EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/23/2019 | 2:15 PM - 2:30 PM | LONG-TERM ALGAE DYNAMICS THROUGH A LANDSAT LENS | 150 G
LONG-TERM ALGAE DYNAMICS THROUGH A LANDSAT LENS
Harmful algal blooms (HABs) and nuisance algal blooms (NABs) are a worldwide phenomenon with implications for human health and safety. HABs occur when cyanobacteria grow in dense enough to produce toxins. Cyanobacterial biomass has increased worldwide in recent decades, raising concern about the future of fresh- and marine-water systems in a changing climate. Understanding the patterns of past algal blooms can provide useful insights for managing future blooms. Remote sensing can enhance our understanding of the spatiotemporal distribution of NABs. We used images from the USGS Landsat Collections available in the Google Earth Engine for cloud processing. We estimated chlorophyll-a using 299 images taken over 36 years and performed an emerging hot spot analysis in ArcGIS. Our analysis indicates that there has been an upward trend in chlorophyll-a (chl-a) concentrations near the eastern shoreline of Utah Lake over the time span of this study, rendering it an enduring hot spot. The remainder of the lake is a cold spot, showing low mean chl-a concentrations over time. Further analysis will explore factors relating to the timing and intensity of blooms in individual growing seasons over the timespan of this study.
- Hotspot
- Spatial
- Remote Sensing
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Presenters/Authors
Shanae Tate
(), Brigham Young University, r.shanae.tate@gmail.com;
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Mark Jackson
(), Brigham Young University, mark_jackson@byu.edu;
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Neil Hansen
(), Brigham Young University, neil_hansen@gmail.com;
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Carly Hansen
(), University of Utah, carlyahansen@gmail.com;
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