'Ask an Ocean Explorer'
As a count-down to the publication of my book 'Ask an Ocean Explorer', here's a flavour of its mix of the history of ocean exploration, inhabitants of the abyss, undersea technology, and how our lives are connected to the hidden face of our planet:
My book "Ask An Ocean Explorer"(*) is out in 30 days (on 21 Feb).
So for the next 30 days, I'll be sharing some of the wonders & history of exploring the deep here, in #30daysofdeep
(*<cough>available for pre-order, e.g. https://t.co/wk9GbVxJty; also for Kindle, & audio book)
— Jon Copley (@expeditionlog) January 23, 2019
On this day, 59 years ago, two people reached the ocean's deepest point for the first time.
Here's a wonderful account by one of them, Don Walsh, in his own words: https://t.co/nF7jI5iWC0
And here's some archive newsreel footage: https://t.co/tcqPHcVVUH#30daysofdeep 1/30
— Jon Copley (@expeditionlog) January 23, 2019
#30daysofdeep 2/30
Here's Gorringe Bank, a twin-peaked seamount near Portugal that rises from ~5 km deep to ~50 m deep, taller than Mont Blanc in the Alps. Home to >800 species, from deep-sea glass sponges to kelp.
Discovered by USS Gettysburg in 1875 under Capt Henry Gorringe. pic.twitter.com/FmrQFOYfj7
— Jon Copley (@expeditionlog) January 24, 2019
#30daysofdeep 3/30
Meet Rimicaris hybisae: shrimp that thrive at undersea hot springs 5 km (3.1 miles) deep in the Cayman Trough.
The species was discovered during a @NERCscience expedition in 2010, & described by Dr Verity Nye during her PhD research: https://t.co/y0GGryTGYR pic.twitter.com/8pfiRXHBSY
— Jon Copley (@expeditionlog) January 25, 2019
#30daysofdeep 4/30
What eats those shrimp? Here's Pachycara caribbaeum, an eelpout fish (https://t.co/v5vFG1s1qP); a microCT scan shows the shrimp in its gut.
While adults bask at balmy deep-sea vents, juveniles live where bizarre blocks of methane ice poke out of the seabed. pic.twitter.com/3va30B1uKu
— Jon Copley (@expeditionlog) January 26, 2019
#30daysofdeep 5/30
Some record-setting dives:
🌊surface
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923m Beebe & Barton 1934
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1372m Barton 1949
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3167m Piccard & Piccard 1953
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4050m Houot & Willm 1954
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10916m Piccard & Walsh 1960
— Jon Copley (@expeditionlog) January 27, 2019
#30daysofdeep 6/30
On this day 10 years ago, we got our first glimpse of "Hoff" crabs at deep-sea vents in the Southern Ocean, towing a camera 2.4 km deep from RRS James Clark Ross.
It turned out they had been photographed before, but ignored, in 1966 - https://t.co/JZDrVZLros pic.twitter.com/El35qXp6Xz
— Jon Copley (@expeditionlog) January 28, 2019
#30daysofdeep 7/30
In 1858, the first seafloor telegraph cable across the Atlantic could carry ~10-12 words per minute.
160 years later, the latest fibreoptic cable across the Atlantic ocean floor can live-stream 71 million HD movies simultaneously:https://t.co/15D7nkT2sx pic.twitter.com/YJJ2GRXyBh
— Jon Copley (@expeditionlog) January 29, 2019
#30daysofdeep 8/30
Remember the leaping mobula rays of #BluePlanet2 & other TV documentaries (e.g. https://t.co/6tXwgcnWxP)?
Here's a mention of the behaviour in C. S. Forester's "Hornblower" novel "The Happy Return" (aka "Beat To Quarters" in the US), published in 1937: pic.twitter.com/hirsZWTToX
— Jon Copley (@expeditionlog) January 30, 2019
#30daysofdeep 9/30
Seawater blocks the radar signals satellites use to make detailed maps of the surfaces of other planets.
For detailed ocean floor maps, we have to use sonar from ships & underwater vehicles.
