Flow regimes in the winter stratosphere of the northern hemisphere by Gray, L, Sparrow, S, Juckes, M, O'Neil, A, Andrews, D

“…A stratosphere-mesosphere model is used to investigate the response of the northern-hemisphere stratospheric flow regime to changes in tropospheric wave forcing and equatorial wind direction. …”

A tropical mechanism for Northern Hemisphere deglaciation by Rodgers, K, Lohmann, G, Lorenz, S, Schneider, R, Henderson, G

“…This implies that tropical SSTs could play a more important role in melting ice sheets in the Northern Hemisphere than in reforming them, possibly providing a mechanism which could help to explain the rapidity of deglaciation relative to glacial inception. © 2003 by the American Geophysical Union.…”

Exploring recent trends in Northern Hemisphere blocking by Barnes, E, Dunn-Sigouin, E, Masato, G, Woollings, T

“…Observed blocking trends are diagnosed to test the hypothesis that recent Arctic warming and sea ice loss has increased the likelihood of blocking over the Northern Hemisphere. To ensure robust results, we diagnose blocking using three unique blocking identification methods from the literature, each applied to four different reanalyses. …”

Solar forcing of winter climate variability in the Northern Hemisphere by Ineson, S, Scaife, A, Knight, JR, Manners, J, Dunstone, N, Gray, L, Haigh, J

Dynamical differences between short and long blocks in the Northern Hemisphere by Drouard, M, Woollings, T, Sexton, DMH, McSweeney, CF

Winter and Summer Northern Hemisphere Blocking in CMIP5 Models by Masato, G, Hoskins, B, Woollings, T

Simulations of stratospheric flow regimes during northern hemisphere winter by Sparrow, SN, Gray, L, Juckes, M, O'Neill, A, Andrews, D

“…The interaction of the solar influence and the Quasi-Biennial Oscillation (QBO) on the northern hemisphere winter circulation and temperatures is investigated. …”

The Effect of Climate Change on the Variability of the Northern Hemisphere Stratospheric Polar Vortex by Mitchell, D, Osprey, S, Gray, L, Butchart, N, Hardiman, S, Ciarlton-Perez, A, Watson, P

Implications of changes in the Northern Hemisphere circulation for the detection of anthropogenic climate change by Gillett, N, Hegerl, G, Allen, M, Stott, P

“…The first principal component of Northern Hemisphere sea level pressure, known as the Arctic Oscillation (AO) index, has increased significantly in recent winters, and this change is associated with ~30% of Northern Hemisphere January-March warming. …”

SOME COMPARISONS BETWEEN THE MIDDLE ATMOSPHERE DYNAMICS OF THE SOUTHERN AND NORTHERN HEMISPHERES by Andrews, D

Factors influencing the seasonal predictability of northern hemisphere severe winter storms by Hansen, F, Kruschke, T, Greatbatch, RJ, Weisheimer, A

“…We investigate the role of the tropics, the stratosphere, and atmosphere‐ocean coupling for seasonal forecasts of strong, potentially damaging, Northern Hemisphere extratropical winter wind storm frequencies. …”

The representation of winter Northern Hemisphere atmospheric blocking in the ECMWF seasonal prediction systems by Davini, P, Weisheimer, A, Balmaseda, M, Johnson, SJ, Molteni, F, Roberts, CD, Senan, R, Stockdale, TN

“…The simulation and prediction of winter Northern Hemisphere atmospheric blocking in the seasonal prediction systems from the European Centre for Medium‐Range Weather Forecasts (ECMWF) is analysed. …”

The role of the tropical West Pacific in the extreme northern hemisphere winter of 2013/14 by Watson, P, Weisheimer, A, Knight, J, Palmer, T

“…We find that seasonal forecasts with the tropical atmosphere relaxed towards a reanalysis give 2013/14 winter-mean anomalies with strong similarities to those observed in the Northern Hemisphere, indicating that low-latitude anomalies had a role in the development of the extremes. …”

Projections of northern hemisphere extratropical climate underestimate internal variability and associated uncertainty by O’Reilly, CH, Befort, DJ, Weisheimer, A, Woollings, T, Ballinger, A, Hegerl, G

The search for muon neutrinos from northern hemisphere gamma-ray bursts with amanda by Achterberg, A, Ackermann, M, Adams, J, Ahrens, J, Andeen, K, Auffenberg, J, Bahcall, J, Bai, X, Baret, B, Barwick, S, Bay, R, Beattie, K, Becka, T, Becker, J, Becker, K, Berghaus, P, Berley, D, Bernardini, E, Bertrand, D, Besson, D, Blaufuss, E, Boersma, D, Bohm, C, Bolmont, J, Boeser, S

“…We present the results of the analysis of neutrino observations by the Antarctic Muon and Neutrino Detector Array (AMANDA) correlated with photon observations of more than 400 gamma-ray bursts (GRBs) in the northern hemisphere from 1997 to 2003. During this time period, AMANDA'S effective collection area for muon neutrinos was larger than that of any other existing detector. …”

Assessing the robustness of multidecadal variability in Northern Hemisphere wintertime seasonal forecast skill by O'Reilly, CH, Weisheimer, A, MacLeod, D, Befort, DJ, Palmer, T

“…Recent studies have found evidence of multidecadal variability in northern hemisphere wintertime seasonal forecast skill. …”

Changes in Northern Hemisphere stratospheric variability under increased CO2 concentrations by Bell, C, Gray, L, Kettleborough, J

“…Equilibrium climate change simulations employing forcing of two and four times pre-industrial CO2 are presented, with particular focus on the temperature response of the Arctic lower stratosphere during Northern Hemisphere winter. High CO2 loading provides the ability to attain the statistical significance of any response, typically a problem given the large component of interannual variability common to the region. …”

Low frequency nonlinearity and regime behavior in the northern hemisphere extra-tropical atmosphere by Hannachi, A, Straus, D, Franzke, C, Corti, S, Woollings, T

Evidence from U-Th dating against Northern Hemisphere forcing of the penultimate deglaciation by Henderson, G, Slowey, N

“…Milankovitch proposed that summer insolation at mid-latitudes in the Northern Hemisphere directly causes the ice-age climate cycles. …”

Variability in seasonal forecast skill of Northern Hemisphere winters over the 20th century by O'Reilly, C, Heatley, J, MacLeod, D, Weisheimer, A, Palmer, T, Schaller, N, Woollings, T

“…Seasonal hindcast experiments, using prescribed SSTs, are analysed for Northern Hemisphere winters from 1900-2010. Ensemble mean Pacific/North American index (PNA) skill varies dramatically, dropping towards zero during the mid-twentieth century, with similar variability in North Atlantic Oscillation (NAO) hindcast skill. …”