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DTSTART;TZID=America/New_York:20230822T130000
DTEND;TZID=America/New_York:20230822T133000
DTSTAMP:20260506T015419
CREATED:20230717T183426Z
LAST-MODIFIED:20230817T183740Z
UID:4257-1692709200-1692711000@www.cessrst.org
SUMMARY:NOAA Seminar Series: Remote sensing of anthropogenic debris in stream channels
DESCRIPTION:Title: Remote sensing of anthropogenic debris in stream channels \nSpeaker: Elena Aguilar\, NOAA EPP/MSI CESSRST-II Fellow at SDSU \nDate: August 22\, 20223 \nTime: 1:30 PM ET \nVenue: Virtual \nMeeting Link :  meet.google.com/ead-ypxo-gvb \nPhone Number\n(‪US‬)‪+1 219-321-0478‬\nPIN: ‪651 945 406#‬ \nLearn more about the speaker \nAbstract: \nInadequate management of anthropogenic waste is a challenge for coastal waters in the US-Mexico border region. Managing waste requires detecting and monitoring locations where uncontrolled disposal and debris accumulation occurs at high rates. Watershed-scale remote sensing can aid the understanding of the distribution\, pools\, and fluxes of plastic materials in pluvial systems. The Los Laureles Canyon watershed (LLCW)\, located in Tijuana\, Mexico\, is a large source of plastic pollution for the Tijuana River Estuary in Imperial Beach\, California. Through a combination of field\, laboratory\, and remote sensing methods\, we identified surficial plastic materials and waste hotspots in LLCW and 6 visually assessed the utility of spectral mixture models and WorldView-3 (WV3) shortwave infrared (SWIR) broadband imagery for plastic mapping. Field trash surveys conducted in LLCW reveal channel reaches have large scale waste patches (4-10m²) as a result of dumping. Laboratory reflectance spectroscopy was used to characterize the diversity of plastic reflectance and assess spectral signatures to inform multispectral image analysis. Samples processed to date show plastics have consistent absorptions at about 1210 nm\, 1410 nm\, 1660-1730nm\, and 2100-2300nm wavelengths\, depending on the polymer type. When convolved to the spectral response function of the WV3 sensor\, mean plastic reflectance retains prominent features between 1660-1730 nm and above 2200 nm wavelengths\, similar to an image endmember observed through principal components analysis of LLCW imagery. A spectral mixture model uses the matched filtering algorithm and selected image endmember to map built-environment plastic infrastructure and waste hotspots in areas explored during field visits. \n 
URL:https://www.cessrst.org/event/noaa-seminar-series-remote-sensing-of-athropogenic-debris/
CATEGORIES:NOAA Seminar Series,Seminar Series
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DTSTART;TZID=America/New_York:20230822T133000
DTEND;TZID=America/New_York:20230822T140000
DTSTAMP:20260506T015419
CREATED:20230717T183705Z
LAST-MODIFIED:20230817T183727Z
UID:4259-1692711000-1692712800@www.cessrst.org
SUMMARY:NOAA Seminar Series: Arctic Feedbacks on Trace Gas Compositions.
DESCRIPTION:Title: Arctic Feedbacks on Trace Gas Compositions. \nSpeaker: Francia Tenorio\, NOAA EPP/MSI CESSRST-II Fellow at SDSU \nDate: August 22\, 20223 \nTime: 1:30 PM ET \nVenue: Virtual \nMeeting Link :  meet.google.com/ead-ypxo-gvb \nPhone Number\n(‪US‬)‪+1 219-321-0478‬\nPIN: ‪651 945 406#‬ \nLearn more about the speaker \nAbstract: \nPolar ecosystems are warming faster than any other region on Earth (IPCC 2022)\, posing many implications for tundra landscapes. The accelerated warming in the Arctic influences the rate and movement of nutrients in the soil and water\, plant growth\, microbial decomposition\, and thawing of the permafrost processes that occur across the landscape. This can release greenhouse gases (GHG) into the atmosphere. Since permafrost regions hold over half of all the estimated organic carbon stored in Earth’s soils and 40-60 Pg of nitrogen\, it is essential to understand changes across the Arctic landscape and how this influences climate dynamics locally and globally. Thermokarst formations\, which typically occur during the thawing of the permafrost\, may be sources of emissions in tundra landscapes and a reflection of rapid climate change. Microtopographic features\, particularly bare soils\, may be a hotspot for GHGs. The webinar will present a mapping effort of such features via remote sensing techniques in a tundra ecosystem near Utqiaġvik\, Alaska\, emphasizing the monitoring GHGs from such features. \n 
URL:https://www.cessrst.org/event/noaa-seminar-series-artic-feedbacks-on-trace-gas-compositions/
CATEGORIES:NOAA Seminar Series,Seminar Series
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