How Wildfires Changed Plant Water Use (2017-2020 Fires)
What it measures. Shows how much the amount of water released by plants and soil (evapotranspiration) dropped after wildfires between 2017 and 2020, comparing the year just after each fire to the year just before. Bigger drops point to vegetation damaged by fire.
How it's made. Calculated with the DisALEXI model from OpenET satellite observations of evapotranspiration.
How & where you'd use it. Helps scientists track how fire disturbs vegetation and the local water cycle.
What's measured
Coverage & cadence
- Time span2017-01-01 → 2020-12-31
- Spatial extent-125.351, 29.833, -108.121, 49.039
- FormatsCOG
What you can do with it
- Track deforestation, fire scars and land-cover change
- Monitor crop and vegetation health (NDVI/EVI)
- Map how built-up vs. green an area is over time
Official description
Change in ET using DisALEXI model of OpenET observations for 2017-20 fires, calculated as the difference of ET in the immediate post-fire water year from ET in the immediate pre-fire water year. The difference is normalized by pre-fire ET and negative values denote vegetation disturbance induced by fire or by a climatological anomaly resulting in the decline in ET.
Get the data
# NASA VEDA — open STAC API, anonymous (cloud-optimized GeoTIFFs)
from pystac_client import Client
cat = Client.open("https://openveda.cloud/api/stac")
col = cat.get_collection("disalexi-etsuppression")
items = list(col.get_items()) # browse the analysis-ready COGs
# open an asset with rioxarray:
# import rioxarray; da = rioxarray.open_rasterio(items[0].assets["cog_default"].href)NASA VEDA is an open STAC catalog — browse and stream the cloud-optimized GeoTIFFs anonymously (no login).
Official links
- Open data source VEDA