Global warming and human land management have greatly influenced vegetation growth through both changes in spring phenology and photosynthetic primary production. This will presumably impact the velocity of vegetation greenup (Vgreenup, the daily rate of changes in vegetation productivity during greenup period), yet little is currently known about the spatio-temporal patterns of Vgreenup of global vegetation. Here, we define Vgreenup as the ratio of the amplitude of greenup (Agreenup) to the duration of greenup (Dgreenup) and derive global Vgreenup from 34-year satellite leaf area index (LAI) observations to study spatio-temporal dynamics of Vgreenup at the global, hemispheric, and ecosystem scales. We find that 19.9% of the pixels analyzed (n = 1,175,453) experienced significant trends toward higher greenup rates by an average of 0.018 m2 m-2 day-1 for 1982-2015 as compared to 8.6% of pixels with significant negative trends (p
A consistent methodology for assessing the accumulating effects of natural and manmade change on riverine systems has not been developed for a whole host of reasons including a lack of data, disagreement over core elements to consider, and complexity. Accumulated state assessments of aquatic systems is an integral component of watershed cumulative effects assessment. The Yukon River is the largest free flowing river in the world and is the fourth largest drainage basin in North America, draining 855,000 km(2) in Canada and the United States. Because of its remote location, it is considered pristine but little is known about its cumulative state. This review identified 7 "hot spot" areas in the Yukon River Basin including Lake Laberge, Yukon River at Dawson City, the Charley and Yukon River confluence, Porcupine and Yukon River confluence, Yukon River at the Dalton Highway Bridge, Tolovana River near Tolovana, and Tanana River at Fairbanks. Climate change, natural stressors, and anthropogenic stresses have resulted in accumulating changes including measurable levels of contaminants in surface waters and fish tissues, fish and human disease, changes in surface hydrology, as well as shifts in biogeochemical loads. This article is the first integrated accumulated state assessment for the Yukon River basin based on a literature review. It is the first part of a 2-part series. The second article (Dubé et al. 2013a, this issue) is a quantitative accumulated state assessment of the Yukon River Basin where hot spots and hot moments are assessed outside of a "normal" range of variability.
The AMAP Human Health Assessment Group has developed different adaptation strategies through a long-term collaboration with all Arctic countries. Different adaptation strategies are discussed, with examples mainly from native population groups in Alaska.
Cites: Sci Total Environ. 2005 Dec 1;351-352:57-93 PMID 16154621
Climate change is among the major challenges for health this century, and adaptation to manage adverse health outcomes will be unavoidable. The risks in Ontario - Canada's most populous province - include increasing temperatures, more frequent and intense extreme weather events, and alterations to precipitation regimes. Socio-economic-demographic patterns could magnify the implications climate change has for Ontario, including the presence of rapidly growing vulnerable populations, exacerbation of warming trends by heat-islands in large urban areas, and connectedness to global transportation networks. This study examines climate change adaptation in the public health sector in Ontario using information from interviews with government officials.
Fifty-three semi-structured interviews were conducted, four with provincial and federal health officials and 49 with actors in public health and health relevant sectors at the municipal level. We identify adaptation efforts, barriers and opportunities for current and future intervention.
Results indicate recognition that climate change will affect the health of Ontarians. Health officials are concerned about how a changing climate could exacerbate existing health issues or create new health burdens, specifically extreme heat (71%), severe weather (68%) and poor air-quality (57%). Adaptation is currently taking the form of mainstreaming climate change into existing public health programs. While adaptive progress has relied on local leadership, federal support, political will, and inter-agency efforts, a lack of resources constrains the sustainability of long-term adaptation programs and the acquisition of data necessary to support effective policies.
This study provides a snapshot of climate change adaptation and needs in the public health sector in Ontario. Public health departments will need to capitalize on opportunities to integrate climate change into policies and programs, while higher levels of government must improve efforts to support local adaptation and provide the capacity through which local adaptation can succeed.
James D. Ford is with the Department of Geography, McGill University, Montreal, Quebec. Ashlee Cunsolo Willox is with the Department of Community Health, Cape Breton University, Sydney, Nova Scotia. Susan Chatwood is with the Institute for Circumpolar Health Research, Yellowknife, Northwest Territories. Christopher Furgal is with the Department of Indigenous Environmental Studies, Trent University, Peterborough, Ontario. Sherilee Harper is with the Department of Population Medicine, University of Guelph, Ontario. Ian Mauro is with the Department of Geography, University of Winnipeg, Manitoba. Tristan Pearce is with the University of the Sunshine Coast, Maroochydor, Queensland, Australia.
