Adjusted daily rainfall and snowfall dataset for Canada
The AdjDlyRS dataset contains adjusted daily rainfall (R) and snowfall (S) data from all Canadian stations reporting rainfall and snowfall for which we have metadata to do the adjustments (Wang et al. 2017). The processing includes inspection and adjustments using quality control procedures customized for producing gridded datasets (Wang et al. 2017), including: (1) conversion of snowfall ruler measurements to their water equivalents; (2) corrections for gauge undercatch and evaporation due to wind effect, for gauge specific wetting loss, and for trace precipitation amount; and (3) treatment of flags (e.g. accumulation flags). Version 2020 or later versions of this dataset also includes identification and correction of random erroneous values, including false zeros, which usually arose from missing values being misrecorded as 0 precipitation in the climate Archive (Cheng et al. 2022). All the identified erroneous daily values are set to missing. A total of 3346 stations were processed, but the data series are not homogenized. Most of the stations are located in southern Canada and have short and/or seasonal data records. The number of stations changes over time: there are 512-958 stations in the period 1948-1964, 1012-2038 stations in the period 1965-2008, and only around 300 stations in the recent years. Note that the unadjusted/raw total precipitation data in Environment and Climate Change Canada's digital Archive underestimate more than 25% of the total precipitation in northern Canada, and about 10-15% in most of southern Canada (Wang et al. 2017).
References: (1) Wang, X. L., Xu, B. Qian, Y. Feng, E. Mekis, 2017: Adjusted daily rainfall and snowfall data for Canada, Atmosphere-Ocean, 55:3, 155-168, DOI:10.1080/07055900.2017.1342163. (2) Cheng, V. Y.S., X. L. Wang, Y. Feng, 2022: A quality control system for historical in situ precipitation data. Atmosphere-Ocean (submitted)
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Metadata Record Information
- File Identifier
- d8616c52-a812-44ad-8754-7bcc0d8de305 XML
- Date Stamp
- 2022-11-30T22:53:49
- Metadata language
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eng; CAN
- Character set
- UTF8
- Hierarchy Level
- Dataset
http://ec.gc.ca
Data identification
- Title
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Adjusted daily rainfall and snowfall dataset for Canada
- Date (Creation)
- 2017-03-30
- Date (Publication)
- 2017-04-14
- Status
- On going
- Metadata language
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eng
- Character set
- UTF8
- Topic category
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- Climatology, meteorology, atmosphere
- Maintenance and Update Frequency
- As needed
- Spatial representation type
- Vector
Keywords
- Theme
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rainfall, snowfall, climate change, Canada
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ECCC Information Category EN
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Weather and Climate
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Government of Canada Core Subject Thesaurus
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Precipitation
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Climate change
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Business Functions
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Provide Climate Information Products and Services
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Deliver Climate Products and Services to Clients
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Geography
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National (CA)
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external.theme.EC_Branch
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Science and Technology Branch
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external.theme.EC_Directorate
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Atmospheric Science and Technology
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external.theme.GC_Security_Level
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Unclassified
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- Use Limitation
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Open Government Licence - Canada ( http://open.canada.ca/en/open-government-licence-canada)
- Access Constraints
- License
- Use Constraints
- License
- Begin Date
- 2017-03-30
Extent
))
Ref. system Reference Systems
- Reference system identifier
- EPSG / EPSG:4326 /
Distribution
Distribution Formats
- Distribution format
-
- ZIP ( v2)
http://ec.gc.ca
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