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Dive into the research topics where Alma Hodzic is active.

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Featured researches published by Alma Hodzic.


Archive | 2015

Evaluation of New and Proposed Organic Aerosol Sources and Mechanisms using the Aerosol Modeling Testbed. MILAGRO, CARES, CalNex, BEACHON, and GVAX

Alma Hodzic; Jose L. Jimenez

This work investigated the formation and evolution of organic aerosols (OA) arising from anthropogenic and biogenic sources in a framework that combined state-of-the-science process and regional modeling, and their evaluation against advanced and emerging field measurements. Although OA are the dominant constituents of submicron particles, our understanding of their atmospheric lifecycle is limited, and current models fail to describe the observed amounts and properties of chemically formed secondary organic aerosols (SOA), leaving large uncertainties on the effects of SOA on climate. Our work has provided novel modeling constraints on sources, formation, aging and removal of SOA by investigating in particular (i) the contribution of trash burning emissions to OA levels in a megacity, (ii) the contribution of glyoxal to SOA formation in aqueous particles in California during CARES/CalNex and over the continental U.S., (iii) SOA formation and regional growth over a pine forest in Colorado and its sensitivity to anthropogenic NOx levels during BEACHON, and the sensitivity of SOA to (iv) the sunlight exposure during its atmospheric lifetime, and to (v) changes in solubility and removal of organic vapors in the urban plume (MILAGRO, Mexico City), and over the continental U.S.. We have also developed a parameterization of water solubilitymorexa0» for condensable organic gases produced from major anthropogenic and biogenic precursors based on explicit chemical modeling, and made it available to the wider community. This work used for the first time constraints from the explicit model GECKO-A to improve SOA representation in 3D regional models such as WRF-Chem.«xa0less


Archive | 2010

Can 3D Models Predict The Observed Fractions Of Modern And Fossil Carbon In and Near Mexico City

Alma Hodzic; J. A. Lopez Jimenez; Andre S. H. Prevot; Nancy A. Marley; Sasha Madronich; Sönke Szidat


Archive | 2007

Contribution of Dust Particles to the Heterogeneous Removal of Acidic Gases From the Atmosphere During the MIRAGE Experiment

Alma Hodzic; F. M. Flocke; Sasha Madronich; Jerome D. Fast; W. Zheng; Andrew J. Weinheimer; D. D. Montzka; Darin J. Knapp; L. R. Mauldin; Paul O. Wennberg; John D. Crounse; David C. McCabe; Antony D. Clarke; Chris A. Hostetler; John Hair


2015 AGU Fall Meeting | 2015

Impact of Stronger Production and Loss Rates of Secondary Organic Aerosols on their Global Distribution and Budget

Alma Hodzic


Archive | 2013

Influence of dry deposition of semi-volatile organic compounds (VOC) on secondary organic aerosol (SOA) formation in the Mexico City plume

Alma Hodzic; Sasha Madronich; Bernard Aumont; Julia Lee-Taylor; Thomas R. Karl


Archive | 2010

Explicit Modeling of Organic Chemistry and SOA Partitioning in Mexico City

Julia Lee-Taylor; Sasha Madronich; Bernard Aumont; Marie Camredon; Eric C. Apel; Alma Hodzic; Geoffrey S. Tyndall; Richard Valorso


Archive | 2010

Constraining the size distribution of mineral dust aerosols using theory, a compilation of literature measurements, and mesoscale modeling

Jasper F. Kok; Chaoyi Zhao; Alma Hodzic; T. Eidhammer; Jerome D. Fast; Natalie M. Mahowald


Archive | 2010

SOA Measurements vs. Models: A Status Report

J. L. Jimenez; Joost A. de Gouw; Alma Hodzic


Archive | 2009

Modeling the organic aerosol fraction within the Mexico City basin during the MILAGRO field experiment

Alma Hodzic; J. A. Lopez Jimenez; Sasha Madronich; A. C. Aiken; Bertrand Bessagnet; Jerome D. Fast; Jean-Francois Lamarque; Timothy B. Onasch; G. Le Roux; Ingrid M. Ulbrich


Archive | 2009

Modeling of secondary organic aerosols formation during MILAGRO 2006

Katja Dzepina; Alma Hodzic; Sasha Madronich; Rahul A. Zaveri; R. Volkamer; Christopher D. Cappa; J. A. Lopez Jimenez

Collaboration


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Sasha Madronich

National Center for Atmospheric Research

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Jerome D. Fast

Pacific Northwest National Laboratory

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A. C. Aiken

Los Alamos National Laboratory

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Andrew J. Weinheimer

National Center for Atmospheric Research

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Bernard Aumont

University Corporation for Atmospheric Research

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D. D. Montzka

National Center for Atmospheric Research

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Eric C. Apel

National Center for Atmospheric Research

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F. M. Flocke

National Center for Atmospheric Research

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Julia Lee-Taylor

National Center for Atmospheric Research

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L. R. Mauldin

National Center for Atmospheric Research

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