5 September 2016, DESMOG, Climate Impacts: Melting Glaciers, Shifting Biomes and Dying Trees in US National Parks. Trees are dying across Yosemite and Yellowstone national parks. Glaciers are melting in Glacier Bay National Park and Preserve in Alaska. Corals are bleaching in Virgin Islands National Park. Published field research conducted in U.S. national parks has detected these changes and shown that human climate change – carbon pollution from our power plants, cars and other human activities – is the cause. As principal climate change scientist of the U.S. National Park Service, I conduct research on how climate change has already altered the national parks and could further change them in the future. I also analyze how ecosystems in the national parks can naturally reduce climate change by storing carbon. I then help national park staff to use the scientific results to adjust management actions for potential future conditions. Research in U.S. national parks contributes in important ways to global scientific understanding of climate change. National parks are unique places where it is easier to tell if human climate change is the main cause of changes that we observe in the field, because many parks have been protected from urbanization, timber harvesting, grazing and other non climate factors. The results of this research highlight how urgently we need to reduce carbon pollution to protect the future of the national parks. Melting Glaciers, Dying Trees Human-caused climate change has altered landscapes, water, plants and animals in our national parks. Research in the parks has used two scientific procedures to show that this is occurring: detection and attribution. Detection is the finding of statistically significant changes over time. Attribution is the analysis of the different causes of the changes. Around the world and in U.S. national parks, snow and ice are melting. Glaciers in numerous national parks have contributed to the global database of 168 000 glaciers that the Intergovernmental Panel on Climate Change (IPCC) has used to show that human climate change is melting glaciers. Field measurements and repeat photography show that Muir Glacier in Glacier Bay National Park and Preserve in Alaska lost 640 meters to melting from 1948 to 2000. Read More here
Category Archives: Impacts Observed & Projected
5 September 2016, CSIRO ECOS, Wired woodlands signal stress as climate dries. In 2015, the normal ‘breathing’ pattern of the Great Western Woodlands in south-western Australia became erratic. In response to lack of rain, the old-growth woodland started to ‘breathe in’ oxygen and ‘breathe out’ carbon dioxide – the opposite of what occurs in normal plant photosynthesis, and a sign the trees were ailing. Lift your eyes above the orange- and gold-hued gimlets and salmon gums that characterise these woodlands and you can see the key to understanding this reversal of nature; a 36m tower equipped with highly sensitive instrumentation.It’s the technology in that tower that has been tracking the trees’ struggle for survival; collecting data on the activity of the woodland by the second and updating daily CSIRO researchers based in Perth. The tower, run by CSIRO researchers Dr Suzanne Prober and Dr Craig Macfarlane, is a part of Australia’sTerrestrial Ecosystem Research Network (TERN) OzFlux Facility. A series of 24 OzFlux towers and 10 associated Supersites have been established as sentinels of change across the country. Toward the TERN goal of creating a national ecosystem observatory, each monitors changes in carbon, water and biodiversity in a nationally significant landscape. Read More here
28 August 2016, climate News Network, US faces rising hurricane bill. Scientists forecast that hurricane damage could increase dramatically in the US as high-income countries are also threatened by extreme weather events. German scientists have just issued a financial weather forecast that in a world of unmitigated climate change, the financial losses for the US per hurricane could triple, and annual losses due to hurricanes could rise eightfold. And, they calculate that however vigorous the US economy, its growth cannot outpace the projected rising costs of hurricane damage in the decades ahead. More than half of all weather-related economic losses around the globe are caused by damage due to tropical cyclones, hurricanes or typhoons, and the lessons of new research in Environmental Research Letters journal is that high-income countries may be no better protected than the poorest in this respect. Read More here
24 August 2016,Climate Home, Adaptation takes centre stage as IPCC prepares 1.5C study. Tackling climate change is no longer simply about cutting greenhouse gas emissions: flood defences, heat resilient crops and weather warning systems are set to take centre stage. That’s the message from scientists fresh from an Intergovernmental Panel on Climate Change (IPCC) meeting in Geneva last week. The UN science body has started work on a new and potentially devastating report on ways to avoid warming the earth to more than 1.5C above pre-industrial levels – and the consequences of failure. Due in September 2018, it will set the political tenor for global talks on climate change through to 2020, by which time the new Paris Agreement on climate change is slated to become operational. Critically, it will underpin a UN-led review the same year into how countries are delivering on the Paris deal, and perhaps offer the basis for those national goals to be increased. …… The trouble is it’s effectively too late for that, said Chris Field, co-chair of the IPCC’s last major study and a colleague of Mach’s at the Carnegie Institution and Stanford University. Read More here