To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Nuclear-armed countries are a threat to people everywhere partly because of the destructive power of single weapons – one weapon is enough to destroy a small city – and partly because of the growing ability of nations to launch missiles across the globe. There are now about fifteen thousand nuclear weapons, mainly in Russia and theUnited States but also about one thousand in Britain, China, France, India, Israel, North Korea and Pakistan. Nuclear war is an assault on the global climate system caused by smoke from fires ignited by the bombs used against urban centers. As the smoke rapidly spreads globally in the stratosphere it will absorb sunlight, preventing it from reaching the surface, which will reduce surface temperatures and rainfall. The sunlight absorbed by the smoke will also heat the stratosphere, destroying the global ozone layer that shields us from harmful ultraviolet radiation from the Sun. The deaths from these environmental changes would likely be a factor of 10 or more larger than the direct casualties from the explosions – potentially threatening the bulk of the human population – and would not be limited to the combatants.
Over-population and climate change, principally attributable to ecosystem loss and degradation together with the exploitation of non-renewable fossil fuels for energy, compromise our food and potable water systems. If these problems are reversed, as they might by 2050, humans may survive on a planet that may undergo limited, but sustainable recovery. In the meantime, our food patterns need to change to ones more biodiverse and plant-based and to be less fossil fuel dependent and not wasteful. This should ameliorate the changes in health patterns, especially as we have come to understand that we ourselves are ecological creatures, intimately connected to our environment. Therefore, we suffer environmental health disorders (EHDs) when our environment fails. Nutrition science has environmental, societal, economic as well biomedical dimensions. We have surveillance and monitoring ecosystem assessment and management tools with which to act and multiple systems to engage, including those of food, health and sustainable development. Economically, we need to shift from indices of growth to those of livelihood and provide a currency for it.
Natural factors (solar and volcanic activities, orbital changes, etc.) changed the Earth’s climate in the past. Climate change nowadays differs. Human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history. Current continued emission rate of greenhouse gases will cause further warming and long-lasting changes in all components of the climate system, increasing the likelihood of severe, pervasive and irreversible detrimental impacts for people and ecosystems. Warmer temperature, reduced surface and groundwater resources, increased extreme events, sea level rise, ocean acidification, extinction of species, melting glaciers, reduced permafrost extent, loss of Amazon rain forest, widespread drought and undermined food security, increased poverty and hunger, increased displacement of people, exacerbated human health problems and national security implications are some of the expected mega changes in the Future Earth. While stressing these threats, we are actually expressing a longing for a better world for our future and our children.
A decadal coupled ocean–atmosphere interaction mode may explain thefifty- to seventy-year quasi-periodic multidecadal variability over the North Atlantic region, and this may have impacts on the global and regional climates, possibly explaining the global warming hiatus, providing a useful predictor for decadal variation of the temperature. The decadal coupled mode also exerts an influence on the Southern Hemisphere climate, especially the decadal variation of Australian rainfall.
The value of satellite remotely sensed data is especially relevant in the context of global hydrological modelling, which provides important information on the status and spatio-temporal changes of water resources worldwide.
Satellites can be used to monitor the water cycle under human impact, to calculate the fluxes of water through rainfall, surface and groundwater runoff, evaporation, transpiration and condensation. Using the water balance equation as a basis, we discuss in detail the Gravity Recovery and Climate Experiment (GRACE) mission and a small sample of other contributing missions, such as the Surface Water Ocean Topography (SWOT), Soil Moisture and Ocean Salinity (SMOS), Soil Moisture Active Passive (SMAP), Tropical Rainfall Measuring (TRMM), Global Precipitation Measurement (GPM), Clouds and the Earth’s Radiant Energy System (CERES) and Moderate Resolution Imaging Spectroradiometer (MODIS). We conclude the chapter with perspectives and requirements for the future, and we stress the need for continuous, long-term monitoring of the global water cycle from space.