Here's how our ocean floor maps compare with maps of other planets: pic.twitter.com/2zJvYyjEcO
— Jon Copley (@expeditionlog) January 31, 2019
#30daysofdeep 10/30
Autonomous Underwater Vehicles (AUVs) help with the initial "make a map" step of ocean exploration, enabling better use of human-directed vehicles for the "investigate the anomalies" step
Here's Autosub6000 being launched & recovered: https://t.co/Nr8hgDXiuE
— Jon Copley (@expeditionlog) February 1, 2019
#30daysofdeep 11/30
Deepest breath-hold dive no fins or weights: 102 m (Trubridge, 2016)
Deepest breath-hold dive: 253 m (Nitsch, 2012)
Deepest scuba dive: 332 m (Gabr, 2014)
Deepest ambient-pressure dive in the ocean: 534 m (COMEX Hydra 8 team, 1988)https://t.co/XQm5bht5cN
— Jon Copley (@expeditionlog) February 2, 2019
#30daysofdeep 12/30
Finding a mate in the dark & often sparsely populated depths can be a challenge.
The tracks of Paroriza pallens sea cucumbers reveal their not-so-brief-encounters on the ocean floor, when two meet & then travel on together side-by-side (pic: @oceanexplorer). pic.twitter.com/5ywVS6ltJu
— Jon Copley (@expeditionlog) February 3, 2019
#30daysofdeep 13/20
1st female bathynaut: Gloria Hollister (1934)https://t.co/o6ThMLcI6j
1st female bathynaut in DSV Alvin: Dr Ruth Turner (1971)
1st female pilot-in-command of DSV Alvin: Prof Cindy Van Dover (1990)#WomenInSTEM
— Jon Copley (@expeditionlog) February 4, 2019
#30daysofdeep 14/30
165 years after the Mid-Atlantic Ridge was 1st glimpsed on Maury's seafloor map of 1854: UK, Brazil, Portugal claim areas as territory around their islands, & Russia, France, Poland have mining exploration licences there.
(Map from https://t.co/Ppy7Q9X7sU) pic.twitter.com/QHPQZAe91W
— Jon Copley (@expeditionlog) February 5, 2019
#30daysofdeep 15/30
Are "sea monsters" real? Here's a round-up of ocean giants, from oarfish to Giant Squid, by @DrCraigMc & colleagues: https://t.co/3Ht4K96GbB
And here's a classic paper estimating no. of undiscovered large species, by @CharlesPaxton4: https://t.co/AEDOw8Q7m3
— Jon Copley (@expeditionlog) February 6, 2019
#30daysofdeep 16/30
Some deep-sea animals do resemble sci-fi aliens (or perhaps it's the other way round); here's Phronima, an amphipod crustacean that makes its home inside a salp: https://t.co/jfVarRKAlY
(& for a few more sci-fi/deep-sea matches, see https://t.co/YEzfWNCnWC) pic.twitter.com/ub6Z7LXgtE
— Jon Copley (@expeditionlog) February 7, 2019
#30daysofdeep 17/30
"Zombie" worms burrow into the skeletons of dead animals on the seafloor, digesting their bones with acid (https://t.co/CTJAHOnmZW) to make a living from them.
Here are some on a whale skeleton we found 1.4 km deep in the Antarctic (https://t.co/RJG9wNXtIJ): pic.twitter.com/GRsqQk6KUf
— Jon Copley (@expeditionlog) February 8, 2019
#30daysofdeep 18/30
Our waste unfortunately ends up in the deep ocean too; here's some rubbish we found 2.3 km deep.