Climate change will have far-reaching implications for Inuit health. Focusing on adaptation offers a proactive approach for managing climate-related health risks-one that views Inuit populations as active agents in planning and responding at household, community, and regional levels. Adaptation can direct attention to the root causes of climate vulnerability and emphasize the importance of traditional knowledge regarding environmental change and adaptive strategies. An evidence base on adaptation options and processes for Inuit regions is currently lacking, however, thus constraining climate policy development. In this article, we tackled this deficit, drawing upon our understanding of the determinants of health vulnerability to climate change in Canada to propose key considerations for adaptation decision-making in an Inuit context.
Cites: Med J Aust. 2009 Jan 5;190(1):4-519119999
Cites: Med Anthropol Q. 2013 Mar;27(1):63-8323674323
Cites: Br J Nutr. 2010 Mar;103(5):749-5919840421
Cites: CMAJ. 2010 Feb 23;182(3):243-820100848
Cites: Can J Public Health. 2010 Jan-Feb;101(1):25-720364533
Cites: BMC Med Educ. 2010;10:3120429949
Cites: Philos Trans A Math Phys Eng Sci. 2011 Jan 13;369(1934):196-21621115520
Cites: CMAJ. 2011 Feb 8;183(2):209-1421041430
Cites: Philos Trans A Math Phys Eng Sci. 2011 May 13;369(1942):1866-8221464077
Cites: Am J Public Health. 2011 May;101(5):804-1321421953
Cites: Am J Public Health. 2011 May;101(5):814-2121490335
Cites: Health Aff (Millwood). 2011 May;30(5):924-3021555476
Cites: Am J Community Psychol. 2011 Dec;48(3-4):426-3821387118
Cites: BMJ. 2003 Aug 23;327(7412):419-2212933728
Cites: Int J Circumpolar Health. 2005 Dec;64(5):478-8616440610
Cites: Int J Circumpolar Health. 2005 Dec;64(5):487-9716440611
Cites: CMAJ. 2006 Sep 12;175(6):60216966664
Cites: Environ Health Perspect. 2006 Dec;114(12):1930-417185287
Cites: Environ Health Perspect. 2006 Dec;114(12):1964-7017185292
Cites: Int J Circumpolar Health. 2006 Dec;65(5):416-3117319086
How temperate forests will respond to climate change is uncertain; projections range from severe decline to increased growth. We conducted field tests of sessile oak (Quercus petraea), a widespread keystone European forest tree species, including more than 150 000 trees sourced from 116 geographically diverse populations. The tests were planted on 23 field sites in six European countries, in order to expose them to a wide range of climates, including sites reflecting future warmer and drier climates. By assessing tree height and survival, our objectives were twofold: (i) to identify the source of differential population responses to climate (genetic differentiation due to past divergent climatic selection vs. plastic responses to ongoing climate change) and (ii) to explore which climatic variables (temperature or precipitation) trigger the population responses. Tree growth and survival were modeled for contemporary climate and then projected using data from four regional climate models for years 2071-2100, using two greenhouse gas concentration trajectory scenarios each. Overall, results indicated a moderate response of tree height and survival to climate variation, with changes in dryness (either annual or during the growing season) explaining the major part of the response. While, on average, populations exhibited local adaptation, there was significant clinal population differentiation for height growth with winter temperature at the site of origin. The most moderate climate model (HIRHAM5-EC; rcp4.5) predicted minor decreases in height and survival, while the most extreme model (CCLM4-GEM2-ES; rcp8.5) predicted large decreases in survival and growth for southern and southeastern edge populations (Hungary and Turkey). Other nonmarginal populations with continental climates were predicted to be severely and negatively affected (Bercé, France), while populations at the contemporary northern limit (colder and humid maritime regions; Denmark and Norway) will probably not show large changes in growth and survival in response to climate change.
Cites: Nature. 2009 Dec 24;462(7276):1052-520033047
The ecology of the willow warbler in the north of Western Siberia is considered, and the adaptations that enable the spread of this species to the Subarctic are analyzed. It is established that one of the key factors that caused the change in the range of this species is the northward distribution of shrubs and, hence, the biomass of insects (available food items of these birds).