[✔️] April 6, 2023- Global Warming News Digest | 600 meters a day, Seed vault, Economics, Bitter harvest, Record Antarctic melt. Yale leadership
R.Pauli
Richard at CredoandScreed.com
Thu Apr 6 10:25:08 EDT 2023
/*April*//*6, 2023*/
/[ Ice melt rate on the increase, means sea level rise increasing rate ] /
*Ice sheets can collapse at 600 metres a day, far faster than feared,
study finds*
Sediments from last ice age provide ‘warning from the past’ for
Antarctica and sea level rise today, say scientists
Damian Carrington Environment editor
@dpcarrington
Wed 5 Apr 2023
Ice sheets can collapse into the ocean in spurts of up to 600 metres
(2,000 feet) a day, a study has found, far faster than recorded before.
Scientists said the finding, based on sea floor sediment formations from
the last ice age, was a “warning from the past” for today’s world in
which the climate crisis is eroding ice sheets.
They said the discovery shows that some ice sheets in Antarctica,
including the “Doomsday” Thwaites glacier, could suffer periods of rapid
collapse in the near future, further accelerating the rise of sea level.
The rising oceans are among the greatest long-term impacts of global
heating because hundreds of major cities around the world are on
coastlines and are increasingly vulnerable to storm surges and flooding.
The West Antarctic ice sheet may already have passed the point at which
major losses are unstoppable, which will lead eventually to metres of
sea level rise.
“Our research provides a warning from the past about the speeds that ice
sheets are physically capable of retreating at,” said Dr Christine
Batchelor at Newcastle University in the UK, who led the research. “It
shows that pulses of rapid retreat can be far quicker than anything
we’ve seen so far.”
Most previous estimates of the rate of ice sheet collapse have come from
satellite data, which has been collected for about 50 years. The
geological data used in the study stretches back thousands of years,
allowing a much greater range of conditions to be analysed.
The research, published in the journal Nature, used high-resolution
mapping of the sea bed off Norway, where large ice sheets collapsed into
the sea at the end of the last ice age 20,000 years ago. The scientists
focused on sets of small ridges parallel to the coast, which formed at
the line where the base of the ice sheet met the oceans, called the
grounding line.
As the tides lifted the ice sheets up and down, sediments at the
grounding line were squashed into ridges twice a day. As the base of the
ice sheet melted over days and weeks, the grounding line retreated
towards the shore, leaving behind sets of parallel ridges. Measuring the
distance between the ridges enabled the scientists to calculate the
speed of the Norwegian ice sheet collapse.
They found speeds of between 50 metres a day and 600 metres a day. That
is up to 20 times faster than the speediest retreat recorded previously
by satellites, of 30 metres a day at the Pope Glacier in West
Antarctica. Ridges had been studied before, in Antarctica, but only over
an area of 10 sq km. The new study covered an area of 30,000 sq km, and
7,600 ridges, allowing the scientists to understand what is likely to
control the rates of retreat.
The fastest rates of ice sheet loss to the ocean were found where the
ice sheet had been resting on a virtually flat sea bed. This is because
a relatively small amount of melting at the base of a flat-bedded ice
sheet can lift a large section of the sheet and shift the grounding line
much further inshore than if the sheet was on a steeper slope.
The Norwegian ridges show rapid spurts of ice loss lasting up to 11
days, but Bachelor suspects they could last for months. “The measurement
at Pope Glacier showed 30 metres per day was sustained for about three
and a half months. But 600 metres a day definitely wouldn’t be sustained
for a year or many years – you’d have no ice left.”
However, she said: “Our findings suggest that present-day rates of
melting are sufficient to cause short pulses of rapid retreat across
flat-bedded areas of the Antarctic ice sheet, including at Thwaites.”
Prof Andrew Shepherd, at Northumbria University in the UK, who was not
part of the study team, said: “It’s pretty incredible, but relic
features on the seabed provide much more frequent sampling of ice sheet
retreat than we have been able to achieve with satellites.”
“It turns out that retreat is not a steady process, but happens in short
bursts,” he added. “We didn’t spot that from space because we tend to
track changes once per year at most. Whether the rapid retreat found in
the new study might mean worryingly fast increases in future ice loss
and sea level rise will depend on whether these fast rates are sustained
for periods of time longer than a week or two.”
