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Massive coral bleaching episodes have impacted the function of the reefs and increased rates of mortality. Coral reefs support over one million plant and animal species and their economic value is pro¬jected to more than US $ 30 billion annually. Extreme climatic con¬ditions, however, are most likely to increase in the future with cur¬rent climate scenarios. Projected increases in carbon dioxide and temperature exceed the conditions under which coral reefs have flourished over the past 500 000 years. Coral reefs are crucial bio¬diversity hotspots and support both coastal fisheries and tourism in many regions. Coral reefs, however, are in decline in many regions as a result of numerous pressures, including, but not limited to, extreme climate events, unsustainable fishing practices, diseases, sedimentation, and discharge of untreated sewage. Increasing re¬silience and securing rapid recovery of coral reefs will be essen¬tial for the ability of these ecosystems to support coastal fisheries and coastal livelihoods and cultures in the future. However, this resilience and recovery may be seriously impounded by unsustain¬able coastal infrastructure development and marine pollution from land-based sources. At the current rate of growth, coastal develop¬ment may impact up to 90% of the tropical and temperate coast¬lines by 2032 if development continues unchecked. While progress has been made to reduce the discharge and impacts of oil spills and persistent organic pollutants (POP’s), there now needs to be a focus on the largest current threats to the coastal marine environment : untreated sewage and piecemeal coastal development.

Observational records and climate projections provide abundant evidence that freshwater resources are vulnerable and have the potential to be strongly impacted by climate change, with wide-ranging consequences for human societies and ecosystems. Observed warming over several decades has been linked to changes in the large-scale hydrological cycle such as: increasing atmospheric water vapour content; changing precipitation patterns, intensity and extremes; reduced snow cover and widespread melting of ice; and changes in soil moisture and runoff. Precipitation changes show substantial spatial and inter-decadal variability. Over the 20th century, precipitation has mostly increased over land in high northern latitudes, while decreases have dominated from 10°S to 30°N since the 1970s. The frequency of heavy precipitation events (or proportion of total rainfall from heavy falls) has increased over most areas (likely). Globally, the area of land classified as very dry has more than doubled since the 1970s (likely). There have been significant decreases in water storage in mountain glaciers and Northern Hemisphere snow cover. Shifts in the amplitude and timing of runoff in glacier- and snowmelt-fed rivers, and in ice-related phenomena in rivers and lakes, have been observed (high confidence).

"We don’t want to leave this place. We don’t want to leave, it’s our land, our God given land, it is our culture, we can’t leave. People won’t leave until the very last minute.” With these dramatic words, Paani Laupepa, the former assistant secretary at Tuvalu's Ministry of Natural Resources, Energy and Environment, expressed the feelings of many Tuvaluans when it comes to the worst-case scenario of climate change and its effects on small island nations. The scenarios and warnings of international scientist on climate change and its inevitable consequences must be like a constant Damocles Sword for the inhabitants of Tuvalu. For the 21st century, the Intergovernmental Panel on Climate Change (IPCC) states that there will be a warming of global temperatures and a rise of the sea level by up to almost one meter.

It is a great challenge to convert scientific knowledge of climate and sea level change to information that is useful to policy makers. This process is especially important in the South Pacific where many small island nations are already facing the effects of climate change. This paper will address the following topics: the importance and priority of oceanography and science policies: the type of scientific results necessary for the policy process: whether the policy development is externally driven: communication between scientists and policy makers: and the vulnerability of small island states in the face of changing environmental conditions. The South Pacific region's combined Exclusive Economic Zones (EEZ) occupy 30 million square kilometers (three times larger than China or the USA). The land area is less than 2cc of that total with an estimated population of fewer than 6 million people.

