Blar i Geophysical Institute på tidsskrift "Weather and Climate Dynamics (WCD)"
Viser treff 1-16 av 16
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Circulation responses to surface heating and implications for polar amplification
(Journal article; Peer reviewed, 2024)A seminal study by Hoskins and Karoly (1981) explored the atmospheric circulation response to tropospheric heating perturbations at low latitudes and midlatitudes. Here we revisit and extend their study by investigating ... -
Diabatic effects on the evolution of storm tracks
(Journal article; Peer reviewed, 2023)Despite the crucial role of moist diabatic processes in mid-latitude storm tracks and related model biases, we still lack a more complete theoretical understanding of how diabatic processes affect the evolution of storm ... -
Dynamical drivers of Greenland blocking in climate models
(Journal article; Peer reviewed, 2021)Blocking over Greenland is known to lead to strong surface impacts, such as ice sheet melting, and a change in its future frequency can have important consequences. However, as previous studies demonstrated, climate models ... -
Front–orography interactions during landfall of the 1992 New Year's Day Storm
(Journal article; Peer reviewed, 2020)Although following a common synoptic evolution for this region, the 1992 New Year's Day Storm was associated with some of the strongest winds observed along the Norwegian west coast. The narrow wind band along its bent-back ... -
High-resolution stable isotope signature of a land-falling atmospheric river in southern Norway
(Journal article; Peer reviewed, 2021)Heavy precipitation at the west coast of Norway is often connected to elongated meridional structures of high integrated water vapour transport known as atmospheric rivers (ARs). Here we present high-resolution measurements ... -
Identifying quasi-periodic variability using multivariate empirical mode decomposition: a case of the tropical Pacific
(Journal article; Peer reviewed, 2023)A variety of statistical tools have been used in climate science to gain a better understanding of the climate system's variability on various temporal and spatial scales. However, these tools are mostly linear, stationary, ... -
Intermittency of Arctic–mid-latitude teleconnections: stratospheric pathway between autumn sea ice and the winter North Atlantic Oscillation
(Journal article; Peer reviewed, 2020)There is an observed relationship linking Arctic sea ice conditions in autumn to mid-latitude weather the following winter. Of interest in this study is a hypothesized stratospheric pathway whereby reduced sea ice in the ... -
Metrics of the Hadley circulation strength and associated circulation trends
(Journal article; Peer reviewed, 2022)This study compares trends in the Hadley cell (HC) strength using different metrics applied to the ECMWF ERA5 and ERA-Interim reanalyses for the period 1979–2018. The HC strength is commonly evaluated by metrics derived ... -
Model-simulated hydroclimate in the East Asian summer monsoon region during past and future climate: a pilot study with a moisture source perspective
(Journal article; Peer reviewed, 2023)Here we present a pilot study of the sensitivity of summer monsoon precipitation in the Yangtze River Valley (YRV; 110–122∘ E and 27–33∘ N, eastern China) to climatic boundary conditions from the Last Glacial Maximum (LGM), ... -
Polar lows – moist-baroclinic cyclones developing in four different vertical wind shear environments
(Journal article; Peer reviewed, 2021)Polar lows are intense mesoscale cyclones that develop in polar marine air masses. Motivated by the large variety of their proposed intensification mechanisms, cloud structure, and ambient sub-synoptic environment, we use ... -
Reconciling conflicting evidence for the cause of the observed early 21st century Eurasian cooling
(Journal article; Peer reviewed, 2023)It is now well established that the Arctic is warming at a faster rate than the global average. This warming, which has been accompanied by a dramatic decline in sea ice, has been linked to cooling over the Eurasian ... -
Reconstructing winter climate anomalies in the Euro-Atlantic sector using circulation patterns
(Journal article; Peer reviewed, 2021)The efficacy of Euro-Atlantic circulation regimes for estimating wintertime climate anomalies (precipitation and surface temperature) over Europe is assessed. A comparison of seasonal climate reconstructions from two ... -
Relative importance of tropopause structure and diabatic heating for baroclinic instability
(Journal article; Peer reviewed, 2021)Misrepresentations of wind shear and stratification around the tropopause in numerical weather prediction models can lead to errors in potential vorticity gradients with repercussions for Rossby wave propagation and ... -
Resampling of ENSO teleconnections: accounting for cold-season evolution reduces uncertainty in the North Atlantic
(Journal article; Peer reviewed, 2021)We re-examine the uncertainty of the El Niño–Southern Oscillation (ENSO) teleconnection to the North Atlantic following the investigation of Deser et al. (2017) (DES2017). Our analyses are performed on the November–December ... -
The role of Rossby waves in polar weather and climate
(Journal article; Peer reviewed, 2023)Recent Arctic warming has fuelled interest in the weather and climate of the polar regions and how this interacts with lower latitudes. Several interesting theories of polar-midlatitude linkages involve Rossby wave propagation ... -
WCD Ideas: Teleconnections through weather rather than stationary waves
(Journal article; Peer reviewed, 2024)Conventionally, teleconnections in the atmosphere are described by correlations between monthly mean fields. These correlations are supposedly caused by stationary Rossby waves. The main hypothesis explored in this idea ...