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- 3fe9c479-3cb5-45bf-8f4d-637282dccfa3 type Project @default.
- 3fe9c479-3cb5-45bf-8f4d-637282dccfa3 type Variable @default.
- 3fe9c479-3cb5-45bf-8f4d-637282dccfa3 broader 0c89f3f4-7ab1-43ce-89ee-795d35f0e30a @default.
- 3fe9c479-3cb5-45bf-8f4d-637282dccfa3 broader fb0b9fcd-5c96-4989-8c64-a479bbed83ab @default.
- 3fe9c479-3cb5-45bf-8f4d-637282dccfa3 definition "The Arctic will experience some of the more dramatic environmental changes in the 21st century as surface air temperatures continue to rise in response to anthropogenic forcing This will lead to an intensification of the Arctic hydrologic cycle At regional scales however it remains unknown how precipitation evaporation and river discharge are evolving in a warmer world This study will investigate the role of largescale atmospheric anomalies in the Canadian northern hydrologic cycle with a focus on the IPY Specifically we will address the following science questions1 What are the dominant largescale atmospheric teleconnections that affect northern Canada2 What is the role of these teleconnections and their relative contributions to the atmospheric and surface water budgets of highlatitude river basins in a changing environment3 How will the meteorological and hydrological variables differ from their mean state during the IPY and how will they evolve in the near futureTo answer these important science questions the following work will be conducted according to the proposed timeline20062007 Historical meteorological and hydrological data will be analysed Relationships between atmospheric teleconnections such as the Arctic Oscillation AO El NiñoSouthern Oscillation ENSO and the Pacific Decadal Oscillation PDO and the state of the hydrologic budget over northern Canada will be evaluated The European Centre for MediumRange Weather Forecasts ECMWF Reanalysis ERA40 data set will provide global meteorological data that will be supplemented by observed river discharge from the Canadian Hydrometric Database HYDAT and observed precipitation and temperature from the Climate Research Unit CRU of the University of East Anglia The analysis will cover the period 19642004 for which spatial and temporal coverage is best and focus on the Mackenzie and Hudson Bay river basins20072008 During the IPY intensive observing period realtime monitoring of the atmospheric teleconnection indexes and of the hydrologic budget in northern Canada will be maintained The daily and recent state of atmospheric and hydrologic variables including daily assessments of their deviations from the mean will be reported on our website to provide other researchers this valuable information20082009 A diagnostic study of the atmospheric and hydrologic state over northern Canada during the IPY will be conducted This work will focus on the anomalies during the IPY from the mean state 19642004 An assessment of trends in the atmospheric teleconnection indexes and in the hydrometeorological variables will provide insights on the possible future state of northern Canadas hydrologic cycleSummary provided by httpclassicipyorgdevelopmenteoiproposaldetailsprintphpid159" @default.
- 3fe9c479-3cb5-45bf-8f4d-637282dccfa3 prefLabel "ATMOSPHERIC_TELECONNECTIONS_AND" @default.