102,061 research outputs found
Lenderink (R. S. G.), Siebrand (J. C.) - A Disequilibrium Analysis of the Labour Market.
No full textBerthomieu Claude. Lenderink (R. S. G.), Siebrand (J. C.) - A Disequilibrium Analysis of the Labour Market.. In: Revue économique, volume 29, n°5, 1978. pp. 960-961
RACMO regional climate model data, postprocessed for winter precipitation and winter temperature
No full textThis contains statistics of winter precipitation and winter temperature derived from the 16 model ensemble by RACMO2. In addition to the GCM driven runs, also a PGW (pseudo global warming) set is given. Data is used for a paper to be submitted.
Reference on the RACMO2 runs: Aalbers EE, Lenderink G, van Meijgaard E, van den Hurk BJJM (2018) Local-scale changes in mean and heavy precipitation in Western Europe, climate change or internal variability? Climate Dynamics 50:4745–4766. https://doi.org/10.1007/s00382-017-3901-
Temperature-extreme precipitation scaling: a two-way causality?
No full textExtreme precipitation events are widely thought to intensify in a warmer atmosphere through the Clausius-Clapeyron equation. The temperature-extreme precipitation scaling was proposed to analyse the temperature dependency of short-duration extreme precipitation and since then, the concept has been widely used in climatology. Bao et al. (2017) suggest that the apparent scaling reflects not only how surface air properties affect extreme precipitation, but also reflects how synoptic conditions and localized cooling due to the storm itself affect the scaling – implying two-way causality. We address here critical issues of this paper and provide evidence that dew point temperature drives extreme precipitation, with the direction of causality reversed only for the storm’s peak intensity. This physical inference may serve as a basis to better quantify scaling rates and to help establish the relationship between extreme precipitation and environmental conditions in the current climate, and thereby provide insights into future changes to precipitation extremes due to climate change.R. Barbero, S. Westra, G. Lenderink and H.J. Fowle
Robust assessment of future changes in extreme precipitation over the Rhine basin using a GCM
No full textEstimates of future changes in extremes of multiday precipitation sums are critical for estimates of future discharge extremes of large river basins. Here we use a large ensemble of global climate model SRES A1b scenario simulations to estimate changes in extremes of 1–20 day precipitation sums over the Rhine basin, projected for the period 2071–2100 with reference to 1961–1990. <br><br> We find that in winter, an increase of order 10%, for the 99th percentile precipitation sum, is approximately fixed across the selected range of multiday sums, whereas in summer, the changes become increasingly negative as the summation time lengthens. Explanations for these results are presented that have implications for simple scaling methods for creating time series of a future climate. We show that the dependence of quantile changes on summation time is sensitive to the ensemble size and indicate that currently available discharge estimates from previous studies are based on insufficiently long time series
Extreme convective precipitation events in a changing climate
No full textAs I am writing this, parts of Central Europe are plagued by a series of intense rainfall events that, in less than two days, turn rivers into powerful streams, cause flooding, damage infrastructure and property, and harm people. The number of such extreme events, which are associated with high economic losses and casualties, has been increasing for decades. How is this happening? And, what is the relation between extreme convective precipitation events and increasing temperatures, such as which we are currently experiencing due to climate change?To tackle these questions, consider the following simplified version of a convective rain event. We imagine a column of air, a part of the atmosphere with a cloud inside of it. Near the surface, air streams into the column where it starts rising vertically. While gaining height, the air cools, until at a certain level the contained water vapor will condensate in the formof small cloud droplets. From this level, the cloud base, the air mass continues ascending while the amount of condensed water keeps increasing, so that the cloud droplets grow in size. Finally, when they grow sufficiently large, precipitation will set in, and, in the most extreme case, all the cloud water will reach the ground as rain. Following this conceptual model, one way to increase the amount of precipitation is to increase the moisture content of the air that enters the cloud.Atmospheric Remote Sensin
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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3346: Samuel G. Freedman, author, 2013
No full textPhotograph of author Samuel G. Freedman, at NT Daily Slash meeting in the Mayborn School of Journalism at UNT
Convective extreme precipitation at midlatitudes
No full textAtmospheric PhysicsAtmospheric Remote Sensin
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