![]() This not only lets the ice sheet flow toward the warming ocean more quickly, it allows the exposed edges of the ice sheet to break off or "calve" into the ocean, adding to sea level rises. Meltwater on their surfaces can deepen crevasses and cause them to disintegrate entirely. Those buttressing ice shelves act both as dams that keep the sheet from sliding rapidly into the ocean, and as supports that keep the edges of the ice sheet from collapsing.īut as warming increases, the ice shelves thin and become more fragile. What keeps that ocean-bound ice flowing slowly is a ring of buttressing ice shelves, which float in the ocean but hold back the upstream glacial ice by scraping on shallow sea-floor features. Ice flows slowly downhill, and the Antarctic Ice Sheet naturally creeps into the ocean, where it begins to melt. ![]() Antarctica contributes about 1 meter (39.4 inches) of sea level rise by 2300 if warming is limited to 2 degrees or less, but reaches globally catastrophic levels of 10 meters (32.8 feet) or more under a more extreme warming scenario with no mitigation of greenhouse-gas emissions.ĭeConto and colleagues' research shows the very architecture of the Antarctic Ice Sheet itself plays a key role in ice loss. ![]() The implications of exceeding Paris Agreement warming targets become even more stark on longer timescales. Unless ambitious action to rein in warming begins by 2060, no human intervention, including geoengineering, would be able to stop 17 to 21 centimeters (6.7 to 8.3 inches) of sea-level rise from Antarctic ice melt alone by 2100, according to the researchers. But if the current course toward 3 degrees is maintained, the model points to a major jump in melting. If the world either achieves the more optimistic 1.5-degree or the 2-degree Paris Agreement temperature target, the Antarctic Ice Sheet would contribute between 6 and 11 centimeters (2.4 and 4.3 inches) of sea level rise by 2100. Alley, Evan Pugh University Professor of Geosciences, both at Penn State, modeled the impact of several different warming scenarios on the Antarctic Ice Sheet, including the Paris Agreement target of two degrees Celsius (3.6 degrees Fahrenheit) of warming, an aspirational 1.5 (2.7) degree scenario, and our current course which, if not altered, will yield 3 or more degrees of warming. The research team, led by the University of Massachusetts Amherst's Rob DeConto, co-director of the School of Earth & Sustainability, and including David Pollard, research professor emeritus, Earth and Environmental Systems Institute, and Richard B. If the rate of global warming continues on its current trajectory, we will reach a tipping point by 2060, past which these consequences would be "irreversible on multi-century timescales," according to researchers. The world is currently on track to exceed 3 degrees Celsius (5.4 degrees Fahrenheit) of global warming by the year 2100, and new research shows that such a scenario would drastically accelerate the pace of sea-level rise. Use the form’s “question or comment” field to specify the requested publication.AMHERST, Mass. Request alternate formats To request an alternate format of a publication, complete the Government of Canada Publications email form. Issued also in French under title: Nous nous levons ensemble : atteindre l’objectif 1 du Canada en créant des aires protégées et de conservation autochtones dans l’esprit et la pratique de la réconciliation : le Cercle autochtone d’experts rapport et recommendations. We rise together : achieving pathway to Canada target 1 through the creation of Indigenous protected and conserved areas in the spirit and practice of reconciliation : the Indigenous Circle of Experts’ report and recommendations.Īchieving pathway to Canada target 1 through the creation of Indigenous protected and conserved areas in the spirit and practice of reconciliation : the Indigenous Circle of Experts’ report and recommendations ![]() Publication information Department/Agency Permanent link to this Catalogue record: publications.gc.ca/pub?id=9.852966&sl=0 We hope that through our articulation of IPCAs, we can contribute to a more hopeful vision of the future-a future where Indigenous Peoples decide what conservation and protection means to them and to the lands and waters and are given the space to lead its implementation in their territories"-Forward, p. To achieve this, we have endeavoured to illustrate an important aspect of such appropriate recognition: Indigenous Protected and Conserved Areas (IPCAs). "This report posits that the time has come for Indigenous knowledge systems, legal traditions, and customary and cultural practices to be appropriately recognized as equally valid and binding versus other frameworks. We rise together : achieving pathway to Canada target 1 through the creation of Indigenous protected and conserved areas in the spirit and practice of reconciliation : the Indigenous Circle of Experts’.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |