Special Issue "Atmospheric Nutrients: Sources, Processes and Impact on Terrestrial and Marine Ecosystems"
A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Biosphere/Hydrosphere/Land - Atmosphere Interactions".
Deadline for manuscript submissions: 31 May 2019
Prof. Dr. Maria Kanakidou
Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, Heraklion, Greece
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Fax: + 30 2810 5451 66
Interests: atmospheric chemistry and climate changes due to human activities and gas/particle interactions; chemistry of the upper troposphere; human-driven changes in the oxidizing power of the atmosphere and the aerosol composition and their interactions with climate
Every year, millions of tons of aerosol particles are transported to remote oceans and terrestrial ecosystems, such as the Southern Ocean and the Amazon forest. These particles, once deposited, provide the ecosystems with an external source of nutrients, such as iron, phosphorus, and nitrogen. This may stimulate primary production (a plant’s ability to produce complex organic compounds from water, carbon dioxide, and simple nutrients) and enhances carbon uptake and thus indirectly affects the climate.
Measurement and modelling studies in the past 30 years have clearly demonstrated the importance of atmospheric nutrients in global biogeochemical cycles and the Earth system. However, there are still major uncertainties in the flux of atmospheric nutrients to the ecosystems, particularly those from anthropogenic and biogenic sources. The impacts of atmospheric nutrients on ecosystems and the climate are also poorly understood.
In this Special Issue, we welcome manuscripts on laboratory, field and modelling studies of atmospheric nutrients on the following themes:
- Sources and emissions of total and bioavailable atmospheric nutrients from both natural and anthropogenic sources.
- Physical and chemical processes in the source emissions and the atmosphere that affect the production (e.g., solubilization of nutrients), transport and deposition of atmospheric nutrients.
- Deposition of total and bioavailable atmospheric nutrients to the ecosystems, in particular those that are sensitive to external nutrient inputs.
- Impacts of atmospheric nutrients on the ocean, terrestrial ecosystems and the climate.
Dr. Zongbo Shi
Prof. Dr. Maria Kanakidou
Manuscript Submission Information
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- earth system
- terrestrial ecosystems
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Tentative Title: Estimations of ocean primary productivity associated with spring Asian dust events in the western North Pacific and potential export production: A case study of spring 2016-2017
Authors: Joo-Eun Yoon and Il-Nam Kim*
Affiliation: Department of Marine Science, Incheon National University, Incheon, South Korea
Preliminary Abstract: Generally, the input of aeolian dust is expected to temporarily enhance ocean primary productivity by relieving the iron stress that acts as a limiting factor on growth of the phytoplanktons. Especially, as the western North Pacific Ocean (WNPO) is located downwind from the source regions (i.e., Taklimakan and Gobi Deserts) of Asian dust, the second largest dust source globally, the WNPO is an ideal place to accurately find out the response of open waters to these events. Recent study in the WNPO suggested that strong spring dust events can increase ocean productivity by more than 70% as compared to the weak/non-dust conditions. Here we report on two strong spring dust events in the WNPO that occurred in 2016-2017 year. Two strong events were observed using satellite aerosol index to specify occurrences and transports of dust events. Our results indicate that the distribution of dust events was in agreement with spatial patterns of massive phytoplankton blooms with a lag of ~10 days and these blooms resulted in enhancement of potential ocean export production. These results improve understanding of the linkage between atmospheric deposition derived fertilization effects and biological pump in the WNPO.
Tentative Title: Spatial and Seasonal Variability in Labile Iron Deposition and Contribution to Sea-surface Soluble Iron Distributions
Authors: Yan Feng1, Beth Drewniak1 and Akinori Ito2
Affiliation: 1Argonne National Laboratory, Argonne, IL, USA; 2Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
Preliminary Abstract: Comparison of the iron (Fe) distributions from global ocean biogeochemistry models reveals substantial inter-model variability in the input fluxes of soluble iron (sFe). It leads to a wide range of the Fe residence times across the models, and has important implications for predicting response of ecosystems and global carbon cycling to perturbations of Fe supply. In the present study, we examine the spatial and seasonal variability in predicted sFe deposition from 6 CMIP5 models, all including dust sources with a fixed Fe solubility, compared with chemical transport model simulations. Three CMIP5 models (CESM1, HadGEM2 and GFDL-ESM2M) predict the largest Fe deposition in the subtropical NE Atlantic and the Arabian Sea, while more Fe is predicted by the other three models (MPI-ESM, CNRM-CM5 and IPSL-CSM5A) to deposit to the mid latitude North Pacific and the Mediterranean Sea. Sensitivity studies with a chemical transport model suggest that inclusion of dust Fe dissolution schemes and combustion sFe sources modifies the predicted sFe deposition in both magnitude and spatial distribution, and the uncertainty is comparable to the inter-model variability due to the dust sources alone. Furthermore, we show that the model differences in sFe deposition are not reflected consistently on the predicted sea-surface dissolved Fe (dFe). In addition to better agreement in the global mean dFe suggested in the previous studies, the spatial and seasonal variability in the dFe distributions across the models is shown to be decreased. Locations with high concentrations of dFe are generally not co-located with large deposition of sFe. But the extent of the dFe distribution deviated from the sFe deposition vary significantly from one model to another. This implies that response of sea-surface dFe distributions to anthropogenic influences (through dust Fe dissolution or combustion sources) depend on the model representation of Fe cycle in the ocean.