// OVERVIEW - Establish the data to be displayed
var data = new Array(
		     new Array("Historical temperature trends (night-time lows)", "Winter, summer, and annual temperature trends over 1900-2004 show that night-time low temperature has been increasing, particularly in winter. Historical trends show only how climate has changed during the specified period in the past. For example, the trend from 1950 differs considerably from the trend for 1900-2004. Finally, trends should not be extended into the future - see projections for information on future climate.","Data: CANGRID (50 km), Meteorological Service of Canada<br>Adapted from Zhang et al. 2000.<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","ZHANG_TMIN_DJF_TRENDS04_50k.jpg","ZHANG_TMIN_JJA_TRENDS04_50k.jpg","ZHANG_TMIN_TRENDS04_50k.jpg"),
		     new Array("Historical temperature trends (day-time highs)", "Winter, summer, and annual temperature trends over 1900-2004 show that day-time high temperature has been increasing in winter and as a whole for the year. Summer temperatures have been decreasing over the past hundred years at many locations in the province. More recent trends (past 30-50 years) are for increases in all seasons. Historical trends show only how climate has changed during the specified period in the past. For example, the trend from 1950 differs considerably from the trend for 1900-2004. Finally, trends should not be extended into the future - see projections for information on future climate.","Data: CANGRID (50 km), Meteorological Service of Canada<br>Adapted from Zhang et al. 2000.<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","ZHANG_TMAX_DJF_TRENDS04_50k.jpg","ZHANG_TMAX_JJA_TRENDS04_50k.jpg","ZHANG_TMAX_TRENDS04_50k.jpg"),
		     new Array("Historical precipitation trends", "Winter, summer, and annual precipitation trends over 1900-2004 shows relative precipitation has been increasing across northern BC, particularly during the winter in the north east.  Historical trends show only how climate has changed during the specified period in the past. For example, the trend from 1950 differs considerably from the trend for 1900-2004. Finally, trends should not be extended into the future - see projections for information on future climate.","Data: CANGRID (50 km), Meteorological Service of Canada<br>Adapted from Zhang et al. 2000.<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","ZHANG_PREC_TRENDS04_50k.jpg","ZHANG_PREC_JJA_TRENDS04_50k.jpg","ZHANG_PREC_DJF_TRENDS04_50k.jpg"),
		     new Array("Snow trends", "Trends show that snow has been decreasing from 1951-2007 at many locations in southern British Columbia. The map below shows the effect on the average amount of snow on the ground (as of April 1st), expressed as snow water equivalent (SWE). April 1st SWE is a measure of accumulated snowfall over the winter. Climate variability also has a large influence on snowpack as shown in the ENSO/PDO maps. Historical trends show only how climate has changed during the specified period in the past. For example, the trend from 1950 differs considerably from the trend for 1900-2004. Finally, trends should not be extended into the future - see projections for information on future climate.","Data: River Forecast Centre<br>Adapted from Zhang et al. 2000<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","SWE51-07u.jpg"),
		     new Array("Baseline temperature and precipitation", "These maps show the average historical climate for BC from 1961-1990 observations. The high resolution (4 km) values are based on the PRISM interpolation of climate station data which considers physical information such as elevation and aspect. The map is considered more robust in areas where there are more stations (shown as circles).","Data: PRISM climate data (Oregon State University) and Meteorological Service of Canada Adjusted Historical Canadian Climate Data climate station locations.<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","PRISM_TEMP_6190.jpg","PRISM_PREC_6190.jpg"),
		     new Array("ENSO temperature and precipitation", "The El Nino/Southern Oscillation (ENSO) is a phenomenon that effects BC climate on a year-to-year basis. It has warm (El Nino), cold (La Nina), and neutral phases. The maps below show the average influence of El Nino and La Nina years in BC based on historical data. ENSO has a considerable influence on winter conditions in a given year (influence of up to 6&deg;C and 20% change in precipitation at some locations). Individual ENSO years will differ from the average shown below.","Data: CANGRID (50 km), Meteorological Service of Canada<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment", "ENSOPDO_TMEAN1_DJF.jpg","ENSOPDO_TMEAN3_DJF.jpg","ENSOPDO_PREC1_DJF.jpg","ENSOPDO_PREC3_DJF.jpg"),
		     new Array("PDO temperature and precipitation", "The Pacific Decadal Oscillation (PDO) is a pattern of climate variability on a longer time scale - each phase lasts 20-30 years. The average winter temperature and precipitation during PDO warm and cool phases are shown below. ENSO events (see previous page) that occur during the warm phase of PDO are on average warmer than during the cold phase.","Data: CANGRID (50 km), Meteorological Service of Canada<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","ENSOPDO_TMEAN4_DJF.jpg","ENSOPDO_TMEAN5_DJF.jpg","ENSOPDO_PREC4_DJF.jpg","ENSOPDO_PREC5_DJF.jpg"),
		     new Array("ENSO/PDO snow", "The combined effects of ENSO and PDO (see previous two pages) on temperature and precipitation in turn influence snow. The maps below show the effect on the average amount of snow on the ground (as of April 1st), expressed as snow water equivalent (SWE). April 1st SWE is a measure of accumulated snowfall over the winter. Decreased snowpack (red triangles) occurred across most of BC on average during El Nino years and during the warm phase of the Pacific Decadal Oscillation. Conversely, increased snowpack (blue triangles) occurred across most of BC on average during La Nina years and during the cold phase of the Pacific Decadal Oscillation.","Data: River Forecast Centre<br>Adapted from Zhang et al. 2000<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","SWE_TC1.jpg","SWE_TC3.jpg","SWE_TC4.jpg","SWE_TC5.jpg"),
