Sixteen Natural Droughts Since 1658 Worse Than Todays

Tree rings are magical. Not only can you reconstruct temperatures from the past, but you can reconstruct droughts (rainfall).

Whenever I see the word “novel approach” I worry we are in for BS.

However, since the authors of this paper are saying things were worse in the past than present I like to pretend I believe them.

They also sort of say that more dendrohydrologists are needed. Surprise.

Recent streamflow droughts in south coastal British Columbia have had major socioeconomic and ecological impacts. Increasing drought severity under projected climate change poses serious water management challenges, particularly in the small coastal watersheds that serve as primary water sources for most communities in the region. A 332-year dendrohydrological record of regionalized mean summer streamflow for four watersheds is analyzed to place recent drought magnitudes in a long-term perspective.

We present a novel approach for optimizing tree-ring based reconstructions in small watersheds in temperate environments, combining winter snow depth and summer drought sensitive proxies as model predictors. The reconstruction model, estimated by regression of observed flows on Tsuga mertensiana ring-width variables and a tree-ring derived paleorecord of the Palmer Drought Severity Index, explains 64% of the regionalized streamflow variance.

The model is particularly accurate at estimating lowest flow events, and provides the strongest annually resolved paleohydrological record in British Columbia. The extended record suggests that since 1658 sixteen natural droughts have occurred that were more extreme than any within the instrumental period. Flow-duration curves show more severe worst-case scenario droughts and a higher probability of those droughts in the long-term reconstruction than in the hydrometric data.

Such curves also highlight the value of dendrohydrology for probabilistic drought assessment. Our results suggest current water management strategies based on worst-case scenarios from historical gauge data likely underestimate the potential magnitudes of natural droughts. If the low-flow magnitudes anticipated under climate change co-occur with lowest possible natural flows, streamflow drought severities in small watersheds in south coastal British Columbia could exceed any of those experienced in the past ∼350 years.

 

British Columbia Canada Tmax – Missing Data April 2015

This a followup to this post: British Columbia Canada Tmax , Tmin and Tmean from 1873 (On 1×1 Grid)

The following map shows which stations were missing (or not missing) daily Tmax data in the monthly summary for April 2015.

Blue had 0-3 days missing. Red more than 3. What saddens me is that 19 out of the 43 “red” stations were also “Normals” – which means they were reference stations.

Canada Monthly Summary Analysis - Missing Tmax Data - April 2015

 

 

British Columbia February 2014 – Coldest and Warmest

Using data from Environment Canada, these are the 25 coldest/warmest days in BC weather stations.

Something new I learned was that PUNTZI MOUNTAIN was a Pinetree Line base. While I was never anywhere near Puntzi Mountain, a long, long time ago I did spend 2 nights at the Kamloops Pinetree Line base. The “new” computer room was pretty big. The “old” computer room was massive.

Coldest

Name DATE MINTEMP MAXTEMP
PUNTZI MOUNTAIN (AUT) 2014-02-06 -41.1 -14.7
PUNTZI MOUNTAIN (AUT) 2014-02-07 -40.1 -12.8
NELSON NE 2014-02-07 -40 -4.5
PUNTZI MOUNTAIN (AUT) 2014-02-05 -39.7 -15.6
PUNTZI MOUNTAIN (AUT) 2014-02-08 -38.9 -13.9
PUNTZI MOUNTAIN (AUT) 2014-02-09 -38.6 -12.1
PLEASANT CAMP 2014-02-23 -38 -3
DEASE LAKE (AUT) 2014-02-10 -37.7 -19.3
BUFFALO LAKE 2014-02-06 -37.5 -15
DEASE LAKE A 2014-02-10 -37.1 -19.1
BLUE RIVER A 2014-02-08 -36.6 -11
BLUE RIVER A 2014-02-07 -36.5 -13
BUFFALO LAKE 2014-02-05 -36.5 -16.5
BUFFALO LAKE 2014-02-08 -36.5 -13
FORT NELSON A 2014-02-11 -36.3 -18.9
BURNS LAKE DECKER LAKE 2014-02-07 -36.2 -12.3
CLINTON A 2014-02-06 -36.2 -14.3
FORT NELSON A 2014-02-13 -35.8 -18.6
DEASE LAKE (AUT) 2014-02-06 -35.7 -18.2
BLUE RIVER A 2014-02-06 -35.6 -15.3
BURNS LAKE DECKER LAKE 2014-02-06 -35.6 -14.2
BLUE RIVER CS 2014-02-06 -35.5 -14.4
BUFFALO LAKE 2014-02-07 -35.5 -17.5
BLUE RIVER CS 2014-02-07 -35.4 -13.4
DEASE LAKE A 2014-02-06 -35.3 -18.8

