Fire Season Prediction for Canada, 2015€¦ · The 2014 fire season was an extreme year with...
Transcript of Fire Season Prediction for Canada, 2015€¦ · The 2014 fire season was an extreme year with...
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Fire Season Prediction
for Canada, 2015
Kerry Anderson
Canadian Forest Service
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Introduction
The Canadian Forest Service is now presenting
monthly and seasonal forecast maps through the
Canadian Wildland Fire Information System (CWFIS).
These are based on Environment Canada’s monthly
and seasonal forecasts, information contained in the
CWFIS, and advice provided by provincial agencies.
This presentation will summarize the current
conditions in Canada and a forecast for the 2015 fire
season.
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Canadian Wildland Fire
Information System
The Canadian
Wildland Fire
Information System
calculates the fire
weather and fire
behaviour
conditions across
the country.
Maps are displayed
over the Internet.
http://cwfis.cfs.nrcan.gc.ca/
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Methodology
1. Calculate spring start-up conditions based on fall drought
code (DC) values and over-winter precipitation amounts,
2. Calculate average daily weather for weather stations across
country,
3. Incorporate Environment Canada’s seasonal predictions,
4. Determine the fire severity based on the ratio of forecasted
over average monthly severity rating (MSR).
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Methodology 1. Fall conditions to Spring startup 2. Calculate average daily weather
4. Calculate fire weather anomaly 3. Apply seasonal predictions
0 50 100 150
05
10
15
20
25
30
CYEG
Days from Apr 1
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Ensemble Forecasts
The Canadian Meteorological Centre (CMC) of Environment
Canada has been providing temperature and precipitation
probabilistic forecasts based on an ensemble of ten
integrations of two climate models developed by Canadian
Center for Climate modeling and analysis (CCCma)
1. CANCM3 (which uses the atmospheric model CANAM3 (also known as
model AGCM3))
2. CANCM4 (which uses the atmospheric model CANAM4 (also known as
model AGCM4))
Forecasts are provided for the next twelve months.
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Ensemble Forecasts
Predicted temperatures and precipitation amounts
are entered into the Canadian FWI system.
Temperature Precipitation
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Ensemble Forecasts
The ensemble approach
provides a measure of
confidence indicated by
the spread of the
ensemble members.
June
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2014 Fire Season
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2014 Prediction The 2014 fire season was an extreme year with below-average number of
fires and an well above-average area burned.
5,045 fires
(avg: 7,084)
4,563,846 ha
(avg 2,272,702 ha)
Numbers based December 31 totals in CIFFC Canada Report 2014
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2014 Prediction
The 2014 fire season started out very slow and well-below average but
beginning in June, quickly escalated for BC and the Northwest Territories.
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2014 Prediction
August
May June
July September
April
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2014 Fire Activity
August
May June
July September
April
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North American Seasonal Assessment
The forecast included Yukon and BC as areas of concern in
the North American Seasonal Assessment.
July-Aug
June-July
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2014 Prediction
In summary, the forecast predicted a low fire
season throughout Canada with the only
areas of concern being BC and the Yukon.
The forecast was correct for eastern Canada
but underrated the fire activity in the west.
The prediction correctly selected BC as an
area of above-average fire conditions, but
misplaced above-average conditions in the
Yukon instead of the neighboring NWT.
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2015 Seasonal Prediction
Starting Conditions
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Spring Start-up Conditions
The Canadian Forest Fire Weather Index
(FWI) System allows for the carry-over of fall
conditions to the spring.
This is handled by the Drought Code (DC)
(similar to the 1000 hour moisture code).
All other moisture codes in the FWI system are
reset.
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Fall Conditions
Fall DC values show
extreme (dry) conditions
throughout much of
Western Canada and
the Territories.
Eastern and Northern
Canada experienced a
cold winter with much
snow, while southern
portions of the Prairies
and BC experienced a
warm winter.
Oct 15, 2014
http://cwfis.cfs.nrcan.gc.ca/maps/fw?type=dc&year=2013&month=10&day=21
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Overwinter Snowfall
Snow melt was
rapid this spring in
western Canada
leading to an early
start to the fire
season.
Eastern Canada
had late snow melt
delaying the fire
season.
http://www.natice.noaa.gov/pub/ims/ims_gif/DATA/cursnow_usa.gif
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Spring Start-up Conditions
North American
Drought Monitor
indicates scattered
patches of
abnormally dry
conditions in
Canada with
moderate drought
conditions in
southern Manitoba
and the St.
Lawrence region.
http://www.ncdc.noaa.gov/temp-and-precip/drought/nadm/nadm-maps.php
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Current Conditions
An early spring has
resulted in elevated
conditions in the
Territories, the Prairies
and the interior of BC.
http://http://cwfis.cfs.nrcan.gc.ca/
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Current Conditions
Compared to the 30 year
means, conditions in
western Canada are much
higher than normal, while
conditions in eastern
Canada are well below
normal.
http://http://cwfis.cfs.nrcan.gc.ca/
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Current Situation
BC, Alberta,
Saskatchewan,
Yukon and NWT
have experienced
most of the fire
activity.
