Gasso Santiago

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  • Article
    Glacial flour dust storms in the Gulf of Alaska : hydrologic and meteorological controls and their importance as a source of bioavailable iron
    (American Geophysical Union, 2011-03-18) Crusius, John ; Schroth, Andrew W. ; Gasso, Santiago ; Moy, Christopher M. ; Levy, Robert C. ; Gatica, Myrna
    Iron is an essential micronutrient that limits primary productivity in much of the ocean, including the Gulf of Alaska (GoA). However, the processes that transport iron to the ocean surface are poorly quantified. We combine satellite and meteorological data to provide the first description of widespread dust transport from coastal Alaska into the GoA. Dust is frequently transported from glacially-derived sediment at the mouths of several rivers, the most prominent of which is the Copper River. These dust events occur most frequently in autumn, when coastal river levels are low and riverbed sediments are exposed. The dust plumes are transported several hundred kilometers beyond the continental shelf into iron-limited waters. We estimate the mass of dust transported from the Copper River valley during one 2006 dust event to be between 25–80 ktons. Based on conservative estimates, this equates to a soluble iron loading of 30–200 tons. We suggest the soluble Fe flux from dust originating in glaciofluvial sediment deposits from the entire GoA coastline is two to three times larger, and is comparable to the annual Fe flux to GoA surface waters from eddies of coastal origin. Given that glaciers are retreating in the coastal GoA region and in other locations, it is important to examine whether fluxes of dust are increasing from glacierized landscapes to the ocean, and to assess the impact of associated Fe on marine ecosystems.
  • Working Paper
    US SOLAS Science Report
    (Woods Hole Oceanographic Institution, 2021-12) Stanley, Rachel H. R. ; Bell, Tom G. ; Gao, Yuan ; Gaston, Cassandra J. ; Ho, David T. ; Kieber, David J. ; Mackey, Katherine R. M. ; Meskhidze, Nicholas ; Miller, William L. ; Potter, Henry ; Vlahos, Penny ; Yager, Patricia L. ; Alexander, Becky ; Beaupre, Steven R. ; Craig, Susanne E. ; Cutter, Gregory A. ; Emerson, Steven ; Frossard, Amanda A. ; Gasso, Santiago ; Haus, Brian K. ; Keene, William C. ; Landing, William M. ; Moore, Richard H. ; Ortiz-Suslow, David ; Palter, Jaime B. ; Paulot, Fabien ; Saltzman, Eric ; Thornton, Daniel ; Wozniak, Andrew S. ; Zamora, Lauren M. ; Benway, Heather M.
    The Surface Ocean – Lower Atmosphere Study (SOLAS) ( is an international research initiative focused on understanding the key biogeochemical-physical interactions and feedbacks between the ocean and atmosphere that are critical elements of climate and global biogeochemical cycles. Following the release of the SOLAS Decadal Science Plan (2015-2025) (Brévière et al., 2016), the Ocean-Atmosphere Interaction Committee (OAIC) was formed as a subcommittee of the Ocean Carbon and Biogeochemistry (OCB) Scientific Steering Committee to coordinate US SOLAS efforts and activities, facilitate interactions among atmospheric and ocean scientists, and strengthen US contributions to international SOLAS. In October 2019, with support from OCB, the OAIC convened an open community workshop, Ocean-Atmosphere Interactions: Scoping directions for new research with the goal of fostering new collaborations and identifying knowledge gaps and high-priority science questions to formulate a US SOLAS Science Plan. Based on presentations and discussions at the workshop, the OAIC and workshop participants have developed this US SOLAS Science Plan. The first part of the workshop and this Science Plan were purposefully designed around the five themes of the SOLAS Decadal Science Plan (2015-2025) (Brévière et al., 2016) to provide a common set of research priorities and ensure a more cohesive US contribution to international SOLAS.