		     new Array("Projected temperature maps", "Projected changes in winter, summer, and annual temperature by 2050s compared with the 1961-1990 baseline climatology are shown. The maps show warming by the 2050s of 2-5&deg;C in the annual average. The projected temperature increase is generally larger from south to north in the winter and larger in the winter than in summer. Results are from a single Regional Climate Model (RCM) projection on a 45 km grid. The map illustrates one plausible future temperature change by the 2050s, but must be considered in combination with a range of projections (see subsequent pages).","Climate modelling: The Canadian Regional Climate Model version 4.1.1 (CRCM4) was developed by the Ouranos Consortium in collaboration with the Canadian Centre for Climate Modelling and Analysis (Environment Canada).<br>RCM data: provided by the Ouranos Climate Simulations Team for runs acs and act forced with CGCM3 following the A2 emissions scenario run 4.<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","CRCM_TEMP2050_DJF.jpg","CRCM_TEMP2050_JJA.jpg","CRCM_TEMP2050.jpg"),
		     new Array("Projected precipitation maps", "Projected changes in winter, summer, and annual precipitation by 2050s are shown as % differences from 1961-1990 baseline climatology. Relative increases are largest in Northern BC and Yukon. Results are from a single Regional Climate Model (RCM) projection on a 45 km grid. The map illustrates one plausible future precipitation change by the 2050s, but must be considered in combination with a range of projections (see subsequent pages). Small increases (<10%) are particularly uncertain.","Climate modelling: The Canadian Regional Climate Model version 4.1.1 (CRCM4) was developed by the Ouranos Consortium in collaboration with the Canadian Centre for Climate Modelling and Analysis (Environment Canada).<br>RCM data: provided by the Ouranos Climate Simulations Team for runs acs and act forced with CGCM3 following the A2 emissions scenario run 4.<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","CRCM_PREC2050_DJF.jpg","CRCM_PREC2050_JJA.jpg","CRCM_PREC2050.jpg"),
		     new Array("Projected snow maps", "Projected changes in spring snow water equivalent (SWE) by 2050s are shown as % differences from 1961-1990 baseline climatology. Decreases are apparent at most locations due to increased temperatures. At high elevation and more northerly latitudes (locations with the coldest winter temperatures), increased snowpack is projected despite warming due to increased precipitation. The maps show the results from a single Regional Climate Model (RCM) projection on a 45 km grid. The map illustrates one plausible future precipitation change by the 2050s, but must be considered in combination with a range of projections (see subsequent pages).","Climate modelling: The Canadian Regional Climate Model version 4.1.1 (CRCM4) was developed by the Ouranos Consortium in collaboration with the Canadian Centre for Climate Modelling and Analysis (Environment Canada).<br>RCM data: provided by the Ouranos Climate Simulations Team for runs acs and act forced with CGCM3 following the A2 emissions scenario run 4.<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","CRCM_SNOW_MAMw.jpg"),
		     new Array("Projected temperature time series", "The plot below shows projected future BC temperature changes over time. Each coloured line represents a different climate model projection (based on 15 Global Climate Models each forced with two greenhouse gas emissions scenarios: A2 (solid lines) and B1 (dashed lines)). Projections are smoothed and shown as differences from the 1961-1990 climatology. The black line is historical BC temperature which shows the magnitude of year-to-year temperature variability for comparison to future projections. Note that individual historical years are not comparable to the GCM results. The horizontal orange line shows the 2050s projected temperature increase for BC from the Canadian Global Climate Model (CGCM3 following A2, run 4), which is used to force the RCM projections shown on previous pages. It is one of the warmest (and also one of the wettest) projections. All projections show warming by the 2050s; the range of projections is +1.2 to 2.5&deg;C (based on the 10th and 90th percentile of results) and the average projection is +1.7&deg;C.","Climate modelling: contributed to Intergovernmental Panel on Climate Change by several international climate modelling centres.<br>GCM data: Lawrence Livermore National Laboratory<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","tempscenarios.jpg"),
		     new Array("Projected temperature and precipitation range", "The range of BC projected future temperature and precipitation is compared to the historical range of year-to-year climate variability. The plot shows that projected changes to the average temperature are larger than historical variability but projected changes to precipitation are smaller than historical variability. The plot shows the future projections of the average BC temperature and precipitation for the 2020s, 2050s, and 2080s include considerable uncertainty, represented by the ranges shown (based on the 10th and 90th percentiles from 30 Global Climate Model projections). These ranges show only the projected change to the vertical blue bar. Historical variability is shown for the historical period by the horizontal blue bar (+/- 2 standard deviations from observations); future variability is not shown.","Climate modelling: contributed to Intergovernmental Panel on Climate Change by several international climate modelling centres.<br>GCM data: Lawrence Livermore National Laboratory<br>Analysis: PCIC staff<br>Support: BC Hydro and BC Ministry of Environment","range.jpg")
		     );