Glacial dust surpasses both volcanic ash and desert dust in its iron fertilization potential

2021 ◽  
Author(s):  
Bess G. Koffman ◽  
Meg F. Yoder ◽  
Taylor Methven ◽  
Lena Hanschka ◽  
Helen B. Sears ◽  
...  
Keyword(s):  
Volcanic Ash ◽  
Desert Dust ◽  
Iron Fertilization

Glacial dust surpasses both volcanic ash and desert dust in its iron fertilization potential

2020 ◽  
Author(s):  
Bess G. Koffman ◽  
Meg F Yoder ◽  
Taylor Methven ◽  
Lena Hanschka ◽  
Helen B Sears ◽  
...  
Keyword(s):  
Volcanic Ash ◽  
Desert Dust ◽  
Iron Fertilization

scholarly journals Surface ocean iron fertilization: The role of airborne volcanic ash from subduction zone and hot spot volcanoes and related iron fluxes into the Pacific Ocean

2011 ◽  
Vol 25 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Nazlı Olgun ◽  
Svend Duggen ◽  
Peter Leslie Croot ◽  
Pierre Delmelle ◽  
Heiner Dietze ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Subduction Zone ◽  
Volcanic Ash ◽  
Hot Spot ◽  
Surface Ocean ◽  
Iron Fertilization ◽  
The Pacific ◽  
The Pacific Ocean

scholarly journals Observation of volcanic ash from Puyehue–Cordón Caulle with IASI

2013 ◽  
Vol 6 (1) ◽  
pp. 35-46 ◽  
Author(s):  
L. Klüser ◽  
T. Erbertseder ◽  
J. Meyer-Arnek
Keyword(s):  
Remote Sensing ◽  
Southern Hemisphere ◽  
Volcanic Ash ◽  
Singular Vector ◽  
Air Traffic ◽  
Emission Characteristics ◽  
Desert Dust ◽  
Atmospheric Sounding ◽  
Retrieval Scheme ◽  
Ash Plume

Abstract. On 4 June 2011 an eruption of the Chilean volcano complex Puyehue–Cordón Caulle injected large amounts of volcanic ash into the atmosphere and affected local life as well as hemisphere-wide air traffic. Observations of the Infrared Atmospheric Sounding Interferometer (IASI) flown on board of the MetOp satellite have been exploited to analyze the evolution of the ash plume around the Southern Hemisphere. A novel singular vector-based retrieval methodology, originally developed for observation of desert dust over land and ocean, has been adapted to enable remote sensing of volcanic ash. Since IASI observations in the 8–12 μm window are applied in the retrieval, the method is insensitive to solar illumination and therefore yields twice the observation rate of the ash plume evolution compared to solar backscatter methods from polar orbiting satellites. The retrieval scheme, the emission characteristics and the circumpolar transport of the ash are examined by means of a source–receptor analysis.

scholarly journals Observation of volcanic ash from Puyehue-Cordón Caulle with IASI

2012 ◽  
Vol 5 (3) ◽  
pp. 4249-4283 ◽  
Author(s):  
L. Klüser ◽  
T. Erbertseder ◽  
J. Meyer-Arnek
Keyword(s):  
Remote Sensing ◽  
Southern Hemisphere ◽  
Volcanic Ash ◽  
Singular Vector ◽  
Air Traffic ◽  
Emission Characteristics ◽  
Desert Dust ◽  
Atmospheric Sounding ◽  
Retrieval Scheme ◽  
Ash Plume

Abstract. On 4 June 2011 an eruption of the Chilean volcano complex Puyehue-Cordón Caulle injected large amounts of volcanic ash into the atmosphere and affected local life as well as hemisphere-wide air traffic. Observations of the Infrared Atmospheric Sounding Interferometer IASI flown on board of the MetOp satellite have been exploited to analyze the evolution of the ash plume around the Southern Hemisphere. A novel Singular Vector based retrieval methodology, originally developed for observation of desert dust over land and ocean, has been adapted to enable remote sensing of volcanic ash. Since IASI observations in the 8–12 μm window are applied in the retrieval, the method is insensitive to solar illumination and therefore yields twice the observation rate of the ash plume evolution compared to solar backscatter methods from polar orbiting satellites. The retrieval scheme, the emission characteristics and the circumpolar transport of the ash are examined by means of a source-receptor analysis.

Iron fertilization with volcanic ash?