Dr Johannes Feldmann, at the Potsdam Institute for Climate Impact
Research in Germany, said: “The study [shows] that in the future faster
retreat rates than presently observed in, eg Antarctica, are indeed
possible under specific circumstances. The implications of such rapid
retreat are serious, given the generally irreversible nature of ice
sheet retreat.”
https://www.theguardian.com/environment/2023/apr/05/ice-sheets-collapse-far-faster-than-feared-study-climate-crisis
/[ Plums hurt more than peaches. VOA news video 2:43 duration ]/
*How Climate Change Is Tormenting Fruit Growers*
Warming temperatures from climate change mean spring comes earlier in
higher latitudes. But fruit growers around the temperate world say an
early spring is not always a good thing. The reason is counterintuitive.
But as VOA's Steve Baragona reports, it is another way that climate
change is forcing farmers everywhere to adapt.
https://www.voanews.com/a/how-climate-change-is-tormenting-fruit-growers-/7036115.html
/[ "flotation devices can be found under your seats" video PBS ]/
*Global Seed Vault becomes more important than ever as climate change
threatens crops*
PBS NewsHour
9,314 views Apr 4, 2023
When you think of fresh produce and fields of grain, the Arctic may not
spring to mind. But just 800 miles from the North Pole, the Global Seed
Vault holds emergency stockpiles of most of the world's crops. It
provides scientists with the tools they need to breed plants able to
cope with a changing world. Special correspondent John Bevir visited the
vault to learn more about the future of food.
https://www.youtube.com/watch?v=luqHf5J-XLY
/[ Professor of Economics ]/
*How Economics Overpowers Culture | Lisi Krall*
Planet: Critical
108 views Apr 5, 2023 #politicalcrisis #climatecrisis #economiccrisis
How can we change an economic system that has a life of its own?
10,000 years ago, homo sapiens began farming a grain surplus. This
surplus led to the creation of societal and cultural hierarchies which
divorced our species from our long relationship with the natural world.
This week’s guest, Lisi Krall, argues that our current economic system
of fossil-fuelled capitalism is an interpretation of that same
system—and we must repair our relationship to the more-than-human world
if we are to change the system. But it is a momentous challenge. One,
she argues, we must not think culture alone can overcome.
Lisi Krall is a Professor of Economics at the State University of New
York Cortland where she researches political economy, human ecology, and
the evolution of economic systems. She's also the author of Bitter
Harvest: An Inquiry Into The War Between Economy And Earth. She explains
how systems self-propagate, evolve and dominate culture, arguing acts of
local resistance are key to building a sustainable world, and warns
against projects like the Green New Deal, which she claims is the status
quo masquerading as the solution.
00:00 Intro
03:07 The Economic Superorganism
06:45 How agriculture affected us
08:55 Surplus and Hierarchy
15:13 How the economy self propagates
25:51 Systems change & culture
39:34 Renewable Energy is not the solution
44:22 Reduction & Redistribution
54:30 Creating Ecological Economics
58:40 Conservation
01:05:36 Duality of earth and human world
01:12:20 Who would you like to platform?
🔴 Read 'Bitter Harvest': https://sunypress.edu/Books/B/Bitter-Harvest
https://www.youtube.com/watch?v=0kKGgcxmJ-c
- -
/[ From SUNY Press ]/
*Bitter Harvest**
**An Inquiry into the War between Economy and Earth*
By Lisi Krall
Subjects: Economic History, Environmental Philosophy, Anthropology Of
Work, Sociology Of Work, Cultural Studies
Hardcover : 9781438489919, 196 pages, August 2022
Paperback : 9781438489902, 196 pages, February 2023
Hardcover $95.00
Explores the duality between humans and Earth through a focus on the
economic system changes that began with grain agriculture and has now
reached its apogee in global capitalism.
*Description*
Humans are in danger of crossing a divide where their foothold on an
earth once abundant in self-willed otherness is slipping away. This is
apparent with the sixth mass extinction, climate change, and the many
breaches of planetary boundaries. Bitter Harvest brings clarity to this
moment in history through a focus on economic order, how it comes to be
what it is, and the way it structures the relationship between humans
and Earth. An unusual synergy of disciplines (evolutionary biology,
history, economic systems analysis, anthropology, and deep ecology) are
tapped to fully explore the emergence of an economic system that
contextualized a duality between humans and Earth. Conversations that
focus on capitalism and the industrial revolution are subsumed under the
longer arc of history and the system change that began with the
cultivation of annual grains. Bitter Harvest engenders a more critical
conversation about the complexity of the human relationship to Earth and
the challenge of altering the economic trajectory that began with
agriculture and has now reached its apogee in global capitalism.
