A5022748753- Atmospheric chemistry and aerosols
- Mercury impact and mitigation studies
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Toxic Organic Pollutants Impact
- Atmospheric aerosols and clouds
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Vehicle emissions and performance
- Crystallization and Solubility Studies
- Organic Electronics and Photovoltaics
- Molecular Sensors and Ion Detection
- X-ray Diffraction in Crystallography
- Conducting polymers and applications
- Air Quality Monitoring and Forecasting
- Plant responses to elevated CO2
- Climate variability and models
- Marine animal studies overview
- Meteorological Phenomena and Simulations
- Laser-induced spectroscopy and plasma
- Oceanographic and Atmospheric Processes
- Heavy Metal Exposure and Toxicity
- Analytical chemistry methods development
- Heavy metals in environment
State University of New York
2014-2024
York University
2014-2024
SUNY College of Environmental Science and Forestry
2014-2024
Dalian Minzu University
2022-2024
Jilin University
2020-2024
Second Hospital of Shandong University
2024
State Key Laboratory of Supramolecular Structure and Materials
2022-2023
Northeast Normal University
2016-2022
Faculty (United Kingdom)
2018-2020
Nanjing University
2013-2019
[1] The sea breeze system (SBS) occurs at coastal locations throughout the world and consists of many spatially temporally nested phenomena. Cool marine air propagates inland when a cross-shore mesoscale (2–2000 km) pressure gradient is created by daytime differential heating. circulation also characterized rising currents front diffuse sinking well out to usually closed seaward flow aloft. Coastal impacts include relief from oppressive hot weather, development thunderstorms, changes in...
From August 22 to September 16, 2012, atmospheric mercury (Hg) was measured from a common manifold in the field during Reno Atmospheric Mercury Intercomparison eXperiment. Data were collected using Tekran systems, laser induced fluorescence, and evolving new methods. The latter included University of Washington-Detector for Oxidized Mercury, Houston instrument, filter-based system under development by Nevada-Reno. Good transmission total Hg found manifold. However, despite application...
Abstract Investigating sulfate formation processes is important not only for air pollution control but also understanding the climate system. Although mechanisms of secondary production have been widely studied, in situ observational evidence implicating an role NO 2 SO oxidation real atmosphere has rare. In this study, we report two unique cases, from intensive campaign conducted at Station Observing Regional Processes Earth System (SORPES) East China, showing distinctly different by and...
Abstract. Nitrous acid (HONO) plays a key role in atmospheric chemistry by influencing the budget of hydroxyl radical (OH). In this study, two-month measurement HONO and related quantities were analyzed during biomass burning season 2012 at suburban site western Yangtze River delta, eastern China. An overall high concentration with mean value 0.76 ppbv (0.01 to 5.95 ppbv) was observed. During (BB) periods, both HONO/NO2 ratio enhanced significantly (more than factor 2, p < 0.01) compared...
Abstract. Quantum calculations are used to determine the stability of reactive gaseous mercury (Hg(II)) compounds likely be formed in Br-initiated oxidation elemental (Hg(0)). Due absence any evidence, current models neglect possible reaction BrHg with abundant radicals such as NO, NO2, HO2, ClO, or BrO. The present work demonstrates that forms stable compounds, BrHgY, all these except NO. Additional on analogous ClHgY reveal strength XHg-Y bond (for X = Cl, Br) varies little identity...
ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTProgress on Understanding Atmospheric Mercury Hampered by Uncertain MeasurementsDaniel A. Jaffe*†‡, Seth Lyman§, Helen M. Amos∥, Mae S. Gustin⊥, Jiaoyan Huang⊥, Noelle E. Selin#, Leonard Levin∇, Arnout ter Schure○, Robert P. Mason◆, Talbot¶, Andrew Rutter∞, Brandon Finley†, Lyatt Jaeglé‡, Viral Shah‡, Crystal McClure‡, Jesse Ambrose†, Lynne Gratz†, Steven Lindberg$, Peter Weiss-Penzias⊗, Guey-Rong Sheu∀, Dara Feddersen⧓, Milena Horvat◘, Ashu...
The western Pacific subtropical high (WPSH) is regarded as the key circulation system that dominates summer heat waves over eastern China, but whether WPSH–summer wave connection changes with time remains unknown. In this study, decadal variations in WPSH–heat were examined for period 1959–2016 using daily maximum temperature data from 654 observational stations across China and global reanalysis datasets. results show correlation coefficient between WPSH intensity (WPSHI) number of...
Abstract. Multi-year time series records of C2-C6 alkanes, C2-C4 alkenes, ethyne, isoprene, C6-C8 aromatics, trichloroethene (C2HCl3), and tetrachloroethene (C2Cl4) from canister samples collected during January 2004–February 2008 at the University New Hampshire (UNH) AIRMAP Observatory Thompson Farm (TF) in Durham, NH are presented. The objectives this work to identify sources nonmethane hydrocarbons (NMHCs) halocarbons observed TF, characterize seasonal interannual variability ambient...
