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description Publicationkeyboard_double_arrow_right Article , Conference object , Journal 2017 United StatesPublisher:American Chemical Society (ACS) Funded by:DFG | INUIT - Ice Nuclei resear...,DFG| INUIT - Ice Nuclei research UnIT ,[no funder available]Authors:Senchao Lai;
Senchao Lai
Senchao Lai in OpenAIREMichael G. Weller;
Iris Bellinghausen; Kira Ziegler; +17 AuthorsMichael G. Weller
Michael G. Weller in OpenAIRESenchao Lai;
Senchao Lai
Senchao Lai in OpenAIREMichael G. Weller;
Iris Bellinghausen; Kira Ziegler; Kurt Lucas;Michael G. Weller
Michael G. Weller in OpenAIREPascale S. J. Lakey;
Pascale S. J. Lakey
Pascale S. J. Lakey in OpenAIREManabu Shiraiwa;
Manabu Shiraiwa
Manabu Shiraiwa in OpenAIREJanine Fröhlich-Nowoisky;
Joachim Saloga; Rossella Sgarbanti;Janine Fröhlich-Nowoisky
Janine Fröhlich-Nowoisky in OpenAIRENaama Lang-Yona;
Detlef Schuppan; Detlef Schuppan;Naama Lang-Yona
Naama Lang-Yona in OpenAIREKathrin Reinmuth-Selzle;
Kathrin Reinmuth-Selzle
Kathrin Reinmuth-Selzle in OpenAIREChristopher J. Kampf;
Christopher J. Kampf
Christopher J. Kampf in OpenAIREFangxia Shen;
Fangxia Shen
Fangxia Shen in OpenAIREBettina Weber;
Anna T. Kunert;Bettina Weber
Bettina Weber in OpenAIREFobang Liu;
Fobang Liu
Fobang Liu in OpenAIREAlbert Duschl;
Albert Duschl
Albert Duschl in OpenAIREUlrich Pöschl;
Ulrich Pöschl
Ulrich Pöschl in OpenAIREAir pollution and climate change are potential drivers for the increasing burden of allergic diseases. The molecular mechanisms by which air pollutants and climate parameters may influence allergic diseases, however, are complex and elusive. This article provides an overview of physical, chemical and biological interactions between air pollution, climate change, allergens, adjuvants and the immune system, addressing how these interactions may promote the development of allergies. We reviewed and synthesized key findings from atmospheric, climate, and biomedical research. The current state of knowledge, open questions, and future research perspectives are outlined and discussed. The Anthropocene, as the present era of globally pervasive anthropogenic influence on planet Earth and, thus, on the human environment, is characterized by a strong increase of carbon dioxide, ozone, nitrogen oxides, and combustion- or traffic-related particulate matter in the atmosphere. These environmental factors can enhance the abundance and induce chemical modifications of allergens, increase oxidative stress in the human body, and skew the immune system toward allergic reactions. In particular, air pollutants can act as adjuvants and alter the immunogenicity of allergenic proteins, while climate change affects the atmospheric abundance and human exposure to bioaerosols and aeroallergens. To fully understand and effectively mitigate the adverse effects of air pollution and climate change on allergic diseases, several challenges remain to be resolved. Among these are the identification and quantification of immunochemical reaction pathways involving allergens and adjuvants under relevant environmental and physiological conditions.
