17,025 research outputs found
Analysis of field measurements of carbon dioxide and water vapor fluxes
Analysis of the field measurements of carbon dioxide and water vapor fluxes is discussed. These data were examined in conjunction with reflectance obtained from helicopter mounted Modular Multiband Radiometer. These measurements are representative of the canopy scale (10 to 100 m)(exp 2) and provide a good basis for investigating the hypotheses/relationship potentially useful in remote sensing applications. All the micrometeorological data collected during FIFE-89 were processed and fluxes of CO2, water vapor, and sensible heat were calculated. Soil CO2 fluxes were also estimated. Employing these soil CO2 flux values, in conjunction with micrometeorological measurements, canopy photosynthesis is being estimated. A biochemical model of leaf photosynthesis was adapted to the prairie vegetation. The modeled leaf photosynthesis rates were scaled up to the canopy level. This model and a multiplicative stomatal conductance model are also used to calculate canopy conductance
Analysis of soil and species composition
Measurements were made during May to October, 1987 and June to August, 1989 over a tallgrass prairie near Manhattan, Kansas. Soil at the experimental site is predominantly Dwight silty clay loam. The prairie was burned on 16 April 1987 and on 28 April 1989 to improve the mix of grasses and forbs. The experimental area was not grazed during 1986 - 1989. A summary of results are given for soil moisture and plant growth; momentum flux and canopy aerodynamic characteristics; evapotranspiration, components of energy balance and canopy conductance; modeling canopy stomatal conductance; canopy photosynthesis, photosynthetic efficiency and water use efficiency; modeling canopy photosynthesis; the carbon dioxide budget in a temperate grassland ecosystem; and photosynthesis and stomatal conductance related to reflectance on the canopy scale
Opto-mechanical effects in self-organization of a Bose-Einstein condensate in an optical cavity
The influence of mirror motion on the spatial self organization of a
Bose-Einstein condensate (BEC) in an optical cavity is studied. We show that
the mirror dynamics tends to destroy the process of self organization. An
additional external phonon pump is shown to modify the critical photon pump
needed to observe the onset of self organization.Comment: 10 pages, 10 figure
Quark-lepton complementarity model based predictions for with neutrino mass hierarchy
After the successful investigation and confirmation of non zero
by various experiments, we are standing at a square where
we still encounter a number of issues, which are to be settled. In this paper,
we have extended our recent work towards a precise prediction of the
mixing angle, taking into account the neutrino mass
hierarchy. We parameterize the non-trivial correlation between quark (CKM) and
lepton (PMNS) mixing matrices in quark-lepton complementarity (QLC) model as
, where is a diagonal phase matrix.
Monte Carlo simulations are used to estimate the texture of and compare
the results with the standard Tri-Bi-Maximal (TBM) and Bi-Maximal(BM)
structures of neutrino mixing matrix. We have predicted the value of
for normal and inverted neutrino mass hierarchies. The
value of obtained for two cases are about away
from each other, implying the better precision can give us a strong hint for
the type of neutrino mass hierarchy.Comment: 3 pages, 3 figure
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