منابع مشابه
The abundance and isotopic composition of water in eucrites
Volatile elements play a key role in the dynamics of planetary evolution. Extensive work has been carried out to determine the abundance, distribution, and source(s) of volatiles in planetary bodies such as the Earth, Moon, and Mars. A recent study showed that the water in apatite from eucrites has similar hydrogen isotopic compositions compared to water in terrestrial rocks and carbonaceous ch...
متن کاملKeith: Inferences from the Isotopic Composition of Water Vapor
Air may cross the tropical tropopause either by gradual ascent or in localized episodes associated with convection. While observations demonstrate that water vapor mixing ratios of air entering the tropical stratosphere are consistent with the mean tropical tropopause temperature, they do not resolve key mechanistic questions, such as the relative contribution of gradual or episodic transport, ...
متن کاملIsotopic composition of stratospheric water vapor: Implications for transport
We develop a series of models of transport in the upper tropical troposphere in order to explain the observed abundance and isotopic composition of stratospheric water vapor. We start with the Rayleigh fractionation process and add the effects of mixing and recirculation of stratospheric air through the upper troposphere. We compare our measurements with model calculations for a range of input ...
متن کاملIsotopic composition of stratospheric water vapor: Measurements and photochemistry
We present a photochemical model describing the changes in the isotopic composition of stratospheric water vapor that result from methane oxidation and reactions with O( ). We then compare model calculations with measurements made with the Smithsonian Astrophysical Observatory far-infrared spectrometer during seven balloon flights that took place between 1989 and 1997. The agreement between the...
متن کاملUnderstanding the Sahelian water budget through the isotopic composition of water vapor and precipitation
[1] The goal of this paper is to investigate the added value of water isotopic measurements to estimate the relative influence of large‐scale dynamics, convection, and land surface recycling on the Sahelian water budget. To this aim, we use isotope data in the lower tropospheric water vapor measured by the SCIAMACHY and TES satellite instruments and in situ precipitation data from the Global Ne...
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ژورنال
عنوان ژورنال: Japan journal of water pollution research
سال: 1985
ISSN: 0387-2025
DOI: 10.2965/jswe1978.8.482