Warmest

Name DATE MINTEMP MAXTEMP
CHROME ISLAND 2014-02-14 4 15
TAHSIS VILLAGE NORTH 2014-02-25 3 15
TAHSIS VILLAGE NORTH 2014-02-27 4 14.5
ZEBALLOS MURAUDE CREEK 2014-02-27 3 14.5
WHITE ROCK CAMPBELL SCIENTIFIC 2014-02-28 3.4 14.3
OSOYOOS CS 2014-02-12 -0.9 14.1
CASTLEGAR BCHPA DAM 2014-02-28 -9 14
PORT MELLON 2014-02-28 3.1 13.8
OSOYOOS CS 2014-02-13 0.2 13.6
SQUAMISH AIRPORT 2014-02-27 1.3 13.6
CHROME ISLAND 2014-02-13 5 13.5
GOLD RIVER TOWNSITE 2014-02-28 1 13.5
PENTICTON A 2014-02-12 -1.5 13.3
TOFINO A 2014-02-28 5.4 13.3
PENTICTON A 2014-02-13 -1.2 13.2
SQUAMISH AIRPORT 2014-02-28 0.8 13.2
QUALICUM BEACH AIRPORT 2014-02-13 2.9 13.1
GOLD RIVER TOWNSITE 2014-02-27 1.5 13
PITT MEADOWS CS 2014-02-28 1.9 13
SUMMERLAND CS 2014-02-12 0.2 13
TAHSIS VILLAGE NORTH 2014-02-28 1 13
ASHCROFT 2014-02-13 -0.1 12.9
DELTA BURNS BOG 2014-02-14 1.9 12.7
DELTA BURNS BOG 2014-02-13 2.2 12.6
NANAIMO A 2014-02-14 0.9 12.6

Environmentalists Win Battle Over Keystone XL – Environment Loses War

Environmentalists have kept the Keystone XL pipeline from being finished. Pipelines are the safest way to move oil to oil terminals on various costs of the USA and Canada. They are not perfect. There is some risk. But there is risk in every project.

Now oil companies are bypassing the Keystone.  They are going to move the oil (in fact they are already moving the oil) via rail. Moving oil by rail is not as safe. But it is easier to add rail cars and more rail terminals than it is to get a pipeline approved.

Way to go environmental morons. (Warning. Link is to NY Times)

“Since July, plans have been announced for three large loading terminals in western Canada with the combined capacity of 350,000 barrels a day — equivalent to roughly 40 percent of the capacity of the proposed Keystone XL pipeline that is designed to bring oil from western Alberta to refineries along the Gulf Coast.  Over all, Canada is poised to quadruple its rail-loading capacity over the next few years to as much as 900,000 barrels a day, up from 180,000 today.”

“The Canadians remain a few years behind producers in North Dakota, where the paucity of pipelines encouraged early oil explorers like EOG Resources to form a partnership with Burlington Northern Santa Fe to build terminals for the shipment of oil by rail to refineries across the country.  Today more than three-quarters of North Dakota’s production, which also was to move on the Keystone XL pipeline, is transported by rail. The Canadian oil producers took notice.”

BC Canada 1988-2012: 124 out of 143 stations last 5 years have been the coldest (or 2nd coldest) out of 25 years

The province of BC in Canada has really cooled off in the last 5 years. This post is an attempt to quantify it.

I am using data from Environment Canada monthly summaries. An example is here.

Some of the BC stations have  “normals” (anomalies) calculated by EC  based on the 1971-2000 average. (The D column in the summaries).

In 2013, there are 661 stations in BC reporting in the monthly summaries.  237 have normals calculated. 143 of those have data in all five of the 5 year periods from 1988 to 2012.

I calculated 5 year averages for each 5 year period : 1988-1992, 1993-1997, 1998-2002, 2003-2007 and 2008 to 2012.

And then I ranked them so that 1 would be the warmest and 5 would be the coldest. If there had been steadily rising temperatures from 1988 to 2012, the rank would be 5 4 3 2 1.

An example with a rank of 4 5 3 2 1 is Wardner Ktny Hatchery. Not quite a 5 4 3 2 1 ranking because it cooled a bit in 1993-1997 compared to 1988-1992.

