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Anne M. Johansen
Researcher at Central Washington University
Publications - 25
Citations - 2022
Anne M. Johansen is an academic researcher from Central Washington University. The author has contributed to research in topics: Aerosol & Deposition (aerosol physics). The author has an hindex of 17, co-authored 25 publications receiving 1834 citations. Previous affiliations of Anne M. Johansen include California Institute of Technology & University of Oslo.
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Journal ArticleDOI
Atmospheric Iron Deposition: Global Distribution, Variability, and Human Perturbations*
Natalie M. Mahowald,Sebastian Engelstaedter,Chao Luo,Andrea Sealy,Paulo Artaxo,Claudia R. Benitez-Nelson,Sophie Bonnet,Ying Chen,Patrick Y. Chuang,David D. Cohen,François Dulac,Barak Herut,Anne M. Johansen,Nilgun Kubilay,Rémi Losno,Willy Maenhaut,Adina Paytan,Joseph M. Prospero,Lindsey M. Shank,Ronald L. Siefert +19 more
TL;DR: The results imply that humans could be substantially impacting iron and bioavailable iron deposition to ocean regions, but there are large uncertainties in the authors' understanding.
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An extensive bloom of the N2-fixing cyanobacterium Trichodesmium erythraeum in the central Arabian Sea
Douglas G. Capone,Ajit Subramaniam,Joseph P. Montoya,Maren Voss,Christoph Humborg,Anne M. Johansen,Ronald L. Siefert,Edward J. Carpenter +7 more
TL;DR: A preliminary extrapolation based on observed, non-bloom rates of N, fixation from limited sampling in the spring intermonsoon suggest N2 fixation may account for an input of about 1 Tg N yr-I, which is substantial, but relatively minor compared to current estimates of the removal of N through denitrification in the basin.
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Chemical characterization of ambient aerosol collected during the southwest monsoon and intermonsoon seasons over the Arabian Sea: Labile-Fe(II) and other trace metals
TL;DR: In this article, the authors used a high-volume dichotomous virtual impactor with an aerodynamic cutoff size of 3 μm to collect the fine and coarse aerosol fractions for metal analysis.
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Chemical composition of aerosols collected over the tropical North Atlantic Ocean
TL;DR: In this article, the authors collected a tropical northern Atlantic Ocean during the month of April 1996 onboard the R/V Seward Johnson and analyzed high volume collector samples for ferrous iron immediately after collection, while trace metals, anions, and cations were determined upon return to the laboratory.
Journal ArticleDOI
A revised nitrogen budget for the Arabian Sea
Hermann W. Bange,Tim Rixen,Anne M. Johansen,Ronald L. Siefert,Ramachandran Ramesh,Venugopalan Ittekkot,Michael R. Hoffmann,Meinrat O. Andreae +7 more
TL;DR: In this article, the authors present estimates of various sources and sinks such as atmospheric dry and wet depositions of N aerosols, pelagic denitrification, nitrous oxide (N2O) emissions, and advective N input from the south.