Search Results - "WERNLI, H"

The LAGRANTO Lagrangian analysis tool – version 2.0 by Sprenger, M, Wernli, H

“…Lagrangian trajectories are widely used in the atmospheric sciences, for instance to identify flow structures in extratropical cyclones (e.g., warm conveyor…”
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Quantifying the relevance of atmospheric blocking for co-located temperature extremes in the Northern Hemisphere on (sub-)daily time scales by Pfahl, S., Wernli, H.

“…Atmospheric blocking can influence near‐surface temperature via circulation and radiative forcing. This study investigates the relevance of blocking for…”
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A global climatology of stratosphere–troposphere exchange using the ERA-Interim data set from 1979 to 2011 by Å kerlak, B, Sprenger, M, Wernli, H

“…In this study we use the ERA-Interim reanalysis data set from the European Centre for Medium-Range Weather Forecasts (ECMWF) and a refined version of a…”
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Interannual variability of Greenland winter precipitation sources: Lagrangian moisture diagnostic and North Atlantic Oscillation influence by Sodemann, H., Schwierz, C., Wernli, H.

“…We present a new Lagrangian diagnostic for identifying the sources of water vapor for precipitation. Unlike previous studies, the method allows for a…”
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Importance of latent heat release in ascending air streams for atmospheric blocking by Pfahl, S., Schwierz, C., Croci-Maspoli, M., Grams, C. M., Wernli, H.

“…Atmospheric blocking can contribute to extreme weather events. A Lagrangian approach applied to reanalysis data shows that a large fraction of air masses are…”
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Influence of microphysical processes on the potential vorticity development in a warm conveyor belt: a case-study with the limited-area model COSMO by Joos, H., Wernli, H.

“…The potential vorticity (PV) in warm conveyor belts (WCBs) is strongly influenced by the latent heating associated with the various microphysical processes…”
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Deuterium excess as a proxy for continental moisture recycling and plant transpiration by Aemisegger, F, Pfahl, S, Sodemann, H, Lehner, I, Seneviratne, S. I, Wernli, H

“…Studying the evaporation process and its link to the atmospheric circulation is central for a better understanding of the feedbacks between the surface water…”
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Comparison of Eulerian and Lagrangian moisture source diagnostics – the flood event in eastern Europe in May 2010 by Winschall, A, Pfahl, S, Sodemann, H, Wernli, H

“…Moisture convergence from different sources is an important prerequisite for a heavy-precipitation event. The contributions from different source regions can,…”
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Aerosol- and updraft-limited regimes of cloud droplet formation: influence of particle number, size and hygroscopicity on the activation of cloud condensation nuclei (CCN) by Reutter, P., Su, H., Trentmann, J., Simmel, M., Rose, D., Gunthe, S. S., Wernli, H., Andreae, M. O., Pöschl, U.

“…We have investigated the formation of cloud droplets under pyro-convective conditions using a cloud parcel model with detailed spectral microphysics and with…”
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Atmospheric processes triggering the central European floods in June 2013 by Grams, C. M, Binder, H, Pfahl, S, Piaget, N, Wernli, H

“…In June 2013, central Europe was hit by a century flood affecting the Danube and Elbe catchments after a 4 day period of heavy precipitation and causing severe…”
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Isotope meteorology of cold front passages: A case study combining observations and modeling by Aemisegger, F., Spiegel, J. K., Pfahl, S., Sodemann, H., Eugster, W., Wernli, H.

“…This study investigates the role of below‐cloud evaporation and evapotranspiration for the short‐term variability of stable isotopes in near‐surface water…”
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Investigations of Mesoscopic Complexity of Small Ice Crystals in Midlatitude Cirrus by Järvinen, E., Wernli, H., Schnaiter, M.

“…During the Mid‐Latitude CIRRUS campaign small (<50 μm) ice crystals were characterized for their mesoscopic complexity using the Small Ice Detector Mk. 3. It…”
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Increase in the number of extremely strong fronts over Europe? A study based on ERA‐Interim reanalysis (1979–2014) by Schemm, S., Sprenger, M., Martius, O., Wernli, H., Zimmer, M.

“…Evidence is presented that the frequency of extremely strong fronts, which occur mainly in summer, has increased over Europe in ERA‐Interim reanalyses data…”
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The role of upper‐level dynamics and surface processes for the Pakistan flood of July 2010 by Martius, O., Sodemann, H., Joos, H., Pfahl, S., Winschall, A., Croci‐Maspoli, M., Graf, M., Madonna, E., Mueller, B., Schemm, S., Sedláček, J., Sprenger, M., Wernli, H.

“…In July and August 2010 floods of unprecedented impact afflicted Pakistan. The floods resulted from a series of intense multi‐day precipitation events in July…”
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Climatology of potential vorticity streamers and associated isentropic transport pathways across PV gradient barriers by Kunz, A., Sprenger, M., Wernli, H.

“…The European Centre for Medium‐Range Weather Forecasts reanalysis product ERA‐Interim from 1979 to 2011 is used to investigate potential vorticity (PV)…”
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The isotopic composition of precipitation from a winter storm – a case study with the limited-area model COSMOiso by K. Yoshimura, H. Wernli, S. Pfahl

“…Stable water isotopes are valuable tracers of the atmospheric water cycle, and potentially provide useful information also on weather-related processes. In…”
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The complex life cycles of two long‐lived potential vorticity cut‐offs over Europe by Portmann, R., Crezee, B., Quinting, J., Wernli, H.

“…Potential vorticity (PV) cut‐offs are stratospheric air masses separated from the circumpolar stratospheric reservoir on an isentropic surface. They typically…”
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Impact of North Atlantic evaporation hot spots on southern Alpine heavy precipitation events by Winschall, A., Pfahl, S., Sodemann, H., Wernli, H.

“…This study investigates transient events of intense ocean evaporation with an amplitude exceeding 250 W m−2, a duration of a few days, and a spatial extent of…”
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ATMOSPHERIC RIVERS EMERGE AS A GLOBAL SCIENCE AND APPLICATIONS FOCUS by Ralph, F. M., Dettinger, M., Lavers, D., Gorodetskaya, I. V., Martin, A., Viale, M., White, A. B., Oakley, N., Rutz, J., Spackman, J. R., Wernli, H., Cordeira, J.

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Tropical troposphere-to-stratosphere transport inferred from trajectory calculations by Fueglistaler, S., Wernli, H., Peter, T.

“…We present an analysis of trajectory calculations in the tropical tropopause layer (TTL) based on European Centre for Medium‐Range Weather Forecasts (ECMWF)…”
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