Results 161 to 170 of about 47,397 (267)

Lagrangian analysis of two flavours of Central European heatwaves: Formation under omega blocking versus initiation by subtropical ridges

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We investigate whether Central European heatwaves (HWs) forming under omega blocking differ from those enabled by subtropical ridges, in terms of both air‐mass origin and processes warming air parcels along their way. Using ERA5‐based backward trajectories and a Lagrangian temperature anomaly decomposition, we identify significant differences in the ...
Alexander Lemburg, Andreas H. Fink, Miguel M. Lima, Joaquim G. Pinto   +3 more
wiley   +1 more source

Ticks and tick-borne diseases in the northern hemisphere affecting humans. [PDF]

Front Microbiol
Boulanger N, Iijima H, Doi K, Watari Y, Kwak M, Nakao R, Wikel S.   +6 more
europepmc   +1 more source

Impact of data assimilation on Arctic sea‐ice thickness variability and its coupling with atmospheric forcing

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We document for the first time how the assimilation of CS2SMOS observations improves the model representation of Arctic sea‐ice thickness (SIT) and its variability: biases are reduced (top row), while excessive variability in the Beaufort Sea and lack of variability in the ice pack are both corrected (bottom row).
Jiping Xie, Yue Ying, Richard Davy, Laurent Bertino   +3 more
wiley   +1 more source

The asynchronous rise of Northern Hemisphere alpine floras reveals general responses of biotic assembly to orogeny and climate change. [PDF]

Sci Adv
Ding W, Ree RH, May MR, Brun P, Hagen O, Karger DN, Skeels A, Pellissier L, Xing Y, Zimmermann NE.   +9 more
europepmc   +1 more source

Forecast‐Error Diagnostics in Neural Weather Models

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Deep learning weather prediction models enable efficient forecast‐error diagnostics through auto‐differentiation and low computational cost. We apply grid‐point relaxation and gradient‐based error sensitivity to identify key forecast‐error sources. Results show that medium‐range forecasts in the midlatitudes benefit most from relaxing the stratosphere ...
Uroš Perkan, Gregor Skok, Žiga Zaplotnik   +2 more
wiley   +1 more source

Human-induced changes in extreme cold surges across the Northern Hemisphere. [PDF]

Nat Commun
Nie Y, Sun Y, Zhang X, Chen G.
europepmc   +1 more source

Ensemble reliability and the signal‐to‐noise paradox in ECMWF subseasonal forecasts

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We derive a general expression for the ratio of predictable components (RPC) in terms of correlation, spread–error ratio, and total variance ratio. Physical constraints on the admissible solutions (i.e., real‐valued and non‐negative variances) provide a mechanism to identify statistically paradoxical sample combinations of reliability and correlation ...
Christopher D. Roberts, Frederic Vitart
wiley   +1 more source

Determining the cause of inconsistent onset-season trends in the Northern Hemisphere snow cover extent record. [PDF]

Sci Adv
Elias Chereque A, Kushner PJ, Mudryk L, Derksen C.   +3 more
europepmc   +1 more source

Spatial observation‐error correlations for AMSU‐A in all‐sky assimilation: An ECMWF and UK Met Office intercomparison

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Assimilation of AMSU‐A all‐sky observations can be increased up to fivefold if spatial observation‐error correlations are accounted for properly. New correlation estimates derived using data from ECMWF and the UK Met Office reveal that correlation length‐scales are between 75 and 150 km for AMSU‐A channels peaking in the troposphere. This is attributed
Rishabh Bhatt, Massimo Bonavita, Niels Bormann, Sarah L. Dance, Alison Fowler, Elías Hólm, Christopher J. Merchant, Jonathan Mittaz, Stuart Newman, Joanne Waller   +9 more
wiley   +1 more source

Volumetric quantifications and dynamics of areas undergoing retrogressive thaw slumping in the Northern Hemisphere. [PDF]

Nat Commun
Dai C, Ward Jones MK, van der Sluijs J, Nesterova N, Howat IM, Liljedahl AK, Higman B, Freymueller JT, Kokelj SV, Sriram S.   +9 more
europepmc   +1 more source