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Spatial, synoptic, and seasonal patterns of heavy rainfall in the southeastern United States

Spatial, synoptic, and seasonal patterns of heavy rainfall in the southeastern United States
Air mass ; Alabama ; Arkansas ; Atmospheric dynamics ; Cyclogenesis ; Florida ; Heavy rain ; Louisiana ; North Carolina ; Precipitation ; Rainstorm ; Seasonality ; Southern United States ; Spatial variation ; Statistics ; Synoptic climatology
This paper examines the synoptic climatology and seasonality of heavy rainfall across the southeastern United States, in adopting a threshold approach. Frontal systems (particularly cold fronts) were found to be the dominant mechanism that induces
heavy rainfall across the study area, but tropical disturbances and air-mass storms also contribute, especially at the more coastal locations. Annual regimes were found to vary dramatically from one site to another, and 7 of the 8 sites investigated
exhibited statistically significant seasonality.

A model study on seasonal spatial-temporal variability of the lagrangian residual circulations in the Bohai Sea

A model study on seasonal spatial-temporal variability of the lagrangian residual circulations in the Bohai Sea
Model ; Monsoon ; Numerical model ; Ocean circulation ; Pacific Region ; Seasonal variation ; Tide ; Wind
significantly to the whole LRC in the Bohai Sea. Unlike the identical structure of the tide-induced LRC, the wind diven LRC varies seasonally under the prevailing monsoon.
The results showed that the tide-induced Lagrangian Residual Circulations, LRC, of the harmonic constituent M2 bears an identical pattern in 4 seasons in the Bohai Sea : the surface one is weak with random directions; however, there exist

An analysis of seasonal biases in satellite and reanalysis rainfall products in the Savannah River basin

An analysis of seasonal biases in satellite and reanalysis rainfall products in the Savannah River basin
Data processing ; Hydrology ; Model ; Precipitation ; Remote sensing ; Satellite ; Season ; Southeastern United States ; Statistical bias ; United States of America ; Watershed
mechanism in this region during the summer. Daily precipitation biases are around 5 mm, but the sign of the bias varies by season, with positive biases in all seasons but fall. Additionally, the AA. found that satellite-based data tend to overestimate light
in the southeastern United States. The AA. observed biases that occur seasonally and by magnitude. Seasonally, precipitation correlates well in most seasons but summer, likely due to the sporadic nature of convective precipitation that is a common precipitation

The influence of seasonal climatic parameters on the permafrost thermal regime, West Siberia, Russia

The influence of seasonal climatic parameters on the permafrost thermal regime, West Siberia, Russia
Active layer ; Asian part of Russia ; Climatic change ; Periglacial features ; Permafrost ; Seasonal variability ; Taiga ; Temperature ; Thermal regime ; Tundra ; West Siberia
Statistical correlations between seasonal air temperatures and snow depths and active layer depths and permafrost temperatures were analysed for tundra (Marre-Salle) and northern taiga (Nadym) sites in Western Siberia. Overall, the most important
factors influencing the permafrost regime were spring and summer air temperatures, and in one case snow depth. However, statistical links between meteorological and permafrost parameters varied between the tundra and northern taiga zones and among

Mineralogy of dust deposited during the Harmattan season in Ghana

Mineralogy of dust deposited during the Harmattan season in Ghana
. The relative contents of K-feldspars and plagioclase vary markedly in the different zones. The pH of the dust is significantly higher than that of the local soils, indicating that a substantial amount of the dust comes from the Sahara.

Diurnal variations in summer season precipitation in India

Diurnal variations in summer season precipitation in India
Il existe sur la presque totalité du subcontinent indien un cycle diurne bien marqué des précipitations. Le rythme interhoraire, plus ou moins contrasté, varie d'une région à l'autre sous le double effet de la topographie et des processus convectifs

Diatom evidence on Wisconsin and Holocene events in the Bering Sea

seasonal contrast than today, with some winter sea-ice cover, an intensified temperature minimum, and high spring productivity. Variations in clastic and reworked fossil material imply varying degrees of transport to the basin by Alaskan rivers.
The early and late Wisconsin maxima were times of prolonged annual sea-ice cover and a short cool period of phytoplankton productivity during the ice-free season. The middle Wisconsin interstade, at least in the southern Bering Sea, had greater

A note on spatial and seasonal variations in wind speed over Nigeria

A note on spatial and seasonal variations in wind speed over Nigeria
Etude de la vitesse du vent (mesurée à 9-10mètres au-dessus du sol avec un anémomètre à cuillère) au Nigéria: cette vitesse est plus élevée à l'intérieur du pays que le long des côtes et varie selon les saisons (plus forte en saison humide (Juillet

Stream water quality in a mountain recreation area

Surface waters in and near the Indian Peaks Wilderness area in Colorado, USA vary seasonally and locationally in chemical and biological constituents. The level of inorganic nutrients depends on stream flow. - (DWG)

Space–time dynamics of crime in transport nodes

Criminality ; Geographical information system ; Seasonal variation ; Social geography ; Space time ; Stockholm ; Sweden ; Urban transport ; Vulnerability
This study investigates daily, weekly, and seasonal variations of crime at underground stations in the Swedish capital, Stockholm. Findings show that crimes tend to happen more often in the evening, at night, on holidays, and on weekends
. There is also evidence of seasonal variations of crime. Stations with hiding spots are often targeted for crime during daily peak hours, whereas during holidays, crowded stations and those with alcohol selling outlets attract more criminal activities. Results
suggest that the role of the stations’ environment on crime causation varies over time—an important fact for safety interventions.

Impact of the timing and duration of seasonal snow cover on the active layer and permafrost in the Alaskan Arctic

Impact of the timing and duration of seasonal snow cover on the active layer and permafrost in the Alaskan Arctic
This study addresses the impact of variations in the timing and duration of seasonal snow cover on the thermal regime of the active layer and permafrost in the Alaskan Arctic through numerical modelling. Meteorological data from 1995 to 1998
by varying the snowpack onset date in autumn and the disappearance date in spring.

Seasonal and diurnal variations in N2O concentrations and fluxes from three eutrophic rivers in Southeast China

Seasonal and diurnal variations in N2O concentrations and fluxes from three eutrophic rivers in Southeast China
Anhui ; China ; Diurnal variation ; Eutrophication ; Nitrogen ; Pollution ; Seasonal variability ; Stream ; Water pollution
This study was performed at 3 eutrophic rivers in Southeast China aiming to determine the magnitude and patterns of dissolved N2O concentrations and fluxes over a seasonal (in 2009) and diurnal (24 h) temporal scale. The results showed that N2O
concentrations varied in the Fengle, Hangbu and Nanfei rivers, respectively, in the diurnal study performed during the summer of 2008. The study found that mean N2O concentration and estimated measured from the Nanfei River with serious urban wastewater pollution
was significantly higher than those from the Fengle and the Hangbu Rivers with agricultural runoff. The study demonstrated both N2O concentrations and fluxes exhibited seasonal and diurnal fluctuations. In addition, N2O accumulation rates over 3 consecutive days

Infrastructures urbaines : réalisation, fonctionnement et maintenance au rythme des saisons

Applied climatology ; Geotechnics ; Management ; Road system ; Season ; Town ; Urban infrastructure
L'état physique des voiries urbaines varie avec les saisons, qui gouvernent la planification et la réalisation des travaux. Leur prise en compte optimise à la fois les coûts et la durée des structures. Elles transforment aussi les métiers. - (JPB)

Elevated inversions over southern Africa : climatological properties and relationships with rainfall

Annual variation ; Anticyclone ; Atmospheric circulation ; Climatic cycle ; Coastal environment ; Ocean atmosphere interaction ; Precipitation ; Seasonal variation ; South Africa ; Spatial variation ; Statistics ; Temperature inversion
Most climatological properties of first elevated inversions over southern Africa vary on annual cycles, although semi-annual cycles are prominent in base levels over the northern interior and in inversion strengths and frequencies. There are marked

Évolution du climat et santé à Cuba. Recherches prélimaires

Bioclimatology ; Cuba ; Health ; Human bioclimatology ; Meteoropathology ; Seasonal variation ; Weather type
pluies. Le rôle des différents types de temps varie beaucoup entre l'est et l'ouest de l'île, de même qu'entre le littoral et l'intérieur. - (JPB)

Modeling the effects of tropical cyclones on flooding in the Santa Fe River Basin, Florida in Caribbean hurricanes.

the representation of seasonally varying processes and facilitate extrapolation of findings to much rarer levels of flood definition.

Struktura i produktivnost' soobscestva Jurinea derderioides pustyni Karakumy Structure et productivité d'une formation de Jurinea derderioides dans le désert du Karakum

Jurinea derderioides is one of the phytomeliorants in the Turkmenistan sandy desert. Its communities are connected with gypsiferous, weakly-anchored sands and are indicators of dune sands. Above ground phytomass varies depending on seasons from 321

Climate and the limits of permafrost : a zonal analysis

through seasonal surface transfer functions and subsurface thermal properties. The temperature of permafrost (TTOP) results from the interplay between the air temperature, the nival (snow) offset and the thermal offset. These offset values vary

Meteorology of the Indian summer monsoon

The seasonally varying monsoon circulations associated with the annual heating and cooling of the Asian continent are the most important large-scale aspects of the general circulation of the atmosphere. The Indian summer monsoon affects the lives

Water circulation in particular seasons in northwest Sørkapp Land

Water circulation in particular seasons in northwest Sørkapp Land
On the base of varied course of meteorological and hydrological phenomenas during summer period it is possible to distinguish two subperiods : the earlier subperiod of intensive snow patches ablation and intensive permafrost thawing and the later

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