搜索结果: 1-7 共查到“大气科学 isotopes”相关记录7条 . 查询时间(0.068 秒)
Sources of Holocene variability of oxygen isotopes in paleoclimate archives
Holocene variability paleoclimate archives oxygen isotopes
2009/12/3
Variability in water isotopes has been captured in numerous archives and used to infer past climate changes. Here we examine water isotope variability over the course of the Holocene using the water-...
Variability of organic and elemental carbon, water soluble organic carbon, and isotopes in Hong Kong
organic and elemental carbon water soluble organic carbon isotopes Hong Kong
2009/1/15
To determine the levels and variations of carbonaceous aerosol in Hong Kong, PM2.5 and PM10 samples were collected by high volume (Hi-vol) samplers at three monitoring stations (representing middle-sc...
Modelling the budget of middle atmospheric water vapour isotopes
atmospheric water vapour isotopes one-dimensional chemistry model
2009/1/9
A one-dimensional chemistry model is applied to study the stable hydrogen (D) and stable oxygen isotope (17O, 18O) composition of water vapour in stratosphere and mesosphere. In the troposphere, this ...
Measurements of CO2, its stable isotopes, O2/N2, and 222Rn at Bern, Switzerland
Measurements of CO2 stable isotopes O2/N2 222Rn Switzerland
2009/1/8
A one-year time series of atmospheric CO2 measurements from Bern, Switzerland, is presented. O2/N2 and Ar/N2 ratios as well as stable carbon and oxygen isotopes of CO2 and δ29N2, δ34O2 and δ36Ar were ...
Centennial evolution of the atmospheric methane budget: what do the carbon isotopes tell us?
atmospheric methane budget carbon isotopes
2008/12/8
Little is known about how the methane source inventory and sinks have evolved over recent centuries. New and detailed records of methane mixing ratio and isotopic composition (12CH4, 13CH4 and 14CH4) ...
Stable isotopes provide revised global limits of aerobic methane emissions from plants
Stable isotopes aerobic methane emissions plants
2008/11/27
Recently Keppler et al. (2006) discovered a surprising new source of methane – terrestrial plants under aerobic conditions, with an estimated global production of 62–236 Tg yr−1 by an unknown me...
Long-term field performance of a tunable diode laser absorption spectrometer for analysis of carbon isotopes of CO2 in forest air
tunable diode laser absorption spectrometer carbon isotopes CO2 forest
2008/11/19
Tunable diode laser absorption spectrometry (TDLAS) is gaining in popularity for measuring the mole fraction [CO2] and stable isotopic composition (δ13C) of carbon dioxide (CO2) in air in studies of b...