The anomaly rose from .62C in 1988-1992 to 1.28C in 2008-2012.

Prov Stn_Name 1988-1992 1993-1997 1998-2002 2003-2007 2008-2012 Rank
BC WARDNER KTNY HATCHERY 0.62 0.07 0.79 1.07 1.28 4 5 3 2 1

So, how many of the 143 have a rank of 5 4 3 2 1? None.

Ok, how many of the 143 have a rank ending with 1 (meaning 2008-2012 was the warmest 5 year period)? One. Wardner Ktny Hatchery. As shown above.

How about those with a rank ending in 2 (meaning the most current 5 year period is the 2nd warmest? Two out of 143.

16 end with a 3 (meaning the most current 5 year period is the 3rd warmest).

42 end with a 4 (meaning the most current 5 year period is the 4th warmest).

82 end with a 5 (meaning the most current 5 year period is the coldest in the last 25 years)!!!!

124 out of 143 stations have the coldest or 2nd coldest 5 year period.

All 143 below:

Prov Stn Name 1988-1992 1993-1997 1998-2002 2003-2007 2008-2012 Rank
BC ABBOTSFORD A 0.47 0.54 0.57 1 0.31 4 3 2 1 5
BC ADDENBROKE ISLAND 0 0.05 0.16 0.67 -0.18 4 3 2 1 5
BC AGASSIZ CDA 0.41 0.42 0.29 0.77 0.16 3 2 4 1 5
BC ALBERNI ROBERTSON CREEK 0.41 0.46 0.44 0.49 0.25 4 2 3 1 5
BC ATLIN 0.58 0.19 1.01 1.01 0.05 3 4 2 1 5
BC BABINE LAKE PINKUT CREEK 0.84 0.04 0.66 0.99 0.85 3 5 4 1 2
BC BARKERVILLE 0.28 -0.09 0.09 0.44 -1.08 2 4 3 1 5
BC BELLA COOLA A 0.31 -0.43 -0.12 0.23 -0.25 1 5 3 2 4
BC BLUE RIVER A 0.48 -0.03 0.46 0.82 0.36 2 5 3 1 4
BC BOAT BLUFF 0.18 0.26 -0.27 0.28 -0.15 3 2 5 1 4
BC BONILLA ISLAND 0.24 0.63 0.17 0.74 -0.12 3 2 4 1 5
BC BRIDGE LAKE 2 0.34 -0.37 -0.05 0.24 -0.26 1 5 3 2 4
BC BURNABY SIMON FRASER U 0.44 0.44 -0.06 0.46 -0.13 3 2 4 1 5
BC CAMPBELL RIVER A 0.51 0.46 0.44 0.87 0.41 2 3 4 1 5
BC CAPE BEALE LIGHT 0.02 0.18 -0.2 0.41 -0.23 3 2 4 1 5
BC CAPE MUDGE 0.37 -0.18 0.17 0.54 0.27 2 5 4 1 3
BC CAPE SCOTT 0.23 0.66 0.08 0.4 -0.31 3 1 4 2 5
BC CARIBOO LODGE 0.35 -0.21 0.29 0.47 -0.63 2 4 3 1 5
BC CASTLEGAR A 0.35 0.06 0.56 0.8 0.1 3 5 2 1 4
BC CASTLEGAR BCHPA DAM 0.28 0.06 0.98 1.28 0.74 4 5 2 1 3
BC CHATHAM POINT 0.29 0.27 0.46 0.77 0.17 3 4 2 1 5
BC CHETWYND A 0.44 -0.69 0.16 0.44 -0.02 2 5 3 1 4
BC CHILLIWACK 0.19 0.04 0.13 0.57 -0.09 2 4 3 1 5
BC CHILLIWACK R HATCHERY 0.12 0.11 0.08 0.41 -0.36 2 3 4 1 5
BC COMOX A 0.38 0.31 0.32 0.66 0.06 2 4 3 1 5
BC COOMBS 0.01 0.22 0.23 0.78 0.46 5 4 3 1 2
BC COWICHAN LAKE FORESTRY 0.35 0.32 0.22 0.6 -0.67 2 3 4 1 5