A thin veneer of atmosphere, soil, and water covers the surface of the planet. That is the envelope supplying most of the raw material we need to live. Energy from the Sun, with some residual energy still within the planet’s core, feeds Earth’s dynamic systems that cycle materials within the envelope. Earth System scientists are investigating the energy and material fluxes that determine the systems’ dynamics to better understand climate change. This Compendium presents some of the vanguard science and conceptual advances under discussion and published by researchers since 2007 that explores the challenge presented by climate change. Rapidly developing tools—that allow fast and accurate readings of environmental conditions, that compile and analyze data series of increasing complexities at unprecedented rates, and that allow insights into fluxes of energy and material at micro and macro scales—have accelerated the rate at which vanguard science is being produced.

The Pacific islands of Oceania cover almost 15% of the world's surface and are characterised by a high degree of ecosystem and species diversity. The region is characterised by thousands of isolated small coral atolls and higher volcanic islands, which has led to the high diversity of species found today. In fact, the number of plants and animals found nowhere else on earth (endemic species) is extremely high - often up to 90% for particular groups. Often, these rare and endemic species are adapted to specialised habitats and limited to small areas of a few islands. With economic and cultural dependence on the natural environment very high in the Pacific islands, along with a rapidly expanding human population, there are ever increasing demands on the region's natural resources. Plant and animal species are therefore vulnerable to extinction from climate change, competition from introduced (invasive) species and human impacts such as habitat destruction, over-harvesting of species and pollution.

The Pacific islands of Oceania cover almost 15% of the world's surface and are characterised by a high degree of ecosystem and species diversity. The region is characterised by thousands of isolated small coral atolls and higher volcanic islands, which has led to the high diversity of species found today. In fact, the number of plants and animals found nowhere else on earth (endemic species) is extremely high - often up to 90% for particular groups. Often, these rare and endemic species are adapted to specialised habitats and limited to small areas of a few islands. With economic and cultural dependence on the natural environment very high in the Pacific islands, along with a rapidly expanding human population, there are ever increasing demands on the region's natural resources. Plant and animal species are therefore vulnerable to extinction from climate change, competition from introduced (invasive) species and human impacts such as habitat destruction, over-harvesting of species and pollution.

The Pacific islands of Oceania cover almost 15% of the world's surface and are characterised by a high degree of ecosystem and species diversity. The region is characterised by thousands of isolated small coral atolls and higher volcanic islands, which has led to the high diversity of species found today. In fact, the number of plants and animals found nowhere else on earth (endemic species) is extremely high - often up to 90% for particular groups. Often, these rare and endemic species are adapted to specialised habitats and limited to small areas of a few islands. With economic and cultural dependence on the natural environment very high in the Pacific islands, along with a rapidly expanding human population, there are ever increasing demands on the region's natural resources. Plant and animal species are therefore vulnerable to extinction from climate change, competition from introduced (invasive) species and human impacts such as habitat destruction, over-harvesting of species and pollution.

To address the risks women, men, girls and boys face from hazards, climate change and environmental degradation, it is essential to understand a range of variables, such as where people live, their culture, social values and economic position. Different hazards such as earthquakes, tropical cyclones, floods, tsunamis, drought, landslides, erosion and wildfires, present different challenges to governments, organisations and communities. Hazards turn into disasters when people do not have the capacity to prepare for, respond to and recover from them. The number of people living on Pacific Islands affected by weather-related disasters has increased from 1.2 million to 18 million in the past 30 years with droughts, extreme temperature events and tropical cyclones producing the most significant impacts (International Federation of Red Cross IFRC) 2002. There are ways to reduce the threat of disaster, however, including examining gender.

The Pacific islands of Oceania cover almost 15% of the world’s surface and are characterised by a high degree of ecosystem and species diversity. The region is characterised by thousands of isolated small coral atolls and higher volcanic islands, which has led to the high diversity of species found today. In fact, the number of plants and animals found nowhere else on earth (endemic species) is extremely high - often up to 90% for particular groups. Often, these rare and endemic species are adapted to specialised habitats and limited to small areas of a few islands. With economic and cultural dependence on the natural environment very high in the Pacific islands, along with a rapidly expanding human population, there are ever increasing demands on the region’s natural resources. Plant and animal species are therefore vulnerable to extinction from climate change, competition from introduced (invasive) species and human impacts such as habitat destruction, over-harvesting of species and pollution.