Continuous measurements of atmospheric aerosols were made in Nanjing, a megacity China, from 18 January to April, 2011 (Phase 1) and 22 April 21 2012 2). Aerosol characteristics, optical properties, direct radiative forcing (DRF) studied through interpretations these measurements. We found that during Phase 1, mean PM2.5, black carbon (BC), aerosol scattering coefficient (Bsp) Nanjing 76.1 ± 59.3 μg m−3, 4.1 2.2 170.9 105.8 M m−1, respectively. High pollution episodes occurred Spring Lantern...
Abstract. Long-term continuous measurements of total gaseous mercury (TGM = elemental (GEM) + reactive (RGM)) were conducted simultaneously along with meteorological variables and a suite trace gases at an urban site in Nanjing, China from 18 January to 31 December 2011. Measurements using high resolution vapor analyzer (Tekran 2537B) 5-min time resolution. The average concentration TGM was 7.9 ± 7.0 ng m−3 range 0.8–180 over the study period. concentrations followed typical lognormal...
Airborne microplastics (MPs) have the potential to travel a long distance and undergo several cloud processes through atmospheric transport. However, little is known about interactions between MPs clouds. Here, we present field evidence for presence of abundant various in cloudwater samples collected at Mt. Tai (1545 m asl.) eastern China, with an average concentration 463 MP L–1 cloudwater, i.e., 0.21 m–3 air. The had broad size range 8–1542 μm 60% being smaller than 100 dominant shapes...
Data obtained from spring 2001 to summer 2003 in New England by the Atmospheric Investigation, Regional Modeling, Analysis and Prediction (AIRMAP) program were used document diurnal characteristics of O 3 , CO 2 NO, during selected intervals hydrocarbon oxygenated species. The cycles species showed a monotonic rise mixing ratio following sunrise (replenishment) that was mirrored nighttime removal (depletion) under nocturnal inversion. median depletion rate 4.9 ppbv h −1 compared...
We have identified terrestrial sources of methyl iodide (CH 3 I) and assessed their importance in its atmospheric budget using a synthesis field observations. Measurements include those from NASA DC‐8 research flights over the United States North Atlantic, AIRMAP long‐term ground‐observing network New England, campaign at Duke Forest, Carolina. found an average CH I flux ∼2,700 ng m −2 d −1 to atmosphere midlatitude vegetation soils, value similar magnitude previous estimates oceanic source...
Abstract. Factors influencing diurnal to interannual variability in Hg° over New England were investigated using multi-year measurements conducted by AIRMAP at the Thompson Farm (TF) coastal site, an inland elevated site Pac Monadnock (PM), and two month on Appledore Island (AI) Gulf of Maine. Mixing ratios TF showed distinct seasonality with maxima March minima October. AI tracked trend but higher minima, while PM annual cycles dampened. In winter, was correlated most strongly CO NOy,...
Abstract. Summertime atmospheric toluene enhancements at Thompson Farm in the rural northeastern United States were unexpected and resulted a toluene/benzene seasonal pattern that was distinctly different from of other anthropogenic volatile organic compounds. Consequently, three hydrocarbon sources investigated for potential contributions to during 2004–2006. These included: (1) increased warm season fuel evaporation coupled with changes reformulated gasoline (RFG) content meet US EPA...
The relationship between synoptic‐scale circulation patterns and surface ozone (O 3 ) across the northeastern United States was investigated for summers 2000–2004. Observational data consisted of 1200 UT sea level pressure fields obtained from National Centers Environmental Prediction Global Final Analysis O measurements 474 Protection Agency five AIRMAP monitoring sites. most common patterns, or map types (I–V), were identified with a correlation‐based synoptic categorization technique,...
Abstract. We conducted measurements of Hg0 and RGM at two inland sites, Thompson Farm (TF) Pac Monadnock (PM), a marine site (Appledore Island (AI)) from the UNH AIRMAP observing network in New Hampshire 2007. Measurements other important trace gases meteorological variables were used to help understand influences on atmospheric Hg budget England. Seasonal variation both species observed TF PM is attributable such factors as seasonal deposition strength, conditions biogenic emissions. varied...
Abstract. Seven C1-C5 alkyl nitrates were measured both on the mainland and off coast of New Hampshire using gas chromatographic techniques. Five separate data sets are presented to characterize seasonal diurnal trends major sources loss processes these compounds. Based in situ measurements conducted at University (UNH) Atmospheric Observing Station Thompson Farm (TF) located southeast NH during winter (January–February) 2002, summer (June–August) (July–August) 2004, daily canister samples...
Abstract. A comprehensive measurement study of mercury wet deposition and size-fractionated particulate (HgP) concurrent with meteorological variables was conducted from June 2011 to February 2012 evaluate the characteristics in urban Nanjing, China. The volume-weighted mean (VWM) concentration rainwater 52.9 ng L−1 a range 46.3–63.6 L−1. per unit area averaged 56.5 μg m−2 over 9 months, which lower than that most Chinese cities, but much higher annual North America Japan. flux exhibited...
A study was conducted to compare measuring particulate mercury (HgP) with the manual filter method and automated Tekran system. Simultaneous measurements were Teflon methodologies in marine coastal continental atmospheres. Overall, HgP values on average 21% higher than HgP, >85% of data outside ±25% region surrounding 1:1 line. In some cases as much 3-fold greater,