Aug 1, 2020 · The emission of each halocarbon can be calculated by Equation (3) (Shao et al., 2011): (3) E X = E C O × R × M X M C O where E X and E CO are the emissions of the halocarbon X and CO, respectively; R is the slope of the linear correlation between the enhancements of halocarbon and CO (Δhalocarbon and …

Jun 1, 2021 · LWIR spectral imaging is a high-sensitivity tool for halocarbon detection, identification, tracking, and source attribution. The technique is responsive to the four principal halocarbon classes of consequence in the atmospheric chemistry and climate change realms (CFCs, HCFCs, HFCs, and PFCs) at discrete flux rates of ~0.2–2 kg/h.

Sep 1, 2021 · In order to quantify the impact of halocarbon emissions on ozone layer depletion and global warming, the ODP-weighted emissions and CO 2-equivalent emissions were obtained by multiplying the mass emissions of each substance with their ODP values and 100-yr GWP values, respectively, and their proportions were also calculated, as shown in Fig. 5.

The spatial distribution of halocarbon mixing ratios in major cities across Fujian Province is shown in Fig. 6. High values of total halocarbon concentrations were found in Sanming, Fuzhou, and Xiamen. The distribution of unregulated species was almost identical to the sum, except that there were high value sites in Ningde rather than Fuzhou.

Jun 1, 2018 · Low GWP halocarbon refrigerants: A review of thermophysical properties Revue des propriétés thermophysiques des frigorigènes halocarbures à faible GWP ☆ Author links open overlay panel Sergio Bobbo a , Giovanni Di Nicola b , Claudio Zilio c …

Jun 1, 2014 · 15 halocarbon species were analyzed using both ground-based and aircraft measurements during 2010–2011. Ambient halocarbon concentrations in 47 cities were compared with global background levels. CFC-113 and CFC-114 levels were within 20% enhancement from background, indicating minor emissions in China.

Dec 1, 2013 · Halocarbon samples from the marine atmosphere were collected using a fused-silica lined canister with a ball valve. Samples were collected at 10 m elevation from the sea surface while facing the wind on the top deck of the R/V Dong Fang Hong 2 in the SYS from May 2 to 9, 2012. The cruise track and sampling stations are shown in Fig. 1. All air ...

Mar 1, 2023 · As a number of studies focused on halocarbon variations and source profiles, there is an increasing need to identify halocarbon source origins. In this study, an eight-month regular air sampling was conducted at a coastal site in Hong Kong from November 2020 to June 2021, and seventeen halocarbon species were selected for extensive ...

Jan 1, 2021 · Halocarbon biosensors show great potential for the detection of halogenated pollutants. Despite their benefits, there are certain challenges to these biosensors. Several challenges are common to all biosensors, such as the fragility of biocomponent, difficulty in the resolution of similar analytes, and complexity of environmental matrices [ 110 ].

Mar 20, 2023 · The results show that CH 2 Cl 2 was the most abundant halocarbon (2207 (1116–2848) ppt), followed by CH 3 Cl (912 (683–1043) ppt) and CH 2 ClCH 2 Cl (596 (292–763) ppt). Moreover, the potential source areas of halocarbons in Hangzhou were adjacent cities in Zhejiang and neighboring provinces in the YRD.