Blar i Bergen Open Research Archive på tidsskrift "Quarterly Journal of the Royal Meteorological Society"
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Assessing North Atlantic winter climate response to geomagnetic activity and solar irradiance variability
(Peer reviewed; Journal article, 2019)Recent studies suggest a response in the North Atlantic winter circulation which lags by a couple of years with respect to sunspot maximum. This has been explained by two different top‐down mechanisms: a solar wind driven ... -
Characteristics of cyclones following different pathways in the Gulf Stream region
(Journal article; Peer reviewed, 2021)The Northwest Atlantic is a region of strong temperature gradients and hence is a favourable location for wintertime cyclone intensification co-located with the storm track. The temperature gradient is associated with both ... -
Cyclone Intensification in the Kuroshio Region and its relation to the Sea Surface Temperature Front and Upper‐Level Forcing
(Journal article; Peer reviewed, 2021)The Northwest Pacific features strong sea surface temperature (SST) gradients providing favourable conditions for wintertime cyclone intensification in the midlatitudes. To estimate the relative contribution of the SST ... -
Dynamics of concurrent and sequential Central European and Scandinavian heatwaves
(Journal article; Peer reviewed, 2020)In both 2003 and 2018 a heatwave in Scandinavia in July was followed by a heatwave in Central Europe in August. Whereas the transition occurred abruptly in 2003, it was gradual in 2018 with a 12-day period of concurrent ... -
An evaluation of surface meteorology and fluxes over the Iceland and Greenland Seas in ERA5 reanalysis: The impact of sea ice distribution
(Journal article; Peer reviewed, 2021)The Iceland and Greenland Seas are a crucial region for the climate system, being the headwaters of the lower limb of the Atlantic Meridional Overturning Circulation. Investigating the atmosphere–ocean–ice processes in ... -
The impact of ensemble filter definition on the assimilation of temperature profiles in the tropical Pacific
(Journal article; Peer reviewed, 2005-10)The traditional analysis scheme in the Ensemble Kalman Filter (EnKF) uses a stochastic perturbation or randomization of the measurements which ensures a correct variance in the updated ensemble. An alternative so called ... -
The Influence of large convective eddies on the surface-layer turbulence
(Journal article; Peer reviewed, 2006-06)Close to the surface large coherent eddies consisting of plumes and downdraughts cause convergent winds blowing towards the plume axes, which in turn cause wind shears and generation of turbulence. This mechanism strongly ... -
Large‐scale regional model biases in the extra‐tropical North Atlantic storm track and impacts on downstream precipitation
(Peer reviewed; Journal article, 2019)Global climate models have circulation biases that the community aims to reduce, for instance through high‐resolution dynamical downscaling. We used the Weather Research and Forecasting model (WRF) to downscale both ... -
The link between eddy-driven jet variability and weather regimes in the North Atlantic-European sector
(Peer reviewed; Journal article, 2017-10)This study reconciles two perspectives on wintertime atmospheric variability in the North Atlantic–European sector: the zonal‐mean framework comprising three preferred locations of the eddy‐driven jet (southern, central, ... -
Resistance and heat-transfer laws for stable and neutral planetary boundary layers: old theory advanced and re-evaluated
(Journal article; Peer reviewed, 2005-07)The planetary boundary layer (PBL) resistance and heat-transfer laws express the surface fluxes of momentum and heat through the PBL governing parameters. Since the late sixties, the dimensionless coefficients (A, B and ... -
Unravelling the March 1972 northwest Greenland windstorm with high-resolution numerical simulations
(Peer reviewed; Journal article, 2019-08-07)Thule Air Base in northwest Greenland experienced an extreme windstorm during the night of 8/9 March 1972. The event is not among official WMO records because the anemometer broke after recording the highest gust of 93 m s−1. ...