Eos ◽  
1991 ◽  
Vol 72 (47) ◽  
pp. 525-525 ◽  
Author(s):  
C. S. Spirakis
Keyword(s):  
Volcanic Ash ◽  
Iron Fertilization

scholarly journals Retrieving simulated volcanic, desert dust and sea-salt particle properties from two/three-component particle mixtures using UV-VIS polarization lidar and T matrix

2013 ◽  
Vol 13 (14) ◽  
pp. 6757-6776 ◽  
Author(s):  
G. David ◽  
B. Thomas ◽  
T. Nousiainen ◽  
A. Miffre ◽  
P. Rairoux
Keyword(s):  
Volcanic Ash ◽  
Sea Salt ◽  
Water Soluble ◽  
Nonspherical Particles ◽  
Depolarization Ratio ◽  
Component Mixture ◽  
Desert Dust ◽  
Two Component ◽  
T Matrix ◽  
Component Particle

Abstract. During transport by advection, atmospheric nonspherical particles, such as volcanic ash, desert dust or sea-salt particles experience several chemical and physical processes, leading to a complex vertical atmospheric layering at remote sites where intrusion episodes occur. In this paper, a new methodology is proposed to analyse this complex vertical layering in the case of a two/three-component particle external mixtures. This methodology relies on an analysis of the spectral and polarization properties of the light backscattered by atmospheric particles. It is based on combining a sensitive and accurate UV-VIS polarization lidar experiment with T-matrix numerical simulations and air mass back trajectories. The Lyon UV-VIS polarization lidar is used to efficiently partition the particle mixture into its nonspherical components, while the T-matrix method is used for simulating the backscattering and depolarization properties of nonspherical volcanic ash, desert dust and sea-salt particles. It is shown that the particle mixtures' depolarization ratio δ p differs from the nonspherical particles' depolarization ratio δns due to the presence of spherical particles in the mixture. Hence, after identifying a tracer for nonspherical particles, particle backscattering coefficients specific to each nonspherical component can be retrieved in a two-component external mixture. For three-component mixtures, the spectral properties of light must in addition be exploited by using a dual-wavelength polarization lidar. Hence, for the first time, in a three-component external mixture, the nonsphericity of each particle is taken into account in a so-called 2β + 2δ formalism. Applications of this new methodology are then demonstrated in two case studies carried out in Lyon, France, related to the mixing of Eyjafjallajökull volcanic ash with sulfate particles (case of a two-component mixture) and to the mixing of dust with sea-salt and water-soluble particles (case of a three-component mixture). This new methodology, which is able to provide separate vertical profiles of backscattering coefficient for mixed atmospheric dust, sea-salt and water-soluble particles, may be useful for accurate radiative forcing assessments.

Iron fertilization of primary productivity by volcanic ash in the Late Cretaceous (Cenomanian) Western Interior Seaway

Geology ◽  
2018 ◽  
Vol 46 (10) ◽  
pp. 859-862 ◽  
Author(s):  
Zhirui Zeng ◽  
Madison Pike ◽  
Michael M. Tice ◽  
Caitlyn Kelly ◽  
Franco Marcantonio ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Primary Productivity ◽  
Volcanic Ash ◽  
Western Interior Seaway ◽  
Iron Fertilization

scholarly journals Atmospheric ice nuclei in the Eyjafjallajökull volcanic ash plume

2011 ◽  
Vol 11 (1) ◽  
pp. 2733-2748 ◽  
Author(s):  
H. Bingemer ◽  
H. Klein ◽  
M. Ebert ◽  
W. Haunold ◽  
U. Bundke ◽  
...  
Keyword(s):  
Volcanic Ash ◽  
Explosive Volcanism ◽  
Dust Storms ◽  
Radiative Properties ◽  
High Activation ◽  
Activation Temperature ◽  
Desert Dust ◽  
Ice Nuclei ◽  
Weather And Climate ◽  
High Concentrations

Abstract. Explosive volcanism affects weather and climate. Primary volcanic ash particles which act as ice nuclei (IN) can modify the phase and properties of cold tropospheric clouds. During the Eyjafjallajökull volcanic eruption we have measured the highest ice nucleus number concentrations (>600 L) in our record of 2 years of daily IN measurements in central Germany. Even in Israel, located about 5000 km away from Iceland, IN were as high as otherwise only during desert dust storms. These measurements are the only ones available on the properties of IN in the Eyjafjallajökull plume. The measured high concentrations and high activation temperature (−8 °C) point to an important impact of volcanic ash on microphysical and radiative properties of clouds through enhanced glaciation.

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