Climate Moisture Index for Canada - Medium-term (2041-2070) under RCP 8.5
type: Dataset
description: Drought is a deficiency in precipitation over an extended period, usually a season or more, resulting in a water shortage that has adverse impacts on vegetation, animals and/or people. The Climate Moisture Index (CMI) was calculated as the difference between annual precipitation and potential evapotranspiration (PET) – the potential loss of water vapour from a landscape covered by vegetation. Positive CMI values indicate wet or moist conditions and show that precipitation is sufficient to sustain a closed-canopy forest. Negative CMI values indicate dry conditions that, at best, can support discontinuous parkland-type forests. The CMI is well suited to evaluating moisture conditions in dry regions such as the Prairie Provinces and has been used for other ecological studies. Mean annual potential evapotranspiration (PET) was estimated for 30-year periods using the modified Penman-Monteith formulation of Hogg (1997), based on monthly 10-km gridded temperature data. Data shown on maps are 30-year averages. Historical values of CMI (1981-2010) were created by averaging annual CMI calculated from interpolated monthly temperature and precipitation data produced from climate station records. Future values of CMI were projected from downscaled monthly values of temperature and precipitation simulated using the Canadian Earth System Model version 2 (CanESM2) for two different Representative Concentration Pathways (RCP). RCPs are different greenhouse gas concentration trajectories adopted by the Intergovernmental Panel on Climate Change (IPCC) for its fifth Assessment Report. RCP 2.6 (referred to as rapid emissions reductions) assumes that greenhouse gas concentrations peak between 2010-2020, with emissions declining thereafter. In the RCP 8.5 scenario (referred to as continued emissions increases) greenhouse gas concentrations continue to rise throughout the 21st century. Provided layer: projected mean annual Climate Moisture Index across Canada for the medium-term (2041-2070…
issued: 2025-11-25T01:33:40.289591
modified: 2025-11-25T01:33:40.289595
contact point: Organization
keyword: AmeriGEO
keyword: AmeriGEOSS
keyword: CKAN
keyword: Canada
keyword: GEO
keyword: GEOSS
keyword: National
keyword: North America

Indice d'humidité climatique selon le RCP 8.5 - Moyen terme [2041-2070]
type: Distribution
format: Esri REST
issued: 2018-08-23T15:46:04.335949
modified: 2025-11-25T01:33:40.282057
access URL: https://webservices.maps.canada.ca/arcgis/rest/services/NRCan/climate_moisture_index_fr/MapServer/2

Climate Moisture Index (English)
type: Distribution
issued: 2018-08-23T15:46:04.335938
modified: 2025-11-25T01:33:40.280441
access URL: http://ftp.maps.canada.ca/pub/nrcan_rncan/Climate_Climat/climate_moisture_index/climate_moisture_index_en.gdb.zip
media type: FGDB/GDB

Climate Moisture Index under RCP 8.5 - Medium-term [2041-2070] (Layer)
type: Distribution
format: WMS
issued: 2018-08-23T15:46:04.335924
modified: 2025-11-25T01:33:40.279495
access URL: https://webservices.maps.canada.ca/arcgis/services/NRCan/climate_moisture_index_en/MapServer/WMSServer

Indice d'humiditÃ© climatique selon le RCP 8.5 - Moyen terme [2041-2070] (Layer)
type: Distribution
format: WMS
issued: 2018-08-23T15:46:04.335935
modified: 2025-11-25T01:33:40.279997
access URL: https://webservices.maps.canada.ca/arcgis/services/NRCan/climate_moisture_index_fr/MapServer/WMSServer

Climate Moisture Index (English)
type: Distribution
format: MXD
issued: 2018-08-23T15:46:04.335951
modified: 2025-11-25T01:33:40.282496
access URL: http://ftp.maps.canada.ca/pub/nrcan_rncan/Climate_Climat/climate_moisture_index/climate_moisture_index_en.mxd

Climate Moisture Index (French)
type: Distribution
format: MXD
issued: 2018-08-23T15:46:04.335953
modified: 2025-11-25T01:33:40.282915
access URL: http://ftp.maps.canada.ca/pub/nrcan_rncan/Climate_Climat/climate_moisture_index/climate_moisture_index_fr.mxd

Forest Change Data Catalogue
type: Distribution
format: TIFF
issued: 2018-08-23T15:46:04.335944
modified: 2025-11-25T01:33:40.281233
access URL: http://cfs.nrcan.gc.ca/fc-data-catalogue/read/1

Climate Moisture Index under RCP 8.5 - Medium-term [2041-2070]
type: Distribution
format: Esri REST
issued: 2018-08-23T15:46:04.335946
modified: 2025-11-25T01:33:40.281639
access URL: https://webservices.maps.canada.ca/arcgis/rest/services/NRCan/climate_moisture_index_en/MapServer/2

Climate Moisture Index (French)
type: Distribution
issued: 2018-08-23T15:46:04.335941
modified: 2025-11-25T01:33:40.280841
access URL: http://ftp.maps.canada.ca/pub/nrcan_rncan/Climate_Climat/climate_moisture_index/climate_moisture_index_fr.gdb.zip
media type: FGDB/GDB

Canada
type: Agent