Results 181 to 190 of about 295 (207)
Some of the next articles are maybe not open access.
The role of forest cover and valley geometry in cold‐air pool evolution
Journal of Geophysical Research D: Atmospheres, 2015AbstractThis study utilizes a version of the Advanced Regional Prediction System (ARPS) with a canopy submodel (ARPS‐CANOPY) to evaluate the sensitivity of cold‐air pool evolution to forest canopy density and valley geometry and elucidate the underlying processes.
Shiyuan Zhong, Michael Kiefer
exaly +2 more sources
Seasonal changes in the cold-air pool formation in a subalpine hollow, central Japan
International Journal of Climatology, 2000An observational study has been conducted into the seasonal characteristics of the cold-air pool formation in a hollow in the subalpine area of the Yatsugatake Range during the warm seasons from 1995 through to 1997. The uniqueness of the present study is a detection of seasonal differences in the formation processes based on a 3-year observation.
Yoshihiro Iijima
exaly +2 more sources
A novel meteorological method to classify wintertime cold-air pool events
Atmospheric Environment, 2021Abstract Cold-air pools (CAPs) are common in mountain valleys throughout the world (e.g., western North America, Himalayas, Alps, etc.) during winter months. Weak surface winds, cold temperatures, high humidity, and snow cover presence are common characteristics of CAPs, and in populated areas there is an increase in air pollution concentrations ...
Sean Colgan, Xia Sun, Heather A. Holmes
openaire +1 more source
Quarterly Journal of the Royal Meteorological Society, 2019
Idealized two‐dimensional simulations have been used to examine the dependence of valley cold‐air pool (CAP) behaviour, morphology and duration (persistence) on terrain scale. The simulations use terrain of constant aspect ratio but ranging from modest to Alpine scale, under midlatitude winter conditions with a finite background flow and incorporating ...
openaire +1 more source
Idealized two‐dimensional simulations have been used to examine the dependence of valley cold‐air pool (CAP) behaviour, morphology and duration (persistence) on terrain scale. The simulations use terrain of constant aspect ratio but ranging from modest to Alpine scale, under midlatitude winter conditions with a finite background flow and incorporating ...
openaire +1 more source
Meteorological Events Affecting Cold-Air Pools in a Small Basin
Journal of Applied Meteorology and Climatology, 2011AbstractMeteorological events affecting the evolution of temperature inversions or cold-air pools in the 1-km-diameter, high-altitude (~1300 m MSL) Grünloch basin in the eastern Alps are investigated using data from lines of temperature dataloggers running up the basin sidewalls, nearby weather stations, and weather charts.
Manfred Dorninger +5 more
openaire +1 more source
The dynamics of persistent cold-air pool breakup
2014The wind-induced disruption and breakup of multiday cold-air pools are investigated using observational analyses and idealized numerical simulations. The observations are from the Persistent Cold-Air Pool (CAP) Study, which provides modern measurement of the meteorological processes affecting the duration of cold-air pools in the Salt Lake Valley of ...
openaire +1 more source
Quantification of the cold‐air pool in Kevo Valley, Finnish Lapland
Weather, 2009The ponding of cold air at low elevations is a major feature of the high-latitude climates of the Arctic, wherever low solar angles combine with incised topography. In Finnish Lapland this cold-air accumulation is critical for flora and fauna (Tenow and Nilssen, 1990; Virtanen et al., 1998) since absolute minimum temperatures control the survival of ...
Pepin, Nick +2 more
openaire +2 more sources
ICON Model Evaluation: A Cold Air Pool Case Study
2023The formation of stably stratified nocturnal Cold Air Pools (CAPs) is a frequently observed phenomenon in mountain valleys and sinkholes. Accurate representation of CAPs in numerical weather prediction models is important because they de termine local temperatures, may deteriorate air quality, and promote high-impact weather such as freezing rain.
openaire +1 more source
Meteorology and Atmospheric Physics, 2002
Turbulent erosion of the cold air pool (CAP) in a basin was investigated with a goal of evaluating Petkovsek’s (1985, 1992) hypothesis that wind velocity above a cold air pool must increase with time in order to destroy a cold air pool by the turbulent erosion mechanism.
J. Rakovec +3 more
openaire +1 more source
Turbulent erosion of the cold air pool (CAP) in a basin was investigated with a goal of evaluating Petkovsek’s (1985, 1992) hypothesis that wind velocity above a cold air pool must increase with time in order to destroy a cold air pool by the turbulent erosion mechanism.
J. Rakovec +3 more
openaire +1 more source
Automated algorithm for mapping regions of cold‐air pooling in complex terrain
Journal of Geophysical Research: Atmospheres, 2008In complex terrain, air in contact with the ground becomes cooled from radiative energy loss on a calm clear night and, being denser than the free atmosphere at the same elevation, sinks to valley bottoms. Cold‐air pooling (CAP) occurs where this cooled air collects on the landscape.
Jessica D. Lundquist +2 more
openaire +1 more source