Results 51 to 60 of about 170 (87)

Effects of Orography on the High-Temperature Event on 22 June 2023 in North China

Atmosphere
An extreme high-temperature event occurred in North China on 22 June 2023, with the maximum temperature reaching 41.8 °C. The high-temperature centers preferentially occurred at the foothills of the Taihang and Yanshan Mountains, indicating an important ...
Haoyang Wu, Xin Xu, Yuan Wang
doaj   +1 more source

Distinct El Niño Flavors and SAM Variability Modulate Surface Melt Over the Ross Ice Shelf

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.
Abstract Our study investigates how different flavors of El Niño, centered on the Eastern Pacific (EP) and Central Pacific (CP), and their interaction with the Southern Annular Mode (SAM) modulate surface melt events over the Ross Ice Shelf (RIS). Using satellite‐based melt observations, ERA5 reanalysis, high‐resolution regional model simulations, and ...
Sanjiban Dutta, Pranab Deb, Ruth Mottram, Nicolaj Hansen   +3 more
wiley   +1 more source

225 Jahre UV‐Strahlung – Die Rekonstruktion des Ritter‐Experiments (1801) für Schule und Hochschule

CHEMKON, Volume 33, Issue 4, Page 107-113, July 2026.
Am 22. Februar 1801 gelang Johann Wilhelm Ritter in Jena der experimentelle Nachweis einer unsichtbaren Strahlung jenseits des violetten Bereichs des sichtbaren Spektrums. Als Indikator nutzte er die photochemische Schwärzung von Hornsilber (Silberchlorid) und erbrachte damit erstmals einen indirekten experimentellen Nachweis der ultravioletten ...
Tom Wagner, Holger Cartarius, Timo Mappes   +2 more
wiley   +1 more source

Decadal Changes of UV Aerosol Optical Depth in Hobart, Australia Measured With a Brewer MKIII: Relationship to Bushfire Events and Climate Indices

International Journal of Climatology, Volume 46, Issue 9, July 2026.
Monthly average aerosol optical depth at 320 nm obtained with a Brewer MKIII spectrophotometer for Hobart, Australia (42.8806° S, 147.3250° E) over a 21‐year period. There is a linear trend of 15.4% per decade. There are 9 months when the average aerosol optical depth exceeds twice the monthly standard deviation.
Manuel Nuñez, Antonio Serrano, Peter Love, Nels Larson   +3 more
wiley   +1 more source

Near‐Surface Air Temperature Measurements: Contribution to the Overall Uncertainty due to Wind Speed and Relative Humidity

Meteorological Applications, Volume 33, Issue 4, July/August 2026.
This work evaluates the uncertainties on air temperature measurements from ground‐based stations under real environmental conditions, addressing the environment effects component, required by the World Meteorological Organisation to include in the overall measurement uncertainty.
Natali Giselle Aranda, Alberto Bottacin, Graziano Coppa, Chiara Musacchio, Andrea Merlone   +4 more
wiley   +1 more source

Suggestions for unifying the parametrizations of turbulent orographic form drag, mountain wave drag, and flow blocking

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 778, July 2026 Part A.
A theory for the interaction between a boundary layer and a low mountain is used to provide estimates of the turbulent orographic form drag, upward‐propagating mountain gravity‐wave drag, and trapped lee‐wave drag (case shown in the figure). After reviewing briefly how these processes are represented in weather and climate models, we propose a ...
Francois Lott, Anton Beljaars, Bruno Deremble   +2 more
wiley   +1 more source

Observations and numerical simulations of a valley‐exit wind in the Alpine Bolzano basin

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 779, July 2026 Part B.
The evolution and spreading of the nocturnal valley‐exit wind flowing from the Isarco Valley into the Bolzano basin, in the Italian Alps, are found to be influenced by the basin temperature stratification. Measurements and high‐resolution simulations show that a cold‐air pool favors an upward trajectory of the flow at the exit of the valley.
Federica Gucci, Andrea Zonato, Marco Falocchi, Dino Zardi, Lorenzo Giovannini   +4 more
wiley   +1 more source

Spatial evolution of foehn flows in the Rhine Valley area: quantification using high resolution simulations

Meteorologische Zeitschrift, 2004
The Rhine valley was one target area chosen during the Mesoscale Alpine Programme (MAP) field experiment to study Foehn flows. The dense data set available has allowed the computation and validation of high resolution simulations.
Guillaume Beffrey, Geneviève Jaubert, Alain Dabas   +2 more
doaj   +1 more source

Numerical simulation of mesoscale structures in the northern Alpine foreland during front passages: A dry cold front with pre-frontal foehn

Meteorologische Zeitschrift, 1992
A three-dimensional numerical model is used to simulate the passage of a cold front with pre-frontal foehn over the northern Alpine foreland. A passive nesting scheme allows a detailed inspection of mesoscale patterns in southern Bavaria. The results are
D. Heimann
doaj   +1 more source

Numerical simulation of mesoscale structures in the northern alpine foreland during front passages: A precipitating cold front without pre-frontal foehn

Meteorologische Zeitschrift, 1993
Supplementing a previous study of a dry cold front with pre-frontal foehn (Heimann 1992c) this paper documents the numerical simulation of a precipitating cold front approaching the Alps from northwest without pre-frontal foehn.
Dietrich Heimann
doaj   +1 more source