Fabrication and performance evaluation of a Janus solar-driven steam generator using AgNPs@C composite for sustainable water purification

Desalination, Год журнала: 2023, Номер 573, С. 117204 - 117204

Опубликована: Дек. 5, 2023

Язык: Английский

---

Atmospheric emissions of hexachlorobutadiene in fine particulate matter from industrial sources

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Июнь 4, 2024

Abstract Hexachlorobutadiene (HCBD) is a concerning chemical that included in the United States Toxic Substances Control Act, and Stockholm Convention. Knowledge of sources HCBD insufficient pivotal for accurate inventory implementing global action. In this study, unintentional release source emission factors 121 full-scale industrial plants from 12 industries are investigated. Secondary copper smelting, electric arc furnace steelmaking, hazardous waste incineration show potential large reductions, which found high concentrations > 20 ng/g fine particulate matter study. The highest concentration observed secondary smelting industry (average: 1380 ng/g). Source range 0.008 kg/t coal fire power to 0.680 lead an estimation approximately 8452.8 g emissions annually worldwide achieved. carcinogenic risks caused by countries regions with intensive 1.0-80 times higher than without these industries. These results will be useful formulating effective strategies control.

Язык: Английский

---

Vertical exchange and cross-regional transport of lower-tropospheric ozone over Hong Kong

Atmospheric Research, Год журнала: 2023, Номер 292, С. 106877 - 106877

Опубликована: Июнь 15, 2023

In recent years, the escalating ozone concentrations in urban areas of China have raised significant public concern. Due to lack long-term vertical observation, characteristics distribution and long-range transport are still not well understood. This study utilized 27 years (1994–2020) sounding observations Hong Kong, conjunction with ERA5 reanalysis data HYSPLIT backward model, examine structure three-dimensional cross-regional tropospheric over Kong. During spring, above 850 hPa found be higher than those observed during other seasons. Conversely, below comparatively elevated autumn. The stratospheric-tropospheric exchange (STE) process is a crucial factor contributing high upper troposphere, 46.2% trajectories crossing tropopause becoming concentrated mainly eastern Yunnan–Guizhou Plateau. identified two obvious peaks lower troposphere at approximately 700 hPa. springtime maximum linked from elevations Bay Bengal Indo–China Peninsula, which moves eastward downward under influence southern branch trough. Additionally, transboundary transportation fire emissions Southeast Asia, influenced by monsoon circulation, also contributes observation. autumn occurrs 925 boundary layer dynamics southward low-altitude Pearl River Delta Yangtze regions northeasterly Asian flow. advances our knowledge understanding profile emphasizes importance regionally-joint emission control particularly when meteorology-induced occurs.

Язык: Английский

---

An exploration of meteorological effects on PM2.5 air quality in several provinces and cities in Vietnam

Journal of Environmental Sciences, Год журнала: 2023, Номер 145, С. 139 - 151

Опубликована: Июль 21, 2023

Язык: Английский

---

Wildfire risk assessment using deep learning in Guangdong Province, China

International Journal of Applied Earth Observation and Geoinformation, Год журнала: 2024, Номер 128, С. 103750 - 103750

Опубликована: Март 12, 2024

The severe wildfires that have ravaged Guangdong province, China, present a significant threat to the local ecosystem, socio-economics, and public health. Effective risk assessment is essential for early warning timely prevention in wildfire management, thereby mitigating disaster losses. In this study, we compiled dataset comprising 11,507 historical incidents Province spanning decade (2011–2021) developed deep learning-based model predict likelihood of occurrence region. addition analyzing characteristics throughout year, also trained separate models different seasons analyzed discrepancies contribution driven factors across seasons. Furthermore, performance our was compared with traditional machine learning algorithms. experimental results revealed that: (1) Factors such as relative humidity, temperature, NDVI, precipitation exerted influence on occurrence. (2) impact driving varied (3) Our outperformed models, achieving superior an AUC 0.962.