BC CRANBROOK A 0.48 -0.14 0.52 0.74 0.18 3 5 2 1 4
BC CRESTON 0.24 0.17 0.74 1.13 0.27 4 5 2 1 3
BC DARFIELD 0.26 -0.24 0.5 0.74 0.14 3 5 2 1 4
BC DAWSON CREEK A 0.7 -0.36 0.42 0.55 0.01 1 5 3 2 4
BC DEASE LAKE 0.44 0.24 0.52 0.66 0.08 3 4 2 1 5
BC DRYAD POINT 0.16 0.3 -0.01 0.41 -0.39 3 2 4 1 5
BC DUNCAN LAKE DAM 0.37 0.09 0.57 0.81 0.11 3 5 2 1 4
BC EGG ISLAND 0.26 0.56 0.3 0.45 -0.11 4 1 3 2 5
BC ESTEVAN POINT 0.38 0.39 0.27 0.64 -0.15 3 2 4 1 5
BC FAUQUIER 0.5 0.03 0.54 0.76 -0.18 3 4 2 1 5
BC FERNIE 0.58 -0.08 0.64 1.13 0.44 3 5 2 1 4
BC FORDING RIVER COMINCO -0.14 -0.5 0.55 0.94 -0.63 3 4 2 1 5
BC FORT NELSON A 0.1 0.08 0.64 0.8 0.39 4 5 2 1 3
BC FORT ST JAMES 0.78 -0.02 0.47 0.8 0.2 2 5 3 1 4
BC FORT ST JOHN A 0.66 -0.28 0.54 0.58 0.13 1 5 3 2 4
BC FRASER LAKE NORTH SHORE 0.81 0.28 0.83 1.2 0.8 3 5 2 1 4
BC FT STEELE DANDY CRK 0.46 -0.11 0.32 0.89 0.04 2 5 3 1 4
BC GABRIOLA ISLAND 0.16 0.22 -0.17 0.45 -0.64 3 2 4 1 5
BC GERMANSEN LANDING 0.75 0.2 0.5 0.86 0.44 2 5 3 1 4
BC GIBSONS GOWER POINT 0.32 0.31 0.38 0.82 0.3 3 4 2 1 5
BC GLACIER NP MT FIDELITY 0.31 0.05 0.44 0.74 -0.31 3 4 2 1 5
BC GLACIER NP ROGERS PASS 0.35 0.12 0.52 0.9 -0.01 3 4 2 1 5
BC GOLD RIVER TOWNSITE 0.25 0.22 0.2 0.69 0.05 2 3 4 1 5
BC GOLDEN A 0.58 0.18 0.87 1.02 0.5 3 5 2 1 4
BC GOLDSTREAM RIVER 0.15 -0.42 0.38 0.49 -2.05 3 4 2 1 5
BC GRAND FORKS 0.41 -0.01 0.79 0.83 0 3 5 2 1 4
BC GREEN ISLAND 0.02 0.14 0.1 0.53 -0.12 4 2 3 1 5
BC HANEY EAST -0.16 0.28 0.32 0.83 0 5 3 2 1 4
BC HANEY UBC RF ADMIN 0.33 0.46 0.3 0.72 0.02 3 2 4 1 5
BC HIGHLAND VALLEY LORNEX 0.84 0.08 0.39 1.08 0.43 2 5 4 1 3
BC HIXON 0.58 -0.03 0.57 0.91 -0.3 2 4 3 1 5
BC HOPE SLIDE 0.5 0.03 -0.05 0.54 -0.13 2 3 4 1 5
BC JOE RICH CREEK 0.62 -0.04 0.7 0.98 -0.54 3 4 2 1 5
BC KAMLOOPS A 0.42 -0.13 0.65 1.02 0.5 4 5 2 1 3
BC KASLO 0.44 0.02 0.51 0.94 0.09 3 5 2 1 4
BC KEMANO 0.7 0.56 0.28 0.97 -0.5 2 3 4 1 5
BC KITIMAT 2 0.58 0.3 0.02 0.56 -0.68 1 3 4 2 5
BC KITIMAT TOWNSITE 0.72 0.53 0.41 1.01 0.06 2 3 4 1 5
BC KOOTENAY NP WEST GATE 0.21 0.01 0.63 0.71 0.26 4 5 2 1 3
BC LAIDLAW 0.28 -0.12 0.18 0.56 -0.37 2 4 3 1 5
BC LANGARA 0.25 0.34 0.02 0.5 -0.32 3 2 4 1 5
BC LITTLE QUALICUM HATCHERY 0.15 0.14 0.16 0.53 -0.1 3 4 2 1 5
BC LUNCH LAKE 0.35 -0.39 0.14 0.24 -0.47 1 4 3 2 5
BC MACKENZIE A 0.78 0.26 0.7 1.14 0.39 2 5 3 1 4
BC MALIBU JERVIS INLET 0.2 0.16 0.14 0.63 -0.02 2 3 4 1 5
