Arid
DOI10.5194/amt-8-2233-2015
Continuous measurements of greenhouse gases and atmospheric oxygen at the Namib Desert Atmospheric Observatory
Morgan, E. J.1; Lavric, J. V.1; Seifert, T.1; Chicoine, T.2; Day, A.2; Gomez, J.2; Logan, R.2; Sack, J.2; Shuuya, T.2; Uushona, E. G.2; Vincent, K.2; Schultz, U.1; Brunke, E. -G.3; Labuschagne, C.3; Thompson, R. L.1; Schmidt, S.1; Manning, A. C.1; Heimann, M.1
通讯作者Morgan, E. J.
来源期刊ATMOSPHERIC MEASUREMENT TECHNIQUES
ISSN1867-1381
EISSN1867-8548
出版年2015
卷号8期号:6页码:2233-2250
英文摘要

A new coastal background site has been established for observations of greenhouse gases (GHGs) in the central Namib Desert at Gobabeb, Namibia. The location of the site was chosen to provide observations for a data-poor region in the global sampling network for GHGs. Semi-automated continuous measurements of carbon dioxide, methane, nitrous oxide, carbon monoxide, atmospheric oxygen, and basic meteorology are made at a height of 21 m a.g.l., 50 km from the coast at the northern border of the Namib Sand Sea. Atmospheric oxygen is measured with a differential fuel cell analyzer (DFCA). Carbon dioxide and methane are measured with an early-model cavity ring-down spectrometer (CRDS); nitrous oxide and carbon monoxide are measured with an off-axis integrated cavity output spectrometer (OA-ICOS). Instrument-specific water corrections are employed for both the CRDS and OA-ICOS instruments in lieu of drying. The performance and measurement uncertainties are discussed in detail. As the station is located in a remote desert environment, there are some particular challenges, namely fine dust, high diurnal temperature variability, and minimal infrastructure. The gas handling system and calibration scheme were tailored to best fit the conditions of the site. The CRDS and DFCA provide data of acceptable quality when base requirements for operation are met, specifically adequate temperature control in the laboratory and regular supply of electricity. In the case of the OA-ICOS instrument, performance is significantly improved through the implementation of a drift correction through frequent measurements of a reference cylinder.


类型Article
语种英语
国家Germany ; Namibia ; South Africa
收录类别SCI-E
WOS记录号WOS:000357117900001
WOS关键词RING-DOWN SPECTROSCOPY ; CARBON-MONOXIDE ; AIRBORNE MEASUREMENTS ; O-2/N-2 RATIO ; GROWTH-RATE ; TALL TOWER ; CAVITY ; CO2 ; CH4 ; O-2
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/186111
作者单位1.Max Planck Inst Biogeochem, Dept Biogeochem Syst, D-07745 Jena, Germany;
2.Gobabeb Res & Training Ctr, Gobabeb, Namibia;
3.South African Weather Serv, Stellenbosch, South Africa
推荐引用方式
GB/T 7714
Morgan, E. J.,Lavric, J. V.,Seifert, T.,et al. Continuous measurements of greenhouse gases and atmospheric oxygen at the Namib Desert Atmospheric Observatory[J],2015,8(6):2233-2250.
APA Morgan, E. J..,Lavric, J. V..,Seifert, T..,Chicoine, T..,Day, A..,...&Heimann, M..(2015).Continuous measurements of greenhouse gases and atmospheric oxygen at the Namib Desert Atmospheric Observatory.ATMOSPHERIC MEASUREMENT TECHNIQUES,8(6),2233-2250.
MLA Morgan, E. J.,et al."Continuous measurements of greenhouse gases and atmospheric oxygen at the Namib Desert Atmospheric Observatory".ATMOSPHERIC MEASUREMENT TECHNIQUES 8.6(2015):2233-2250.
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