Volatile N loss from decomposing green manure

Non-Peer Reviewe

Precipitation trends on the Canadian prairie

Non-Peer ReviewedThe amount and timing of precipitation on the Canadian Prairie is critical to grain production. Information on the precipitation trend is therefore vital to this region. Regression analysis was used to establish linear trends of precipitation amounts and number of precipitation events at 37 stations with 75 years of record (prior to and including 1995) across the Canadian Prairie. There has been a significant increase in the number of precipitation events mainly due to an increase in the number of low-intensity events. As such precipitation events are not getting more intense. From 1921 to 1995 on the Canadian Prairie, the number of precipitation events (excluding events that are 0.5 mm or less) has increased by 16 events, and precipitation and rainfall amounts have increased by 0.62 mm and 0.60 mm per annum, respectively. During the period from 1921 to 1960 the trends in precipitation, rainfall and snowfall were not statistically different from zero. However, from 1961 to 1995, snowfall has declined by 0.95 mm per year. The trends in the most recent period (1961 to 1995) were also significantly different from those in the 1921 to 1960 period for snowfall. The difference in trends between the two periods for snowfall, combined with the inverse relationship in the rainfall-snowfall trends suggest that these trends may be related to climate change

Seasonal and spatial patterns of rainfall trends on the Canadian prairie

Non-Peer ReviewedWe used regression analysis to establish linear trends of annual and seasonal rainfall amounts and number of events at 140 stations with 40 years of record from 1956 to 1995 across the Canadian Prairie. There has been a significant increase in the rainfall amounts and number of events. Increase in annual rainfall was 51 mm or about 16% of the 40 yr mean while the number of rainfall events increased by 17 or about 29%. Spring (January to April) experienced proportionately the largest increase, with amount and number increasing by 46% and 64%, respectively. This may be related to the conversion of snow to rain as a result of climatic warming during this period. The increase in rainfall amount and number of events during summer (May to August) were similar to the annual patterns. There was no significant increase in rainfall amount and number of events during the fall season (September to December). The increases in rainfall amount and number of events were not uniform across the prairies, with the least increase in rainfall amount and number of events in southern Manitoba, and the largest increase in Alberta and Saskatchewan. Little or no change in amounts occurred in the northern portion of the prairie provinces. The results confirmed that the prairies are not getting drier, however, there are seasonal and spatial differences in rainfall trends

Influence of snow on wind erosion processes in the chinook belt of southern Alberta

Non-Peer Reviewe

Search for leptophobic Z ' bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV

Peer reviewe

Search for black holes and other new phenomena in high-multiplicity final states in proton-proton collisions at root s=13 TeV

Peer reviewe

Measurements of differential production cross sections for a Z boson in association with jets in pp collisions at root s=8 TeV

Peer reviewe

Search for high-mass diphoton resonances in proton-proton collisions at 13 TeV and combination with 8 TeV search

Peer reviewe