BC MARYSVILLE 0.25 -0.09 0.61 1.08 -0.5 3 4 2 1 5
BC MCINNES ISLAND 0.2 0.51 0.18 0.51 -0.18 3 2 4 1 5
BC MCLEESE LAKE FRASERVIEW 0.08 -0.31 1 1.4 0.25 4 5 2 1 3
BC MCLEESE LAKE GRANITE MT 0.52 0.05 0.26 0.55 0 2 4 3 1 5
BC MERRITT STP 0.6 -0.01 0.69 1.08 0.47 3 5 2 1 4
BC MERRY ISLAND LIGHTSTATIO 0.3 0.43 0.21 0.76 0.35 4 2 5 1 3
BC MICA DAM 0.52 -0.02 0.64 0.72 -0.02 3 5 2 1 4
BC MISSION WEST ABBEY 0.24 0.45 0.17 0.43 -0.32 3 1 4 2 5
BC MUD BAY 0.32 0.4 -0.01 0.88 -0.55 3 2 4 1 5
BC MUNCHO LAKE 0.59 0.49 0.68 0.86 -0.24 3 4 2 1 5
BC N VAN SEYMOUR HATCHERY 0.21 0.15 0.12 0.27 -0.38 2 3 4 1 5
BC N VANC GROUSE MTN RESORT 0.44 0.22 0.93 0.96 -0.04 3 4 2 1 5
BC NANAIMO A 0.35 0.32 0.22 0.56 0.13 2 3 4 1 5
BC NASS CAMP 0.35 0.1 0.29 0.79 -0.05 2 4 3 1 5
BC NEW DENVER 0.46 -0.06 0.8 1.2 0.33 3 5 2 1 4
BC NITINAT RIVER HATCHERY 0.25 0.3 -0.23 0.38 -0.31 3 2 4 1 5
BC NOOTKA LIGHTSTATION 0.02 0.25 -0.15 0.29 -0.6 3 2 4 1 5
BC OLIVER 0.65 0.37 1.23 1.34 0.16 3 4 2 1 5
BC OLIVER STP 0.33 0.17 1 1.12 0.53 4 5 2 1 3
BC OOTSA L SKINS L SPILLWAY 0.9 -0.55 -0.3 0.46 -0.98 1 4 3 2 5
BC OSOYOOS WEST 0.44 -0.04 0.77 0.93 0.21 3 5 2 1 4
BC PACHENA POINT 0.37 0.98 -0.65 -0.15 -0.28 2 1 5 3 4
BC PEACHLAND 0.4 -0.07 0.34 0.61 0.26 2 5 3 1 4
BC PENTICTON A 0.46 -0.12 0.63 0.82 0.07 3 5 2 1 4
BC PLEASANT CAMP 0.18 0.29 0.26 0.44 -0.58 4 2 3 1 5
BC PORT ALICE 0.4 0.4 -0.03 0.49 -0.01 3 2 5 1 4
BC PORT HARDY A 0.35 0.42 0.21 0.63 -0.08 3 2 4 1 5
BC PORT MOODY GLENAYRE 0.31 0.4 0.05 0.24 -0.43 2 1 4 3 5
BC PORT RENFREW 0.33 0.44 0.22 0.7 0.05 3 2 4 1 5
BC POWELL RIVER A 0.34 0.34 0.25 0.48 -0.05 3 2 4 1 5
BC PRINCE GEORGE A 0.5 -0.01 0.56 0.81 -0.2 3 4 2 1 5
BC PRINCE GEORGE STP 0.25 -0.3 0.16 0.65 0.07 2 5 3 1 4
BC PRINCETON A 0.4 0.08 0.64 0.7 0.08 3 5 2 1 4
BC PUNTCHESAKUT LAKE 0.45 -0.22 0.55 0.58 -0.9 3 4 2 1 5
BC QUALICUM R FISH RESEARCH 0.35 0.26 0.4 0.78 0.38 4 5 2 1 3
BC QUATSINO 0.64 0.54 0.09 0.34 -0.62 1 2 4 3 5
BC QUATSINO LIGHTSTATION 0.12 0.32 -0.38 0.38 -0.24 3 2 5 1 4
BC QUINSAM RIVER HATCHERY 0.3 0.35 0.23 0.54 -0.21 3 2 4 1 5
BC RICHMOND NATURE PARK 0.31 0.32 0.32 0.37 -0.1 4 3 2 1 5
BC SAANICHTON CDA 0.27 0.38 0.31 0.58 -0.3 4 2 3 1 5
BC SALMON ARM A 0.32 -0.38 0.6 1.03 0.24 3 5 2 1 4
BC SALTSPRING ST MARYS L 0.29 0.34 0.48 0.7 0.15 4 3 2 1 5
BC SANDSPIT A 0.3 0.28 -0.01 0.47 -0.3 2 3 4 1 5
