Data & Resources
Description
Bioclim V2.1 data for the period 1970-2000 are a set of 19 bioclimatic variables derived from monthly temperature and precipitation values. These original data, at a spatial resolution of around 1 km², are static, representing climatological averages over a defined reference period (1970-2000). These variables have been aggregated at fokontany and commune level, taking the spatial average within the polygons of each administrative zone. An additional aggregation was also performed at the level of the 500-meter buffer zones around the IHOPE survey villages, providing village-level monthly estimates for each site.
Columns
fid
numeric id of Commune / fokontany
cluster
geographic grouping of villages defined for the IHOPE survey sampling design
objectid
numeric id of village
new_commune
commune name after 2019
old_commune
commune name before 2019
comm_fkt
name of fokontany using standardized ‘new_commune’_’fokontany’ nomenclature
bio_1
Annual Mean Temperature (°C)
bio_2
Mean Diurnal Range (°C) (Annual mean of (Tmax - Tmin))
bio_3
Isothermality (%) ((BIO2/BIO7) × 100)
bio_4
Temperature Seasonality ((Temperature standard deviation) × 100))
bio_5
Max Temperature of Warmest Month (°C)
bio_6
Min Temperature of Coldest Month (°C)
bio_7
Temperature Annual Range (°C)(BIO5 - BIO6)
bio_8
Mean Temperature of Wettest Quarter (°C)
bio_9
Mean Temperature of Driest Quarter (°C)
bio_10
Mean Temperature of Warmest Quarter (°C)
bio_11
Mean Temperature of Coldest Quarter (Mean temperature of coldest consecutive three months)
bio_12
Annual Precipitation (mm)
bio_1
Precipitation of Wettest Month (mm)
bio_14
Precipitation of Driest Month (mm)
bio_15
Precipitation Seasonality ((Precipitation standard deviation / Precipitation mean) × 100)
bio_16
Precipitation of Wettest Quarter (mm)
bio_17
Precipitation of Driest Quarter (mm)
bio_18
Precipitation of Warmest Quarter (mm)
bio_19
Precipitation of Coldest Quarter (mm)
Additional Info
✍️ Author
🔧 Maintainer
🗓 Last Updated
March 11, 2026
🔹 Data Link :
[https://www.worldclim.org/data/worldclim21.html#google_vignette](https://www.worldclim.org/data/worldclim21.html#google_vignette)
🔹 Processing Steps
Data aggregation by fokontany/commune using spatial average (weighted mean). The average value was calculated using Google Earth Engine's reducer function, which computes a weighted mean based on the proportion of each pixel area that falls within the polygon boundary.