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Document publié le Vendredi 1 janvier 2021 par la commune de Sainte-Anne.
Lien du pdf (unknown - sargassum outlook bulletin vol i issue 8 jfma cermes 15jan2021)
Thèmes du document : Télécommunications et internet, Espaces terrestres et maritimes, Changement climatique,
JAN 2021 | VOL I | ISSUE 8
SARGASSUM INFLUX EVENTS WILL BE
MODERATE TO SEVERE OVER THE NEXT
3+ MONTHS (JAN - APRIL 2021)
Northern islands are set to receive
moderate to severe influxes over the
next 3 months with some reprieve in
early March.
Middle islands will experience
moderate influxes from the end of
January through early March with
periodic influxes thereafter.
In contrast, southern islands are
expected to remain largely clear with
a spike in late March.
CURRENT OUTLOOK (JANUARY-APRIL 2021)
SARGASSUM S U B - R E G I O N A L O U T L O O K B U L L E T I N
Sargassum image sourced from Optical Oceanography Laboratory USF.
Click on picture above to access the source image.
Sargassum abundance intensity level
(based on image 3 - 9 Jan 2021)
The map above is a satellite image processed to show sargassum abundance over a 7-day period. Warm colours represent high sargassum abundance. Sargassum Watch System (SaWS) website: https://optics.marine.usf.edu/projects/saws.html
Sargassum Sub-regional Outlook Bulletin VOL I | ISSUE 8
CLICK HERE TO ENLARGE
The islands of the Eastern Caribbean can
expect moderate to severe sargassum
influxes over the next 3+ months (red),
especially so for the northern islands,
compared with the same period in 2020
(grey).
The Eastern Caribbean islands saw mild
sargassum influxes at the end of 2020.
The level of sargassum arriving now has
increased slightly.
There is 150% more sargassum visible out
in the Atlantic than this time last year.
However, this is still below 2018 levels, the
worst year to date.
(Click here to view photos)
NOTE: New satellite imagery indicates much higher levels of sargassum than was predicted by the previous forecast. Stakeholders in the tourism industry can expect more-or-
less continuous mild to moderate sargassum influxes
over the next few months in the middle and southern
islands, with an ease at the beginning of April. Islands in
the northern part of the island chain will be hard hit in
the first 3 months.
Clean up operations will likely put an extra strain on
resources adding to the current COVID-19 challenges.
The traditional pelagic fishing season got off to an
unexpected slow start given the absence of sargassum.
There were moderate landings of flyingfish and
dolphinfish, with some juveniles being caught.
Consumers can expect an increase in the availability of
almaco jacks (amberfish) in the coming months given the
current sargassum forecast.
Fishers should remain vigilant at sea, particularly in the
north-east where they are likely to encounter large
sargassum mats.
Fisherfolk will likely need to keep clearing their windward
landing sites through much of the first quarter of 2021
CLICK HERE TO ENLARGE
EXPERIMENTAL PRODUCT
LATEST PUBLICATIONS EXPERIMENTAL PREDICTION PRODUCT Click on the titles below to access articles
USEFUL RESOURCES IMPLICATIONS FOR THE TOURISM SECTOR
Acknowledgement: The development of this information product has benefited from the generous support of the Food and Agriculture (FAO) / Global Environment Fund (GEF) project 'Climate Change Adaption in the Eastern Caribbean Fisheries Sector' (CC4FISH), and the Caribbean Biodiversity Fund (CBF) project 'Adapting to a new reality: managing responses to influxes of sargassum seaweed in the Eastern Caribbean (SargAdapt), co-financed by the International Climate Initiative (IKI) of the German Federal Ministry for Environment, Nature Conservation, and Nuclear Safety through KfW. Disclaimer: The information bulletin is meant to provide a general outlook of current sargassum abundance and the likelihood of future sargassum influx events for the Eastern Caribbean. By no means should it be used for commercial purpose, or for predicting the arrival of an influx event for a specific location or beach. We make no warranties, either expressed or implied, concerning the accuracy, completeness, reliability or suitability of said information. The bulletin may be freely used and distributed by the public with appropriate acknowledgement of its source but shall not be modified in content and then presented as original material. We take no responsibility for improper use or interpretation of the bulletin.
IMPLICATIONS FOR THE FISHERIES SECTOR
SUBSCRIBE TO SARGNET
LISTSERV (CLICK HERE)
Click on the images and titles for more information
Massive influx of pelagic Sargassum spp.
on the coasts of the Mexican Caribbean
2014–2020: challenges and opportunities
(Chávez et al. 2020)
The forecast is
remarkably
similar for the
northern islands.
The prediction for
the middle
islands shows
some difference
with only
Sentinel+
predicting a
spike at the end
of January.
The outlook for
the southern
islands differs
quite a bit with
Sentinel+
showing an
earlier arrival of
sargassum each
month.
The prediction graph below illustrates a comparison of 3+ month forecasts using
a relative index of sargassum from processed satellite images by SaWS
(USF/MODIS+) and SAMtool (CLS/Sentinel+). Close overlap of the two lines on any
one graph indicates that the predictions are similar between the two datasets.
In situ observations and modelling
revealed environmental factors favouring
occurrence of Vibrio in microbiome of
the pelagic sargassum responsible for
strandings (Michotey et al. 2020)
Sargassum distribution model based on
the NEMO ocean modelling platform
(Jouanno and Benshila 2020 )
Pelagic Sargassum Prediction and
Marine Connectivity in the Tropical
Atlantic (Johnson et al. 2020)
BGI-SAMS Project Announcement
A NEMO-based model of Sargassum
distribution in the Tropical Atlantic
(Jouanno et al. 2020)
Upcoming Webinar: Sargassum Watch
(NOAA) Data Collecting tools