Impacts of irrigation on dry season precipitation in India
L'introduction de l'irrigation par la Révolution Verte a partout accru les précipitations de saison sèche ou, à tout le moins, en a ralenti la baisse. L'ampleur du phénomène varie d'une région à l'autre, mais on relève localement des augmentations
Role of soil moisture in the seasonal progress of the Asian summer monsoon
Asia ; Atmospheric dynamics ; Land atmosphere interaction ; Model ; Monsoon ; Precipitation ; Seasonal variability ; Soil moisture ; Summer
The aim of this paper is to quantify the role of slowly varying states of soil moisture in determining the seasonal evolution of the Asian Summer Monsoon (ASM). Particularly they focused on contribution from land memory in the 2 climatological
Alberta ; Canada ; Delta ; Humid environment ; Lake ; Remote sensing ; Seasonal variation ; Surface water ; Water resources
The AA. use in situ measurements of water-surface stage and remotely-sensed area to compute time varying storage changes in 9 lakes of the Peace-Athabusca Delta, Canada. Despite their identical geomorphic setting, regression slopes between water
-surface stage and remotely-sensed area vary significantly between lakes, primarily from a predictable area-effect but also small bathymetric variations between basins. Owing to their varying degrees of hydrologic linkage with the nearby Athabasca River
of the differences of plant physiology and environment conditions, temperature sensitivity of soil respiration (Q10) varied among vegetation types. The seasonal variation of Q10 was primarily driven by soil temperature while soil moisture had little influence
. The diurnal and seasonal variations in the temperature response of SR were assessed through continuous measurement during the June 2012 – May 2013 with an automated chamber system under 3 vegetation types in the hilly region of Mount Taihang, China. Because
on the dynamic for each site based on annual scales. However, due to the complicated relation between soil properties and SR, Q10 value derived from diurnal and seasonal patterns of SR should be used with extreme caution when estimating carbon balance
Albedo ; Debris cover ; Glacial ablation ; Glacial features ; Glacier ; Glacier mass balance ; Himalaya ; Model ; Nepal ; Seasonal variability ; Thermal conductivity
The AA. report measurements of vertical temperature profiles in debris on the Ngozumpa glacier in the Khumbu Himal region,Nepal, that show : 1) conductive processes dominate during the ablation season in matrix-supported diamict; 2) ventilation may
be possible in coarse surface layers; 3) phase changes associated with seasonal change have a marked effect on the effective thermal diffusivity of the debris. Effective thermal conductivity determined from vertical temperature profiles in the debris
is generally higher in summer than in winter, but values depend on the volume and phase of water in the debris. Surface albedo can vary widely over small spatial scales, as does the debris thickness. The findings from Ngozumpa glacier indicate
Down-slope change in soil hydrogeochemistry due to seasonal water table rise : Implications for groundwater weathering
and regolith weathering hydrochemistry. Strontium isotope analysis of the groundwater, stream water, soil pore water, and soil exchange pool has established that the stream water is a mix of soil water and groundwater. This mix variesseasonally due to large
Climatic trend ; Correlation ; Scandinavia ; Seasonal variation ; Temperature ; Time series ; Zonality
and that any distinct periods are hard to identify, except for a phase with low ZI for winters over the North Atlantic area during 1955-70. The correlation between ZI and temperature is shown to vary over time (especially for spring and autumn) indicating
Alger ; Algeria ; Climate ; Climatic cycle ; Climatic variation ; Drought ; Mediterranean area;Mediterranean region ; Periodicity ; Seasonal variability ; Subtropical zone ; Time series
Le nombre de mois secs et de mois arides varie de manière quasi cyclique, avec une période longue de 47 ans et une plus courte de moitié, toutes deux étant partiellement masquées par une alternance bisannuelle nette. Mais à intensité identique, les
Asian part of Russia ; Climate ; Climatic cycle ; Geosystem ; Season ; Vegetation ; West Siberia
modèle structural pluriannuel moyen des rythmes saisonniers de la période de végétation du cycle annuel varie du Sud au Nord, d'un modèle à 6 phases à un modèle à 3 phases. Chacune des phases est caractérisée par un niveau déterminé de chaleur, d'humidité
This paper focuses on the urban biogeographical study of tree quality with regard to habitat conditions that vary mainly by land cover. Statistical analysis, including logistic regression, was used to test the hypothesis that tree performance
is related to extrinsic habitat conditions (planting site, ground cover, land cover, and district) and intrinsic tree traits (species provenance, seasonality, tree dimensions). A total of 6,351 trees were evaluated. District differentiation in tree
The article describes biometeorological vs. meteorological conditions in the area of the Forlandsundet (NW Spitsbergen) in the summer season of 2010. The diversity of these conditions was analysed at eight points in different weather, considering
. The meteorological and biometeorological conditions were found to be considerably varied over the period of observations. – (BJ)
Antarctica ; Atmosphere ; Atmospheric moisture ; Boundary layer ; Climate ; Cold area ; Seasonal variation ; Temperature
Analyse des profils verticaux de l'humidité atmosphérique et de la température, de 0 à 10 km d'altitude. Le rythme diurne varie notablement d'une saison à l'autre, ainsi que d'une sous-couche à l'autre au sein de la couche limite atmosphérique. La
Aerosol ; Appalachian Mountains ; Atmospheric dynamics ; Atmospheric moisture ; Cloud ; Mountain ; Precipitation ; Seasonal variation ; United States of America
Particulièrement complexe en milieu montagneux, le lien entre aérosols, dynamique des nuages et précipitations varie d'une saison à l'autre, mais aussi selon la taille des particules en suspension et selon la situation synoptique. La relation la
and 3 sedimentary cores suggests that other modes of formation may also be applicable. A dual model of formation is proposed : surface silcretes are suggested to have developed by silica accumulation in seasonal pools remaining after the annual Okavango
flood, whilst sub-surface horizons appear to have formed under conditions of varying pH associated with fluctuating groundwater levels beneath the channel floor.
During 4 field seasons, MS measurements were obtained from the ground surface at more than 80 sites across the Loess Plateau. The results confirmed that MS varies systematically across the plateau. Here the AA. examine possible sedimentological
The avifauna of hedges and its seasonal variations was studied throughout a yearly cycle in the Autunois central France. The total number and the diversity of birds found on each plot was strongly correlated with certain characteristics
of the hedges : physiognomy, stratification and volume of vegetation. Plots containing treeless hedges which were trimmed every year had a less abundant and a less varied avifauna.
China ; Climatic warming ; Ground freezing ; Ground survey ; Mountain ; Periglacial features ; Permafrost ; Seasonal variation ; Soil temperature ; Temperature ; Tibet
and groundwater level. Extrapolation of the mean annual ground temperatures suggests that permafrost is unlikely present below an unfrozen talik, while it possibly disappeared within the last few decades. Soil moisture and groundwater level primary vary
This paper reports soil losses from 15 erosion plots in the Middle Hills, Nepal, for the 1992 and 1993 monsoon and pre-monsoon seasons. In total, 912 rainfall events were monitored. Land cover varied from grassland and relatively undisturbed mixed