SESD Flashcards
how do we track the progression of the Anthropocene
CITE
Atmospheric CO2 concentration - the single indicator
(steffen et al, 2007)
what is
* the pre industrial,
* 1950
* current level
of atmospheric CO2
and cite
270-275 ppm
310 ppm
380 ppm
(Steffen et al, 2007)
what are the 3 phases of the Anthropocene
and cite
- Industrial era (1800-1945)
- Great Acceleration (1945 - ca. 2015)
- Stewards of the Earth System (2015-?)
(Steffen et al, 2007)
3 broad philosophical approaches to deal with changing environment.
and cite
- business as usual
- mitigation
- geo engineering
(Steffen et al, 2007)
What does Stewards of the Earth system mean?
and cite
third stage of the Anthropocene where human activities are recognised as affecting the structure and functioning of the Earth system as a whole
(Steffen et al, 2007)
what has aided the growing awareness of human influence on the Earth system
and cite!
- rapid advances in resource and understanding - most innovative is interdisciplinary work on human environment systems
- enormous power of the internet as a global, self organising info system
- spread of more free and open societies supporting independent media
- growth of democratic systems narrowing scope of arbitrary state power and strengthening role of civil society
(Steffen et al, 2007)
what assumptions do we have in the business as usual approach of the Anthropocene
and cite
- global change will not be severe or rapid enough to cause major disruptions to the global economic system or other important aspects like human health
- the existing market system can deal autonomously with any adaptations required.
- resources required to mitigate global change proactibely would be better spent on more pressing human needs
(Steffen et al, 2007)
example given in of existing economic system dealing with environmental issues
and cite
- as socieites have become wealthier, they have dealt effectively with some local and regional pollution problems.
- clean up of major european rivers
- amelioration of acid rain problem in W. Europe and eastern N. America
(Steffen et al, 2007)
Considerable risk of business as usual approach
and cite
- there is a mismatch in time scales between human decision making/economy and the Earth system
- when humans realise a business as usual approach may not work - the world is already committed to further decades, even centuries, of environmental change
(Steffen et al, 2007)
example of time mis match between Earth system and human decisions/economy
stability of cryosphere
* warming is projected to be twice as large in polar regions enhancing ice sheet instability and glacial melting.
* irreverisdble threshold may in decades be crossed, leading to loss of Grenland ice sheet over centuries or a millenium - thus 5m sea level rise
(Steffen et al, 2007)
outline the mitigation approach
and cite
- attempts to take human pressure off the Earth system by vastly improved technology and management, wise use of resources, control of human and domestic animal population, careful use and restoration of natural environment
- ultimate goal is to reduce human modification of global environment to avoid dangerous levels and rates of change - allow Earth System to function in a pre Anthropocene way
(Steffen et al, 2007)
how is technology used in the mitigation approach
and cite
- rapid advances in transport, energy, agriculture and other sectors have led to a trend of dematerialisation in several advanced econs
- amount and value of econ activity grow while physical material flowing through econ does not
(Steffen et al, 2007)
further technological opportunities - Mitigation approach
and cite
- worldwide energy use is only 0.05% of solar radiation reaching continents
- human appropiation of NPP is around 10%
- new energy generation - solar, thermal, photovoltaic, nuclear, wind, biofules etc
(Steffen et al, 2007)
why might improved tech not be enough in the mitigation approach
and cite
- changes in societal values and individual behaviour will likely be necessary
- Great Acceleration has considerable momentum and intensifying.
(Steffen et al, 2007)
Outline the geo engineering approach
and cite
- severity of climate change may force societies to drastic action
- purposeful manipulation by humans of global scale Earth system processes with the intention of counteracting anthropogenically driven environmental change
(Steffen et al, 2007)
2 Example of geo engineering given in (Steffen et al, 2007)
- artificially enhance Earth;s albedo by releasing sunlight reflective material, like sulphate particles, into stratosphere which would then settle in troposphere
- particles would be produced through oxidation like after volcanic eruptions
- ** geosequestration ** of CO2 into underground reservoirs - would also reduce ocean acidification
What reduction in emissions is needed to stabilise concentration of atmospheric CO2
and cite
60%
(Steffen et al, 2007)
what does IGBP stand for
International Geosphere-Biosphere Programme
What does IPBES stand for
Intergovernmental Science Policy Platform on Biodiversity and Ecosystem Services
how many SDGs are there
17
what report says what about the decline ecosystem services?
and cite
they have continued to decline globally since 1970
IPBES
(United Nations, 2021) report says what about the SDGs
World has deviated off its track to achieve the goals by 2030 due to range of health, economic and social imacts of Covid 19.
How has geography changed during the Anthropocene ?
and cite
Moved from merely a collection and description of knowledge to understanding of coupled patterns and processes and the simulation and prediction of complex human and earth systems that now provides support for decision making.
(Fu et al, 2021)
LSS framework and cite
Landscape Sustainability Science
- guides on how to improve capacity of a landscape and provide landscape specific ecosystem services crucial for SD.
(Wu, 2013)