Lisi Krall is Professor of Economics at the State University of New York
College at Cortland. She is the author of Proving Up: Domesticating Land
in U.S. History, also published by SUNY Press.
https://sunypress.edu/Books/B/Bitter-Harvest
/[ Beckwith talks rapid change. Rossby waves -- video ]/
*Scientific Mechanisms behind Record Melt of Antarctic Sea Ice in 2023,
2022 and 2017: SST, +SAM…*
Paul Beckwith
Apr 4, 2023
Up until about 2014, the Antarctic Sea Ice was trending upward by about
1.5% per decade. That trend reversed sharply downward, with a record
minimum in 2017, and then there was a massive drop in 2022, and now
another in 2023.
There are many interconnected reasons for this great reduction in
Antarctic Sea Ice and acceleration of the ice loss.
A new peer-reviewed scientific paper from China was just published
online (open source, Google it) that delves into the details.
Basically, the minimum sea ice around Antarctica occurs each year at the
end of the austral (Southern Hemisphere) summer which is in the JFM
(January-February-March) time period (usually mid-February). The
previous JJA there were regions of strong ozone depletion which
increased the Shortwave (SW) Solar Radiation, increasing the Sea Surface
Temperatures (SSTs), decreased the Low level Cloud Cover (LCC) and
increasing the Southern Annular Mode (SAM) westerly winds (winds from
west) circumventing the Antarctica continent. Since the Coriolis force
deflects things moving in the Southern Hemisphere to the left (opposite
to Northern Hemisphere) the surface water and sea ice surrounding
Antarctica is pushed away from the land, thinning the ice and hastening
it’s melting (this motion is called Ekman Flow).
All of these factors basically hammered the Antarctica sea ice in 2022,
as described in the peer-reviewed scientific paper. This year was even
worse, with the Antarctica Sea ice setting a new record low in mid-February.
With less and less Antarctica sea ice, the on land glaciers often speed
up, analogous to taking a cork out of a bottle. Thus, more thinning,
calving, ice shelf collapse, and thus sea level rise occurs. Also, when
sea water freezes into sea ice, brine pockets in the newly formed ice
capture some salt, but the surrounding water is much saltier from ice
rejected salt, so this cold salty water is dense and important for
sinking and driving the Southern Overturning Circulation (SOC) which
connects to the AMOC via the global ocean conveyer. As I showed in a
previous recent video, the SOC is expected to slow by 42% in the next
6-7 years, causing the AMOC to slow by 19% (direct effects; AMOC also
slows because of changes in the Arctic).
https://www.youtube.com/watch?v=PfwmqQ322Ec
/[ From Yale School of the Environment - declaring new climate leaders -
from Program on Climate Communication ]/
*Welcome to the fourth cohort of the Public Voices Fellowship on the
Climate Crisis*
Dear Friends,
The climate crisis affects all of us, but its impacts are unevenly and
unjustly distributed. Those with the greatest power to mitigate and
adapt to climate change often have the least incentive to do so, across
geography, wealth, age, race, and gender.
There is an urgent need for new ideas from a diversity of individuals,
across geography, wealth, age, race, and gender, including those most
impacted by climate change. From them, we can learn new solutions and
envision a more just future.
The YPCCC is delighted to continue its partnership with The OpEd Project
to sponsor the Public Voices Fellowship on the Climate Crisis. This
Fellowship is part of The OpEd Project's national Public Voices
initiative to change who writes history. It is part of YPCCC's work to
diversify and amplify the voices behind climate change action.
Today we are pleased to announce the 20 Fellows of our fourth cohort.
They were chosen from a large and competitive field. The 20 fellows
demonstrate high-powered thought leadership in a variety of ways,
including education, community organizing, public writing, and advocacy.
Some speak for a younger generation, others bring the wisdom of decades
of experience. Some engage faith communities, and others advocate for
vulnerable, or historically underrepresented, communities. Some are
innovating new ways to justly mitigate climate change, others are giving
voice to the histories and stories of the climate movement. They all
seek solutions...
- -
Help spread the word: Congrats to the 2023 #PublicVoices Fellows on the
Climate Crisis — 20 thought leaders working at the intersections of
climate change science, impacts, solutions, and social justice.
@TheOpEdProject @YaleClimateComm
https://climatecommunication.yale.edu/news-events/welcome-to-the-fourth-cohort-of-the-public-voices-fellowship-on-the-climate-crisis/
/[The news archive - looking back at GWBush ] /
/*April 6, 2000*/
April 6, 2000: Predicting the controversies that would define the George
W. Bush administration, New York Times columnist Bob Herbert observes,
"Mr. Bush's relationship to the environment is roughly that of a doctor
to a patient -- when the doctor's name is Kevorkian."
http://www.nytimes.com/2000/04/06/opinion/in-america-bush-goes-green.html?pagewanted=print
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