R/V Lance observations were obtained during the forthnight expeditions in the period 1988-1993.Data contains of: satellite images, aerial photos and observations from ships, as well as data from buoys on the icebergs. Registration of air temperature, buoy temperature, speed and size of the icebergs. The dataset is currently unavailable in any digital format. There are some documents available at the library of NPI in Tromsø: - IDAP 88: Vessel deployment cruise report 18 - 28 March 1988 Torgny Vinje & Hans Jensen - [IDAP 89 Lance deployment. 1, Cruise report / Hans Jensen and Torgny Vinje. Oslo : Norsk polarinstitutt, 1989. - 1 b. (flere pag.) : ill. -(Rapportserie / Norsk polarinstitutt ; 52)](https://brage.npolar.no/npolar-xmlui/handle/11250/173366) - IDAP 89 R/V Lance deployment. Volume 2, Field observations and analysis / Torgny Vinje ... [et al.]. - Oslo : Norsk Polarinstitutt, 1989. - IV, 73 s. : ill. - IDAP 89 Russian buoy deployment. Volume 1, Field observations and first period analysis / Ånund Sigurd Johnsen, Torgny Vinje. - Oslo : Norsk Polarinstitutt, 1990. - IV, 29 s. : ill. - IDAP 90 Russian Buoy Deployment : cruise report Torgny Vinje and Terje Brinck Løyning - IDAP 90 Analysis of Russian ice borders Torgny Vinje - IDAP 90 R/V Lance deployment Volume 2 : field observations and analysis Hans Jensen, Stig Magnar Løvås, Torgny Vinje and Terje Løyning - IDAP 90 Russian Buoy Deployment : field observations and analysis Aanund Sigurd Kvambekk, Terje Brinck Løyning and Torgny Vinje - IDAP 91 [R/V Lance deployment. 1, Cruise report / Hans Jensen, Stig Magnar Løvås, Terje Brinck Løyning. - Oslo : Norsk polarinstitutt, 1991. - II, 56 bl. (flere fold.) ; 30 cm. - (NP report ; 71)](https://brage.npolar.no/npolar-xmlui/handle/11250/173383) - IDAP 92 Eastern Barents Sea buoy deployment Volume 1 : cruise report Nikolay Doronin and Torgny Vinje - Iceberg extremal analysis / Yury Gudoshnikov, Alexey Naumov & Gennady Zubakin. - St.-Petersburg : EcoShelf, 1994. - I, 18 bl. : ill. Project supervisor: Nikolay Doronin for Torgny Vinje. Project client: Norsk polarinstitutt for OKN - IDAP. In addition, there were some talks about IDAB at the POAC 1993: http://www.poac.com/Papers/POAC93_V1_all.pdf (mostly from page 450). There is also the historic ice chart archive that is partly published hree: http://www.climate-cryosphere.org/resources/historical-ice-chart-archive/about Other parts are not digitalised. A summary (in Norwegian) can be found here: https://www.npolar.no/wp-content/uploads/2019/03/historisk-isgrensearkiv.pdf

The data associated with this entry have been obtained while working on a drift ice station occupied from 26 July to 3 August 2012 and initially situated at 82.5° N, 21° E north of Svalbard during the Centre for Ice, Climate and Ecosystem (ICE) cruise (22 July - 07 August 2012). The data set includes the following variables: chlrophyll a, particulate organic carbon and nitrogen, biomass estimates of ice algal aggregates, and species composition of ice algal aggregates. The main scientific findings are summarized below. During two consecutive cruises to the Eastern Central Arctic in late summer 2012, we observed floating algal aggregates in the melt-water layer below and between melting ice floes of first-year pack ice. The macroscopic (1-15 cm in diameter) aggregates had a mucous consistency and were dominated by typical ice-associated pennate diatoms embedded within the mucous matrix. Aggregates maintained buoyancy and accumulated just above a strong pycnocline that separated meltwater and seawater layers. We were able, for the first time, to obtain quantitative abundance and biomass estimates of these aggregates. Although their biomass and production on a square metre basis was small compared to ice-algal blooms, the floating ice-algal aggregates supported high levels of biological activity on the scale of the individual aggregate. In addition they constituted a food source for the ice-associated fauna as revealed by pigments indicative of zooplankton grazing, high abundance of naked ciliates, and ice amphipods associated with them. During the Arctic melt season, these floating aggregates likely play an important ecological role in an otherwise impoverished near-surface sea ice environment. Our findings provide important observations and measurements of a unique aggregate-based habitat during the 2012 record sea ice minimum year.