Язык: Английский

---

Relative Humidity Modulates the Physicochemical Processing of Secondary Brown Carbon Formation from Nighttime Oxidation of Furan and Pyrrole

ACS ES&T Air, Год журнала: 2024, Номер 1(5), С. 426 - 437

Опубликована: Апрель 9, 2024

Light-absorbing secondary organic aerosols (SOAs), also known as brown carbon (BrC), are major components of wildfire smoke that can have a significant impact on the climate system; however, how environmental factors such relative humidity (RH) influence their formation is not fully understood, especially for heterocyclic precursors. We conducted chamber experiments to investigate BrC from nighttime oxidation furan and pyrrole, two primary precursors in wildfires, presence pre-existing particles at RH < 20% ∼ 50%. Our findings revealed increasing significantly affected size distribution dynamics both SOAs, with pyrrole SOA showing stronger potential generate ultrafine via intensive nucleation processes. Higher led increased mass fractions oxygenated compounds suggesting enhanced gas-phase and/or multiphase under humid conditions. Moreover, higher reduced absorption coefficients BrC, contrasting those homocyclic precursors, due non-absorbing high-molecular-weight decreasing molecular chromophores. Overall, our demonstrate unique dependence which may critically modulate radiative effects change.

Язык: Английский

---

Wildfire smoke exposure and mortality burden in the US under future climate change

EarthArXiv (California Digital Library), Год журнала: 2024, Номер unknown

Опубликована: Март 12, 2024

Wildfire activity has increased in the US and is projected to accelerate under future climate change. However, our understanding of impacts change on wildfire smoke health remains highly uncertain. Here we quantify mortality burden due fine particulate matter (PM2.5) We construct an ensemble statistical machine learning models that link PM2.5), empirically estimate PM2.5-mortality relationships using georeferenced data all recorded deaths from 2006 2019. project climate-driven increases PM2.5 could result 27,800 excess (95% confidence interval: 13,100 - 43,400) per year by 2050 a high warming scenario (SSP3-7.0) -- 76% increase relative estimated 2011-2020 averages. Cumulative exceed 700,000 between 2025-2055. When monetized, climate-induced annual damages $244 billion, comparable prior aggregate estimates other economic damage Our research suggests cost be among most important costly consequences US, urgent adaptation priority.

Язык: Английский

---

Mortality Burden From Wildfire Smoke Under Climate Change

Опубликована: Апрель 1, 2024

Wildfire activity has increased in the US and is projected to accelerate under future climate change.However, our understanding of impacts change on wildfire smoke health remains highly uncertain.We quantify past mortality burden due fine particulate matter (PM2.5).We construct an ensemble statistical machine learning models that link variation PM2.5, empirically estimate PM2.5-mortality relationships using georeferenced data all recorded deaths from 2006 2019.We project climate-driven increases PM2.5 could result 27,800 excess per year by 2050 a high warming scenario, 76% increase relative estimated 2011-2020 averages.Cumulative exceed 700,000 between 2025-2055.When monetized, climate-induced annual damages $244 billion mid-century, comparable sum other prior analyses.Our research suggests cost be among most important costly consequences US.

Язык: Английский

---

Use of Unmanned Aerial Systems in Outdoor Firefighting

Fire Technology, Год журнала: 2023, Номер 59(6), С. 2961 - 2988

Опубликована: Июль 27, 2023

Язык: Английский

---

Estimating the impact of a 2017 smoke plume on surface climate over northern Canada with a climate model, satellite retrievals, and weather forecasts

Authorea (Authorea), Год журнала: 2023, Номер unknown

Опубликована: Июнь 8, 2023

In August 2017, a smoke plume from wildfires in British Columbia and the Northwest Territories recirculated persisted over northern Canada for two weeks. We compared full-factorial set of NASA Goddard Institute Space Studies ModelE simulations to satellite retrievals aerosol optical depth carbon monoxide, finding that performance was dependent on model configuration, more so choice injection height approach, scheme biomass burning emissions estimates than horizontal winds nudging. particular, with free-tropospheric injection, mass-based high fire NOx led unrealistically depth. Using paired excluded, we estimated 16 days an 850 000 km2 region, decreased planetary boundary layer heights by between 253 m 547 m, downward shortwave radiation 52 Wm-2 172 Wm-2, surface temperature 1.5 oC 4.9 oC, latter spanning independent estimate operational weather forecasts 3.7 cooling. The strongest climate effects were configurations detailed microphysics stronger first indirect effect.

Язык: Английский

---