Records of climatic change in the Canadian Arctic: towards calibrating oxygen isotope data with geothermal data

Beltrami, Hugo; Taylor, Alan E.

doi:10.1016/0921-8181(95)00006-2

Cited by 44 publications

(37 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This large magnitude of GST warming in Western Canada is confirmed by temperature anomalies from borehole temperature profiles measured in southwestern Manitoba and North Dakota (Gosnold et al 1997). Similar evidence of GST warming following a cold period with its minimum GST in the early to mid-19th century has been found from boreholes across northern North America: Quebec and Ontario (Beltrami et al 1992, Wang et al 1992, the midwestern United States (Harris & Chapman 1998), Manitoba (Guillou-Frottier et al 1998, and the Canadian Arctic (Beltrami & Taylor 1995).…”

Section: Introductionsupporting

confidence: 50%

“…Instrumental SAT histories and proxy-based SAT reconstructions (mainly tree-ring studies and lacustrine oxygen isotope, sedimentation, or grain size studies) exist for the Canadian Arctic, Alberta foothills and lowlands and the northern hemisphere (Beltrami & Taylor 1995, Luckman et al 1997, Overpeck et al 1997, Campbell et al 1998, Mann et al 1998. It is commonly believed in the climate research community that climate reconstruction using tree rings provides finer temporal resolution than GSTHs derived from borehole temperatures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reconstruction of the surface warming history of western interior Canada from borehole temperature profiles and other climate information

Majorowicz¹,

Skinner²

2001

Clim. Res.

View full text Add to dashboard Cite

Over the past several decades annual surface air temperature (SAT) warming in western interior Canada has been more than twice that of the global average. Inversions of the temperature profiles in boreholes throughout this large region provide evidence of anomalously high ground surface temperature (GST) warming trends between the mid-19th century and present. Previous studies have identified strong SAT/GST associations throughout this region for the 20th century. This analysis of the composite, century-scale, regional GST histories (GSTHs) is based on the deepest available borehole temperature logs from the Foreland Sedimentary Basin in western and northern Canada, east of the Cordillera. Although separated by almost 20°latitude, there is strong regional correlation (r = 0.98) between the GSTHs developed from northern (boreal forest) and southern (prairie grassland) boreholes. When filtered, the GSTHs of western Canada correlate strongly with the northern hemisphere (r = 0.80) and the Canadian Arctic (r = 0.86) high temporal resolution proxy climate histories. Strong correlation also exists between the prairie grassland GSTH curve and the tree-ring-based surface summer temperature history from the Columbia Icefield in the Canadian Rocky Mountains close to Athabasca Glacier (r = 0.95). These findings strongly suggest that the similar, but enhanced, SAT warming signal identified by GSTHs makes western interior Canada a strong indicator region of global warming.

show abstract

Section: Introductionsupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Reconstruction of the surface warming history of western interior Canada from borehole temperature profiles and other climate information

Majorowicz¹,

Skinner²

2001

Clim. Res.

View full text Add to dashboard Cite

show abstract

“…The magnitude of the recent warming is about the same as the ∼ 1-2 K warming for the period of 1850 to 2000 inferred from several studies in the southern portion of the Superior Province Shen and Beck, 1992; and less than the very pronounced warming in the eastern Canadian Arctic (Beltrami and Taylor, 1995;Taylor et al, 2006;. The sites are located in a region described as discontinuous permafrost, where ground temperatures are slightly below freezing, at least according to the Canadian and world permafrost maps.…”

Section: Discussionmentioning

confidence: 70%

“…Studies on Ellesmere Island (above 60 • N) have shown varying trends, confirming that temperatures do not increase uniformly over Arctic regions. Taylor et al (2006) reconstructed the 500-year GST history from three boreholes and found a 3 K warming since the LIA minimum, ∼ 200 yr BP, which is consistent with Beltrami and Taylor (1995) results and the oxygen isotopes studies on ice cores from the region (Fisher and Koerner, 1994). used three temperature-depth profiles in a region with continuous permafrost at the northernmost tip of Québec to infer the GST history.…”

Section: Introductionmentioning

confidence: 58%

Climate trends in northern Ontario and Québec from borehole temperature profiles

2016

Self Cite

View full text Add to dashboard Cite

Abstract. The ground surface temperature histories of the past 500 years were reconstructed at 10 sites containing 18 boreholes in northeastern Canada. The boreholes, between 400 and 800 m deep, are located north of 51 • N and west and east of James Bay in northern Ontario and Québec. We find that both sides of James Bay have experienced similar ground surface temperature histories with a warming of 1.51 ± 0.76 K during the period of 1850 to 2000, similar to borehole reconstructions for the southern portion of the Superior Province and in agreement with available proxy data. A cooling period corresponding to the Little Ice Age was found at only one site. Despite permafrost maps locating the sites in a region of discontinuous permafrost, the ground surface temperature histories suggest that the potential for permafrost was minimal to absent over the past 500 years. This could be the result of air surface temperature interpolation used in permafrost models being unsuitable to account for the spatial variability of ground temperatures along with an offset between ground and air surface temperatures due to the snow cover.

show abstract

“…The phase-space representations of temperature time series with other meteorological variables can thus be used for a quick diagnostics of other features of their interdependence. The detection of the relationships between borehole temperature data and other meteorological or climatic variables may represent an essential step in research and facilitate the examination of the underlying physical processes [17] and the development of multiple linear regression models that relate ground temperatures to other climatic information [18] [19].…”

Section: Mixed Orbitsmentioning

confidence: 99%

Air-Ground Temperature Coupling: Analysis by Means of Thermal Orbits

Čermák¹,

Bodri²

2016

ACS

View full text Add to dashboard Cite

Long-term measurements of air, near-surface (soil) and ground temperatures that were collected between 1994 and 2013 at the drill site of the Geothermal Climate Change Observatory (Prague) were analyzed to understand the relationship between these variables and to reveal the mechanisms of heat transport at the land-atmosphere boundary layer. The 2D Thermal Orbit (TO) method was applied to detect regularities that were hidden in noisy and highly variable temperature time series. The results showed that the temperatures at shallow depths were affected by surface air temperature (SAT) variations on seasonal and annual time scales and could be regarded as an accurate proxy for low frequency temperature variations at the Earth's surface. Only low-frequency/ high-amplitude surface temperature variations penetrate into the subsurface because of strong damping and the filtering effect of the ground surface. The borehole temperatures have good potential to capture temperature variations (periodicities) over long time scales that cannot be detected in the SAT series themselves because of the interference of higher frequency noise. The TO technique is a useful and powerful tool to quickly obtain diagnostics of the presence of long periodicities in borehole temperature time series.

show abstract

Records of climatic change in the Canadian Arctic: towards calibrating oxygen isotope data with geothermal data

Cited by 44 publications

References 24 publications

Reconstruction of the surface warming history of western interior Canada from borehole temperature profiles and other climate information

Reconstruction of the surface warming history of western interior Canada from borehole temperature profiles and other climate information

Climate trends in northern Ontario and Québec from borehole temperature profiles

Air-Ground Temperature Coupling: Analysis by Means of Thermal Orbits

Contact Info

Product

Resources

About