🔵 Only 5% of our #oceans have been explored, so clearly there's a lot we don't know about what goes on in the deep
The #SanshaYongle #BlueHole in the #SouthChinaSea was thought for years to be the deepest in our ocean floor
But #scientists have now discovered that the #TaamJa' #BlueHole off the coast of #Mexico and #Belize is actually the deepest - and far deeper than anyone previously thought
But there's more to this one than meets the eye ⤵
https://www.bbc.co.uk/newsround/articles/cxe91dv8kgvo #Environment #News

Taam Ja' Blue Hole: Experts can't find bottom of deepest ocean hole
The Taam Ja' Blue Hole off the coast of Mexico and Belize is the deepest ever recorded, and far deeper than anyone previously thought.
BBC NewsroundKein Grund in Sicht: In Mexiko liegt das tiefste „Blue Hole“ der Welt, wie neue Messungen enthüllen. Das Taam Ja‘ Karstloch reicht 420 Meter hinab - mindestens.
#BlueHole #TaamJa #Karstloch #Geologie https://www.scinexx.de/news/geowissen/tiefstes-blue-hole-der-welt-identifiziert/
Tiefstes Blue Hole der Welt identifiziert
Kein Grund in Sicht: In Mexiko liegt das bisher tiefste bekannte "Blue Hole" der Welt, wie neue Messungen enthüllen. Das Taam Ja' getaufte Karstloch an
scinexx | Das Wissensmagazin"Un agujero azul en el suelo marino de la Bahía de
#Chetumal,
#México, que mide 274 metros de profundidad y 13 mil 690 metros cuadrados de superficie, fue documentado y reportado por científicos de El Colegio de la Frontera Sur (
#ECOSUR)". Congratulations to ECOSUR! Talented Mexican researchers, with the help of local fishermen, found the second deepest known blue hole in the world!
#Bluehole #Mexico #caribbean #agujeroazul #TaamJa’
https://lnkd.in/gq8xw_8khttps://lnkd.in/ge72WJWP
First insights into an exceptionally deep blue hole in the Western Caribbean: The Taam ja’ Blue Hole
Coastal karst formations may remain unexplored by the global marine scientific research community. Knowledge provided by fishermen coupled with scientific research on karstic formations prompted us to explore the geomorphometric and physicochemical features of a submerged blue hole in the large tropical estuary of Chetumal Bay in the southeastern coast of the Yucatán Peninsula, Mexico. Differently from the well-known literature on cenotes in the Yucatán Peninsula, no references are made to blue holes in the region. Sampling and surveying of the blue hole were conducted in September 2021 by scuba, echosounders, CTD profilers, and the collection of water samples. This study revealed a previously unknown maximum water depth for the Taam ja’ Blue Hole, as it is now named, of 274.4 meters below sea level (mbsl), making it the second deepest known blue hole in the world. The Taam ja’ Blue Hole has a nearly circular shape at its surface, encompassing an area of ~13,690 m2. The sides of the blue hole are steep, with slopes >80° that form a large conic structure covered by biofilms, sediments, limestone, and gypsum ledges. The blue hole mouth locates at ~4.5-5.0 mbsl, at which water properties change significantly with temperature and salinity gradients of 4.9°C/m and 9.8 PSU/m, respectively. Hydrographic profiles show a stratified water column inside the blue hole consisting of a hypoxic layer (5-20 mbsl), a chemocline (50-80 mbsl), and an anoxic layer (>110 mbsl). Evaluation of a...
Frontiers