Recent Advancements in the Emission Characteristics of Forest Ground Smoldering Combustion DOI Open Access

Shuyuan Tang,

Yanlong Shan,

Sainan Yin

et al.

Forests, Journal Year: 2024, Volume and Issue: 15(12), P. 2099 - 2099

Published: Nov. 27, 2024

The occurrence of forest ground smoldering combustion has been increasingly frequent in recent years, resulting significant emissions that have a detrimental impact on the ecological environment. Current research emissions, however, is relatively scarce and fragmented across fields ecology, environmental protection, medicine, forestry. present paper offers comprehensive review methodologies employed emission quantification results, correlation between fire behaviors, potential for identifying through emissions. Due to various factors such as region, characteristics samples, experimental methods, it becomes challenging arrive at accurate conclusions regarding carbon cycle, dynamics smoke plumes, toxicological hazards. limited behaviors hampers development application identification technology based It suggested standardized universal methods studying should be popularized among researchers. In addition, temperature, spread direction, velocity needs further strengthened.

Language: Английский

Nontargeted Screening Nitrogen-Containing Organic Compounds in Frost and Wet Deposition in Rural Northeast China DOI
Runqi Zhang, Dongmei Cai, Lina Wang

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Nitrogen-containing organic compounds (NOCs) in frost serve as a critical pathway for atmospheric nitrogen deposition, significantly impacting the biogeochemical cycles of nitrogen. However, molecular characteristics NOCs and their deposition fluxes are scarcely studied. In this work, samples, collected rural Northeast China winter 2023, were analyzed using nontargeted ultrahigh performance liquid chromatography-orbitrap mass spectrometry (UHPLC-Orbitrap MS) to reveal content nitrogen-containing explore wet fluxes. The average number assigned formulas lager on hazy days compared nonhazy both water-soluble (WSOM) water-insoluble matter (WISOM) (3114 vs. 1934 WSOM 3042 2224 WISOM electrospray ionization (ESI−); 6921 5954 6629 5547 ESI+). Specifically, proportions CHON 35.6–49.9% (724–1517) 47–51.1% (2686–3388) ESI– ESI+ modes, respectively. Nitrophenol (C6H5NO3) methyl nitrophenol (C7H7NO4) most abundant NOCs, with (at maximum concentrations) 22.2 21.2 μg m–2·h–1, On days, reached up 1.73 times that indicating significant ambient during haze episode. This flux positively correlated PM2.5 concentration, implying important role particulates influencing NOC through frost. These findings highlight susceptibility capturing from atmosphere, potentially cycling ecosystems.

Language: Английский

Citations

0
Enhanced sulfate formation in mixed biomass burning and sea-salt interactions mediated by photosensitization: effects of chloride, nitrogen-containing compounds, and atmospheric aging DOI Creative Commons
Rongzhi Tang,

Jialiang Ma,

Ruifeng Zhang

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(1), P. 425 - 439

Published: Jan. 13, 2025

Abstract. Discrepancies persist between modeled simulations and measured sulfate concentrations in the marine boundary layer, especially when air is influenced by biomass burning plumes. However, there has been a notable dearth of research conducted on interactions sea-salt aerosol plumes, impeding comprehensive understanding formation. This work studied formation mixing real (BB) extracts NaCl, mimicking internal mixtures BB particles. BB–NaCl particles had significantly higher rate than incense (IS)–NaCl For fresh particles, followed trend corn straw (CS)–NaCl > rice (RS)–NaCl wheat (WS)–NaCl IS–NaCl. The filter sample aging was achieved exposure to OH• generated from UV irradiation. After aging, RS–NaCl exhibited highest enhancement rates among all due RS NaCl. Bulk aqueous experiments spiked with NaCl using model photosensitizers (PSs) nitrogen-containing organic compounds (NOCs), pyrazine (CHN), 4-nitrocatechol (CHON) revealed positive effects chloride PS–CHON system negative PS–CHN Our suggests that reaching or near coastal areas can affect via photosensitizer-mediated reactions, potentially exacerbating pollution.

Language: Английский

Citations

0
New insights into the molecular characteristics-dependent light absorption variation of water-soluble organic matter in biomass burning smoke DOI
Weifeng Chen, Huiying Zhang,

Shiming Xu

et al.