Environmental Scienc... arrow_drop_down Harvard University: DASH - Digital Access to Scholarship at HarvardArticle . 2017Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/acs.est.6b04908&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen hybrid 221 citations 221 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Environmental Scienc... arrow_drop_down Harvard University: DASH - Digital Access to Scholarship at HarvardArticle . 2017Data sources: Bielefeld Academic Search Engine (BASE)add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/acs.est.6b04908&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2015 United StatesPublisher:American Chemical Society (ACS) Funded by:NSF | CAREER: Chemical Aging of..., EC | PEGASOSNSF| CAREER: Chemical Aging of Biomass Burning Aerosol by Heterogeneous and Photosensitized Heterogeneous Reactions with Atmospheric Trace Gases ,EC| PEGASOSAuthors:Arangio, Andrea M;
Arangio, Andrea M
Arangio, Andrea M in OpenAIRESlade, Jonathan H;
Slade, Jonathan H
Slade, Jonathan H in OpenAIREBerkemeier, Thomas;
Berkemeier, Thomas
Berkemeier, Thomas in OpenAIREPöschl, Ulrich;
+2 AuthorsPöschl, Ulrich
Pöschl, Ulrich in OpenAIREArangio, Andrea M;
Arangio, Andrea M
Arangio, Andrea M in OpenAIRESlade, Jonathan H;
Slade, Jonathan H
Slade, Jonathan H in OpenAIREBerkemeier, Thomas;
Berkemeier, Thomas
Berkemeier, Thomas in OpenAIREPöschl, Ulrich;
Pöschl, Ulrich
Pöschl, Ulrich in OpenAIREKnopf, Daniel A;
Knopf, Daniel A
Knopf, Daniel A in OpenAIREShiraiwa, Manabu;
Shiraiwa, Manabu
Shiraiwa, Manabu in OpenAIREdoi: 10.1021/jp510489z
pmid: 25686209
Multiphase reactions of OH radicals are among the most important pathways of chemical aging of organic aerosols in the atmosphere. Reactive uptake of OH by organic compounds has been observed in a number of studies, but the kinetics of mass transport and chemical reaction are still not fully understood. Here we apply the kinetic multilayer model of gas-particle interactions (KM-GAP) to experimental data from OH exposure studies of levoglucosan and abietic acid, which serve as surrogates and molecular markers of biomass burning aerosol (BBA). The model accounts for gas-phase diffusion within a cylindrical coated-wall flow tube, reversible adsorption of OH, surface-bulk exchange, bulk diffusion, and chemical reactions at the surface and in the bulk of the condensed phase. The nonlinear dependence of OH uptake coefficients on reactant concentrations and time can be reproduced by KM-GAP. We find that the bulk diffusion coefficient of the organic molecules is approximately 10(-16) cm(2) s(-1), reflecting an amorphous semisolid state of the organic substrates. The OH uptake is governed by reaction at or near the surface and can be kinetically limited by surface-bulk exchange or bulk diffusion of the organic reactants. Estimates of the chemical half-life of levoglucosan in 200 nm particles in a biomass burning plume increase from 1 day at high relative humidity to 1 week under dry conditions. In BBA particles transported to the free troposphere, the chemical half-life of levoglucosan can exceed 1 month due to slow bulk diffusion in a glassy matrix at low temperature.
The Journal of Physi... arrow_drop_down eScholarship - University of CaliforniaArticle . 2015Data sources: eScholarship - University of Californiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/jp510489z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 97 citations 97 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert The Journal of Physi... arrow_drop_down eScholarship - University of CaliforniaArticle . 2015Data sources: eScholarship - University of Californiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/jp510489z&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2013 United States, SwitzerlandPublisher:American Geophysical Union (AGU) Richard C. Flagan; John F. Cahill; Jack J. Lin; Haflidi Jonsson;Athanasios Nenes;
Athanasios Nenes
Athanasios Nenes in OpenAIREKimberly A. Prather;
H. T. Duong; J. S. Craven;Kimberly A. Prather
Kimberly A. Prather in OpenAIREAndreas Zuend;
Andreas Zuend
Andreas Zuend in OpenAIREAndrew R. Metcalf;
Andrew R. Metcalf; T. L. Lathem; John H. Seinfeld; Kaitlyn J. Suski;Andrew R. Metcalf
Andrew R. Metcalf in OpenAIREManabu Shiraiwa;
S. P. Hersey;Manabu Shiraiwa
Manabu Shiraiwa in OpenAIREArmin Sorooshian;
Armin Sorooshian
Armin Sorooshian in OpenAIREdoi: 10.1002/jgrd.50307
