Jesper Baldtzer Liisberg's research while affiliated with IT University of Copenhagen and other places
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Publications (8)
Aerosol chamber experiments show that the ligand-to-metal charge transfer absorption in iron(III) chlorides can lead to the production of chlorine. Based on this mechanism, the photocatalytic oxidation of chloride in mineral dust-sea spray aerosols was recently shown to be the largest source of chlorine over the North Atlantic. However, there has n...
Aerosol chamber experiments show that the ligand-to-metal charge transfer absorption in iron(III) chlorides can lead to the production of chlorine. Based on this mechanism, the photocatalytic oxidation of chloride in mineral dust-sea spray aerosols was recently shown to be the largest source of chlorine over the North Atlantic. However, there has n...
Active chlorine in the atmosphere is poorly constrained and so is its role in the oxidation of the potent greenhouse gas methane, causing uncertainty in global methane budgets. We propose a photocatalytic mechanism for chlorine atom production that occurs when Sahara dust mixes with sea spray aerosol. The mechanism is validated by implementation in...
![Figure 7. The removal efficiency of methane (black), [CCl 4 ] (red) and...](publication/357282666/figure/fig5/AS:1104226256199693@1640279463100/The-removal-efficiency-of-methane-black-CCl-4-red-and-Cl-grey-is-shown-in_Q320.jpg)
The development of laser spectroscopy has made it possible to measure minute changes in the concentrations of trace gases and their isotopic analogs. These single or even multiply substituted species occur at ratios from percent to below parts per million and contain important information concerning trace gas sources and transformations. Due to the...
The development of laser spectroscopy has made it possible to measure minute changes in the concentrations of trace gases and their isotopic analogs. These single or even multiply substituted species occur at ratios from per cent to sub-ppm and contain important information concerning trace gas sources and transformations. Due to their low abundanc...
The isotopic composition of nitrous oxide (N2O) provides useful information for evaluating N2O sources and budgets. Due to the co‐occurrence of multiple N2O transformation pathways, it is, however, challenging to use isotopic information to quantify the contribution of distinct processes across variable spatiotemporal scales. Here, we present an ov...
![Figure 6. Deviations of the measured [N 2 O], δ 15 N α , δ 15 N β and δ...](profile/Joachim-Mohn/publication/341723840/figure/fig5/AS:896364191965198@1590721285680/Deviations-of-the-measured-N-2-O-d-15-N-a-d-15-N-b-and-d-18-O-values-according-to-O_Q320.jpg)
For the past two decades, the measurement of nitrous oxide (N2O)
isotopocules – isotopically substituted molecules 14N15N16O, 15N14N16O and 14N14N18O of the main isotopic species 14N14N16O – has been a promising technique for
understanding N2O production and consumption pathways. The coupling of non-cryogenic and tuneable light sources with differe...
![Fig. 4. Dependency of the measured [N2O], δ 15 N α , δ 15 N β and δ 18...](publication/337771013/figure/fig4/AS:832798516596736@1575566047266/Dependency-of-the-measured-N2O-d-15-N-a-d-15-N-b-and-d-18-O-values-on-laboratory_Q320.jpg)
Abstract. For the past two decades, the measurement of N<sub>2</sub>O isotopocules – isotopically substituted molecules <sup>14</sup>N<sup>15</sup>N<sup>16</sup>O, <sup>15</sup>N<sup>14</sup>N<sup>16</sup>O and <sup>14</sup>N<sup>14</sup>N<sup>18</sup>O of the main isotopic species <sup>14</sup>N<sup>14</sup>N<sup>16</sup>O – has been a promising t...
Citations
... −15 cm 3 molecule −1 s −1 [6,7]. Atomic chlorine, Cl • , removes a few percent by reaction 2 [5,8,9,10]. ...
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... OH + HO 2 ). A chlorine based system [26,27], as shown in figure 2, would overcome these limitations in several ways. First, reaction 2 is ∼15 times faster than reaction 1. ...
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... where δ is the measured isotopic composition. In this equation, we assume that mixing occurs before fractionation, when in reality mixing and fractionation are likely occurring simultaneously depending on the soil pore size distribution and connectivity, the availability of different substrates, and the microbial community present (Denk et al., 2017;Yu et al., 2020;Lewicka-Szczebak et al., 2020). Further uncertainty in the model equation relates to open vs. closed system fractionation, describing renewal of the N 2 O pool relative to the rate of N 2 O consumption (Yu et al., 2020;Lewicka-Szczebak et al., 2020). ...
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... A dual pulsed quantum cascade laser absorption spectrometer (model CW-QC-TILDAS-SC-D), Aerodyne Research Inc., Billerica, MA, US) was used to measure surface N2O fluxes by connecting the instrument in a closed loop with the automated 180 chambers on top of each lysimeter (Harris et al., 2020). The instrument was operated in flow through mode at a flow rate of 1 L/min and each chamber measured separately using a 16-port VICI valve. ...
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... This technique is used for the measurement of the atmospheric pollutants such as CO, N 2 O, HCHO, NO 2 , and SO 2 . (Yoshii et al. 2003;Harris et al. 2019;Davis and McLaren 2020). This section mainly discussed the spectroscopic techniques for measuring the low weighted molecular compounds and ...