The data set presents keyed and translated from Norwegian daily observations of sea ice and icebergs conducted onboard research vessel “Norvegia” (D/S Norvegia) during its navigation around Antarctica in the austral summer of 1930-1931. The data covers the period of 20.10.1930 to 09.02.1931.

The file contains an inventory of the archive of slides with fossil marine planktic diatoms from a network of sediment cores and surface sediment samples, including core tops. The collection of slides was prepared in NPI over the period from 1980s to 2019. The slides are packed in 83 diatom slide boxes and placed in 2 larger cardboard boxes (flytteeske) and 2 smaller cardboard boxes. The inventory file for each sediment core/surface sample provides the information on the sample ID, sample position (depth) in a sediment core, number of slides prepared from this sample, solution concentration and the slide location in the archive. Metadata also lists coordinates for some of the cores and the respective publications where the data were used.

The dataset contains ship radar images with 1 min interval. Images cover the area of 15 * 15 km with nominal resolution of 12.5 m. The bow of the ship is always pointing to left. The images have been recorded with an independent radar server, developed by Image Soft Ltd. On the server, images have been pre-processed by temporal median filtering of 15-20 s. The image capturing is described in detail in Karvonen, 2016. Karvonen, J. (2016): [Virtual radar ice buoys – a method for measuring fine-scale sea ice drift](https://doi.org/10.5194/tc-10-29-2016), The Cryosphere, 10, 29–42. 

Incident and transmitted spectral irradiance from transects on ponded first year ice during the ICE12 expedition with RV Lance in 2012. Under ice irradiance was measured approximately every 1m along three different transects, incident surface irradiance was measured concurrently at a fixed location near the start of the transect. After irradiance measurements, ice thickness, freeboard and pond depth was measured every 1m along the transect.

The data set comprises a collection of 5 digital terrains models (DTMs) showing the sea ice surface topography for ponded first year ice during the 2012 July–August ICE12/ACCESS cruise north of Svalbard onboard R/V “Lance” in the southwestern Nansen Basin (82.3◦ N, 21.5◦ E). ICE12 drift north of Svalbard in July-August 2015. ICE12 featured an eight-day ice station, 26 July to 3 August 2012, in an area of very close, 9/10 concentration, drift ice. The ice floe that “Lance” was moored to during the drift had a diameter of approximately 600 m and a modal ice thickness of 0.8 m. The surface topography for 5 segments of ICE12 floe is derived using photogrammetry from the series of images acquired by ICE camera setup during survey flights on 28.07.2012 and 31.07.12. Data are presented on a regular 2 cm mesh in UTM coordinates and covers the areas from 11000 to 14000 m2 per segment . As an output formats the ascii XYZ table is used.

We performed measurements of carbon dioxide fugacity (fCO2) in the surface water under 8 Arctic sea ice from January to June 2015 during the Norwegian young sea ICE (N-ICE2015) expedition. Over 9 this period, the ship drifted with four different ice floes and covered the deep Nansen Basin, the slopes 10 north of Svalbard, and the Yermak Plateau. This unique winter-to-spring data set includes the first 11 winter-time under-ice water fCO2 observations in this region. The observed under-ice fCO2 ranged between 12 315 matm in winter and 153 matm in spring, hence was undersaturated relative to the atmospheric fCO2. 13 Although the sea ice partly prevented direct CO2 exchange between ocean and atmosphere, frequently 14 occurring leads and breakup of the ice sheet promoted sea-air CO2 fluxes. The CO2 sink varied between 0.3 15 and 86 mmol C m22 d21, depending strongly on the open-water fractions (OW) and storm events. The 16 maximum sea-air CO2 fluxes occurred during storm events in February and June. In winter, the main drivers 17 of the change in under-ice water fCO2 were dissolution of CaCO3 (ikaite) and vertical mixing. In June, in 18 addition to these processes, primary production and sea-air CO2 fluxes were important. The cumulative loss 19 due to CaCO3 dissolution of 0.7 mol C m22 in the upper 10 m played a major role in sustaining the 20 undersaturation of fCO2 during the entire study. The relative effects of the total fCO2 change due to CaCO3 21 dissolution was 38%, primary production 26%, vertical mixing 16%, sea-air CO2 fluxes 16%, and temperature 22 and salinity insignificant.

Laser leveling exercises with rotating laser were carried out during N-ICE 2015. The sea-ice and snow surface elevation were computed with reference to the local sea-surface found by drilling at the corners of the laser leveling field.

Bromoform (CHBr3) fluxes from sea ice measured with chamber technique