trace gases
Atmospheric Trace Gases as Probes of Chemistry and Dynamics
... Microsoft Word kfl thesis v0 2 docx Atmospheric Trace Gases as Probes of Chemistry and Dynamics Thesis by King Fai Li In Partial Fulfillment of the Requirements for the degree of Doctor of Philosophy[.] ...
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Preflight calibration of the Chinese Environmental Trace Gases Monitoring Instrument (EMI)
... environmental trace gases monitoring instru- ment (EMI) is a nadir-viewing wide-field imaging spectrom- eter, which aims to quantify the global distribution of tropo- spheric and stratospheric trace ...
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Ground-based Measurements of Atmospheric Trace Gases in Beijing during the Olympic Games
... the trace gas VMR profile ...process, trace gases VMR is iteratively adjusted and output after the maximum iterative number is completed or the cost function is ...
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Ground-Based Measurements of Atmospheric Trace Gases in Beijing during the Olympic Games
... manmade trace gases have increasingly influenced atmospheric composition and produced great impacts on the atmospheric environment and global climate ...the trace gases as well as their ...
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BOREAS – a new MAX-DOAS profile retrieval algorithm for aerosols and trace gases
... and trace gases BOREAS (Bremen Optimal estima- tion REtrieval for Aerosols and trace gaseS), which has been developed to improve the earlier profile retrieval algorithm (Wittrock, ...for ...
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Mobile MAX-DOAS observations of tropospheric trace gases
... tropospheric trace gases and ...First, trace gases can be located at high altitudes above the instrument and are “seen” by the instrument at different horizontal dis- tances depending on the ...
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Atmospheric transport and chemistry of trace gases in LMDz5B: evaluation and implications for inverse modelling
... We have investigated impacts of new physical parameteri- zations for deep convection (Emanuel, 1991) and boundary layer mixing due to vertical diffusion (Yamada, 1983) and thermal plumes (Rio and Hourdin, 2008; Rio et ...
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Potential for the use of reconstructed IASI radiances in the detection of atmospheric trace gases
... with trace gases may not be well represented in the reconstructed spectra, either due to deficiencies in the training set or due to the limited number of PC scores used in the radiance ...several ...
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The CU Airborne MAX-DOAS instrument: vertical profiling of aerosol extinction and trace gases
... 2006; Melamed et al., 2008) over polluted regions. These in- struments used multiple telescopes, most notably zenith and nadir, to collect scattered sunlight. Over the past few years, building on the well-established ...
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The Heidelberg Airborne Imaging DOAS Instrument (HAIDI) – a novel imaging DOAS device for 2-D and 3-D imaging of trace gases and aerosols
... and is thereby partly absorbed by different trace gases and aerosols. This light is then reflected on the ground or scat- tered in the atmosphere by Rayleigh and Mie scattering be- fore it is collected by ...
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Characteristics of Atmospheric Trace Gases, Particulate Matter and Heavy Metal Pollution in Karachi, Pakistan
... of trace metals like (cadmium, zinc, lead, manganese, copper and nickel) also analyzed in the samples collected from industrial and commercial areas of Karachi ...
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The impact of vibrational Raman scattering of air on DOAS measurements of atmospheric trace gases
... each trace gas and also for dif- ferent spectral resolutions of the respective MAX-DOAS in- struments, which can have an influence on the way in which the neglected apparent OD was compensated ...
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Atmospheric trace gases support primary production in Antarctic desert surface soil
... Describe how sample size was determined. No statistical methods were used to predetermine sample sizes. Three biologically independent soil samples were collected from the two sampling sites, Robinson Ridge (December ...
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A molecular study of the bacterioneuston and its role in the air sea exchange of trace gases
... The investigation into the methanotrophs present in the samples collected for this study was carried out using peR primers specific for two different genes encoding enzymes involved in m[r] ...
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On the attribution of contributions of atmospheric trace gases to emissions in atmospheric model applications
... The attribution of climate change to changes in emission of greenhouse gases and precursors has been an issue of seri- ous concern over several decades. Recently, EU-projects like QUANTIFY and ATTICA aimed at ...
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A 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases
... Photoacoustic spectroscopy (PAS) has been continually developed as a measurement tool for trace gas detection since its discovery by Bell in 1880 [1]. The technique can be used in a number of fields, including ...
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Application of Non Dispersive Infrared (NDIR) Spectroscopy to the Measurement of Atmospheric Trace Gases
... A non-dispersive infrared spectrometer constructed for an M.Sc. project in 2004 has been improved and tested. The final cost of the instrument was US$3,500, making it an affordable gas measurement instrument for today’s ...
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The benefit of limb cloud imaging for infrared limb sounding of tropospheric trace gases
... and trace gas distributions, detector pixels of the LCI have to be combined into super-pixels which provide the required signal-to-noise and information content for the ...
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Uncovering the Metabolic Strategies of the Dormant Microbial Majority: towards Integrative Approaches
... Atmospheric trace gases may be particularly desirable: while insuffi- ciently concentrated to support growth, they are dependable energy sources for persistence given their ubiquity and ...
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The influence of redox dynamics on nitrogen cycling and nitrous oxide emissions from soils
... From our results, we observed that changes in VWC in unsaturated media affect both physical and biological properties. The behavior of water dynamics can indeed lead to preferential flow path or entrapments of both air ...
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