Atmospheric Research, Journal Year: 2025, Volume and Issue: unknown, P. 107951 - 107951

Published: Jan. 1, 2025

Language: Английский

Citations

0
Insights into the Stabilization of Atmospheric Iron(II) by Water-Soluble Organic Matter: Role of Aliphatic Organosulfates DOI

Shihui Feng,

Rui Liu,

Peijie Yang

et al.

Environmental Science & Technology Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Language: Английский

Citations

0
Wildfire Particulates Enhance Phytoplankton Growth and Alter Communities in the South China Sea Under Wind‐Driven Upwelling DOI

Runqian Peng,

Xiaoyan Chen, Qiuyun Wu

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2024, Volume and Issue: 129(10)

Published: Sept. 30, 2024

Abstract Extreme wildfire events and cyclones are on the rise across tropical regions in response to climate change. Despite assumptions about their impact phytoplankton through nutrient supplies, field evidence is lacking, combined effects remain unclear. In an on‐site microcosm experiment conducted Xisha Islands, South China Sea (SCS) after Typhoon Noru, we observed enhanced growth exposure total suspended particulates (TSP) from wildfires (2 mg/L 6 mg/L) under wind‐driven upwelling conditions. Upwelled nutrients had a limited effect Chl‐a concentration due phosphate depletion, by contrast, TSP contributed enriched nitrogen phosphate, resulting 3.30–5.61‐fold increase Chl‐a. However, upwelled increased diatom‐to‐dinoflagellate ratio initial 11.0 12.7, at low high levels reduced 0.3–0.8 significantly altered communities, with 61.8% of species, including two dominant diatoms, negatively correlated N and/or P supplies. Species diversity declined levels. These findings suggest that primary productivity may come cost community. This study improves understanding simultaneous occurrences multiple extreme marine ecosystems.

Language: Английский

Citations

2
Photoinduced Evolutions of Permafrost-Derived Carbon in Subarctic Thermokarst Pond Surface Waters DOI
Tao Wang, Carmen Kalalian, Xinke Wang

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(39), P. 17429 - 17440

Published: Sept. 18, 2024

In subarctic regions, rising temperature and permafrost thaw lead to the formation of thermokarst ponds, where organics from eroding accumulate. Despite its environmental significance, limited knowledge exists regarding photosensitivity permafrost-derived carbon in these ponds. this study, laboratory experiments were conducted explore photochemical transformations organic matter surface water samples ponds different environments northern Quebec, Canada. One pond near Kuujjuarapik is characterized by presence a collapsing palsa therefore organically rich, while other Umiujaq adjacent lithalsa thus contains fewer matters. Photobleaching occurred sample upon irradiation, whereas exhibited an increase light absorbance at wavelength related aromatic functionalities, indicating aging processes. Ultrahigh-resolution mass spectrometry analysis reveals that preferentially photoproduced highly unsaturated CHO compounds with great aromaticity, irradiated produced higher proportion CHON aromatics reduced nitrogen functionalities. Overall, study illustrates reactivity varies source matter. The observed differences contribute improved understanding emission volatile discovered earlier. Further insights into photoinduced evolutions may require classification therein.

Language: Английский

Citations

1
Recent Advancements in the Emission Characteristics of Forest Ground Smoldering Combustion DOI Open Access

Shuyuan Tang,

Yanlong Shan,

Sainan Yin

et al.

Forests, Journal Year: 2024, Volume and Issue: 15(12), P. 2099 - 2099

Published: Nov. 27, 2024

The occurrence of forest ground smoldering combustion has been increasingly frequent in recent years, resulting significant emissions that have a detrimental impact on the ecological environment. Current research emissions, however, is relatively scarce and fragmented across fields ecology, environmental protection, medicine, forestry. present paper offers comprehensive review methodologies employed emission quantification results, correlation between fire behaviors, potential for identifying through emissions. Due to various factors such as region, characteristics samples, experimental methods, it becomes challenging arrive at accurate conclusions regarding carbon cycle, dynamics smoke plumes, toxicological hazards. limited behaviors hampers development application identification technology based It suggested standardized universal methods studying should be popularized among researchers. In addition, temperature, spread direction, velocity needs further strengthened.

Language: Английский

Citations

0