John D Jacobs
Biographic Data
| ID | 1347296 |
|---|---|
| NAME | John D Jacobs |
| GIVEN NAMES | John D |
| FAMILY NAME | Jacobs |
| SIGNATURE | JACOBS J D |
| AFFILIATIONS | Memorial University of Newfoundland |
| VERIFIED | No |
| TOTAL WORKS | 12 |
| TOTAL CITATIONS | 7 |
| WORKS AS AUTHOR | 12 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1973 |
| LATEST PUBLICATION YEAR | 2015 |
| H-INDEX | 1 |
Complex Changes in Plant Communities across a Subarctic Alpine Tree Line in Labrador, Canada + Supplementary Appendix Table (See Article Tools)
As climate warms, abiotic factors, as well as plant community and biodiversity structure, may constrain or promote the movement of ecotone boundaries. Our study sought to examine how plant communities change across the tree-line ecotone of the Mealy Mountains in Labrador, Canada. We established eight transects (50–100 m in length) along an elevation gradient in three tree-line zones (forest, forest-tundra, and alpine-tundra) and recorded all spec…
Canadian interprovincial employees in the Canadian Arctic
One of the ongoing debates in Arctic labor research is the impact of the fly-in/fly-out worker populations on northern labor markets. A problem that researchers encounter is the lack of standardized national metrics for tracking migratory employees. However, a long-awaited dataset deriving from Statistics Canada's Alberta Shadow Population research using Canada Revenue Agency information has recently become available, which provides statistics on…
Climatology of the Forest-Tundra Ecotone at a Maritime Subarctic-Alpine Site, Mealy Mountains, Labrador
Climatological investigations were conducted from 2001 to 2009 in the central Mealy Mountains, Labrador (53.6 ̊ N), as part of interdisciplinary research on tree line ecology and climate change. The aim was to describe local climatic and edaphic variables along an altitudinal gradient from the closed forest edge to the alpine tundra and to relate recent changes in regional climate to potential changes in the forest tundra ecotone. Results show re…
Teaching and learning about climate change with Innu Environmental Guardians
Impacts related to climate change are commonly reported in northern Canada. Labrador Innu have a multi-millennial history in this area, putting them in a good position to document and interpret these changes. Western Science monitoring initiatives are commonplace throughout northern areas and offer one approach for answering questions related to ecosystem change. Since 2001, the Innu Environmental Guardians Training Program has offered modules co…
Regional Perspectives on 20th‐century Environmental Change
Regional Patterns of Temperature and Precipitation for Newfoundland and Labrador During the Past Century
We have analyzed the mid‐to‐late 20th century instrumental record of winter and summer temperatures and precipitation for six stations representative of Newfoundland subregions and of central and coastal Labrador. In addition, these modern records have been extended into the 1800s by using portions of records from Belle Isle and the city of St. John's. For these two lengthier records, several ‘epochs' of alternating relatively high or low charact…
Climate and Vegetation of the Interior Lowlands of Southern Baffin Island
The interior of southern Baffin Island between 64 N and 68 N latitude is a mainly lowland area over 50 000 km2 in extent, containing two large lakes (Amadjuak and Nettilling) and numerous smaller lakes and ponds. This area is important as summer range for caribou and a variety of birds, and there is evidence for a human presence as early as 3000 B.P. Field studies between 1984 and 1988 and the operation of climatic autostations from 1987 to 1995 …
Introduction
Aspects of Thule Culture Adaptations in Southern Baffin Island
An archaeological sequence of Neo-Eskimo occupations, based upon excavations of eight Thule winter houses near Lake Harbour, Baffin Island, is outlined, beginning around A.D. 1100 and extending into the present century. Relationships between past climatic events, local environmental characteristics, and the organization of Neo-Eskimo subsistence-settlement systems are traced throughout this period of time, based on analysis of artifactual, faunal…
Recent Year-to-year Variations in Seasonal Temperatures and Sea Ice Conditions in the Eastern Canadian Arctic
Mean summer and winter temperatures for the 1957-1978 period have been analyzed for four eastern Arctic stations. Standard deviations on the order of 3° C in winter and 10° C in summer indicate the magnitude of the interannual variations, and these departures are found to be synchronous over the region. Several indices of sea ice severity also show significant year-to-year variations, but these are not spatially coherent. Relationships between cl…
Fast ice characteristics, with special reference to the eastern Canadian Arctic
Arctic sea ice is currently receiving increasing attention, both in relation to technological problems associated with resources development and shipping (Walker and Penney, 1973), and to basic research questions. The polar pack ice in the Beaufort Sea, for example, is the focus of the Arctic Ice Dynamics Joint Experiment (AIDJEX) (Untersteiner, 1974), while an analysis of physical links between the characteristics of polar surfaces and climate i…
University of Colorado
SEA ICE. Studies of surface energy budgets on the fast ice at Broughton Island 67°35' N, 63°50' W) were undertaken from late May to August 1972. The program included micrometeorological measurements on the fast ice and ice thickness surveys. Climatological observations including radiation studies begun in June 1971 by The Institute of Arctic and Alpine Research at a site in Broughton village were continued. The summer of 1972 was one of unusually…
Regional Perspectives on 20th‐century Environmental Change
Regional Patterns of Temperature and Precipitation for Newfoundland and Labrador During the Past Century
We have analyzed the mid‐to‐late 20th century instrumental record of winter and summer temperatures and precipitation for six stations representative of Newfoundland subregions and of central and coastal Labrador. In addition, these modern records have been extended into the 1800s by using portions of records from Belle Isle and the city of St. John's. For these two lengthier records, several ‘epochs' of alternating relatively high or low charact…