To obtain ocean information in an international, more efficient, more integrated, and fit-for-purpose way requires co-design, co-production and co-dissemination of knowledge. The UN’s 2030 Agenda for sustainable development has for the first time explicitly articulated a focussed ocean goal. Science needs to define smart targets for “ocean health” as a goal for ocean sustainability. Future Earth together with its science partner organisations is well positioned to facilitate the formation of trans-disciplinary teams that can address these challenges through an integrative Knowledge–Action Network (KAN). Future Earth Knowledge–Action Networks are collaborative frameworks stimulating highly integrative sustainability research. Their aim is to generate the multifaceted knowledge needed to inform solutions for complex societal issues. Future Earth and its ocean partners are in the process of establishing an Ocean Knowledge–Action Network (Ocean KAN) responding to demands that have been elaborated and articulated by the science community.
Riverine Arctic communities face flood risk every spring. As the river ice begins to thaw and break up, ice jams force melt water and ice floes to back up for dozens of kilometers and flood vulnerable communities upstream. A comparative analysis between two flood-prone communities in Alaska and Sakha Republic (Siberia) revealed that springtime flood risk in both regions results from complex interactions among a series of natural processes that generate conditions of hazard, and human actions that generate conditions of communities’ vulnerability. The analysis revealed that seasonal weather patterns and regional river channel morphology determine the location, severity, and duration of floods, while limited inclusion of local communities in the decision making has been the driving force of vulnerability in both regions. The analysis also revealed the importance of continuous communication among all stakeholders in timely and effective flood risk management in both regions
To make science, and scientific research, relevant to society the issues to be examined need to correspond to those considered noteworthy by the international community. In 2015 three important international agreements were negotiated: The Paris Agreement on Climate Change, the Sendai Framework for Disaster Risk Reduction, and the Sustainable Development Goals. These agreements set the agenda for studies related to global change and Future Earth.
Sustainable Asian groundwater perspectives are discussed in this chapter by examining groundwater hydrology in conjunction with oceanographic, geothermal and geodesic aspects. Subsurface environmental changes in Asia due to urbanization and global change include groundwater storage changes as detected by the geodesy satellite GRACE and others. Subsurface warming due to global warming and urbanization is another issue in Asia that is related to geothermal energy sources. Land–ocean interaction and groundwater contaminant loads from land to the ocean in Asia are related to oceanography. The groundwater footprint and integrated water management for sustainability are discussed as a means of transformation to sustainable water use in Asia for the future of the Earth.
Geodetic science uses observations of the Earth’s changing shape, rotation, and gravity field to inform us about the changing climate. Geodetic observations provide information on regional as well as global changes in the water cycle, the thickness and extent of ice cover, sea level, and other changes in ocean dynamics. In this chapter, we review how each of the three pillars of geodesy has provided evidence for and insight into the effects of climate warming over the last two decades
Urbanization has caused irreversible changes. Apart from fostering development, urban areas have modified their surroundings. Annual and seasonal pollution averages from 2006 to 2010 reveal that there are apparent increases in pollution levels, especially for NO2, SPM and RSPM. However, these pollution levels are not constant; rather, they fluctuate with the seasonal changes.
These changes impact human health. The link between health and environment is complex. The impact of air pollution on human health has been analyzed by correlating air pollution levels and number of deaths caused by it.
Results reveal that asthma, bronchitis and pneumonia are responsible for most deaths due to air pollution in Delhi. Spatial and temporal analysis of mortality from these diseases presented for Delhi (2001–2012) reveals that there has been an increase in the number of deaths of children due to respiratory illness. The other major age group facing the impact of rising pollution levels is the age group greater than 60 years old.
Climate change threatens agricultural food production as the latter depends on weather conditions, water supply and sunlight intensity. The steady increase of average temperatures during the growing season and drought occurrence, on the one hand, and of extreme weather events such as floods, hail and late frosts, on the other, is projected to result in losses of agricultural output. Technological progress, the introduction of more resistant crop varieties together with the “fertilizing” effect of higher atmospheric CO2 levels may compensate for some of the losses. Exposure to heat and drought also influences the composition of many important food and feed crops such as cereals and oil seeds, changing their content of essential nutrients and often lowering their nutritional value. Moreover, climate change threatens not only the production of food but also its storage and transport. Altered climate will shift the distribution of pests, fungi and microorganisms and may lead to higher food prices.