AbstractAircraft‐based measurements of aerosol composition, either bulk or single‐particle, and both subsaturated and supersaturated hygroscopicity were made in the Los Angeles Basin and its outflows during May 2010 during the CalNex field study. Aerosol composition evolves from source‐rich areas in the western Basin to downwind sites in the eastern Basin, evidenced by transition from an external to internal mixture, as well as enhancements in organic O : C ratio, the amount of organics and nitrate internally mixed on almost all particle types, and coating thickness on refractory black carbon (rBC). Transport into hot, dilute outflow regions leads to significant volatilization of semivolatile material, resulting in a unimodal aerosol comprising primarily oxygenated, low‐volatility, water‐soluble organics and sulfate. The fraction of particles with rBC or soot cores is between 27 and 51% based on data from a Single Particle Soot Photometer (SP2) and Aerosol Time of Flight Mass Spectrometer (ATOFMS). Secondary organics appear to inhibit subsaturated water uptake in aged particles, while CCN activity is enhanced with photochemical age. A biomass‐burning event resulted in suppression of subsaturated hygroscopicity but enhancement in CCN activity, suggesting that BB particles may be nonhygroscopic at subsaturated RH but are important sources of CCN. Aerosol aging and biomass burning can lead to discrepancies between subsaturated and supersaturated hygroscopicity that may be related to mixing state. In the cases of biomass burning aerosol and aged particles coated with secondary material, more than a single parameter representation of subsaturated hygroscopicity and CCN activity is needed.
Caltech Authors (Cal... arrow_drop_down Caltech Authors (California Institute of Technology)Article . 2013Full-Text: https://doi.org/10.1002/jgrd.50307Data sources: Bielefeld Academic Search Engine (BASE)Journal of Geophysical Research AtmospheresArticle . 2013 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/jgrd.50307&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 75 citations 75 popularity Top 10% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Caltech Authors (Cal... arrow_drop_down Caltech Authors (California Institute of Technology)Article . 2013Full-Text: https://doi.org/10.1002/jgrd.50307Data sources: Bielefeld Academic Search Engine (BASE)Journal of Geophysical Research AtmospheresArticle . 2013 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/jgrd.50307&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Journal 2016 United StatesPublisher:American Chemical Society (ACS) Authors: Peng Lin; Sergey A. Nizkorodov;Julia Laskin;
Julia Laskin
Julia Laskin in OpenAIREAlexander Laskin;
+4 AuthorsAlexander Laskin
Alexander Laskin in OpenAIREPeng Lin; Sergey A. Nizkorodov;Julia Laskin;
Julia Laskin
Julia Laskin in OpenAIREAlexander Laskin;
Alexander Laskin
Alexander Laskin in OpenAIREYing Li;
Paige K. Aiona;Manabu Shiraiwa;
Manabu Shiraiwa;Manabu Shiraiwa
Manabu Shiraiwa in OpenAIREpmid: 27704802
Emissions from biomass burning are a significant source of brown carbon (BrC) in the atmosphere. In this study, we investigate the molecular composition of freshly emitted biomass burning organic aerosol (BBOA) samples collected during test burns of sawgrass, peat, ponderosa pine, and black spruce. We demonstrate that both the BrC absorption and the chemical composition of light-absorbing compounds depend significantly on the type of biomass fuels. Common BrC chromophores in the selected BBOA samples include nitro-aromatics, polycyclic aromatic hydrocarbon derivatives, and polyphenols spanning a wide range of molecular weights, structures, and light absorption properties. A number of biofuel-specific BrC chromophores are observed, indicating that some of them may be used as source-specific markers of BrC. On average, ∼50% of the light absorption in the solvent-extractable fraction of BBOA can be attributed to a limited number of strong BrC chromophores. The absorption coefficients of BBOA are affected by solar photolysis. Specifically, under typical atmospheric conditions, the 300 nm absorbance decays with a half-life of ∼16 h. A "molecular corridor" analysis of the BBOA volatility distribution suggests that many BrC compounds in the fresh BBOA have low saturation mass concentration (<1 μg m-3) and will be retained in the particle phase under atmospherically relevant conditions.