Introduction
Fast ice characteristics, with special reference to the eastern Canadian Arctic
Arctic sea ice is currently receiving increasing attention, both in relation to technological problems associated with resources development and shipping (Walker and Penney, 1973), and to basic research questions. The polar pack ice in the Beaufort Sea, for example, is the focus of the Arctic Ice Dynamics Joint Experiment (AIDJEX) (Untersteiner, 1974), while an analysis of physical links between the characteristics of polar surfaces and climate i…
University of Colorado
SEA ICE. Studies of surface energy budgets on the fast ice at Broughton Island 67°35' N, 63°50' W) were undertaken from late May to August 1972. The program included micrometeorological measurements on the fast ice and ice thickness surveys. Climatological observations including radiation studies begun in June 1971 by The Institute of Arctic and Alpine Research at a site in Broughton village were continued. The summer of 1972 was one of unusually…
Fast ice characteristics, with special reference to the eastern Canadian Arctic
Arctic sea ice is currently receiving increasing attention, both in relation to technological problems associated with resources development and shipping (Walker and Penney, 1973), and to basic research questions. The polar pack ice in the Beaufort Sea, for example, is the focus of the Arctic Ice Dynamics Joint Experiment (AIDJEX) (Untersteiner, 1974), while an analysis of physical links between the characteristics of polar surfaces and climate i…
Recent Year-to-year Variations in Seasonal Temperatures and Sea Ice Conditions in the Eastern Canadian Arctic
Mean summer and winter temperatures for the 1957-1978 period have been analyzed for four eastern Arctic stations. Standard deviations on the order of 3° C in winter and 10° C in summer indicate the magnitude of the interannual variations, and these departures are found to be synchronous over the region. Several indices of sea ice severity also show significant year-to-year variations, but these are not spatially coherent. Relationships between cl…
Aspects of Thule Culture Adaptations in Southern Baffin Island
An archaeological sequence of Neo-Eskimo occupations, based upon excavations of eight Thule winter houses near Lake Harbour, Baffin Island, is outlined, beginning around A.D. 1100 and extending into the present century. Relationships between past climatic events, local environmental characteristics, and the organization of Neo-Eskimo subsistence-settlement systems are traced throughout this period of time, based on analysis of artifactual, faunal…
Introduction
Climate and Vegetation of the Interior Lowlands of Southern Baffin Island
The interior of southern Baffin Island between 64 N and 68 N latitude is a mainly lowland area over 50 000 km2 in extent, containing two large lakes (Amadjuak and Nettilling) and numerous smaller lakes and ponds. This area is important as summer range for caribou and a variety of birds, and there is evidence for a human presence as early as 3000 B.P. Field studies between 1984 and 1988 and the operation of climatic autostations from 1987 to 1995 …
Regional Perspectives on 20th‐century Environmental Change
Regional Patterns of Temperature and Precipitation for Newfoundland and Labrador During the Past Century
We have analyzed the mid‐to‐late 20th century instrumental record of winter and summer temperatures and precipitation for six stations representative of Newfoundland subregions and of central and coastal Labrador. In addition, these modern records have been extended into the 1800s by using portions of records from Belle Isle and the city of St. John's. For these two lengthier records, several ‘epochs' of alternating relatively high or low charact…
Teaching and learning about climate change with Innu Environmental Guardians
Impacts related to climate change are commonly reported in northern Canada. Labrador Innu have a multi-millennial history in this area, putting them in a good position to document and interpret these changes. Western Science monitoring initiatives are commonplace throughout northern areas and offer one approach for answering questions related to ecosystem change. Since 2001, the Innu Environmental Guardians Training Program has offered modules co…
Climatology of the Forest-Tundra Ecotone at a Maritime Subarctic-Alpine Site, Mealy Mountains, Labrador
Climatological investigations were conducted from 2001 to 2009 in the central Mealy Mountains, Labrador (53.6 ̊ N), as part of interdisciplinary research on tree line ecology and climate change. The aim was to describe local climatic and edaphic variables along an altitudinal gradient from the closed forest edge to the alpine tundra and to relate recent changes in regional climate to potential changes in the forest tundra ecotone. Results show re…
Complex Changes in Plant Communities across a Subarctic Alpine Tree Line in Labrador, Canada + Supplementary Appendix Table (See Article Tools)
As climate warms, abiotic factors, as well as plant community and biodiversity structure, may constrain or promote the movement of ecotone boundaries. Our study sought to examine how plant communities change across the tree-line ecotone of the Mealy Mountains in Labrador, Canada. We established eight transects (50–100 m in length) along an elevation gradient in three tree-line zones (forest, forest-tundra, and alpine-tundra) and recorded all spec…
Canadian interprovincial employees in the Canadian Arctic
One of the ongoing debates in Arctic labor research is the impact of the fly-in/fly-out worker populations on northern labor markets. A problem that researchers encounter is the lack of standardized national metrics for tracking migratory employees. However, a long-awaited dataset deriving from Statistics Canada's Alberta Shadow Population research using Canada Revenue Agency information has recently become available, which provides statistics on…
Geography (12 works) · Climate change and permafrost (7 works) · Ecology (7 works) · Geology (7 works) · Geology (7 works) · Physical geography (7 works) · Climatology (6 works) · Environmental Science (6 works) · Arctic (5 works) · Biology (5 works)