FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4253202287> ?p ?o ?g. }

• W4253202287 abstract "Abstract. Nighttime HOx chemistry was investigated in two ground-based field campaigns (PRIDE-PRD2006 and CAREBEIJING2006) in summer 2006 in China by comparison of measured and modelled concentration data of OH and HO2. The measurement sites were located in a rural environment in the Pearl River Delta (PRD) under urban influence and in a suburban area close to Beijing, respectively. In both locations, significant nighttime concentrations of radicals were observed under conditions with high total OH reactivities of about 40–50 s−1 in PRD and 25 s−1 near Beijing. For OH, the nocturnal concentrations were within the range of (0.5–3) × 106 cm s−3 implying a signficant nighttime oxidation rate of pollutants in the order of several ppb per hour. The measured nighttime concentration of HO2 was about (0.2–5) × 108 cm −3 containing a significant, model-estimated contribution from RO2 as an interference. A chemical box model based on an established chemical mechanism is capable to reproduce the measured nighttime values of the measured peroxy radicals and kOH, but underestimates in both field campaigns the observed OH by about one order of magnitude. Sensitivity studies with the box model demonstrate that the OH discrepancy between measured and modelled nighttime OH can be resolved, if an additional chem{RO_x} production process (about 1 ppb h s−1) and additional recycling (RO2 &amp;rightarrow; HO2 &amp;rightarrow; OH) with an efficiency equivalent to 1 ppb NO is assumed. The additional recycling mechanism was also needed to reproduce the OH observations at the same locations during daytime for conditions with NO mixing ratios below 1 ppb. This could be an indication that the same missing process operates at day and night. In principle, the required primary c source can be explained by ozonolysis of terpenoids, which react faster with ozone than with OH in the nighttime atmosphere. However, the amount of these highly reactive biogenic VOC would require a strong local source, for which there is no direct evidence. A more likely explanation for an additional s−1 source is the vertical downward transport of radical reservoir species in the stable nocturnal boundary layer. Using a simplified 1-dimensional two-box model, it can be shown that ground-based NO emissions could generate a large vertical gradient causing a downward flux of PAN and MPAN. The downward transport and the following thermal decomposition of these compounds can produce up to 0.3 ppb h−1 radicals in the atmospheric layer near the ground. Although this rate is not sufficient to explain the complete OH discrepancy, it indicates the potentially important role of vertical transport in the lower nighttime atmosphere." @default.
• W4253202287 created "2022-05-12" @default.
• W4253202287 creator A5000755712 @default.
• W4253202287 creator A5007156367 @default.
• W4253202287 creator A5012849473 @default.
• W4253202287 creator A5019396930 @default.
• W4253202287 creator A5020998607 @default.
• W4253202287 creator A5024439862 @default.
• W4253202287 creator A5030686664 @default.
• W4253202287 creator A5035975798 @default.
• W4253202287 creator A5045617018 @default.
• W4253202287 creator A5055818533 @default.
• W4253202287 creator A5057504165 @default.
• W4253202287 creator A5063605514 @default.
• W4253202287 creator A5064035375 @default.
• W4253202287 creator A5080041548 @default.
• W4253202287 creator A5081630138 @default.
• W4253202287 date "2013-12-02" @default.
• W4253202287 modified "2023-09-29" @default.
• W4253202287 title "Nighttime observation and chemistry of HO_x in the Pearl River Delta and Beijing in summer 2006" @default.
• W4253202287 cites W1535993650 @default.
• W4253202287 cites W1667277804 @default.
• W4253202287 cites W1971351078 @default.
• W4253202287 cites W1976186159 @default.
• W4253202287 cites W1979213239 @default.
• W4253202287 cites W1988081602 @default.
• W4253202287 cites W1988689801 @default.
• W4253202287 cites W1994727574 @default.
• W4253202287 cites W1994950978 @default.
• W4253202287 cites W2002614078 @default.
• W4253202287 cites W2008736427 @default.
• W4253202287 cites W2012173763 @default.
• W4253202287 cites W2013585820 @default.
• W4253202287 cites W2015142434 @default.
• W4253202287 cites W2015735547 @default.
• W4253202287 cites W2021936090 @default.
• W4253202287 cites W2022722659 @default.
• W4253202287 cites W2022847557 @default.
• W4253202287 cites W2030869843 @default.
• W4253202287 cites W2034143789 @default.
• W4253202287 cites W2038596837 @default.
• W4253202287 cites W2040450731 @default.
• W4253202287 cites W2040676153 @default.
• W4253202287 cites W2044160173 @default.
• W4253202287 cites W2044578981 @default.
• W4253202287 cites W2045848467 @default.
• W4253202287 cites W2047376353 @default.
• W4253202287 cites W2049834983 @default.
• W4253202287 cites W2055869887 @default.
• W4253202287 cites W2056554352 @default.
• W4253202287 cites W2062931280 @default.
• W4253202287 cites W2082035655 @default.
• W4253202287 cites W2086604129 @default.
• W4253202287 cites W2087764785 @default.
• W4253202287 cites W2088540561 @default.
• W4253202287 cites W2091308375 @default.
• W4253202287 cites W2093264248 @default.
• W4253202287 cites W2093392221 @default.
• W4253202287 cites W2110356767 @default.
• W4253202287 cites W2115947688 @default.
• W4253202287 cites W2121472298 @default.
• W4253202287 cites W2125448651 @default.
• W4253202287 cites W2126656937 @default.
• W4253202287 cites W2131602339 @default.
• W4253202287 cites W2132330981 @default.
• W4253202287 cites W2136263534 @default.
• W4253202287 cites W2137029702 @default.
• W4253202287 cites W2143422504 @default.
• W4253202287 cites W2143807104 @default.
• W4253202287 cites W2151956104 @default.
• W4253202287 cites W2153330214 @default.
• W4253202287 cites W2154568974 @default.
• W4253202287 cites W2159342794 @default.
• W4253202287 cites W2160885731 @default.
• W4253202287 cites W2164868576 @default.
• W4253202287 cites W2165315818 @default.
• W4253202287 cites W2165619190 @default.
• W4253202287 cites W2167691878 @default.
• W4253202287 cites W2479704413 @default.
• W4253202287 cites W264418522 @default.
• W4253202287 cites W4251250077 @default.
• W4253202287 doi "https://doi.org/10.5194/acpd-13-31311-2013" @default.
• W4253202287 hasPublicationYear "2013" @default.
• W4253202287 type Work @default.
• W4253202287 citedByCount "1" @default.
• W4253202287 countsByYear W42532022872019 @default.
• W4253202287 crossrefType "posted-content" @default.
• W4253202287 hasAuthorship W4253202287A5000755712 @default.
• W4253202287 hasAuthorship W4253202287A5007156367 @default.
• W4253202287 hasAuthorship W4253202287A5012849473 @default.
• W4253202287 hasAuthorship W4253202287A5019396930 @default.
• W4253202287 hasAuthorship W4253202287A5020998607 @default.
• W4253202287 hasAuthorship W4253202287A5024439862 @default.
• W4253202287 hasAuthorship W4253202287A5030686664 @default.
• W4253202287 hasAuthorship W4253202287A5035975798 @default.
• W4253202287 hasAuthorship W4253202287A5045617018 @default.
• W4253202287 hasAuthorship W4253202287A5055818533 @default.
• W4253202287 hasAuthorship W4253202287A5057504165 @default.
• W4253202287 hasAuthorship W4253202287A5063605514 @default.
• W4253202287 hasAuthorship W4253202287A5064035375 @default.

• next