USAP-DC

The research seeks to further quantify the input of atmospheric Fe into the sparsely sampled Southern Ocean (SO), specifically in the vicinity of the West Antarctic Peninsula (WAP) and adjacent continental shelf waters in the Drake Passage. This is typically a high nutrient low chlorophyll region where surface trace metal and primary productivity data are suggestive of Fe limitation. The WAP is characterized by high productivity in the austral summer, and at this time may be in the path of northern dust (aeolian Fe) input or subject to melt influx of elevated Fe accumulated from glacial and present-day sea ice sources.

Primary scientific questions are: (1) to what extent does atmospheric Fe contribute to nutrient cycles and ecosystem dynamics in the SO? (2) How is warming climate occurring in the WAP affecting the aerosol composition of the maritime atmosphere. The primary productivity of the Southern Ocean is key to understanding oceanic uptake of anthropogenic greenhouse gases such as carbon dioxide.

Person	Role
Gao, Yuan	Investigator and contact

Antarctic Ocean and Atmospheric Sciences

Award # 1341494

USAP-1341494_1

None in the Database

Repository	Title (link)	Format(s)	Status
USAP-DC	Concentrations and Particle Size Distributions of Aerosol Trace Elements	Excel	exists
USAP-DC	Particle sizes of aerosol iron	Excel	exists

1. Gao, Y., Yu, S., Sherrell, R. M., Fan, S., Bu, K., & Anderson, J. R. (2020). Particle‐Size Distributions and Solubility of Aerosol Iron Over the Antarctic Peninsula During Austral Summer. Journal of Geophysical Research: Atmospheres, 125(11). (doi:10.1029/2019jd032082)
2. Ingall, E., Feng, Y., Longo, A., Lai, B., Shelley, R., Landing, W., … Castorina, E. (2018). Enhanced Iron Solubility at Low pH in Global Aerosols. Atmosphere, 9(5), 201. (doi:10.3390/atmos9050201)
3. Fan, S., Gao, Y., Sherrell, R.M., Yu, S., and Bu, K. Concentrations, Particle-Size Distributions, and Dry Deposition Fluxes of Aerosol Trace Elements over the Antarctic Peninsula (2021). Atmospheric Chemistry and Physics, 21, 2105-2124. (doi:10.5194/acp-21-2105-2021)
4. Deng, J., Gao, Y., Zhu, J., Li, L., Yu, S., Kawamura, K., & Fu, P. (2021). Molecular Markers for Fungal Spores and Biogenic SOA over the Antarctic Peninsula: Field Measurements and Modeling Results, Science of the Total Environment. (doi:1016/j.scitotenv.2020.143089)
5. Xu*, G., Chen, L., Xu, T., He, S. and Gao, Y. (2021). Distributions of Water-Soluble Ions in Size-Aggregated Aerosols over the Southern Ocean and Coastal Antarctica, Environmental Science: Processes & Impact, 23, 1316-1327. (doi:10.1039/D1EM00089F)
6. Fan*, S., Gao, Y., Lai, B., Elzinga, E.J. and Yu, S. (2022). Aerosol iron speciation and seasonal variation of iron oxidation state over the western Antarctic Peninsula, Science of the Total Environment, 824, http://dx.doi.org/10.1016/j.scitotenv.2022.153890. (doi:10.1016/j.scitotenv.2022.153890)