So far, NWT has
experienced
65,011 ha burned
(an amount
typically not seen
until July).
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Current Situation The 2015 fire season was an extreme year with below-average number of
fires and an well above-average area burned.
2,549 fires
(avg: 1,929)
263,201 ha
(avg 122,472 ha)
Numbers based May 28 totals in CIFFC Situation Report
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2015 Seasonal Prediction
ENSO Pattern
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ENSO Pattern
El Niño–Southern Oscillation is a band of warm ocean water
that can develop off the western coast of South America.
Extremes in this oscillations cause extreme weather (such as
floods and droughts) in many regions of the world.
El Niño and La Nina events tend to develop during the period
Apr-Jun and they
• Tend to reach their maximum
strength during Dec-Feb
• Typically persist for 9-12 months,
though occasionally persisting for
up to 2 years
• Typically recur every 2 to 7 years
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El Niño Effects
El Niño leads to below-average precipitation in central Alberta and
Saskatchewan, southern Ontario and Nova Scotia
Summer
Temperature Precipitation
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ENSO Pattern
http:// http://iri.columbia.edu/our-expertise/climate/forecasts/enso/current/
Most models
indicate the
buildup of El
Niño conditions
this summer
(though there is
much variation
among the
models).
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ENSO Pattern
http:// iri.columbia.edu/our-expertise/climate/forecasts/enso/current
The Canadian
CMC CANSIP
model is
predicting higher
conditions.
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ENSO Pattern
http://iri.columbia.edu/our-expertise/climate/forecasts/enso/current/?enso_tab=enso-cpc_plume
The El Niño
conditions
are further
illustrated by
the
consensus of
the models.
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2015 Seasonal Prediction
CMC Forecasts
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Ensemble Forecasts
Recent medium-range
predictions based on
the North American
Ensemble Forecast
System (NAEFS)
Indicate above
average temperature
will dominate western
Canada.
June 11-18
http://weather.gc.ca/ensemble/naefs/semaine2_combinee_e.html
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Ensemble Forecasts
The probability of
precipitation over 10
mm at least one day
over the next two
weeks is low for all
but southern BC and
eastern Canada.
June 3-18
http://weather.gc.ca/ensemble/naefs/produits_e.html
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Seasonal Forecasts
June temperature anomalies are high for all but the Arctic, with the
highest anomalies centered on in Alberta.
Precipitation anomalies are low for Alberta and southern NWT and
Atlantic Canada, high for Manitoba and western Ontario.
June
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Seasonal Forecasts
July will see much of the above average conditions subside with BC as
the region still most affected.
Precipitation anomalies are negligible.
July
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Seasonal Forecasts
Above average temperatures continue to subside
Scattered patched of below average precipitation are seen in the
Prairies and southeastern BC.
August
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Seasonal Forecasts
Above average temperatures will persist across Canada into the fall.
Above average precipitation is shown only in the Yukon.
September-October-November
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2015 Seasonal Prediction
Model Predictions
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June 2015
Above-average condition are present throughout most of
Canada with the exception of parts of Ontario, Quebec
and Newfoundland. Confidence is high.
Prediction (predicted values normalized against average weather)
Confidence (standard deviation normalized against average weather)
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July 2015
Above average conditions increase to cover nearly all of
Canada though confidence is beginning to fall.
Prediction (predicted values normalized against average weather)
Confidence (standard deviation normalized against average weather)
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August 2015
Conditions begin to subside with the exception of the
southern Prairies.
Prediction (predicted values normalized against average weather)
Confidence (standard deviation normalized against average weather)
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September 2015
As fall takes hold, low forecast severity (hashed lines) is
expected to cover most of the forest area
(except southern BC).
Prediction (predicted values normalized against average weather)
Confidence (standard deviation normalized against average weather)
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Peace River 2015
For Peace River and other northern Prairie stations (e.g. Prince Albert, The
Pas), above average temperatures are driving the current elevated
conditions
Temperature Precipitation
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Peace River 2015
Elevated BUI conditions in June could carry on high CSSR conditions
into July and August.
BUI CSSR
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Yellowknife 2015
For Yellowknife, above average temperatures and below average
precipitation continue to affect the region.
Temperature Precipitation
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Yellowknife 2015
Elevated BUI conditions continue into June and July but settle in
August. CSSR conditions remain high.
BUI CSSR
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Penticton 2015
Southern BC may experience an extremely hot summer, but the models
show a dichotomous predictions on precipitation.
Temperature Precipitation
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Penticton 2015
The highly variable precipitation forecasts result in low confidence in
the fire danger forecast.
BUI CSSR
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2015 Prediction
In April, it appeared that western Canada would see a
early start to the fire season.
Elevated conditions are being seen in much of
western Canada, especially across the northern
prairies.
Conditions across western Canada could moderate
later this summer, which could reduce fire danger.
This forecast appears to continue to hold true though
elevated conditions may continue later into the
summer.
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North American Seasonal Assessment
A forecast produced in April included the northern Prairies and southern
NWT as areas of concern in the North American Seasonal Assessment.
This continue to be the case though it will likely continue into July.
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The End