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Adrienne Tivy
University of Calgary
15Publications
9H-index
315Citations
Publications 15
Newest
#1Tom CarrieresH-Index: 4
#2Alain CayaH-Index: 6
Last.Adrienne TivyH-Index: 9
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#1Adrienne Tivy (UAF: University of Alaska Fairbanks)H-Index: 9
#2Stephen E. L. Howell (EC: Environment Canada)H-Index: 21
Last.John J. Yackel (U of C: University of Calgary)H-Index: 20
view all 8 authors...
[1] The Canadian Ice Service Digital Archive (CISDA) is a compilation of weekly ice charts covering Canadian waters from the early 1960s to present. The main sources of uncertainty in the database are reviewed and the data are validated for use in climate studies before trends and variability in summer averaged sea ice cover are investigated. These data revealed that between 1968 and 2008, summer sea ice cover has decreased by 11.3% ± 2.6% decade−1 in Hudson Bay, 2.9% ± 1.2% decade−1 in the Cana...
#1Adrienne Tivy (U of C: University of Calgary)H-Index: 9
Last.Thomas CarrieresH-Index: 1
view all 5 authors...
Abstract Canonical correlation analysis (CCA) is used to estimate the levels and sources of seasonal forecast skill for July ice concentration in Hudson Bay over the 1971–2005 period. July is an important transition month in the seasonal cycle of sea ice in Hudson Bay because it is the month when the sea ice clears enough to allow the first passage of ships to the Port of Churchill. Sea surface temperature (quasi global, North Atlantic, and North Pacific), Northern Hemisphere 500-mb geopotential...
#1Emma J. StewartH-Index: 17
#2Adrienne TivyH-Index: 9
Last.Dianne DraperH-Index: 11
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Tourism in the Hudson Bay region of central northern Canada generally is associated with non-consumptive forms of nature-based activities (such as polar bear viewing). However, the region has experienced variable growth in the cruise sector in recent years. This paper examines patterns of cruise activity in all subregions of the Hudson Bay region during three cruise seasons (2006, 2008, and 2009) and mainly reveals a pattern of decline. Since the prevalence of sea ice is an important part of vis...
#1Emma J. Stewart (U of C: University of Calgary)H-Index: 17
Last.Adrienne TivyH-Index: 9
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Although cruise travel to the Canadian Arctic has grown steadily since 1984, some commentators have suggested that growth in this sector of the tourism industry might accelerate, given the warming effects of climate change that are making formerly remote Canadian Arctic communities more accessible to cruise vessels. Using sea-ice charts from the Canadian Ice Service, we argue that Global Climate Model predictions of an ice-free Arctic as early as 2050–70 may lead to a false sense of optimism reg...
#1Adrienne TivyH-Index: 9
#2Bea AltH-Index: 9
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Each spring the North American Ice Service (NAIS) issues a summer seasonal outlook for North American Arctic Waters. The outlook contains a detailed break-up forecast that includes predictions of ice events such as clearing and fracture dates. An empirical method to seasonally forecast these sea ice events has been developed at the Canadian Ice Service to assist in the preparation of the seasonal outlooks. The method has been automated in-house and the regression based seasonal forecasting model...
#1Stephen E. L. Howell (UW: University of Waterloo)H-Index: 21
#2Adrienne Tivy (U of C: University of Calgary)H-Index: 9
Last.Claude R. Duguay (UW: University of Waterloo)H-Index: 29
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[1] Estimates of annual sea ice melt onset, freeze onset, and melt duration are made within the Canadian Arctic Archipelago (CAA) using SeaWinds/QuikSCAT data from 2000 to 2007. The average date of melt onset occurred on day 150, the average freeze onset occurred on day 266, and the average number of days of melt was 116. Melt onset occurred first, and freeze onset occurred last within the Amundsen, Western Arctic Waterway, and Eastern Parry Channel regions, whereas the reverse occurred in the Q...
#1Stephen E. L. Howell (UW: University of Waterloo)H-Index: 21
#2Adrienne Tivy (U of C: University of Calgary)H-Index: 9
Last.Steve McCourt (EC: Environment Canada)H-Index: 7
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Abstract Numerous studies have reported decreases in Arctic sea‐ice cover over the past several decades and General Circulation Model (GCM) simulations continue to predict future decreases. These decreases — particularly in thick perennial or multi‐year ice (MYI) — have led to considerable speculation about a more accessible Northwest Passage (NWP) as a transit route through the Canadian Arctic Archipelago (CAA). The Canadian Ice Service Digital Archive (CISDA) is used to investigate dynamic imp...
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