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#eventresponse

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💧🌏 Greg Cocks

The Detection Of A Massive Harmful Algal Bloom In The Arctic Prompts Real-Time Advisories To Western Alaskan Communities
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phys.org/news/2024-07-massive- <-- shared technical article
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doi.org/10.1002/lol2.10421 <-- shared paper
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#GIS #spatial #mapping #sampling #publichealth #ecosystem #habitat #climatechange #harmful #agalbloom #HAB #polar #marine #healthimpacts #toxins #Arctic #water #hydrospatial #sampling #model #modeling #BeringStrait #magnitude #scale #density #toxicity #coast #coastal #remote #communities #FirstNation #risk #hazard #response #monitoring #hazardassessment #communication #realtime #advisories #Alaska #WesternAlaska #maritime #subsistence #harvest #fisheries #tracking #spatiotemporal #spatialanalysis #WHOI #PST #algae #foodchain #foodweb #mortality #impacts #subsidence #eventresponse #waterquality

model / map - the HAB (harmful algal bloom), Bering Strait, off Alaska coast
photo - A dashboard image from the IFCB shows high concentrations of the Alexandrium (dark round cells) found in a Bering Strait water sample.
maps - Regional map and progression of the 2022 Alexandrium catenella bloom based on near-surface cell densities. (A) Map of the region depicting major water bodies, land masses, and the maritime boundary with Russia. Alaskan communities within designated regional boroughs are indicated by colored points; regional hub communities are labeled in bold. Bloom observations are grouped by the outbound and return transit of each survey, where the gray dots are the shipboard data points; (B) 22 July–08 August, (C) 08–14 August, (D) 17–31 August, (E) 31 August–06 September. Graduated color scale indicates A. catenella cell density calculated from annotated IFCB imagery; observations are interpolated using a gridding routine that puts more weight along the isobaths (Davis 1998), since the flow on the Chukchi shelf is largely guided by the bathymetry. Locations of the regional hub communities are labeled, and an asterisk is used in (D) to indicate location of highest cell density measured in the bloom (174,000 cells L−1).
schematic - Timeline and structure of information flow from the shipboard IFCB to the regional coastal response. Steps in this process included: Data Collection (seconds to minutes), HAB Assessment (minutes to hours), Stakeholder Coordination and Advisory Development (24–48 h, see Supplementary Materials for advisory text), and Community Mobilization (days, weeks, continuing).
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