Historical Canadian Climate Database - Monthly Homogenized Precipitation and Temperature Data Sets
Entry ID: Canada_EC_HistCdnClimateData

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Summary
Abstract: Monthly Rehabilitated Precipitation and Homogenized Temperature Data Sets
Climate Research Branch (CCRM) - Environment Canada.

A database of homogenized and long-term temperature and precipitation
time series has been specifically designed for climate change analyses over
Canada.

Temperature: The data consist of monthly maximum, minimum and mean
temperatures for 210 locations across the country. Series extend back to 1895
where possible: however, data availability over most of the Canadian Arctic is
restricted to the mid-1940s to present. Homogeneity problems caused by station
relocation and changes in observing procedures were addressed using a
regression model technique applied with surrounding stations. Monthly
adjustments were obtained for identified inhomogeneities (the cause was often
retrieved from the station history files) and a database of monthly maximum,
minimum and mean temperatures was created.

Precipitation:

A total of 495 locations, most with data covering the period
1895-present were used. Data availability in much of the Canadian Arctic was
restricted to 1948-present. Adjustments were applied on daily basis for rain
and snow separately. Metadata file was created containing all information about
the different precipitation measurement programs. For each rain gauge type,
different adjustments to account for wind undercatch, evaporation and wetting
loss were implemented. For snowfall, ruler measurements were used throughout
the time series in order to minimize potential discontinuities introduced by
the adoption of Nipher shielded gauge in the mid-1960s. Snow density
adjustments based upon coincident ruler and Nipher observations were mapped
over the country and applied to the ruler observations. Great care was taken to
properly account for the trace measurements.To provide Canadian precipitation
and temperature data sets for climate research.
Spatial Data Organization Information -

Indirect Spatial Reference:
Direct Spatial Reference: Point
Raster Object Type:
Row Count:
Column Count:
Vertical Count:
Spatial Reference Information -
Horizontal Coordinate System Definition -

Planar -

Planar Coordinate Encoding Method:
Coordinate Representation:
Abscissa Resolution:
Ordinate Resolution:
Distance and Bearing Representation:
Distance Resolution:
Bearing Resolution:
Bearing Units:
Bearing Reference Direction:
Bearing Reference Meridian:
Planar Distance Units:

Geodetic Model:
Horizontal Datum Name:
Ellipsoid Name:
Semi-major Axis:
Denominator of Flattening Ratio:

Related URL
Link: View Related Information


Link: View Related Information
Description: GeoConnections Discovery Portal. Canada's IDN Node.


Geographic Coverage
 N: 84.0 S: 42.0  E: -52.0  W: -141.0

Data Set Citation
Dataset Originator/Creator: Environment Canada, Meteorological Service of Canada, CCRM
Dataset Title: Historical Canadian Climate Database - Monthly Homogenized Precipitation and Temperature Data Sets
Online Resource: http://www.cccma.bc.ec.gc.ca/hccd/


Temporal Coverage
Start Date: 1895-01-01
Stop Date: 1999-12-31


Location Keywords
CONTINENT > NORTH AMERICA > CANADA
CONTINENT > NORTH AMERICA > CANADA > ALBERTA
CONTINENT > NORTH AMERICA > CANADA > BRITISH COLUMBIA
CONTINENT > NORTH AMERICA > CANADA > CANADIAN ARCTIC
CONTINENT > NORTH AMERICA > CANADA > MANITOBA
CONTINENT > NORTH AMERICA > CANADA > NEW BRUNSWICK
CONTINENT > NORTH AMERICA > CANADA > NEWFOUNDLAND AND LABRADOR
CONTINENT > NORTH AMERICA > CANADA > NORTHWEST TERRITORIES
CONTINENT > NORTH AMERICA > CANADA > NOVA SCOTIA
CONTINENT > NORTH AMERICA > CANADA > NUNAVUT
CONTINENT > NORTH AMERICA > CANADA > ONTARIO
CONTINENT > NORTH AMERICA > CANADA > PRINCE EDWARD ISLAND
CONTINENT > NORTH AMERICA > CANADA > QUEBEC
CONTINENT > NORTH AMERICA > CANADA > SASKATCHEWAN
GEOGRAPHIC REGION > ARCTIC
CONTINENT > NORTH AMERICA
GEOGRAPHIC REGION > MID-LATITUDE
GEOGRAPHIC REGION > NORTHERN HEMISPHERE
GEOGRAPHIC REGION > POLAR
GEOGRAPHIC REGION > WESTERN HEMISPHERE


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >MAXIMUM/MINIMUM TEMPERATURE    [Definition]
ATMOSPHERE >PRECIPITATION >LIQUID WATER EQUIVALENT    [Definition]
ATMOSPHERE >PRECIPITATION >PRECIPITATION AMOUNT    [Definition]
ATMOSPHERE >PRECIPITATION >RAIN    [Definition]
ATMOSPHERE >PRECIPITATION >SNOW    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Quality
ANNUALLY UPDATED


Keywords
GCMD
ADJUSTED DATA
CORRECTED DATA
EVAPORATION LOSS
GROUND STATION
HOMOGENIZED DATA
INSTRUMENTAL INHOMOGENEITIES
MONTHLY MAXIMUM TEMPERATURE
MONTHLY MEAN TEMPERATURE
MONTHLY MINIMUM TEMPERATURE
MONTHLY PRECIPITATION
MONTHLY RAINFALL
MONTHLY SNOWFALL
RAINFALL ADJUSTMENT
SNOW RULER
SNOWFALL ADJUSTMENT
STATION DATA
TRACE PRECIPITATION
WETTING LOSS
WIND-INDUCED UNDERCATCH


Data Set Progress
COMPLETE


Originating Center


Data Center
Meteorological Service of Canada, Environment Canada    [Information]
Data Center URL: http://www.msc-smc.ec.gc.ca/

Data Center Personnel
Name: TOMMY JANG
Phone: +01-416-739-5742
Fax: +01-416-739-5700
Email: Tommy.Jang at ec.gc.ca
Contact Address:
Climate Research Branch (CCRM)
4905 Dufferin Street
City: Downsview
Province or State: Ontario
Postal Code: M3H 5T4
Country: Canada



Distribution
Fees: Gratuit-Free


Personnel
LUCIE VINCENT
Role: DIF AUTHOR
Phone: +01-416-739-4337
Fax: +01-416-739-5700
Email: Lucie.Vincent at ec.gc.ca
Contact Address:
Climate Research Branch (CCRM)
4905 Dufferin Street
City: Downsview
Province or State: Ontario
Postal Code: M3H 5T4
Country: Canada


EVA MEKIS
Role: TECHNICAL CONTACT
Phone: +01-416-739-4374
Fax: +01-416-739-5700
Email: eva.mekis at ec.gc.ca
Contact Address:
Climate Research Branch (CCRM)
4905 Dufferin Street
City: Downsview
Province or State: Ontario
Postal Code: M3H 5T4
Country: Canada



Creation and Review Dates
DIF Creation Date: 2001-08-24
Last DIF Revision Date: 2009-01-15
Future DIF Review Date: 2005-01-31

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