Environmental Scienc... arrow_drop_down eScholarship - University of CaliforniaArticle . 2016Data sources: eScholarship - University of Californiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/acs.est.6b03024&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 246 citations 246 popularity Top 1% influence Top 10% impulse Top 1% Powered by BIP!
more_vert Environmental Scienc... arrow_drop_down eScholarship - University of CaliforniaArticle . 2016Data sources: eScholarship - University of Californiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/acs.est.6b03024&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article 2023Publisher:American Chemical Society (ACS) Funded by:NSERCNSERCAuthors:Florence K. A. Gregson;
Nealan G. A. Gerrebos;Florence K. A. Gregson
Florence K. A. Gregson in OpenAIREMeredith Schervish;
Meredith Schervish
Meredith Schervish in OpenAIRESepehr Nikkho;
+7 AuthorsSepehr Nikkho
Sepehr Nikkho in OpenAIREFlorence K. A. Gregson;
Nealan G. A. Gerrebos;Florence K. A. Gregson
Florence K. A. Gregson in OpenAIREMeredith Schervish;
Meredith Schervish
Meredith Schervish in OpenAIRESepehr Nikkho;
Elijah G. Schnitzler; Carley Schwartz; Christopher Carlsten; Jonathan P. D. Abbatt;Sepehr Nikkho
Sepehr Nikkho in OpenAIRESaeid Kamal;
Saeid Kamal
Saeid Kamal in OpenAIREManabu Shiraiwa;
Manabu Shiraiwa
Manabu Shiraiwa in OpenAIREAllan K. Bertram;
Allan K. Bertram
Allan K. Bertram in OpenAIREpmid: 37729583
Smoke particles generated by burning biomass consist mainly of organic aerosol termed biomass burning organic aerosol (BBOA). BBOA influences the climate by scattering and absorbing solar radiation or acting as nuclei for cloud formation. The viscosity and the phase behavior (i.e., the number and type of phases present in a particle) are properties of BBOA that are expected to impact several climate-relevant processes but remain highly uncertain. We studied the phase behavior of BBOA using fluorescence microscopy and showed that BBOA particles comprise two organic phases (a hydrophobic and a hydrophilic phase) across a wide range of atmospheric relative humidity (RH). We determined the viscosity of the two phases at room temperature using a photobleaching method and showed that the two phases possess different RH-dependent viscosities. The viscosity of the hydrophobic phase is largely independent of the RH from 0 to 95%. We use the Vogel-Fulcher-Tamman equation to extrapolate our results to colder and warmer temperatures, and based on the extrapolation, the hydrophobic phase is predicted to be glassy (viscosity >1012 Pa s) for temperatures less than 230 K and RHs below 95%, with possible implications for heterogeneous reaction kinetics and cloud formation in the atmosphere. Using a kinetic multilayer model (KM-GAP), we investigated the effect of two phases on the atmospheric lifetime of brown carbon within BBOA, which is a climate-warming agent. We showed that the presence of two phases can increase the lifetime of brown carbon in the planetary boundary layer and polar regions compared to previous modeling studies. Hence, the presence of two phases can lead to an increase in the predicted warming effect of BBOA on the climate.
Environmental Scienc... arrow_drop_down Environmental Science & TechnologyArticle . 2023 . Peer-reviewedLicense: STM Policy #29Data sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/acs.est.3c03231&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 6 citations 6 popularity Average influence Average impulse Top 10% Powered by BIP!
more_vert Environmental Scienc... arrow_drop_down Environmental Science & TechnologyArticle . 2023 . Peer-reviewedLicense: STM Policy #29Data sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1021/acs.est.3c03231&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu