نتایج جستجو برای: diurnal constituents
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[1] Data from a network of eddy covariance stations in Europe and North America (FLUXNET) were analyzed to examine the diurnal patterns of surface energy and carbon fluxes during the summer period across a range of ecosystems and climates. Diurnal trends were quantified by assessing the time of day surface fluxes and meteorological variable reached peak values, using the ‘‘diurnal centroid’’ me...
The extended Canadian Middle Atmosphere Model (eCMAM) was recently run in a nudged mode using reanalysis data from the ground to 1 hPa for the period of January 1979 to June 2010 (hence the name eCMAM30). In this paper, eCMAM30 temperature is used to examine the background mean temperature, the spectrum of the diurnal tides, and the climatology of the migrating diurnal tide Dw1 and three nonmig...
[1] Global high-resolution (3-hourly, 0.1 0.1 longitude-latitude) water vapor (6.7 mm) and window (11 mm) radiances from multiple geostationary satellites are used to document the diurnal cycle of upper tropospheric relative humidity (UTH) and its relationship to deep convection and high clouds in the whole tropics and to evaluate the ability of the new Geophysical Fluid Dynamics Laboratory (GF...
The diurnal variation of ozone in the stratosphere and lower mesosphere is analyzed using data from a ground-based microwave radiometer operating at the Mauna Loa NDACC station since the 1990s. Presented are considerations concerning the internal quality of the measurements, a verification study of the quality of the observed diurnal variability in comparison with external data sets obtained fr...
We investigated labor-related plasticity in the circadian clock of the bumblebee Bombus terrestris. Bumblebee workers vary enormously in body size, and we found that size, division of labor, and diurnal rhythms in activity are correlated in B. terrestris colonies. Large workers typically perform foraging activities with strong diurnal rhythms and low activity at night, whereas small bees typica...
Primary nocturnal enuresis. This is the recurrent involuntary passage of urine during sleep by a child aged 5 years or older, who has never achieved consistent night-time dryness. This may further be subdivided into: Primary nocturnal enuresis without daytime symptoms: children who have enuresis only at night. Primary nocturnal enuresis with daytime symptoms: those who also have daytime symptom...
INTRODUCTION Two main lines of approach are evident in recent work on diurnal rhythms of activity in animals. On the one hand investigators have been determining the form of the activity rhythm of many animals, particularly insects, and the effects of various environmental factors on these rhythms. On the other a small amount of work has been carried out on the internal factors which are involv...
Hourly measurements from 51 moored buoys in the Tropical Atmosphere Ocean array (9°N–8°S, 165°E– 95°W) during 1993–2004 are used to document the climatological seasonal and annual mean patterns of diurnal and semidiurnal near-surface wind variability over the tropical Pacific Ocean. In all seasons, the amplitude of the semidiurnal harmonic is approximately twice as large as the diurnal harmonic...
[1] Diurnal temperature variability in the top 50 m of the ocean is assessed by pairing Argo temperature profiles with geographically colocated Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) sea surface temperatures (SSTs) collected within 24 h of each other. Data pairs with time separations of up to 3 h are used to evaluate systematic differences between the two...
BACKGROUND AND PURPOSE A circadian variation with a morning peak on waking and arising is known to occur in both blood pressure (BP) and cardiovascular event onset. A second peak in BP has been described to occur after an afternoon sleep (siesta). This study was designed to investigate the hypothesis that the 2-peak diurnal variation of BP is dependent on physical activity and occurs in paralle...
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