S
Steffen Freitag
Researcher at University of Hawaii at Manoa
Publications - 49
Citations - 1872
Steffen Freitag is an academic researcher from University of Hawaii at Manoa. The author has contributed to research in topics: Aerosol & Environmental science. The author has an hindex of 17, co-authored 33 publications receiving 1501 citations. Previous affiliations of Steffen Freitag include University of Hawaii.
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Journal ArticleDOI
Evaluation of black carbon estimations in global aerosol models
Dorothy Koch,Dorothy Koch,Michael Schulz,Stefan Kinne,Cameron S. McNaughton,J. R. Spackman,Yves Balkanski,Susanne E. Bauer,Susanne E. Bauer,Terje Koren Berntsen,Tami C. Bond,Olivier Boucher,Mian Chin,Antony D. Clarke,N. De Luca,Frank Dentener,Thomas Diehl,Oleg Dubovik,Richard C. Easter,David W. Fahey,Johann Feichter,D. Fillmore,Steffen Freitag,Steven J. Ghan,Paul Ginoux,Sunling Gong,Larry W. Horowitz,Trond Iversen,Trond Iversen,Alf Kirkevåg,Zbigniew Klimont,Yutaka Kondo,Maarten Krol,Xiaohong Liu,Xiaohong Liu,Ron L. Miller,V. Montanaro,Nobuhiro Moteki,Gunnar Myhre,Joyce E. Penner,Judith Perlwitz,Judith Perlwitz,Giovanni Pitari,S. Reddy,Lokesh K. Sahu,H. Sakamoto,Gregory L. Schuster,Joshua P. Schwarz,Øyvind Seland,Philip Stier,Nobuyuki Takegawa,Toshihiko Takemura,C. Textor,J. van Aardenne,Yongjing Zhao +54 more
TL;DR: In this paper, the authors evaluate black carbon (BC) model predictions from the AeroCom model intercomparison project by considering the diversity among year 2000 model simulations and comparing model predictions with available measurements.
Journal ArticleDOI
Soot Particle Studies—Instrument Inter-Comparison—Project Overview
Eben S. Cross,Timothy B. Onasch,Adam T. Ahern,W. Wrobel,Jay G. Slowik,Jason S. Olfert,Daniel A. Lack,Paola Massoli,Christopher D. Cappa,Joshua P. Schwarz,J. Ryan Spackman,David W. Fahey,Arthur J. Sedlacek,A. Trimborn,John T. Jayne,Andrew Freedman,Leah R. Williams,Nga L. Ng,Claudio Mazzoleni,Manvendra K. Dubey,Benjamin T. Brem,Greg Kok,R. Subramanian,Steffen Freitag,Antony D. Clarke,D. A. Thornhill,Linsey C. Marr,Charles E. Kolb,Douglas R. Worsnop,Paul Davidovits +29 more
TL;DR: In this paper, an intercomparison study of instruments designed to measure the microphysical and optical properties of soot particles was completed, and the following mass-based instruments were tested: Couette Centrifugal Particle Mass Analyzer (CPMA), Time-of-Flight Aerosol Mass Spectrometer (TOMS-SMPS), Single Particle Soot Photometer (SP2), Soot Particle-Aerosol mass Spectrometers (SP-AMS) and Photoelectric Aerosols Sensor (PAS2000CE).
Journal ArticleDOI
An overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) project: aerosol–cloud–radiation interactions in the southeast Atlantic basin
Jens Redemann,Robert Wood,Paquita Zuidema,Sarah J. Doherty,Bernadette Luna,Samuel LeBlanc,Michael S. Diamond,Yohei Shinozuka,Ian Y. Chang,Rei Ueyama,Leonhard Pfister,Ju Mee Ryoo,Amie Dobracki,Arlindo da Silva,Karla M. Longo,Karla M. Longo,Meloë Kacenelenbogen,Connor Flynn,Kristina Pistone,Nichola M. Knox,Stuart Piketh,Jim Haywood,Paola Formenti,Marc Mallet,Philip Stier,Andrew S. Ackerman,Susanne E. Bauer,Ann M. Fridlind,Gregory R. Carmichael,Pablo E. Saide,G. A. Ferrada,Steven G. Howell,Steffen Freitag,Brian Cairns,Brent N. Holben,Kirk Knobelspiesse,Simone Tanelli,Tristan L'Ecuyer,Andrew M. Dzambo,Ousmane O. Sy,Greg M. McFarquhar,Greg M. McFarquhar,Michael R. Poellot,Siddhant Gupta,Joseph R. O'Brien,Athanasios Nenes,Athanasios Nenes,Athanasios Nenes,Mary Kacarab,Jenny P. S. Wong,Jenny P. S. Wong,Jennifer D. Small-Griswold,Kenneth L. Thornhill,David Noone,James R. Podolske,K. Sebastian Schmidt,Peter Pilewskie,Hong Chen,S. Cochrane,Arthur J. Sedlacek,Timothy J. Lang,Eric Stith,Michal Segal-Rozenhaimer,Michal Segal-Rozenhaimer,Richard Ferrare,Sharon P. Burton,Chris A. Hostetler,David J. Diner,Felix C. Seidel,Steven Platnick,Jeffrey S. Myers,Kerry Meyer,Douglas A. Spangenberg,Hal Maring,Lan Gao +74 more
TL;DR: The ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) project is a five-year NASA EVS-2 (Earth Venture Suborbital-2) investigation with three Intensive Observation Periods designed to study key atmospheric processes that determine the climate impacts of these aerosols.
Journal ArticleDOI
South East Pacific atmospheric composition and variability sampled along 20° S during VOCALS-REx
Grant Allen,Hugh Coe,Antony D. Clarke,Christopher S. Bretherton,Robert Wood,Steven J. Abel,Paul A. Barrett,P. R. A. Brown,R. C. George,Steffen Freitag,Cameron S. McNaughton,Steven G. Howell,L. Shank,Vladimir N. Kapustin,V. Brekhovskikh,Lawrence I. Kleinman,Y-N Lee,Stephen R. Springston,Thomas Toniazzo,Radovan Krejci,Javier Fochesatto,Glenn E. Shaw,Patricia Krecl,Barbara Brooks,Gavin R. McMeeking,Keith Bower,Paul I. Williams,Jonathan Crosier,Ian Crawford,Paul Connolly,James Allan,D. S. Covert,Alan R. Bandy,Lynn M. Russell,Jamie Trembath,M. Bart,James B. McQuaid,Jian Wang,Duli Chand,Duli Chand +39 more
TL;DR: The VAMOS Ocean-Cloud-Atmosphere-Land Regional Experiment (VOCALS-REx) was conducted from 15 October to 15 November 2008 in the South East Pacific (SEP) region to investigate interactions between l...
Journal ArticleDOI
Organic matter and non-refractory aerosol over the remote Southeast Pacific: oceanic and combustion sources
L. M. Shank,Steven G. Howell,Antony D. Clarke,Steffen Freitag,V. Brekhovskikh,Vladimir N. Kapustin,Cameron S. McNaughton,Teresa Campos,Robert Wood +8 more
TL;DR: In this article, the authors measured submicron aerosol physical and chemical properties in remote marine air from aircraft over the Southeast Pacific during VOCALS-REx in 2008 and the North Pacific during IMPEX in 2006, and aboard a ship in the Equatorial Pacific in 2009.