BC SARDIS 0.21 0.09 -0.26 0.16 -1.96 1 3 4 2 5
BC SEWALL MASSET INLET 0.13 0.4 -0.14 0.29 -0.33 3 1 4 2 5
BC SHAWNIGAN LAKE 0.5 0.36 0.22 0.78 -0.07 2 3 4 1 5
BC SMITHERS A 0.58 -0.12 0.26 0.66 0.14 2 5 3 1 4
BC SOUTH SLOCAN 0.77 0.38 0.97 1.27 -0.4 3 4 2 1 5
BC SPARWOOD 0.18 -0.48 0.43 0.77 0.12 3 5 2 1 4
BC SPOKIN LAKE 4E 0.04 -0.21 0.38 0.47 -0.16 3 5 2 1 4
BC SQUAMISH UPPER 0.47 -0.3 0.08 0.44 -0.12 1 5 3 2 4
BC STEWART A 0.16 0.09 0.1 0.38 -0.36 2 4 3 1 5
BC STUIE TWEEDSMUIR LODGE -0.01 0.01 0.28 0.64 0.04 5 4 2 1 3
BC SUSKWA VALLEY 0.27 -0.47 0.06 0.54 -0.68 2 4 3 1 5
BC TERRACE A 0.47 0.25 0.07 0.62 -0.08 2 3 4 1 5
BC TERRACE PCC 0.53 0.44 0.43 0.95 0.2 2 3 4 1 5
BC TOFINO A 0.36 0.49 0.07 0.69 0.13 3 2 5 1 4
BC TOPLEY LANDING 0.64 -0.04 0.38 0.96 0.18 2 5 3 1 4
BC VANCOUVER HARBOUR CS 0.3 0.62 0.32 0.22 -0.1 3 1 2 4 5
BC VANCOUVER INTL A 0.34 0.38 0.37 0.72 0.19 4 2 3 1 5
BC VANDERHOOF 0.23 -0.33 0.35 0.57 0.05 3 5 2 1 4
BC VAVENBY 0.38 -0.11 0.66 0.82 0.61 4 5 2 1 3
BC VERNON BELLA VISTA 0 -0.21 0.47 0.81 0.08 4 5 2 1 3
BC VICTORIA INTL A 0.15 0.5 0.43 0.78 0.06 4 2 3 1 5
BC WARDNER KTNY HATCHERY 0.62 0.07 0.79 1.07 1.28 4 5 3 2 1
BC WASA -0.16 -0.13 0.86 1.09 0.54 5 4 2 1 3
BC WESTWOLD 0.48 -0.07 0.94 0.9 0.2 3 5 1 2 4
BC WHISTLER 0.48 0.34 0.58 0.88 0.08 3 4 2 1 5
BC WILLIAM HEAD 0.36 0.58 0.68 0.9 0.3 4 3 2 1 5
BC WILLIAMS LAKE A 0.53 -0.16 0.51 0.7 0.22 2 5 3 1 4
BC WINFIELD 0.56 0.04 0.85 1.11 0.6 4 5 2 1 3

Vancouver and Victoria Airports in BC Colder Thans 1940s/1960s

The next two graphs are anomaly data from Environment Canada up to Feb 2013. The data in the boxes is the 5 year average. Red for warmer than 1971-2000, blue for colder.

For Victoria, the last 5 years have been only .06C warmer than the 1971-2000 average. More importantly, it is the coldest 5 year period in the last 25 years. And colder than the period around 1960.  And it would probably be colder than the 1940s if the data went back that far,

For Vancouver, the last 5 years have been only .18C warmer than the 1971-2000 average. More importantly, it is the coldest 5 year period in the last 25 years. And colder than the period around 1960.  And colder than the 5 year period around 1940 .

Click to enlarge.

All Data - VICTORIA INTL A - Environment Canada as of  February 2013

All Data - VANCOUVER INTL A - Environment Canada as of  February 2013