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1. The North Icelandic Jet and its relationship to the North Icelandic Irminger Current

   https://doi.org/10.1357/002224017822109505  

   Pickart, Robert S.; Spall, Michael A.; Torres, Daniel J.; Våge, Kjetil; Valdimarsson, Hedinn; Nobre, C.; Moore, G. W.; Jonsson, Steingrimur; Mastropole, Dana (September 2017, Journal of Marine Research)
2. Alongstream, seasonal and interannual variability of the North Icelandic Irminger Current and East Icelandic Current around Iceland

   Casanova-Masjoan, M; Perez-Hernandez, M; Pickart, R; Valdimarsson, H; Macrander, A; Velez-Belchi, P; Grisolia-Santos, D; Torres, D; Jonsson, S; Vage, K (January 2020, Journal of geophysical research)
3. Along‐Stream, Seasonal, and Interannual Variability of the North Icelandic Irminger Current and East Icelandic Current Around Iceland

   https://doi.org/10.1029/2020JC016283  

   Casanova‐Masjoan, M.; Pérez‐Hernández, M. D.; Pickart, R. S.; Valdimarsson, H.; Ólafsdóttir, S. R.; Macrander, A.; Grisolía‐Santos, D.; Torres, D. J.; Jónsson, S.; Våge, K.; et al (September 2020, Journal of Geophysical Research: Oceans)

   Abstract Data from repeat hydrographic surveys over the 25‐year period 1993 to 2017, together with satellite altimetry data, are used to quantify the temporal and spatial variability of the North Icelandic Irminger Current (NIIC), East Icelandic Current (EIC), and the water masses they advect around northern Iceland. We focus on the warm, salty Atlantic Water (AW) flowing northward through Denmark Strait and the cooler, fresher, denser Atlantic‐origin Overflow Water (AtOW) which has circulated cyclonically around the rim of the Nordic Seas before being advected to the Iceland slope via the EIC. The absolute geostrophic velocities reveal that approximately half of the NIIC recirculates just north of Denmark Strait, while the remaining half merges with the EIC to form a single current that extends to the northeast of Iceland, with no further loss in transport of either component. The AW percentage decreases by 75% over this distance, while the AtOW percentage is higher than that of the AW in the merged current. The NIIC and merged NIIC‐EIC are found to be baroclinically unstable, which causes the flow to become increasingly barotropic as it progresses around Iceland. A seasonal accounting of the water masses within the currents indicates that only in springtime is the NIIC dominated by AW inflow north of Denmark Strait. Overall, there is considerably more seasonal and along‐stream variability in the properties of the flow prior to the merging of the NIIC and EIC. Over the 25‐year time period, the NIIC became warmer, saltier, and increased in volume transport. 

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4. High-Frequency Variability in the North Icelandic Jet

   https://doi.org/10.1357/002224018824845910  

   Harden, B. E.; Pickart, R. S. (March 2018, Journal of Marine Research)

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5. High frequency variability in the North Icelandic Jet

   Harden, B.E.; Pickart, R.S. (April 2018, Journal of marine research)

   We describe the high-frequency variability in the North Icelandic Jet (NIJ) on the Iceland Slope using data from the densely instrumented Kögur mooring array deployed upstream of the Denmark Strait sill from September 2011 to July 2012. Significant sub-8-day variability is ubiquitous in all moorings from the Iceland slope with a dominant period of 3.6 days. We attribute this variability to topographic Rossby waves on the Iceland slope with a wavelength of 62 ± 3 km and a phase velocity of 17.3 ± 0.8 km/day−1 directed downslope (−9◦ relative to true-north). We test the theoretical dispersion relation for these waves against our observations and find good agreement between the predicted and measured direction of phase propagation. We additionally calculate a theoretical group velocity of 36 km day−1 directed almost directly up-slope (106◦ relative to true-north) that agrees well with the propagation speed and direction of observed energy pulses. We use an inverse wave tracing model to show that this wave energy is generated locally, offshore of the array, and does not emanate from the upstream or downstream directions along the Iceland slope. It is hypothesized that either the meandering Separated East Greenland Current located seaward of the NIJ or intermittent aspiration of dense water into the Denmark Strait Overflow are the drivers of the topographic waves. 

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