The CO2 molecules that we pour into the atmosphere affect the ocean depths as well, e.g. changing how some minerals dissolve in the deep: https://t.co/iJVA11S34t pic.twitter.com/bx5DwsCfS7
— Jon Copley (@expeditionlog) February 9, 2019
#30daysofdeep 19/30
Marine biologists have watched the same female deep-sea octopus (Graneledone boreopacifica) keep vigil over her developing eggs at 1.4 km deep for 4.5 years - the longest egg-brooding period of any animal: https://t.co/ztoupgL7t7
(& https://t.co/SQNfcJTHLc)
— Jon Copley (@expeditionlog) February 10, 2019
#30daysofdeep 20/30
For #WomenInScienceDay, meet Marie Tharp, who discovered the vast undersea volcanic rift that forms the geological backbone of our planet - a discovery as profound for Earth sciences as the structure of DNA in biology:https://t.co/qCfN7ZUFK2
— Jon Copley (@expeditionlog) February 11, 2019
#30daysofdeep 21/30
Hydrothermal vents & cold seeps are "island-like" habitats on the ocean floor, so for #DarwinDay, here's how species of "yeti" crabs have evolved among vents & seeps - a modern take on Darwin's finches, revealed by @Elpipster:https://t.co/SiXC2FGYrc pic.twitter.com/xba5bimCGs
— Jon Copley (@expeditionlog) February 12, 2019
#30daysofdeep 22/30
On 22 Sept 1932, William Beebe & Otis Barton broadcast live on NBC & BBC radio from their bathysphere at a then-record depth of 671 metres - #WorldRadioDay
Sadly the 1st broadcast from the deep was not recorded (but was transcribed): https://t.co/nd7ULrZoVK
— Jon Copley (@expeditionlog) February 13, 2019
#30daysofdeep 23/30#ValentinesDay
Roses are red
But because most bioluminesence in the deep ocean is blue-green
They appear black to most deep-sea animals pic.twitter.com/ZLCRRZ3ptq
— Jon Copley (@expeditionlog) February 14, 2019
#30daysofdeep 24/30
While astronauts were heading to the Moon aboard Apollo 11 in July 1969, six bathynauts spent 30 days aboard the "mesoscaphe" Ben Franklin, diving down to >500 m deep while drifting >2000 km in the Gulf Stream:https://t.co/Opuue1A1BH
— Jon Copley (@expeditionlog) February 15, 2019
#30daysofdeep 25/30
Today is #WorldWhaleDay & here's evidence that some might dive deeper in ocean than we imagined -- maybe beyond 4 km deep -- pieced together in a recent paper by @Leigh_Marsh @VeerleHuvenne @DanielOBJones:https://t.co/CQCIEnzNwN
(https://t.co/Cze1PnN7Np)
— Jon Copley (@expeditionlog) February 16, 2019
#30daysofdeep 26/30
Although Piccard & Walsh reported seeing a flatfish at the ocean's deepest point, the deepest confirmed observation is a snailfish, filmed 8178 m deep:https://t.co/L3KFCNkl09
Biochemistry may prevent fish going much deeper than that:https://t.co/JLSWGKcZ9b
— Jon Copley (@expeditionlog) February 17, 2019
#30daysofdeep 27/30
Most deep-sea animals don't "explode" if brought to the surface; their bodies are solid tissues & liquid (no gas inside them), which doesn't expand with lower pressure.
(Take a syringe of water & seal the hole with your thumb; you can't pull the plunger out) pic.twitter.com/sWLjTutj9S
— Jon Copley (@expeditionlog) February 18, 2019
#30daysofdeep 28/30
A network of >4000 robotic drifters now gives us a large-scale, real-time map of conditions in the oceans & how they are changing...
...including measurements of how the oceans absorb heat trapped in the atmosphere by CO2 emissions:https://t.co/8n9I42rJhq
— Jon Copley (@expeditionlog) February 19, 2019
#30daysofdeep 29/30
Before oceanographers could map ocean features far from land, cartographers embellished ocean spaces of maps with sea monsters, often based on tales of mariners.
Olaus Magnus's "Carta Marina" of 1539 has some lovely examples:https://t.co/JQilTZyuyu pic.twitter.com/awD0eJvlKF
— Jon Copley (@expeditionlog) February 20, 2019
#30daysofdeep 30/30
Today's the day: "Ask an Ocean Explorer" is out!
Hopefully this thread has given a flavour of its pottage of the history of ocean exploration, inhabitants of the abyss, undersea technology, and how our lives are connected to the hidden face of our planet. pic.twitter.com/1KS3dP3KIP
— Jon Copley (@expeditionlog) February 21, 2019
I'm hugely grateful to the skill & patience of my editor @Gowlettronic, and all of the team at @HodderNonFic, for bringing the book into existence :)
Looking forward to talking about exploring the oceans at upcoming literary festivals, thanks to @BeccaCMundy & the publicity team
— Jon Copley (@expeditionlog) February 21, 2019
Jon Copley, February 2019
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