Results 251 to 260 of about 936,045 (302)

Terrestrial water fluxes dominated by transpiration

Nature, 2013
Renewable fresh water over continents has input from precipitation and losses to the atmosphere through evaporation and transpiration. Global-scale estimates of transpiration from climate models are poorly constrained owing to large uncertainties in stomatal conductance and the lack of catchment-scale measurements required for model calibration ...
Scott, Jasechko, Zachary D, Sharp, John J, Gibson, S Jean, Birks, Yi, Yi, Peter J, Fawcett   +5 more
openaire   +2 more sources

Water flux in a hybrid poplar stand

Tree Physiology, 1994
We studied water flux in a four-year-old stand of hybrid Populus during midsummer 1992. Study trees ranged in height from 11.0 to 15.1 m and in diameter from 8.3 to 15.1 cm. The large-leafed Populus hybrid was relatively poorly coupled to the atmosphere.
Hinckley, T.M., Brooks, J.R., Cermák, J., Ceulemans, Reinhart, Ku·era, J., Meinzer, F.C., Roberts, D.A.   +6 more
openaire   +3 more sources

Water fluxes in nerve fiber

The Journal of Membrane Biology, 1977
The hydrostatic (Lp) and osmotic (LPD) filtration coefficients and the efflux rates of tritiated water were measured in the giant axon of Loligo vulgaris. The Lp was 8 to 14 X 10(-8) cm/sec/cm H2O and the LPD was two orders of magnitude smaller (3 to 6 X 10(-10) cm/sec/cm H2O).
openaire   +2 more sources

Water‐air flux of dimethylsulfide

Journal of Geophysical Research: Oceans, 2000
The water‐air exchange of dimethylsulfide (DMS) has been measured in a laboratory wind‐wave tank in fresh and seawater. To understand the transport behavior of DMS, its exchange was measured simultaneously with that of O2, SF6, Ne, CH4, and He under varying wind speeds and hydrodynamic conditions. No unpredictable differences between fresh and seawater
W. R. McGillis, J. W. H. Dacey, N. M. Frew, E. J. Bock, R. K. Nelson   +4 more
openaire   +1 more source

Water vapor flux at the sea surface

Boundary-Layer Meteorology, 1989
Methods and instrumentation for determining the rate of evaporation at the sea surface are reviewed. At experimental sites free of local influences, there is a consensus that the evaporation coefficient in neutral conditions C EN = 1.2 × 10−3 at low and moderate wind speeds.
openaire   +1 more source

Fluxes of Carbon, Water and Nutrients

2012
The metabolic and physical processes result in concentration, pressure and temperature differences that generate fluxes within ecosystems and between ecosystems and their surroundings. We apply the same approach combining metabolic and physical processes with transport in the analysis of very different phenomena from water and sugar transport within ...
Teemu Hölttä, Pertti Hari, Kari Heliövaara, Eero Nikinmaa, Jukka Pumpanen, Timo Vesala, Pasi Kolari, Samuli Launiainen, Üllar Rannik, Liisa Kulmala, Kourosh Kabiri Koupaei, Minna Pulkkinen, Mari Pihlatie, Janne F. J. Korhonen, Asko Simojoki, Antti-Jussi Kieloaho, Jaana Bäck, Markku Kulmala   +17 more
openaire   +1 more source

Automated Flux Chamber for Investigating Gas Flux at Water–Air Interfaces

Environmental Science & Technology, 2012
Aquatic ecosystems are major sources of greenhouse gases (GHG). Representative measurements of GHG fluxes from aquatic ecosystems to the atmosphere are vital for quantitative understanding of relationships between biogeochemistry and climate. Fluxes occur at high temporal variability at diel or longer scales, which are not captured by traditional short-
Nguyen Thanh, Duc, Samuel, Silverstein, Lars, Lundmark, Henrik, Reyier, Patrick, Crill, David, Bastviken   +5 more
openaire   +2 more sources

WATER FLUX IN MOIST SOIL

Soil Science, 1965
That thermal gradients cause moisture transport in soil has been well known for at least 50 years. It is, however, surprising that so little attention has been paid to this phenomenon, since soil in its natural environment is continuously subject to changing temperatures.
openaire   +1 more source

Oceanic Fluxes In Icelandic Waters

2001
No abstracts are to be cited without prior reference to the author.In the EU project VEINS 1997-2000 the Marine Research Institute was involved in the following tasks; a) Providing an improved estimate of the fresh water flux in the cold East Greenland and East Icelandic Currents and b) Measuring the inflow of Atlantic water through the Denmark Strait.
Malmberg, Svend-Aage, Mortensen, John, Jónsson, Steingrímur   +2 more
openaire   +1 more source

The importance of nutritional regulation of plant water flux

Oecologia, 2009
Transpiration is generally considered a wasteful but unavoidable consequence of photosynthesis, occurring because water is lost when stomata open for CO(2) uptake. Additionally, transpiration has been ascribed the functions of cooling leaves, driving root to shoot xylem transport and mass flow of nutrients through the soil to the rhizosphere.
Michael D, Cramer, Heidi-Jayne, Hawkins, G Anthony, Verboom   +2 more
openaire   +2 more sources